Metadata
| Key | Value |
|---|---|
| engine | modal |
| prompt | completion |
| temp | 0.2 |
| top_p | 0.95 |
| max_new_tokens | 1024 |
| n_completions | 10 |
Solutions
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}
func parse(string: String) -> Any? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json
} catch {
return nil
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}
// JSON parser, returns `Any` type in case of failures.
func parse(string: String) -> Any? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json
} catch {
return nil
}
}
```let result = try parse(string: string) // ambiguous use of 'parse(string:)'_ = try parse(string: string) // ambiguous use of 'parse(string:)'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// Usage:
do {
let json = try parse(string: "{\"key\": \"value\"}")
print(json)
} catch {
print(error)
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
return nil
}
return json
} catch {
return nil
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
// JSON parser, returns `nil` in case of failures.
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
return nil
}
return json
} catch {
return nil
}
}
```let result = try parse(string: string) // ambiguous use of 'parse(string:)'_ = try parse(string: string) // ambiguous use of 'parse(string:)'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:]
} catch {
return nil
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
// JSON parser, returns NSError in case of failures.
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:]
} catch {
return nil
}
}
```return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // expected expressionreturn try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // value of optional type 'JSON???' (aka 'Optional<Optional<Optional<Dictionary<String, Any>>>>') must be unwrapped to a value of type 'JSON??' (aka 'Optional<Optional<Dictionary<String, Any>>>')return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // consecutive statements on a line must be separated by ';'return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // expected ']' in array typereturn try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // expected expressionreturn try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // consecutive statements on a line must be separated by ';'return try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // expected ']' in array typereturn try JSONSerialization.jsonObject(with: data, options: []) as? JSON?? [:] // value of optional type 'JSON???' (aka 'Optional<Optional<Optional<Dictionary<String, Any>>>>') must be unwrapped to a value of type 'JSON??' (aka 'Optional<Optional<Dictionary<String, Any>>>')let result = try parse(string: string) // ambiguous use of 'parse(string:)'_ = try parse(string: string) // ambiguous use of 'parse(string:)'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? JSON else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
// Example usage
do {
let json = try parse(string: "{\"key\": \"value\"}")
print(json)
} catch {
print(error)
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// Usage
do {
let json = try parse(string: "some invalid JSON")
print(json)
} catch {
print(error)
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
return json as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
return nil
}
return dictionary
} catch {
return nil
}
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
throw ParsingError.invalidInput
}
return dictionary
} catch {
throw ParsingError.internalError(error)
}
}
// JSON parser, returns NSError in case of failures.
func parse(string: String) -> JSON? {
guard let data = string.data(using:.utf8) else {
return nil
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let dictionary = json as? JSON else {
return nil
}
return dictionary
} catch {
return nil
}
}
```let result = try parse(string: string) // ambiguous use of 'parse(string:)'_ = try parse(string: string) // ambiguous use of 'parse(string:)'indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
let tree = HTMLNode.element("div", children: [
.element("a", attributes: ["href": "swifteval"])
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
let tree = HTMLNode.element("div", children: [
.element("a", attributes: ["href": "swifteval"])
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
let tree = HTMLNode.element("div", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [.text("SwiftEval")])
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// Usage
let tree = HTMLNode.element("div", children: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.text("Hello, Swift!")
])
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// Example of usage
let tree = HTMLNode.element("div", children: [
.element("a", attributes: ["href": "swifteval"]),
.text("Hello, World!")
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
let tree = HTMLNode.element("div", children: [
.element("a", attributes: ["href": "swifteval"])
])
print(generate(tree))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var result = "<\(name)"
for (key, value) in attributes {
result += " \(key)=\"\(value)\""
}
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
return result
}
}
// Create HTML tree from predefined elements.
let tree = HTMLNode.element("div", children: [
.element("a", attributes: ["href": "swifteval"]),
.text("Hello, World!")
])
// Print HTML tree.
print(generate(tree))
```enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: "()+-*/")
var stack = [Double]()
for token in tokens {
if token.isEmpty {
continue
}
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: "()+-*/")
var stack = [Double]()
for token in tokens {
if token.isEmpty {
continue
}
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
do {
let result = try calculate("2+2*2")
print(result)
} catch {
print(error)
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
return stack.popLast()!
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
return stack.popLast()!
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
try calculate("2+2*2") // 6
try calculate("2+2*2+2") // 6
try calculate("2+2*2+2*2") // 8
try calculate("2+2*2+2*2+2") // 10
try calculate("2+2*2+2*2+2*2") // 12
try calculate("2+2*2+2*2+2*2+2") // 14
try calculate("2+2*2+2*2+2*2+2*2") // 16
try calculate("2+2*2+2*2+2*2+2*2+2") // 18
try calculate("2+2*2+2*2+2*2+2*2+2*2") // 20
try calculate("2+2*2+2*2+2*2+2*2+2*2+2") // 22
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2") // 24
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2") // 26
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2") // 28
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2") // 30
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2") // 32
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2") // 34
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2") // 36
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2") // 38
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2") // 40
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2") // 42
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2") // 44
try calculate("2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2*2+2") // // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
return stack.popLast()!
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
return stack.popLast()!
}
let result = try calculate("2+2*2")
print(result)
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left + right)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left - right)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left * right)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(number)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}
// Execute the binary and get the output.
let (stdout, stderr) = execute(binary: "/usr/bin/ls", arguments: ["-l"])
// Print the output.
print(stdout)
```return (output?? "", "") // cannot convert return expression of type '(String?, String, String)' to return type '(String, String)'return (output?? "", "") // expected ',' separatorreturn (output?? "", "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output!, "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output!, "")
}
``` // XCTAssertTrue failedfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
let pipe2 = Pipe()
task.standardError = pipe2
task.launch()
let data2 = pipe2.fileHandleForReading.readDataToEndOfFile()
let error = String(data: data2, encoding:.utf8)
return (output?? "", error?? "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
let pipe2 = Pipe()
task.standardError = pipe2
task.launch()
let data2 = pipe2.fileHandleForReading.readDataToEndOfFile()
let error = String(data: data2, encoding:.utf8)
return (output?? "", error?? "")
}
// Example usage
let (stdout, stderr) = execute(binary: "/path/to/binary", arguments: ["arg1", "arg2"])
print("stdout: \(stdout)")
print("stderr: \(stderr)")
```return (output?? "", error?? "") // cannot convert return expression of type '(String?, String, String?)' to return type '(String, String)'return (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'return (output?? "", error?? "") // expected ',' separatorreturn (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}
// Example usage:
let (stdout, stderr) = execute(binary: "/usr/bin/ls", arguments: ["-l"])
```return (output?? "", "") // expected ',' separatorreturn (output?? "", "") // cannot convert return expression of type '(String?, String, String)' to return type '(String, String)'return (output?? "", "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary with arguments and return exit code.
func execute(binary: String, arguments: [String]) -> Int32 {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.launch()
task.waitUntilExit()
return task.terminationStatus
}
// Function to execute binary withreturn (output?? "", "") // expected ',' separatorreturn (output?? "", "") // cannot convert return expression of type '(String?, String, String)' to return type '(String, String)'return (output?? "", "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)?? ""
return (output, error)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)?? ""
return (output, error)
}
// Execute binary with arguments.
let (output, error) = execute(binary: "/usr/bin/ls", arguments: ["-l"])
print(output)
print(error)
```let output = String(data: data, encoding:.utf8)?? "" // string literal is unusedlet output = String(data: data, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'let output = String(data: data, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let error = String(data: errorData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let error = String(data: errorData, encoding:.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return stderr.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
```func execute(binary: String, arguments: [String]) -> String { // invalid redeclaration of 'execute(binary:arguments:)'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)
return (output?? "", "")
}
// Example usage:
let (stdout, stderr) = execute(binary: "/path/to/binary", arguments: ["arg1", "arg2"])
```return (output?? "", "") // expected ',' separatorreturn (output?? "", "") // cannot convert return expression of type '(String?, String, String)' to return type '(String, String)'return (output?? "", "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return stderr.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return both stdout and stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return stderr.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return both stdout and stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return (output!, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return stderr.
func execute(binary: String, arguments: [String]) -> String {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
return output!
}
// Function to execute binary with arguments and return both stdout and stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = argumentsfunc execute(binary: String, arguments: [String]) -> String { // invalid redeclaration of 'execute(binary:arguments:)'func execute(binary: String, arguments: [String]) -> (String, String) { // invalid redeclaration of 'execute(binary:arguments:)'func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let value = cache[arg] {
return value
} else {
let value = function(arg)
cache[arg] = value
return value
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let value = cache[arg] {
return value
} else {
let value = function(arg)
cache[arg] = value
return value
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let value = cache[arg] {
return value
} else {
let value = function(arg)
cache[arg] = value
return value
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let value = cache[arg] {
return value
} else {
let value = function(arg)
cache[arg] = value
return value
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
```return try retry(attempts: attempts, task: task, handler: { _ in }) // extra argument 'handler' in callfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
```return try retry(attempts: attempts, task: task, handler: { _ in }) // extra argument 'handler' in callfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
handler(error)
}
} while attempts > 0
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
handler(error)
}
} while attempts > 0
throw error
}
```throw error // thrown expression type '(String) -> ()' does not conform to 'Error'throw error // expansion of macro 'error' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
```return try retry(attempts: attempts, task: task, handler: { _ in }) // extra argument 'handler' in callfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
handler(error)
}
} while attempts > 0
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
handler(error)
}
} while attempts > 0
throw error
}
```throw error // thrown expression type '(String) -> ()' does not conform to 'Error'throw error // expansion of macro 'error' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> // Fatal error: Error raised at top level: Error Domain=TestError Code=1 "(null)"func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
attempts -= 1
handler(error)
}
} while attempts > 0
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
attempts -= 1
handler(error)
}
} while attempts > 0
throw error
}
```throw error // expansion of macro 'error' requires leading '#'throw error // thrown expression type '(String) -> ()' does not conform to 'Error'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try task()
}
``` // Fatal error: Error raised at top level: Error Domain=TestError Code=1 "(null)"func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
attempts -= 1
if attempts > 0 {
handler(error)
}
}
} while attempts > 0
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
var attempts = attempts
repeat {
do {
return try task()
} catch {
attempts -= 1
if attempts > 0 {
handler(error)
}
}
} while attempts > 0
throw error
}
```throw error // thrown expression type '(String) -> ()' does not conform to 'Error'throw error // expansion of macro 'error' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
for _ in 0..<attempts {
do {
return try task()
} catch {
handler(error)
}
}
throw Error.maxAttemptsReached
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
return try retry(attempts: attempts, task: task, handler: { _ in })
}
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T, handler: @escaping (Error) -> Void) throws -> T {
for _ in 0..<attempts {
do {
return try task()
} catch {
handler(error)
}
}
throw Error.maxAttemptsReached
}
```throw Error.maxAttemptsReached // type 'any Error' has no member 'maxAttemptsReached'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeName = String(describing: type)
factories[typeName] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeName = String(describing: type)
return factories[typeName] == nil? nil : factories[typeName]!() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeName = String(describing: type)
factories[typeName] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeName = String(describing: type)
return factories[typeName] == nil? nil : factories[typeName]!() as? T
}
}
```return factories[typeName] == nil? nil : factories[typeName]!() as? T // 'nil' requires a contextual typereturn factories[typeName] == nil? nil : factories[typeName]!() as? T // cannot convert return expression of type 'Bool' to return type 'T?'return factories[typeName] == nil? nil : factories[typeName]!() as? T // expected expressionreturn factories[typeName] == nil? nil : factories[typeName]!() as? T // cannot convert value of type '(() -> Any)?' to expected argument type '(any Any.Type)?'return factories[typeName] == nil? nil : factories[typeName]!() as? T // consecutive statements on a line must be separated by ';'return factories[typeName] == nil? nil : factories[typeName]!() as? T // consecutive statements on a line must be separated by ';'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'guard let factory = factories[type] as? () -> T else { // cast from '(key: AnyHashable, value: Any)' to unrelated type '() -> T' always failsguard let factory = factories[type] as? () -> T else { // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, Any>.Index'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'guard let factory = factories[type] as? () -> T else { // cast from '(key: AnyHashable, value: Any)' to unrelated type '() -> T' always failsguard let factory = factories[type] as? () -> T else { // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, Any>.Index'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}
class MyClass {
private let container: DIContainerProtocol
init(container: DIContainerProtocol) {
self.container = container
}
func doSomething() {
let service = container.resolve(MyService.self)
service?.doSomething()
}
}
class MyService {
func doSomething() {
print("do something")
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}
// Example of using DI container.
class MyClass {
private let container: DIContainerProtocol
init(container: DIContainerProtocol) {
self.container = container
}
func doSomething() {
let service = container.resolve(MyService.self)
service?.doSomething()
}
}
class MyService {
func doSomething() {
print("do something")
}
}
let container = DIContainer()
container.register(MyService.self, factory: { MyService() })
let myClass = MyClass(container: container)
myClass.doSomething()
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'guard let factory = factories[type] as? () -> T else { // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, () -> Any>.Index'guard let factory = factories[type] as? () -> T else { // cast from '(key: AnyHashable, value: () -> Any)' to unrelated type '() -> T' always failsprotocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else {
return nil
}
return factory()
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'guard let factory = factories[type] as? () -> T else { // cast from '(key: AnyHashable, value: Any)' to unrelated type '() -> T' always failsguard let factory = factories[type] as? () -> T else { // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, Any>.Index'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else { return nil }
return factory()
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[type] as? () -> T else { return nil }
return factory()
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'guard let factory = factories[type] as? () -> T else { return nil } // cast from '(key: AnyHashable, value: () -> Any)' to unrelated type '() -> T' always failsguard let factory = factories[type] as? () -> T else { return nil } // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, () -> Any>.Index'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
return factories[key] as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
return factories[key] as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
if let factory = factories[type] as? () -> T {
return factory()
}
return nil
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
if let factory = factories[type] as? () -> T {
return factory()
}
return nil
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'if let factory = factories[type] as? () -> T { // cast from '(key: AnyHashable, value: () -> Any)' to unrelated type '() -> T' always failsif let factory = factories[type] as? () -> T { // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, () -> Any>.Index'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
return factories[type] as? () -> T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [AnyHashable: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
return factories[type] as? () -> T
}
}
```factories[type] = factory // argument type 'T.Type' does not conform to expected type 'Hashable'return factories[type] as? () -> T // cannot convert value of type 'T.Type' to expected argument type 'Dictionary<AnyHashable, () -> Any>.Index'return factories[type] as? () -> T // cast from '(key: AnyHashable, value: () -> Any)' to unrelated type '() -> T' always failsreturn factories[type] as? () -> T // cannot convert return expression of type '(() -> T)?' to return type 'T?'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
return factories[ObjectIdentifier(type)]?() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
return factories[ObjectIdentifier(type)]?() as? T
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = to
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'var state: State { // invalid redeclaration of 'state'self.state = nextState // cannot assign value of type '()' to type 'State'transitions[from]?[to]?[event] = to // cannot assign value of type 'State' to subscript of type '()'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: State]]] = [:]
private var state: State
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition from \(state) to \(event)")
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]?[to] = transitions[from]?[to]?? [:]
transitions[from]?[to]?[event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: State]]] = [:]
private var state: State
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition from \(state) to \(event)")
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]?[to] = transitions[from]?[to]?? [:]
transitions[from]?[to]?[event] = to
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'var state: State { // invalid redeclaration of 'state'transitions[from] = transitions[from]?? [:] // cannot use optional chaining on non-optional value of type '[State : [Event : State]]'transitions[from] = transitions[from]?? [:] // missing argument for parameter #1 in subscripttransitions[from] = transitions[from]?? [:] // expected expression in list of expressionstransitions[from]?[to] = transitions[from]?[to]?? [:] // missing argument for parameter #1 in subscripttransitions[from]?[to] = transitions[from]?[to]?? [:] // expected expression in list of expressionstransitions[from]?[to] = transitions[from]?[to]?? [:] // cannot use optional chaining on non-optional value of type '[Event : State]'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: State]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]![to] = transitions[from]![to]?? [:]
transitions[from]![to]![event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: State]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]![to] = transitions[from]![to]?? [:]
transitions[from]![to]![event] = to
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'transitions[from] = transitions[from]?? [:] // cannot use optional chaining on non-optional value of type '[State : [Event : State]]'transitions[from] = transitions[from]?? [:] // missing argument for parameter #1 in subscripttransitions[from] = transitions[from]?? [:] // expected expression in list of expressionstransitions[from]![to] = transitions[from]![to]?? [:] // expected expression in list of expressionstransitions[from]![to] = transitions[from]![to]?? [:] // cannot use optional chaining on non-optional value of type '[Event : State]'transitions[from]![to] = transitions[from]![to]?? [:] // missing argument for parameter #1 in subscriptprotocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [Event: State]] = [:]
private var eventHandlers: [Event: (State) -> Void] = [:]
required init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
eventHandlers[event]?(state)
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]![event] = to
}
func registerEventHandler(for event: Event, handler: @escaping (State) -> Void) {
eventHandlers[event] = handler
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [Event: State]] = [:]
private var eventHandlers: [Event: (State) -> Void] = [:]
required init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
eventHandlers[event]?(state)
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]![event] = to
}
func registerEventHandler(for event: Event, handler: @escaping (State) -> Void) {
eventHandlers[event] = handler
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'transitions[from] = transitions[from]?? [:] // cannot use optional chaining on non-optional value of type '[Event : State]'transitions[from] = transitions[from]?? [:] // missing argument for parameter #1 in subscripttransitions[from] = transitions[from]?? [:] // expected expression in list of expressionsprotocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition found for state: \(state) and event: \(event)")
}
state = nextState()
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = { [weak self] in
self?.state = to
}
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition found for state: \(state) and event: \(event)")
}
state = nextState()
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = { [weak self] in
self?.state = to
}
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'var state: State { // invalid redeclaration of 'state'state = nextState() // cannot call value of non-function type '()'transitions[from]?[to]?[event] = { [weak self] in // function produces expected type '()?'; did you mean to call it with '()'?protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let transition = transitions[state]?[state]?[event] else {
return
}
transition()
state = state
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = { [weak self] in
self?.state = to
}
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
required init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let transition = transitions[state]?[state]?[event] else {
return
}
transition()
state = state
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = { [weak self] in
self?.state = to
}
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'var state: State { // invalid redeclaration of 'state'transition() // cannot call value of non-function type '()'state = state // assigning a property to itselftransitions[from]?[to]?[event] = { [weak self] in // function produces expected type '()?'; did you mean to call it with '()'?protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
private var transitionQueue: [State: [State: [Event: ()]]] = [:]
required init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let transition = transitions[state]?[event] else {
return
}
transition()
state = event
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = nil
transitionQueue[from]?[to]?[event] = nil
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void) {
transitions[from]?[to]?[event] = transition
transitionQueue[from]?[to]?[event] = transition
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void, queue: DispatchQueue) {
transitions[from]?[to]?[event] = transition
transitionQueue[from]?[to]?[event] = transition
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event) {
queue.async {
self.trigger(event: event)
}
}
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void) {
registerTransition(from: from, to: to, event: event) {
queue.async {
transition()
self.trigger(event: event)
}
}
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event) {
queue.async {
transition()
self.trigger(event: event)
}
}
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: DispatchQueue.main)
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue)
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue, queue: DispatchQueue.main)
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue, queue: queue)
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue, queue: DispatchQueue.main)
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue, queue: queue)
}
func registerTransition(from: State, to: State, event: Event, transition: @escaping () -> Void, queue: DispatchQueue, transition: @escaping () -> Void) {
registerTransition(from: from, to: to, event: event, transition: transition, queue: queue, transition: transition, queue: DispatchQueue.main)
}
func registerTransition(from: State, to: State, event: Event, queue: DispatchQueue, transition: @escaping () -> Void, transition: @escaping () -> Void, queue: DispatchQueue) {
registerTransition(from: from, to: tolet stateMachine = StateMachine<TrafficLightState, TrafficLightEvent>(state: .green) // cannot infer contextual base in reference to member 'green'let stateMachine = StateMachine<TrafficLightState, TrafficLightEvent>(state: .green) // cannot find 'StateMachine' in scopestateMachine.registerTransition(from: .red, to: .green, event: .timer) // cannot infer contextual base in reference to member 'timer'stateMachine.registerTransition(from: .red, to: .green, event: .timer) // cannot infer contextual base in reference to member 'green'stateMachine.registerTransition(from: .red, to: .green, event: .timer) // cannot infer contextual base in reference to member 'red'stateMachine.registerTransition(from: .green, to: .yellow, event: .timer) // cannot infer contextual base in reference to member 'green'stateMachine.registerTransition(from: .green, to: .yellow, event: .timer) // cannot infer contextual base in reference to member 'yellow'stateMachine.registerTransition(from: .green, to: .yellow, event: .timer) // cannot infer contextual base in reference to member 'timer'stateMachine.registerTransition(from: .yellow, to: .red, event: .timer) // cannot infer contextual base in reference to member 'yellow'stateMachine.registerTransition(from: .yellow, to: .red, event: .timer) // cannot infer contextual base in reference to member 'red'stateMachine.registerTransition(from: .yellow, to: .red, event: .timer) // cannot infer contextual base in reference to member 'timer'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'stateMachine.trigger(event: .timer) // cannot infer contextual base in reference to member 'timer'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'stateMachine.trigger(event: .timer) // cannot infer contextual base in reference to member 'timer'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'stateMachine.trigger(event: .timer) // cannot infer contextual base in reference to member 'timer'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
private var transitionQueue: [(State, State, Event)] = []
required init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition registered for state \(state) and event \(event)")
}
state = nextState
transitionQueue.removeAll()
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = ()
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var state: State
private var transitions: [State: [State: [Event: ()]]] = [:]
private var transitionQueue: [(State, State, Event)] = []
required init(state: State) {
self.state = state
}
var currentState: State {
return state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
fatalError("No transition registered for state \(state) and event \(event)")
}
state = nextState
transitionQueue.removeAll()
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = ()
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'state = nextState // cannot assign value of type '()' to type 'State'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]?[to] = transitions[from]?[to]?? [:]
transitions[from]?[to]?[event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from] = transitions[from]?? [:]
transitions[from]?[to] = transitions[from]?[to]?? [:]
transitions[from]?[to]?[event] = to
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'var state: State { // invalid redeclaration of 'state'state = nextState // cannot assign value of type '()' to type 'State'transitions[from] = transitions[from]?? [:] // expected expression in list of expressionstransitions[from] = transitions[from]?? [:] // missing argument for parameter #1 in subscripttransitions[from] = transitions[from]?? [:] // cannot use optional chaining on non-optional value of type '[State : [Event : ()]]'transitions[from]?[to] = transitions[from]?[to]?? [:] // cannot use optional chaining on non-optional value of type '[Event : ()]'transitions[from]?[to] = transitions[from]?[to]?? [:] // expected expression in list of expressionstransitions[from]?[to] = transitions[from]?[to]?? [:] // missing argument for parameter #1 in subscripttransitions[from]?[to]?[event] = to // cannot assign value of type 'State' to subscript of type '()'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [State: [State: [Event: ()]]] = [:]
private var state: State
init(state: State) {
self.state = state
}
var state: State {
return self.state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[state]?[event] else {
return
}
self.state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from]?[to]?[event] = to
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'var state: State { // invalid redeclaration of 'state'self.state = nextState // cannot assign value of type '()' to type 'State'transitions[from]?[to]?[event] = to // cannot assign value of type 'State' to subscript of type '()'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
// File system manager implementation.
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}
```case let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
let fileSystem = FileSystemNode.directory(name: "root", contents: [
.directory(name: "dir1", contents: [
.file(name: "file1", size: 10),
.file(name: "file2", size: 20),
.file(name: "file3", size: 30),
]),
.directory(name: "dir2", contents: [
.file(name: "file4", size: 40),
.file(name: "file5", size: 50),
.file(name: "file6", size: 60),
]),
.file(name: "file7", size: 70),
.file(name: "file8", size: 80),
.file(name: "file9", size: 90),
])
print(fileSystem.totalSize) // 300
print(fileSystem.filesCount) // 10
print(fileSystem.treeDepth) // 3
```case let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.file(_, _): // 'let' pattern has no effect; sub-pattern didn't bind any variablescase let.file(_, _): // 'let' pattern has no effect; sub-pattern didn't bind any variablesreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
```case let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
static func build(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node builder.
extension FileSystemNode {
static func build(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
class FileSystemManager {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func createFile(name: String, size: Int) -> FileSystemNode {
let file = FileSystemNode.file(name: name, size: size)
return root.directory(name: root.name, contents: root.contents + [file])
}
func createDirectory(name: String) -> FileSystemNode {
let directory = FileSystemNode.directory(name: name, contents: [])
return root.directory(name: root.name, contents: root.contents + [directory])
}
func deleteFile(name: String) -> FileSystemNode {
let file = FileSystemNode.file(name: name, size: 0)
return root.directory(name: root.name, contents: root.contents.filter { $0!= file })
}
func deleteDirectory(name: String) -> FileSystemNode {
let directory = FileSystemNode.directory(name: name, contents: [])
return root.directory(name: root.name, contents: root.contents.filter { $0!= directory })
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
// File system manager.
// Used to create and delete files and directories.
class FileSystemManager {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func createFile(name: String, size: Int) -> FileSystemNode {
let file = FileSystemNode.file(name: name, size: size)
return root.directory(name: root.name, contents: root.contents + [file])
}
func createDirectory(name: String) -> FileSystemNode {
let directory = FileSystemNode.directory(name: name, contents: [])
return root.directory(name: root.name, contents: root.contents + [directory])
}
func deleteFile(name: String) -> FileSystemNode {
let file = FileSystemNode.file(name: name, size: 0)
return root.directory(name: root.name, contents: root.contents.filter { $0!= file })
}
func deleteDirectory(name: String) -> FileSystemNode {
let directory = FileSystemNode.directory(name: name, contents: [])
return root.directory(name: root.name, contents: root.contents.filter { $0!= directory })
}
}
// File system manager test.
let root = FileSystemNode.directory(name: "root", contents: [])
let fileSystemManager = FileSystemManager(root: root)
let fileSystemNode = fileSystemManager.createFile(name: "file1", size: 10)
let fileSystemNode2 = fileSystemManager.createFile(name: "file2", size: 20)
let fileSystemNode3 = fileSystemManager.createFile(name: "file3", size: 30)
let fileSystemNode4 = fileSystemManager.createDirectory(name: "dir1")
let fileSystemNode5 = fileSystemManager.createDirectory(name: "dir2")
let fileSystemNode6 = fileSystemManager.createDirectory(name: "dir3")
let fileSystemNode7 = fileSystemManager.deleteFile(name: "file1")
let fileSystemNode8 = fileSystemManager.deleteDirectory(name: "dir1")
print(fileSystemNode.totalSize) // 40
print(fileSystemNode2.totalSize) // 20
print(fileSystemNode3.totalSize) // 30
print(fileSystemNode4.totalSize) // 0
print(fileSystemNode5.totalSize) // 0
print(fileSystemNode6.totalSize) // 0
print(fileSystemNode.filesCount) // 1
print(fileSystemNode2.filesCount) // 1
print(fileSystemNode3.filesCount) // 1
print(fileSystemNode4.filesCount) // 0
print(fileSystemNode5.filesCount) // 0
print(fileSystemNode6.filesCount) // 0
print(fileSystemNode.treeDepth) // 1
print(fileSystemNode2.treeDepth) // 1
print(fileSystemNode3.treeDepth) // 1
print(fileSystemNode4.treeDepth) // 2
print(fileSystemNode5.treeDepth) // 2
print(fileSystemNode6.treeDepth) // 2
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn root.directory(name: root.name, contents: root.contents + [file]) // value of type 'FileSystemNode' has no member 'contents'return root.directory(name: root.name, contents: root.contents + [file]) // value of type 'FileSystemNode' has no member 'name'return root.directory(name: root.name, contents: root.contents + [file]) // enum case 'directory' cannot be used as an instance memberreturn root.directory(name: root.name, contents: root.contents + [directory]) // value of type 'FileSystemNode' has no member 'name'return root.directory(name: root.name, contents: root.contents + [directory]) // value of type 'FileSystemNode' has no member 'contents'return root.directory(name: root.name, contents: root.contents + [directory]) // enum case 'directory' cannot be used as an instance memberreturn root.directory(name: root.name, contents: root.contents.filter { $0!= file }) // value of type 'FileSystemNode' has no member 'contents'return root.directory(name: root.name, contents: root.contents.filter { $0!= file }) // enum case 'directory' cannot be used as an instance memberreturn root.directory(name: root.name, contents: root.contents.filter { $0!= file }) // cannot assign through '!': '$0' is immutablereturn root.directory(name: root.name, contents: root.contents.filter { $0!= file }) // '=' must have consistent whitespace on both sidesreturn root.directory(name: root.name, contents: root.contents.filter { $0!= file }) // value of type 'FileSystemNode' has no member 'name'return root.directory(name: root.name, contents: root.contents.filter { $0!= directory }) // '=' must have consistent whitespace on both sidesreturn root.directory(name: root.name, contents: root.contents.filter { $0!= directory }) // enum case 'directory' cannot be used as an instance memberreturn root.directory(name: root.name, contents: root.contents.filter { $0!= directory }) // cannot assign through '!': '$0' is immutablereturn root.directory(name: root.name, contents: root.contents.filter { $0!= directory }) // value of type 'FileSystemNode' has no member 'name'return root.directory(name: root.name, contents: root.contents.filter { $0!= directory }) // value of type 'FileSystemNode' has no member 'contents'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}
class FileSystemNodeFactory {
func createFile(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
func createDirectory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
class FileSystemNodeFactoryImpl: FileSystemNodeFactory {
func createFile(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
func createDirectory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
class FileSystemManagerFactory {
func create(root: FileSystemNode) -> FileSystemManager {
return FileSystemManager(root: root)
}
}
class FileSystemManagerFactoryImpl: FileSystemManagerFactory {
func create(root: FileSystemNode) -> FileSystemManager {
return FileSystemManager(root: root)
}
}
class FileSystemNodeFactoryFactory {
func create() -> FileSystemNodeFactory {
return FileSystemNodeFactoryImpl()
}
}
class FileSystemNodeFactoryFactoryImpl: FileSystemNodeFactoryFactory {
func create() -> FileSystemNodeFactory {
return FileSystemNodeFactoryImpl()
}
}
class FileSystemManagerFactoryFactory {
func create() -> FileSystemManagerFactory {
return FileSystemManagerFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryImpl: FileSystemManagerFactoryFactory {
func create() -> FileSystemManagerFactory {
return FileSystemManagerFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactory {
return FileSystemManagerFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactory {
return FileSystemManagerFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryImpl()
}
}
class FileSystemManagerFactoryFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryFactoryImpl()
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
// File system manager implementation.
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}
// File system node factory.
class FileSystemNodeFactory {
func createFile(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
func createDirectory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system node factory implementation.
class FileSystemNodeFactoryImpl: FileSystemNodeFactory {
func createFile(name: String, size: Int) -> FileSystemNode {
return.file(name: name, size: size)
}
func createDirectory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
return.directory(name: name, contents: contents)
}
}
// File system manager factory.
class FileSystemManagerFactory {
func create(root: FileSystemNode) -> FileSystemManager {
return FileSystemManager(root: root)
}
}
// File system manager factory implementation.
class FileSystemManagerFactoryImpl: FileSystemManagerFactory {
func create(root: FileSystemNode) -> FileSystemManager {
return FileSystemManager(root: root)
}
}
// File system node factory factory.
class FileSystemNodeFactoryFactory {
func create() -> FileSystemNodeFactory {
return FileSystemNodeFactoryImpl()
}
}
// File system node factory factory implementation.
class FileSystemNodeFactoryFactoryImpl: FileSystemNodeFactoryFactory {
func create() -> FileSystemNodeFactory {
return FileSystemNodeFactoryImpl()
}
}
// File system manager factory factory.
class FileSystemManagerFactoryFactory {
func create() -> FileSystemManagerFactory {
return FileSystemManagerFactoryImpl()
}
}
// File system manager factory factory implementation.
class FileSystemManagerFactoryFactoryImpl: FileSystemManagerFactoryFactory {
func create() -> FileSystemManagerFactory {
return FileSystemManagerFactoryImpl()
}
}
// File system manager factory factory factory.
class FileSystemManagerFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactory {
return FileSystemManagerFactoryFactoryImpl()
}
}
// File system manager factory factory factory implementation.
class FileSystemManagerFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactory {
return FileSystemManagerFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory.
class FileSystemManagerFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory implementation.
class FileSystemManagerFactoryFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory factory.
class FileSystemManagerFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory factory implementation.
class FileSystemManagerFactoryFactoryFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory factory factory.
class FileSystemManagerFactoryFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactoryFactory {
return FileSystemManagerFactoryFactoryFactoryFactoryFactoryImpl()
}
}
// File system manager factory factory factory factory factory factory implementation.
class FileSystemManagerFactoryFactoryFactoryFactoryFactoryFactoryImpl: FileSystemManagerFactoryFactoryFactoryFactoryFactoryFactory {
func create() -> FileSystemManagerFactoryFactoryFactoryFactoryFactory {
return FileSystemcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itfunc createFile(name: String, size: Int) -> FileSystemNode { // overriding declaration requires an 'override' keywordfunc createDirectory(name: String, contents: [FileSystemNode]) -> FileSystemNode { // overriding declaration requires an 'override' keywordfunc create(root: FileSystemNode) -> FileSystemManager { // overriding declaration requires an 'override' keywordfunc create() -> FileSystemNodeFactory { // overriding declaration requires an 'override' keywordfunc create() -> FileSystemManagerFactory { // overriding declaration requires an 'override' keywordfunc create() -> FileSystemManagerFactoryFactory { // overriding declaration requires an 'override' keywordfunc create() -> FileSystemManagerFactoryFactoryFactory { // overriding declaration requires an 'override' keywordfunc create() -> FileSystemManagerFactoryFactoryFactoryFactory { // overriding declaration requires an 'override' keywordindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(name, contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
let fileSystem = FileSystemNode.directory(name: "root", contents: [
.directory(name: "dir1", contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(name: "dir2", contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(name: "dir3", contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600),
.directory(name: "dir4", contents: [
.file(name: "file7", size: 700),
.file(name: "file8", size: 800),
.directory(name: "dir5", contents: [
.file(name: "file9", size: 900),
.file(name: "file10", size: 1000),
.directory(name: "dir6", contents: [
.file(name: "file11", size: 1100),
.file(name: "file12", size: 1200),
.directory(name: "dir7", contents: [
.file(name: "file13", size: 1300),
.file(name: "file14", size: 1400),
.directory(name: "dir8", contents: [
.file(name: "file15", size: 1500),
.file(name: "file16", size: 1600),
.directory(name: "dir9", contents: [
.file(name: "file17", size: 1700),
.file(name: "file18", size: 1800),
.directory(name: "dir10", contents: [
.file(name: "file19", size: 1900),
.file(name: "file20", size: 2000),
])
])
])
])
])
])
])
])
])
])
])
let fileSystemInfo = fileSystem.calculateFileSystemInfo()
print("Total size: \(fileSystemInfo.totalSize)")
print("Files count: \(fileSystemInfo.filesCount)")
print("Tree depth: \(fileSystemInfo.treeDepth)")
```case let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(name, size):
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file(name, size):
return 1
case let.directory(name, contents):
return max(contents.map { $0.treeDepth }, 0).successor()
}
}
}
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(name, size):
return 1
case let.directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file(name, size):
return 1
case let.directory(name, contents):
return max(contents.map { $0.treeDepth }, 0).successor()
}
}
}
// File system manager implementation.
class FileSystemManager {
private let root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
return root.totalSize
}
func filesCount() -> Int {
return root.filesCount
}
func treeDepth() -> Int {
return root.treeDepth
}
}
```case let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.file(name, size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn max(contents.map { $0.treeDepth }, 0).successor() // value of type 'Int' has no member 'successor'return max(contents.map { $0.treeDepth }, 0).successor() // cannot convert value of type '[Int]' to expected argument type 'Int'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.map(\.totalSize).reduce(0, +)
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.map(\.filesCount).reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return 1 + contents.map(\.treeDepth).max()?? 0
}
}
}
struct FileSystemManager {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
root.totalSize
}
func filesCount() -> Int {
root.filesCount
}
func treeDepth() -> Int {
root.treeDepth
}
}
struct FileSystemTreeBuilder {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func build() -> FileSystemNode {
root
}
}
struct FileSystemTreePrinter {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
struct FileSystemTreePrinterWithInfo {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
struct FileSystemTreePrinterWithInfoAndManager {
private var root: FileSystemNode
private var manager: FileSystemManager
init(root: FileSystemNode, manager: FileSystemManager) {
self.root = root
self.manager = manager
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
struct FileSystemTreePrinterWithInfoAndManagerAndBuilder {
private var root: FileSystemNode
private var manager: FileSystemManager
private var builder: FileSystemTreeBuilder
init(root: FileSystemNode, manager: FileSystemManager, builder: FileSystemTreeBuilder) {
self.root = root
self.manager = manager
self.builder = builder
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(name, size):
return size
case let.directory(name, contents):
return contents.map(\.totalSize).reduce(0, +)
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.map(\.filesCount).reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return 1 + contents.map(\.treeDepth).max()?? 0
}
}
}
// File system manager implementation.
struct FileSystemManager {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func totalSize() -> Int {
root.totalSize
}
func filesCount() -> Int {
root.filesCount
}
func treeDepth() -> Int {
root.treeDepth
}
}
// File system tree builder.
// Used to build file system tree from file system nodes.
struct FileSystemTreeBuilder {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func build() -> FileSystemNode {
root
}
}
// File system tree printer.
// Used to print file system tree.
struct FileSystemTreePrinter {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
// File system tree printer with file system info.
// Used to print file system tree with file system info.
struct FileSystemTreePrinterWithInfo {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
// File system tree printer with file system info and file system manager.
// Used to print file system tree with file system info and file system manager.
struct FileSystemTreePrinterWithInfoAndManager {
private var root: FileSystemNode
private var manager: FileSystemManager
init(root: FileSystemNode, manager: FileSystemManager) {
self.root = root
self.manager = manager
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
// File system tree printer with file system info and file system manager and file system tree builder.
// Used to print file system tree with file system info and file system manager and file system tree builder.
struct FileSystemTreePrinterWithInfoAndManagerAndBuilder {
private var root: FileSystemNode
private var manager: FileSystemManager
private var builder: FileSystemTreeBuilder
init(root: FileSystemNode, manager: FileSystemManager, builder: FileSystemTreeBuilder) {
self.root = root
self.manager = manager
self.builder = builder
}
func print() {
print(root)
}
private func print(_ node: FileSystemNode, depth: Int = 0) {
switch node {
case let.file(name, size):
print(depth, name, size)
case let.directory(name, contents):
print(depth, name)
contents.forEach { print($0, depth: depth + 1) }
}
}
}
// File system tree printer with file system info and file system manager and file system tree builder and file system tree printer.
// Used to print file system tree with file systemcase let.file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let.file(_, _): // 'let' pattern has no effect; sub-pattern didn't bind any variablescase let.file(_, _): // 'let' pattern has no effect; sub-pattern didn't bind any variablesreturn 1 + contents.map(\.treeDepth).max()?? 0 // consecutive statements on a line must be separated by ';'return 1 + contents.map(\.treeDepth).max()?? 0 // integer literal is unusedreturn 1 + contents.map(\.treeDepth).max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map(\.treeDepth).max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'print(depth, name, size) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name, size) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name, size) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name, size) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'print(depth, name) // use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<T>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<T>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<T>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<T>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
private var elements:init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack13<Element>'init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack14<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var elements = [Element]()
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Genericinit() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
queue.append(key)
} else {
cache.removeValue(forKey: key)
queue = queue.filter { $0!= key }
}
}
}
func removeLeastRecentlyUsed() -> Key? {
guard!queue.isEmpty else { return nil }
let key = queue.removeFirst()
cache.removeValue(forKey: key)
return key
}
func removeLeastRecentlyUsed(count: Int) -> [Key] {
guard count > 0 else { return [] }
let keys = queue.prefix(count)
queue = queue.filter {!keys.contains($0) }
cache = cache.filter {!keys.contains($0.key) }
return keys.map { $0 }
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
queue.append(key)
} else {
cache.removeValue(forKey: key)
queue = queue.filter { $0!= key }
}
}
}
func removeLeastRecentlyUsed() -> Key? {
guard!queue.isEmpty else { return nil }
let key = queue.removeFirst()
cache.removeValue(forKey: key)
return key
}
func removeLeastRecentlyUsed(count: Int) -> [Key] {
guard count > 0 else { return [] }
let keys = queue.prefix(count)
queue = queue.filter {!keys.contains($0) }
cache = cache.filter {!keys.contains($0.key) }
return keys.map { $0 }
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'queue = queue.filter { $0!= key } // cannot force unwrap value of non-optional type 'Key'queue = queue.filter { $0!= key } // '=' must have consistent whitespace on both sidesguard!queue.isEmpty else { return nil } // expected expression, var, let or case in 'guard' conditionprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let newValue = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = newValue
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
if queue.count > capacity {
let last = queue.removeLast()
cache.removeValue(forKey: last)
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let newValue = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = newValue
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
if queue.count > capacity {
let last = queue.removeLast()
cache.removeValue(forKey: last)
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = value
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = value
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var accessOrder: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.accessOrder = []
}
subscript(key: Key) -> Value? {
get {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
return cache[key]
}
return nil
}
set {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
} else {
if accessOrder.count == capacity {
let key = accessOrder.removeFirst()
cache.removeValue(forKey: key)
}
accessOrder.append(key)
}
cache[key] = newValue
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var accessOrder: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.accessOrder = []
}
subscript(key: Key) -> Value? {
get {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
return cache[key]
}
return nil
}
set {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
} else {
if accessOrder.count == capacity {
let key = accessOrder.removeFirst()
cache.removeValue(forKey: key)
}
accessOrder.append(key)
}
cache[key] = newValue
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
} else if queue.count == capacity {
let key = queue.removeFirst()
cache.removeValue(forKey: key)
}
queue.append(key)
cache[key] = newValue
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
} else if queue.count == capacity {
let key = queue.removeFirst()
cache.removeValue(forKey: key)
}
queue.append(key)
cache[key] = newValue
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.append(key)
cache[key] = value
if queue.count > capacity {
let key = queue.removeFirst()
cache[key] = nil
}
} else {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
cache[key] = nil
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.append(key)
cache[key] = value
if queue.count > capacity {
let key = queue.removeFirst()
cache[key] = nil
}
} else {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
cache[key] = nil
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = value
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
}
queue.insert(key, at: 0)
cache[key] = value
} else {
cache.removeValue(forKey: key)
queue.removeAll(where: { $0 == key })
}
}
}
}
let cache = Cache<String, Int>(capacity: 10)
cache["key1"] = 1
cache["key2"] = 2
cache["key3"] = 3
cache["key4"] = 4
cache["key5"] = 5
cache["key6"] = 6
cache["key7"] = 7
cache["key8"] = 8
cache["key9"] = 9
cache["key10"] = 10
cache["key11"] = 11
cache["key12"] = 12
cache["key13"] = 13
cache["key14"] = 14
cache["key15"] = 15
cache["key16"] = 16
cache["key17"] = 17
cache["key18"] = 18
cache["key19"] = 19
cache["key20"] = 20
cache["key21"] = 21
cache["key22"] = 22
cache["key23"] = 23
cache["key24"] = 24
cache["key25"] = 25
cache["key26"] = 26
cache["key27"] = 27
cache["key28"] = 28
cache["key29"] = 29
cache["key30"] = 30
cache["key31"] = 31
cache["key32"] = 32
cache["key33"] = 33
cache["key34"] = 34
cache["key35"] = 35
cache["key36"] = 36
cache["key37"] = 37
cache["key38"] = 38
cache["key39"] = 39
cache["key40"] = 40
cache["key41"] = 41
cache["key42"] = 42
cache["key43"] = 43
cache["key44"] = 44
cache["key45"] = 45
cache["key46"] = 46
cache["key47"] = 47
cache["key48"] = 48
cache["key49"] = 49
cache["key50"] = 50
cache["key51"] = 51
cache["key52"] = 52
cache["key53"] = 53
cache["key54"] = 54
cache["key55"] = 55
cache["key56"] = 56
cache["key57"] = 57
cache["key58"] = 58
cache["key59"] = 59
cache["key60"] = 60
cache["key61"] = 61
cache["key62"] = 62
cache["key63"] = 63
cache["key64"] = 64
cache["key65"] = 65
cache["key66"] = 66
cache["key67"] = 67
cache["key68"] = 68
cache["key69"] = 69
cache["key70"] = 70
cache["key71"] = 71
cache["key72"] = 72
cache["key73"] = 73
cache["key74"] = 74
cache["key75"] = 75
cache["key76"] = 76
cache["key77"] = 77
cacheinit(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var lru: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.lru = []
}
subscript(key: Key) -> Value? {
get {
if let value = cache[key] {
lru.remove(at: lru.firstIndex(of: key)!)
lru.append(key)
return value
} else {
return nil
}
}
set {
if let value = newValue {
if cache.count == capacity {
let key = lru.removeFirst()
cache.removeValue(forKey: key)
}
cache[key] = value
lru.append(key)
} else {
cache.removeValue(forKey: key)
lru.remove(at: lru.firstIndex(of: key)!)
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Value>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Value]
private var lru: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.lru = []
}
subscript(key: Key) -> Value? {
get {
if let value = cache[key] {
lru.remove(at: lru.firstIndex(of: key)!)
lru.append(key)
return value
} else {
return nil
}
}
set {
if let value = newValue {
if cache.count == capacity {
let key = lru.removeFirst()
cache.removeValue(forKey: key)
}
cache[key] = value
lru.append(key)
} else {
cache.removeValue(forKey: key)
lru.remove(at: lru.firstIndex(of: key)!)
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
queue.append(key)
} else {
cache.removeValue(forKey: key)
queue = queue.filter { $0!= key }
}
}
}
func removeLeastRecentlyUsed() -> Key? {
guard let key = queue.first else { return nil }
queue.removeFirst()
return key
}
func removeLeastRecentlyUsed(count: Int) -> [Key] {
guard count > 0 else { return [] }
var keys = [Key]()
for _ in 0..<count {
if let key = removeLeastRecentlyUsed() {
keys.append(key)
}
}
return keys
}
func removeAll() {
cache.removeAll()
queue.removeAll()
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var queue: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.queue = []
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
queue.append(key)
} else {
cache.removeValue(forKey: key)
queue = queue.filter { $0!= key }
}
}
}
func removeLeastRecentlyUsed() -> Key? {
guard let key = queue.first else { return nil }
queue.removeFirst()
return key
}
func removeLeastRecentlyUsed(count: Int) -> [Key] {
guard count > 0 else { return [] }
var keys = [Key]()
for _ in 0..<count {
if let key = removeLeastRecentlyUsed() {
keys.append(key)
}
}
return keys
}
func removeAll() {
cache.removeAll()
queue.removeAll()
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'queue = queue.filter { $0!= key } // cannot force unwrap value of non-optional type 'Key'queue = queue.filter { $0!= key } // '=' must have consistent whitespace on both sidesprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var accessOrder: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.accessOrder = []
}
subscript(key: Key) -> Element? {
get {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
return cache[key]
}
return nil
}
set {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
} else {
if accessOrder.count == capacity {
let keyToRemove = accessOrder.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
accessOrder.append(key)
}
cache[key] = newValue
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element]
private var accessOrder: [Key]
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.accessOrder = []
}
subscript(key: Key) -> Element? {
get {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
return cache[key]
}
return nil
}
set {
if let index = accessOrder.firstIndex(of: key) {
accessOrder.remove(at: index)
accessOrder.append(key)
} else {
if accessOrder.count == capacity {
let keyToRemove = accessOrder.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
accessOrder.append(key)
}
cache[key] = newValue
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationQueue")
private var expirationTimer: DispatchSourceTimer?
private let expirationInterval: TimeInterval
private let expirationQueueLabel: String
init(expirationInterval: TimeInterval, expirationQueueLabel: String) {
self.expirationInterval = expirationInterval
self.expirationQueueLabel = expirationQueueLabel
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue.async {
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else {
return nil
}
if expiration > 0 {
cache[key] = (value, expiration - expirationInterval)
}
return value
}
private func startExpirationTimer() {
if let expirationTimer = expirationTimer {
expirationTimer.cancel()
}
expirationTimer = DispatchSource.makeTimerSource(queue: DispatchQueue(label: expirationQueueLabel))
expirationTimer?.schedule(deadline:.now() + expirationInterval, repeating: expirationInterval)
expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.cache.removeAll { (_, expiration) in
return expiration <= 0
}
}
}
expirationTimer?.resume()
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationQueue")
private var expirationTimer: DispatchSourceTimer?
private let expirationInterval: TimeInterval
private let expirationQueueLabel: String
init(expirationInterval: TimeInterval, expirationQueueLabel: String) {
self.expirationInterval = expirationInterval
self.expirationQueueLabel = expirationQueueLabel
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue.async {
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else {
return nil
}
if expiration > 0 {
cache[key] = (value, expiration - expirationInterval)
}
return value
}
private func startExpirationTimer() {
if let expirationTimer = expirationTimer {
expirationTimer.cancel()
}
expirationTimer = DispatchSource.makeTimerSource(queue: DispatchQueue(label: expirationQueueLabel))
expirationTimer?.schedule(deadline:.now() + expirationInterval, repeating: expirationInterval)
expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.cache.removeAll { (_, expiration) in
return expiration <= 0
}
}
}
expirationTimer?.resume()
}
}
```self?.cache.removeAll { (_, expiration) in // extra trailing closure passed in calllet cache = ExpirableCache<String, String>() // missing arguments for parameters 'expirationInterval', 'expirationQueueLabel' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationqueue")
private var expirationTimer: DispatchSourceTimer?
private let expirationInterval: TimeInterval
private let expirationQueueInterval: TimeInterval
private let expirationQueueTimer: DispatchSourceTimer?
private let expirationQueueTimerInterval: TimeInterval
private let expirationQueueTimerQueue: DispatchQueue
init(expirationInterval: TimeInterval = 60,
expirationQueueInterval: TimeInterval = 1,
expirationQueueTimerInterval: TimeInterval = 1,
expirationQueueTimerQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationqueuetimer")) {
self.expirationInterval = expirationInterval
self.expirationQueueInterval = expirationQueueInterval
self.expirationQueueTimerInterval = expirationQueueTimerInterval
self.expirationQueueTimerQueue = expirationQueueTimerQueue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationTimer?.cancel()
expirationTimer = nil
expirationTimer = DispatchSource.makeTimerSource(queue: expirationQueue)
expirationTimer?.schedule(deadline:.now() + expirationInterval, repeating: expirationQueueInterval)
expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueueTimer?.cancel()
self?.expirationQueueTimer = nil
self?.expirationQueueTimer = DispatchSource.makeTimerSource(queue: self?.expirationQueueTimerQueue?? DispatchQueue(label: "com.expirablecache.expirationqueuetimer"))
self?.expirationQueueTimer?.schedule(deadline:.now() + self?.expirationQueueTimerInterval?? 1, repeating: self?.expirationQueueTimerInterval?? 1)
self?.expirationQueueTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.cache.removeAll { $0.value.1 < Date().timeIntervalSince1970 }
}
}
self?.expirationQueueTimer?.resume()
}
expirationTimer?.resume()
}
func get(key: Key) -> Value? {
return cache[key]?.0
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationqueue")
private var expirationTimer: DispatchSourceTimer?
private let expirationInterval: TimeInterval
private let expirationQueueInterval: TimeInterval
private let expirationQueueTimer: DispatchSourceTimer?
private let expirationQueueTimerInterval: TimeInterval
private let expirationQueueTimerQueue: DispatchQueue
init(expirationInterval: TimeInterval = 60,
expirationQueueInterval: TimeInterval = 1,
expirationQueueTimerInterval: TimeInterval = 1,
expirationQueueTimerQueue: DispatchQueue = DispatchQueue(label: "com.expirablecache.expirationqueuetimer")) {
self.expirationInterval = expirationInterval
self.expirationQueueInterval = expirationQueueInterval
self.expirationQueueTimerInterval = expirationQueueTimerInterval
self.expirationQueueTimerQueue = expirationQueueTimerQueue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationTimer?.cancel()
expirationTimer = nil
expirationTimer = DispatchSource.makeTimerSource(queue: expirationQueue)
expirationTimer?.schedule(deadline:.now() + expirationInterval, repeating: expirationQueueInterval)
expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueueTimer?.cancel()
self?.expirationQueueTimer = nil
self?.expirationQueueTimer = DispatchSource.makeTimerSource(queue: self?.expirationQueueTimerQueue?? DispatchQueue(label: "com.expirablecache.expirationqueuetimer"))
self?.expirationQueueTimer?.schedule(deadline:.now() + self?.expirationQueueTimerInterval?? 1, repeating: self?.expirationQueueTimerInterval?? 1)
self?.expirationQueueTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.cache.removeAll { $0.value.1 < Date().timeIntervalSince1970 }
}
}
self?.expirationQueueTimer?.resume()
}
expirationTimer?.resume()
}
func get(key: Key) -> Value? {
return cache[key]?.0
}
}
// Usage example
let cache = ExpirableCache<String, String>()
cache.put(value: "value", key: "key", expiration: 10)
cache.get(key: "key") // "value"
cache.put(value: "value2", key: "key", expiration: 10)
cache.get(key: "key") // "value2"
sleep(11)
cache.get(key: "key") // nil
```self?.expirationQueueTimer = nil // cannot assign to property: 'expirationQueueTimer' is a 'let' constantself?.expirationQueueTimer = DispatchSource.makeTimerSource(queue: self?.expirationQueueTimerQueue?? DispatchQueue(label: "com.expirablecache.expirationqueuetimer")) // expected ',' separatorself?.expirationQueueTimer?.schedule(deadline:.now() + self?.expirationQueueTimerInterval?? 1, repeating: self?.expirationQueueTimerInterval?? 1) // expected ',' separatorThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)]
private let expiration: TimeInterval
private let queue = DispatchQueue(label: "ExpirableCacheQueue")
init(expiration: TimeInterval) {
self.expiration = expiration
cache = [:]
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
if let (value, expiration) = cache[key] {
if expiration > 0 && expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)]
private let expiration: TimeInterval
private let queue = DispatchQueue(label: "ExpirableCacheQueue")
init(expiration: TimeInterval) {
self.expiration = expiration
cache = [:]
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
if let (value, expiration) = cache[key] {
if expiration > 0 && expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let queue = DispatchQueue(label: "com.ExpirableCache.queue")
private let expirationPolicy: ExpirationPolicy
init(expirationPolicy: ExpirationPolicy =.fifo) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
enum ExpirationPolicy {
case fifo
case lru
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let queue = DispatchQueue(label: "com.ExpirableCache.queue")
private let expirationPolicy: ExpirationPolicy
init(expirationPolicy: ExpirationPolicy =.fifo) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
// Expiration policy.
enum ExpirationPolicy {
case fifo
case lru
}
```init(expirationPolicy: ExpirationPolicy =.fifo) { // '=' must have consistent whitespace on both sidesset { put(value: newValue, key: key, expiration: 0) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let lock = NSLock()
private let expiration: TimeInterval
private let expirationQueue = DispatchQueue(label: "com.ExpirableCache.expirationQueue")
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: expiration) }
}
func remove(key: Key) {
lock.lock()
defer { lock.unlock() }
cache.removeValue(forKey: key)
}
func removeAll() {
lock.lock()
defer { lock.unlock() }
cache.removeAll()
}
func removeExpired() {
lock.lock()
defer { lock.unlock() }
let now = Date().timeIntervalSince1970
cache = cache.filter { $0.value.1 > 0 && $0.value.1 < now }
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let lock = NSLock()
private let expiration: TimeInterval
private let expirationQueue = DispatchQueue(label: "com.ExpirableCache.expirationQueue")
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: expiration) }
}
func remove(key: Key) {
lock.lock()
defer { lock.unlock() }
cache.removeValue(forKey: key)
}
func removeAll() {
lock.lock()
defer { lock.unlock() }
cache.removeAll()
}
func removeExpired() {
lock.lock()
defer { lock.unlock() }
let now = Date().timeIntervalSince1970
cache = cache.filter { $0.value.1 > 0 && $0.value.1 < now }
}
}
// Example of usage
let cache = ExpirableCache<String, Int>(expiration: 10)
cache["key"] = 1
cache["key"] = 2
cache["key"] = 3
cache["key"] = nil
cache["key"]
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cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["key"]
cache["set { put(value: newValue, key: key, expiration: expiration) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let expirationPolicy: ExpirationPolicy
private let lock = NSLock()
init(expirationPolicy: ExpirationPolicy =.LRU) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
guard let (value, expiration) = cache[key] else { return nil }
guard expiration > 0 else { return value }
guard expiration > Date().timeIntervalSince1970 else {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
enum ExpirationPolicy {
case LRU
case LFU
case FIFO
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let expirationPolicy: ExpirationPolicy
private let lock = NSLock()
init(expirationPolicy: ExpirationPolicy =.LRU) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
guard let (value, expiration) = cache[key] else { return nil }
guard expiration > 0 else { return value }
guard expiration > Date().timeIntervalSince1970 else {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
// Expiration policy.
enum ExpirationPolicy {
case LRU
case LFU
case FIFO
}
// Example usage.
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "valueinit(expirationPolicy: ExpirationPolicy =.LRU) { // '=' must have consistent whitespace on both sidesset { put(value: newValue, key: key, expiration: 0) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let expirationPolicy: ExpirationPolicy
private let queue = DispatchQueue(label: "ExpirableCache")
init(expirationPolicy: ExpirationPolicy) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expirationPolicy.isExpired(expiration) {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
}
enum ExpirationPolicy {
case never
case absolute(TimeInterval)
case relative(TimeInterval)
func isExpired(_ expiration: TimeInterval) -> Bool {
switch self {
case.never:
return false
case.absolute(let timeInterval):
return Date().timeIntervalSince1970 >= timeInterval
case.relative(let timeInterval):
return Date().timeIntervalSince1970 + timeInterval < Date().timeIntervalSince1970
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let expirationPolicy: ExpirationPolicy
private let queue = DispatchQueue(label: "ExpirableCache")
init(expirationPolicy: ExpirationPolicy) {
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expirationPolicy.isExpired(expiration) {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
}
// Expiration policy.
enum ExpirationPolicy {
case never
case absolute(TimeInterval)
case relative(TimeInterval)
func isExpired(_ expiration: TimeInterval) -> Bool {
switch self {
case.never:
return false
case.absolute(let timeInterval):
return Date().timeIntervalSince1970 >= timeInterval
case.relative(let timeInterval):
return Date().timeIntervalSince1970 + timeInterval < Date().timeIntervalSince1970
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationPolicy' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let queue = DispatchQueue(label: "com.ExpirableCache.queue")
private let expiration: TimeInterval
private let expirationPolicy: ExpirationPolicy
init(expiration: TimeInterval, expirationPolicy: ExpirationPolicy =.fifo) {
self.expiration = expiration
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: expiration) }
}
}
enum ExpirationPolicy {
case fifo
case lru
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let queue = DispatchQueue(label: "com.ExpirableCache.queue")
private let expiration: TimeInterval
private let expirationPolicy: ExpirationPolicy
init(expiration: TimeInterval, expirationPolicy: ExpirationPolicy =.fifo) {
self.expiration = expiration
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > 0, expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: expiration) }
}
}
// Expiration policy.
enum ExpirationPolicy {
case fifo
case lru
}
```init(expiration: TimeInterval, expirationPolicy: ExpirationPolicy =.fifo) { // '=' must have consistent whitespace on both sidesset { put(value: newValue, key: key, expiration: expiration) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)]
private var expirationPolicy: ExpirationPolicy
init(expirationPolicy: ExpirationPolicy =.LRU) {
self.cache = [:]
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
guard expiration > 0 else { return value }
guard expiration > Date().timeIntervalSince1970 else {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
enum ExpirationPolicy {
case LRU
case FIFO
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)]
private var expirationPolicy: ExpirationPolicy
init(expirationPolicy: ExpirationPolicy =.LRU) {
self.cache = [:]
self.expirationPolicy = expirationPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
guard expiration > 0 else { return value }
guard expiration > Date().timeIntervalSince1970 else {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 0) }
}
}
// Expiration policy.
enum ExpirationPolicy {
case LRU
case FIFO
}
```init(expirationPolicy: ExpirationPolicy =.LRU) { // '=' must have consistent whitespace on both sidesset { put(value: newValue, key: key, expiration: 0) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let lock = NSLock()
private let expiration: TimeInterval
private let evictionPolicy: EvictionPolicy
init(expiration: TimeInterval, evictionPolicy: EvictionPolicy) {
self.expiration = expiration
self.evictionPolicy = evictionPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
if let (value, expiration) = cache[key] {
if expiration > 0 && Date().timeIntervalSince1970 > expiration {
cache.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue?? Value(), key: key, expiration: expiration) }
}
}
enum EvictionPolicy {
case LRU
case LFU
case MRU
case FIFO
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private let lock = NSLock()
private let expiration: TimeInterval
private let evictionPolicy: EvictionPolicy
init(expiration: TimeInterval, evictionPolicy: EvictionPolicy) {
self.expiration = expiration
self.evictionPolicy = evictionPolicy
}
func put(value: Value, key: Key, expiration: TimeInterval) {
lock.lock()
defer { lock.unlock() }
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
lock.lock()
defer { lock.unlock() }
if let (value, expiration) = cache[key] {
if expiration > 0 && Date().timeIntervalSince1970 > expiration {
cache.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue?? Value(), key: key, expiration: expiration) }
}
}
// Eviction policy.
enum EvictionPolicy {
case LRU
case LFU
case MRU
case FIFO
}
```set { put(value: newValue?? Value(), key: key, expiration: expiration) } // type of expression is ambiguous without a type annotationset { put(value: newValue?? Value(), key: key, expiration: expiration) } // expected ',' separatorlet cache = ExpirableCache<String, String>() // missing arguments for parameters 'expiration', 'evictionPolicy' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let keyLength = keyData.count
let dataLength = data.count
var encryptedData = Data(count: dataLength)
var keyIndex = 0
for i in 0..<dataLength {
let keyByte = keyData[keyIndex]
let dataByte = data[i]
let encryptedByte = dataByte ^ keyByte
encryptedData[i] = encryptedByte
keyIndex += 1
if keyIndex == keyLength {
keyIndex = 0
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let keyLength = keyData.count
let dataLength = data.count
var decryptedData = Data(count: dataLength)
var keyIndex = 0
for i in 0..<dataLength {
let keyByte = keyData[keyIndex]
let dataByte = data[i]
let decryptedByte = dataByte ^ keyByte
decryptedData[i] = decryptedByte
keyIndex += 1
if keyIndex == keyLength {
keyIndex = 0
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let keyLength = keyData.count
let dataLength = data.count
var encryptedData = Data(count: dataLength)
var keyIndex = 0
for i in 0..<dataLength {
let keyByte = keyData[keyIndex]
let dataByte = data[i]
let encryptedByte = dataByte ^ keyByte
encryptedData[i] = encryptedByte
keyIndex += 1
if keyIndex == keyLength {
keyIndex = 0
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let keyLength = keyData.count
let dataLength = data.count
var decryptedData = Data(count: dataLength)
var keyIndex = 0
for i in 0..<dataLength {
let keyByte = keyData[keyIndex]
let dataByte = data[i]
let decryptedByte = dataByte ^ keyByte
decryptedData[i] = decryptedByte
keyIndex += 1
if keyIndex == keyLength {
keyIndex = 0
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```encryptedData.append(&encryptedByte, length: 1) // cannot pass immutable value as inout argument: 'encryptedByte' is a 'let' constantdecryptedData.append(&decryptedByte, length: 1) // cannot pass immutable value as inout argument: 'decryptedByte' is a 'let' constantprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let data = string.data(using:.utf8)!
let encryptedData = NSMutableData(length: data.count)!
var i = 0
while i < data.count {
let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count)
encryptedData.append(&byte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData(length: data.count)!
var i = 0
while i < data.count {
let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count)
decryptedData.append(&byte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let data = string.data(using:.utf8)!
let encryptedData = NSMutableData(length: data.count)!
var i = 0
while i < data.count {
let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count)
encryptedData.append(&byte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData(length: data.count)!
var i = 0
while i < data.count {
let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count)
decryptedData.append(&byte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count) // value of type 'Data' has no member 'byte'let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count) // value of type 'Data' has no member 'byte'let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count) // value of type 'Data' has no member 'byte'let byte = data.byte(at: i) ^ keyData.byte(at: i % keyData.count) // value of type 'Data' has no member 'byte'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in stringData {
let xorByte = byte ^ keyData[i]
encryptedData.append(&xorByte, length: 1)
i += 1
if i >= keyData.count {
i = 0
}
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let xorByte = byte ^ keyData[i]
decryptedData.append(&xorByte, length: 1)
i += 1
if i >= keyData.count {
i = 0
}
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in stringData {
let xorByte = byte ^ keyData[i]
encryptedData.append(&xorByte, length: 1)
i += 1
if i >= keyData.count {
i = 0
}
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let xorByte = byte ^ keyData[i]
decryptedData.append(&xorByte, length: 1)
i += 1
if i >= keyData.count {
i = 0
}
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```encryptedData.append(&xorByte, length: 1) // cannot pass immutable value as inout argument: 'xorByte' is a 'let' constantdecryptedData.append(&xorByte, length: 1) // cannot pass immutable value as inout argument: 'xorByte' is a 'let' constantprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```encryptedData.append(&encryptedByte, length: 1) // cannot pass immutable value as inout argument: 'encryptedByte' is a 'let' constantdecryptedData.append(&decryptedByte, length: 1) // cannot pass immutable value as inout argument: 'decryptedByte' is a 'let' constantprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in stringData {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in stringData {
let keyByte = keyData[i % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(&encryptedByte, length: 1)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(&decryptedByte, length: 1)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```encryptedData.append(&encryptedByte, length: 1) // cannot pass immutable value as inout argument: 'encryptedByte' is a 'let' constantdecryptedData.append(&decryptedByte, length: 1) // cannot pass immutable value as inout argument: 'decryptedByte' is a 'let' constantprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data(count: data.count)
_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
encryptedBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { encryptedBytes in
dataBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { dataBytes in
keyBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { keyBytes in
for i in 0..<data.count {
encryptedBytes[i] = dataBytes[i] ^ keyBytes[i]
}
}
}
}
}
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
decryptedBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { decryptedBytes in
dataBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { dataBytes in
keyBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { keyBytes in
for i in 0..<data.count {
decryptedBytes[i] = dataBytes[i] ^ keyBytes[i]
}
}
}
}
}
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data(count: data.count)
_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
encryptedBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { encryptedBytes in
dataBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { dataBytes in
keyBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { keyBytes in
for i in 0..<data.count {
encryptedBytes[i] = dataBytes[i] ^ keyBytes[i]
}
}
}
}
}
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
decryptedBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { decryptedBytes in
dataBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { dataBytes in
keyBytes.baseAddress!.assumingMemoryBound(to: UInt8.self).withMemoryRebound(to: UInt8.self, capacity: data.count) { keyBytes in
for i in 0..<data.count {
decryptedBytes[i] = dataBytes[i] ^ keyBytes[i]
}
}
}
}
}
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in // using '_' to ignore the result of a Void-returning function is redundant_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in // using '_' to ignore the result of a Void-returning function is redundant // XCTAssertEqual failed: (nil) is not equal to (Optional("8\u{04}\u{1F}\u{1F}\u{1F}DR2\u{04}\u{0C}\u{16}\u{15}6\u{05}\u{11}\u{04}S"))protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
encryptedData.append(byte ^ keyByte)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
decryptedData.append(byte ^ keyByte)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
encryptedData.append(byte ^ keyByte)
i += 1
}
return encryptedData as Data
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = NSMutableData()
var i = 0
for byte in data {
let keyByte = keyData[i % keyData.count]
decryptedData.append(byte ^ keyByte)
i += 1
}
return String(data: decryptedData as Data, encoding:.utf8)!
}
}
```encryptedData.append(byte ^ keyByte) // cannot convert value of type 'UInt8' to expected argument type 'Data'decryptedData.append(byte ^ keyByte) // cannot convert value of type 'UInt8' to expected argument type 'Data'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
return string.data(using:.utf8)!.xor(key.data(using:.utf8)!)
}
func decrypt(_ data: Data, _ key: String) -> String {
return data.xor(key.data(using:.utf8)!).toString()
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
return string.data(using:.utf8)!.xor(key.data(using:.utf8)!)
}
func decrypt(_ data: Data, _ key: String) -> String {
return data.xor(key.data(using:.utf8)!).toString()
}
}
```return string.data(using:.utf8)!.xor(key.data(using:.utf8)!) // value of type 'Data' has no member 'xor'return data.xor(key.data(using:.utf8)!).toString() // value of type 'Data' has no member 'xor'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
var encryptedData = Data(count: stringData.count)
_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in
stringData.withUnsafeBytes { stringBytes in
keyData.withUnsafeBytes { keyBytes in
encryptedBytes.copyBytes(from: stringBytes, count: stringData.count)
encryptedBytes.withUnsafeMutableBytes { encryptedBytes in
keyBytes.copyBytes(to: encryptedBytes, count: keyData.count)
}
}
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
decryptedBytes.copyBytes(from: dataBytes, count: data.count)
decryptedBytes.withUnsafeMutableBytes { decryptedBytes in
keyBytes.copyBytes(to: decryptedBytes, count: keyData.count)
}
}
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
var encryptedData = Data(count: stringData.count)
_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in
stringData.withUnsafeBytes { stringBytes in
keyData.withUnsafeBytes { keyBytes in
encryptedBytes.copyBytes(from: stringBytes, count: stringData.count)
encryptedBytes.withUnsafeMutableBytes { encryptedBytes in
keyBytes.copyBytes(to: encryptedBytes, count: keyData.count)
}
}
}
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in
data.withUnsafeBytes { dataBytes in
keyData.withUnsafeBytes { keyBytes in
decryptedBytes.copyBytes(from: dataBytes, count: data.count)
decryptedBytes.withUnsafeMutableBytes { decryptedBytes in
keyBytes.copyBytes(to: decryptedBytes, count: keyData.count)
}
}
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```_ = encryptedData.withUnsafeMutableBytes { encryptedBytes in // generic parameter 'ContentType' could not be inferredencryptedBytes.copyBytes(from: stringBytes, count: stringData.count) // value of type 'UnsafeMutablePointer<ContentType>' has no member 'copyBytes'_ = decryptedData.withUnsafeMutableBytes { decryptedBytes in // generic parameter 'ContentType' could not be inferreddecryptedBytes.copyBytes(from: dataBytes, count: data.count) // value of type 'UnsafeMutablePointer<ContentType>' has no member 'copyBytes'protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
self.lastRequest = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequest)
if timeSinceLastRequest < timeInterval {
return false
}
self.lastRequest = Date()
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
self.lastRequest = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequest)
if timeSinceLastRequest < timeInterval {
return false
}
self.lastRequest = Date()
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private var maxRequests: Int
private var timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requests: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if let lastRequestTime = lastRequestTime,
lastRequestTime.timeIntervalSinceNow < -timeInterval {
requests = 0
self.lastRequestTime = Date()
}
if requests < maxRequests {
requests += 1
lastRequestTime = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private var maxRequests: Int
private var timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requests: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if let lastRequestTime = lastRequestTime,
lastRequestTime.timeIntervalSinceNow < -timeInterval {
requests = 0
self.lastRequestTime = Date()
}
if requests < maxRequests {
requests += 1
lastRequestTime = Date()
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private var maxRequests: Int
private var timeInterval: TimeInterval
private var lastRequestTime: Date?
private var currentRequests: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestTime = lastRequestTime else {
currentRequests += 1
self.lastRequestTime = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
currentRequests = 1
self.lastRequestTime = Date()
return true
}
if currentRequests < maxRequests {
currentRequests += 1
self.lastRequestTime = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private var maxRequests: Int
private var timeInterval: TimeInterval
private var lastRequestTime: Date?
private var currentRequests: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestTime = lastRequestTime else {
currentRequests += 1
self.lastRequestTime = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
currentRequests = 1
self.lastRequestTime = Date()
return true
}
if currentRequests < maxRequests {
currentRequests += 1
self.lastRequestTime = Date()
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestsCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let canRequest = lastRequestTime == nil || Date().timeIntervalSince(lastRequestTime!) > timeInterval
if canRequest {
lastRequestTime = Date()
requestsCount = 0
return true
} else {
requestsCount += 1
return requestsCount < maxRequests
}
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestsCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let canRequest = lastRequestTime == nil || Date().timeIntervalSince(lastRequestTime!) > timeInterval
if canRequest {
lastRequestTime = Date()
requestsCount = 0
return true
} else {
requestsCount += 1
return requestsCount < maxRequests
}
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
lastRequestTime = now
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
lastRequestTime = now
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
return false
}
lastRequestTime = currentTime
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
return false
}
lastRequestTime = currentTime
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestsCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
let timeInterval = now.timeIntervalSince(lastRequestTime)
if timeInterval < self.timeInterval {
return false
}
}
lastRequestTime = now
requestsCount += 1
if requestsCount > maxRequests {
requestsCount = maxRequests
}
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestsCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
let timeInterval = now.timeIntervalSince(lastRequestTime)
if timeInterval < self.timeInterval {
return false
}
}
lastRequestTime = now
requestsCount += 1
if requestsCount > maxRequests {
requestsCount = maxRequests
}
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestTime = lastRequestTime else {
self.lastRequestTime = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
self.lastRequestTime = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestTime = lastRequestTime else {
self.lastRequestTime = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
self.lastRequestTime = Date()
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
self.lastRequest = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequest)
if timeSinceLastRequest > timeInterval {
self.lastRequest = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
self.lastRequest = Date()
return true
}
let timeSinceLastRequest = Date().timeIntervalSince(lastRequest)
if timeSinceLastRequest > timeInterval {
self.lastRequest = Date()
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestDate: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestDate = lastRequestDate else {
self.lastRequestDate = Date()
return true
}
let currentDate = Date()
let timeInterval = currentDate.timeIntervalSince(lastRequestDate)
if timeInterval >= self.timeInterval {
self.lastRequestDate = currentDate
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestDate: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequestDate = lastRequestDate else {
self.lastRequestDate = Date()
return true
}
let currentDate = Date()
let timeInterval = currentDate.timeIntervalSince(lastRequestDate)
if timeInterval >= self.timeInterval {
self.lastRequestDate = currentDate
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let result = value
mutex.unlock()
return result
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let result = value
mutex.unlock()
return result
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
self.counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
class ThreadSafeCounterReadOnly: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations only.
class ThreadSafeCounterReadOnly: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}
class ThreadSafeCounterForRead: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}
// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterForRead: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let mutex = NSRecursiveLock()
required init(value: Int) {
self.value = value
}
func increment() {
mutex.lock()
value += 1
mutex.unlock()
}
func currentValue() -> Int {
mutex.lock()
let currentValue = value
mutex.unlock()
return currentValue
}
}
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { $0.pipe($1) }
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { $0.pipe($1) }
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 3 }
pipeline.execute() // 9
```init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'pipeline.transforms = transforms // cannot assign value of type '[((Output) -> Output)]' to type '[((U) -> U)]'return transforms.reduce(value) { $0.pipe($1) } // value of type 'Output' has no member 'pipe'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { $0.pipe($1) }
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { $0.pipe($1) }
}
}
// Example usage
let pipeline = Pipeline(value: 1)
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }
.pipe { $0 * 2 }init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'pipeline.transforms = transforms // cannot assign value of type '[((Output) -> Output)]' to type '[((U) -> U)]'return transforms.reduce(value) { $0.pipe($1) } // value of type 'Output' has no member 'pipe'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms + [transform]
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return transform(value)
}
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms + [transform]
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return transform(value)
}
}
}
// Example usage
let pipeline = Pipeline(value: 1)
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1pipeline.transforms = transforms + [transform] // cannot convert value of type '(Output) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')pipeline.transforms = transforms + [transform] // cannot convert value of type '[((Output) -> Output)]' to expected argument type 'IndexPath'pipeline.transforms = transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U)]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: (Output) -> Output
private var next: PipelineProtocol?
init(value: Output, transform: @escaping (Output) -> Output) {
self.value = value
self.transform = transform
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let next = Pipeline<U>(value: transform(value), transform: transform)
self.next = next
return next
}
func execute() -> Output {
return next?.execute()?? value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: (Output) -> Output
private var next: PipelineProtocol?
init(value: Output, transform: @escaping (Output) -> Output) {
self.value = value
self.transform = transform
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let next = Pipeline<U>(value: transform(value), transform: transform)
self.next = next
return next
}
func execute() -> Output {
return next?.execute()?? value
}
}
// Initial value of the pipeline
let pipeline = Pipeline<Int>(value: 1) { $0 + 1 }
// First transformation
let pipeline2 = pipeline.pipe { $0 * 2 }
// Second transformation
let pipeline3 = pipeline2.pipe { $0 * 3 }
// Final output
pipeline3.execute()
```class Pipeline<Output>: PipelineProtocol { // type 'Pipeline<Output>' does not conform to protocol 'PipelineProtocol'private var next: PipelineProtocol? // use of protocol 'PipelineProtocol' as a type must be written 'any PipelineProtocol'let next = Pipeline<U>(value: transform(value), transform: transform) // cannot convert value of type '(Output) -> U' to expected argument type '(U) -> U'return next?.execute()?? value // property is accessed but result is unusedreturn next?.execute()?? value // consecutive statements on a line must be separated by ';'return next?.execute()?? value // cannot use optional chaining on non-optional value of type 'Any'return next?.execute()?? value // cannot use optional chaining on non-optional value of type 'Any'let received = Pipeline(value: "Hello!") // missing argument for parameter 'transform' in callprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: ((Output) -> Output)?
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transform = transform
return pipeline
}
func execute() -> Output {
return transform?(value)?? value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: ((Output) -> Output)?
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transform = transform
return pipeline
}
func execute() -> Output {
return transform?(value)?? value
}
}
// Example usage
let pipeline = Pipeline(value: 1)
.pipe { $0 * 2 }
.pipe { $0 * 3 }
.pipe { $0 * 4 }
.pipe { $0 * 5 }
.pipe { $0 * 6 }
.pipe { $0 * 7 }
.pipe { $0 * 8 }
.pipe { $0 * 9 }
.pipe { $0 * 10 }
.execute()
print(pipeline)
```init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'pipeline.transform = transform // cannot assign value of type '(Output) -> U' to type '((U) -> U)?'return transform?(value)?? value // cannot use optional chaining on non-optional value of type 'Output'return transform?(value)?? value // property is accessed but result is unusedreturn transform?(value)?? value // consecutive statements on a line must be separated by ';'return transform?(value)?? value // cannot use optional chaining on non-optional value of type 'Output'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
typealias Output = T
private var value: Output
private var transform: ((Output) -> Output)?
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transform = transform
return pipeline
}
func execute() -> Output {
guard let transform = transform else {
return value
}
return transform(value)
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
typealias Output = T
private var value: Output
private var transform: ((Output) -> Output)?
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transform = transform
return pipeline
}
func execute() -> Output {
guard let transform = transform else {
return value
}
return transform(value)
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 10)
.pipe { $0 * 2 }
.pipe { $0 + 10 }
.pipe { $0 / 2 }
.execute()
```init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'pipeline.transform = transform // cannot assign value of type '(Pipeline<T>.Output) -> U' (aka '(T) -> U') to type '((U) -> U)?'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private let value: Output
private var transformations: [((Output) -> Output)] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
transformations.append(transform)
return pipeline
}
func execute() -> Output {
var result = value
for transform in transformations {
result = transform(result)
}
return result
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private let value: Output
private var transformations: [((Output) -> Output)] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
transformations.append(transform)
return pipeline
}
func execute() -> Output {
var result = value
for transform in transformations {
result = transform(result)
}
return result
}
}
// Example usage
let pipeline = Pipeline(value: 10)
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 / 2 }
.pipe { $0 * 3 }
.pipe { $0 + 1 }
.pipe { $0 / 2 }
let result = pipeline.execute()
print(result) // 11
```transformations.append(transform) // cannot convert value of type '(Output) -> U' to expected argument type '(Output) -> Output'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private let value: Output
private var transforms: [((Output) -> Output)?] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms + [transform]
return pipeline
}
func execute() -> Output {
var result = value
for transform in transforms {
result = transform?(result)?? result
}
return result
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private let value: Output
private var transforms: [((Output) -> Output)?] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
pipeline.transforms = transforms + [transform]
return pipeline
}
func execute() -> Output {
var result = value
for transform in transforms {
result = transform?(result)?? result
}
return result
}
}
```pipeline.transforms = transforms + [transform] // cannot convert value of type '[((Output) -> Output)?]' to expected argument type 'Array<((U) -> U)?>'result = transform?(result)?? result // consecutive statements on a line must be separated by ';'result = transform?(result)?? result // cannot use optional chaining on non-optional value of type 'Output'result = transform?(result)?? result // cannot use optional chaining on non-optional value of type 'Output'result = transform?(result)?? result // value of optional type 'Output?' must be unwrapped to a value of type 'Output'result = transform?(result)?? result // variable is unusedprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: (Output) -> Output
init(value: Output, transform: @escaping (Output) -> Output) {
self.value = value
self.transform = transform
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value), transform: transform)
}
func execute() -> Output {
return transform(value)
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transform: (Output) -> Output
init(value: Output, transform: @escaping (Output) -> Output) {
self.value = value
self.transform = transform
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value), transform: transform)
}
func execute() -> Output {
return transform(value)
}
}
// Initial value of the pipeline
let pipeline = Pipeline<String>(value: "Hello")
// Sequentially apply transformations
let result = pipeline
.pipe { $0 + " World" }
.pipe { $0.uppercased() }
.pipe { $0 + "!" }
.execute()
print(result) // HELLO WORLD!
```class Pipeline<Output>: PipelineProtocol { // type 'Pipeline<Output>' does not conform to protocol 'PipelineProtocol'return Pipeline<U>(value: transform(value), transform: transform) // cannot convert value of type '(Output) -> U' to expected argument type '(U) -> U'let received = Pipeline(value: "Hello!") // missing argument for parameter 'transform' in callprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)?] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
transforms.append(transform)
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
transform?(value)?? value
}
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
private var transforms: [((Output) -> Output)?] = []
init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let pipeline = Pipeline<U>(value: transform(value))
transforms.append(transform)
return pipeline
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
transform?(value)?? value
}
}
}
```init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'transforms.append(transform) // cannot convert value of type '(Output) -> U' to expected argument type '((Output) -> Output)?'transform?(value)?? value // cannot use optional chaining on non-optional value of type 'Output'transform?(value)?? value // cannot use optional chaining on non-optional value of type 'Output'transform?(value)?? value // consecutive statements on a line must be separated by ';'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(newValue) }
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(newValue) }
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
class ObservablePropertySimple<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
class ObservablePropertySimple2<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
class ObservablePropertySimple3<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
class ObservablePropertySimple4<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
// A simple observable property that notifies observers of value changes.
class ObservablePropertySimple<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
// A simple observable property that notifies observers of value changes.
class ObservablePropertySimple2<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
// A simple observable property that notifies observers of value changes.
class ObservablePropertySimple3<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
// A simple observable property that notifies observers of value changes.
class ObservablePropertySimple4<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for (_, observer) in observers {
observer(_value)
}
}
}
// A simple observable property that notifies observers of value changes.
class ObservablePropertySimple5<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observerinit(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservablePropertySimple<Value>'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservablePropertySimple2<Value>'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservablePropertySimple3<Value>'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservablePropertySimple4<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
self._value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
self._value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
self._value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get { return _value }
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get { return _value }
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get { return _value }
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
observers.values.forEach { $0(value) }
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
observers.values.forEach { $0(value) }
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for observer in observers.values {
observer(_value)
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for observer in observers.values {
observer(_value)
}
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
observers.values.forEach { $0(_value) }
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
observers.values.forEach { $0(_value) }
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
observers.values.forEach { $0(_value) }
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
observers.values.forEach { $0(_value) }
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _valueinit(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
observers.values.forEach { $0(_value) }
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
_value = value
}
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
observers.values.forEach { $0(_value) }
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
for observer in observers.values {
observer(_value)
}
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
for observer in observers.values {
observer(_value)
}
}
}
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return value < lowerBound? lowerBound : value > upperBound? upperBound : value
}
}
struct Person {
@Clamped(0...100) var age: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return value < lowerBound? lowerBound : value > upperBound? upperBound : value
}
}
struct Person {
@Clamped(0...100) var age: Int
}
var person = Person(age: 100)
person.age = 101
print(person.age) // 100
```return value < lowerBound? lowerBound : value > upperBound? upperBound : value // consecutive statements on a line must be separated by ';'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // cannot use optional chaining on non-optional value of type 'Bound'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // expected expressionreturn value < lowerBound? lowerBound : value > upperBound? upperBound : value // consecutive statements on a line must be separated by ';'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // expression of type 'Bound' is unusedreturn value < lowerBound? lowerBound : value > upperBound? upperBound : value // value of optional type 'Bound?' must be unwrapped to a value of type 'Bound'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // cannot convert return expression of type 'Bool' to return type 'Bound'@Clamped(0...100) var age: Int // missing argument for parameter 'wrappedValue' in callprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
struct Person {
@Clamped(0...100) var age: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
// Example usage
struct Person {
@Clamped(0...100) var age: Int
}
var person = Person(age: 100)
person.age = 150 // Clamps to 100
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'@Clamped(0...100) var age: Int // missing argument for parameter 'wrappedValue' in callprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return value < lowerBound? lowerBound : value > upperBound? upperBound : value
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return value < lowerBound? lowerBound : value > upperBound? upperBound : value
}
}
```return value < lowerBound? lowerBound : value > upperBound? upperBound : value // consecutive statements on a line must be separated by ';'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // cannot use optional chaining on non-optional value of type 'Bound'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // expected expressionreturn value < lowerBound? lowerBound : value > upperBound? upperBound : value // consecutive statements on a line must be separated by ';'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // expression of type 'Bound' is unusedreturn value < lowerBound? lowerBound : value > upperBound? upperBound : value // value of optional type 'Bound?' must be unwrapped to a value of type 'Bound'return value < lowerBound? lowerBound : value > upperBound? upperBound : value // cannot convert return expression of type 'Bool' to return type 'Bound'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = range.clamp(wrappedValue)
self.range = range
}
}
// Clamped propertyself.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return Swift.min(Swift.max(lowerBound, value), upperBound)
}
}
struct MyStruct {
@Clamped(0...100) var myValue: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return Swift.min(Swift.max(lowerBound, value), upperBound)
}
}
struct MyStruct {
@Clamped(0...100) var myValue: Int
}
var myStruct = MyStruct(myValue: 100)
myStruct.myValue = 1000
print(myStruct.myValue) // Prints 100
```@Clamped(0...100) var myValue: Int // missing argument for parameter 'wrappedValue' in callprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
// Usage:
@Clamped(0...100) var sliderValue: Int
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Person {
@Logged(logger: { print($0, $1) })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
// Example usage
struct Person {
@Logged(logger: { print($0, $1) })
var name: String
}
var person = Person(name: "John")
person.name = "Jane"
// Prints "get John"
// Prints "set Jane"
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
// XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
struct SimpleStruct {
@Logged(logger: { print($0, $1) })
var value: Int
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
// A simple struct that uses the Logged property wrapper.
struct SimpleStruct {
@Logged(logger: { print($0, $1) })
var value: Int
}
let simpleStruct = SimpleStruct(value: 1)
simpleStruct.value = 2
```struct Logged<Value> : LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
// A property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value: Equatable> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
struct User {
@Logged(logger: { event, value in
print("Logged \(event) \(value)")
})
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value: Equatable> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
// A type that uses the Logged property wrapper.
struct User {
@Logged(logger: { event, value in
print("Logged \(event) \(value)")
})
var name: String
}
var user = User(name: "")
user.name = ""
```struct Logged<Value: Equatable> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private var wrappedValue: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
struct User {
@Logged(logger: { print($0, $1) })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private var wrappedValue: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
// A type that uses the Logged property wrapper.
struct User {
@Logged(logger: { print($0, $1) })
var name: String
}
let user = User(name: "")
user.name = ""
// Prints "set "
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var projectedValue: Self {
self
}
mutating func update(with value: Value) {
logger(.set, value)
wrappedValue = value
}
}
struct User {
@Logged<String> var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var projectedValue: Self {
self
}
mutating func update(with value: Value) {
logger(.set, value)
wrappedValue = value
}
}
struct User {
@Logged<String> var name: String
}
let user = User(name: "")
user.name = ""
// Prints "set: "
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
}
struct User {
@Logged(logger: { print($0, $1) })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
}
// A type that uses the property wrapper.
struct User {
@Logged(logger: { print($0, $1) })
var name: String
}
let user = User(name: "")
user.name = ""
```struct Logged<Value> : LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
struct MyStruct {
@Logged(logger: { print($0, $1) })
var value: Int
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
willSet {
logger(.set, newValue)
}
}
}
// A struct that uses the Logged property wrapper.
struct MyStruct {
@Logged(logger: { print($0, $1) })
var value: Int
}
```struct Logged<Value> : LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
// TODO: Implement
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
// TODO: Implement
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
// TODO: Implement
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
// TODO: Implement
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
// TODO: Implement
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
// TODO: Implement
}
}
```} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.success(city: "Kyiv", forecast: "+28")))protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
//...
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
//...
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
//...
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
//...
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
//...
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
//...
}
}
```} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return nil
case.keyboardDeleteBackwards:
return nil
case.searchButtonPress:
return nil
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.success(city: "Kyiv", forecast: "+28")))protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
//...
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
//...
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
//...
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return handle(character: character)
case.keyboardDeleteBackwards:
return handle(deleteBackwards: ())
case.searchButtonPress:
return handle(searchButtonPress: ())
}
}
private func handle(character: Character) -> ApplicationFeedback? {
//...
}
private func handle(deleteBackwards: ()) -> ApplicationFeedback? {
//...
}
private func handle(searchButtonPress: ()) -> ApplicationFeedback? {
//...
}
}
```} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'} // missing return in instance method expected to return 'ApplicationFeedback?'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
await withUnsafeContinuation { continuation in
continuation.resume(returning: self.balance)
}
}
}
func deposit(amount: Double) async {
await withUnsafeContinuation { continuation in
self.balance += amount
continuation.resume()
}
}
func withdraw(amount: Double) async -> Bool {
await withUnsafeContinuation { continuation in
if self.balance >= amount {
self.balance -= amount
continuation.resume(returning: true)
} else {
continuation.resume(returning: false)
}
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
await withUnsafeContinuation { continuation in
continuation.resume(returning: self.balance)
}
}
}
func deposit(amount: Double) async {
await withUnsafeContinuation { continuation in
self.balance += amount
continuation.resume()
}
}
func withdraw(amount: Double) async -> Bool {
await withUnsafeContinuation { continuation in
if self.balance >= amount {
self.balance -= amount
continuation.resume(returning: true)
} else {
continuation.resume(returning: false)
}
}
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
}
return false
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
}
return false
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.unlock() // instance method 'unlock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.unlock() // instance method 'unlock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
}
return false
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
private var lock = NSRecursiveLock()
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
lock.lock()
defer { lock.unlock() }
return balance
}
}
func deposit(amount: Double) async {
lock.lock()
balance += amount
lock.unlock()
}
func withdraw(amount: Double) async -> Bool {
lock.lock()
defer { lock.unlock() }
if balance >= amount {
balance -= amount
return true
}
return false
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.unlock() // instance method 'unlock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6lock.lock() // instance method 'lock' is unavailable from asynchronous contexts; Use async-safe scoped locking instead; this is an error in Swift 6protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
var balance: Double
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
var balance: Double
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
await withUnsafeContinuation { continuation in
continuation.resume(returning: self.balance)
}
}
}
func deposit(amount: Double) async {
await withUnsafeContinuation { continuation in
self.balance += amount
continuation.resume()
}
}
func withdraw(amount: Double) async -> Bool {
await withUnsafeContinuation { continuation in
if self.balance >= amount {
self.balance -= amount
continuation.resume(returning: true)
} else {
continuation.resume(returning: false)
}
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
await withUnsafeContinuation { continuation in
continuation.resume(returning: self.balance)
}
}
}
func deposit(amount: Double) async {
await withUnsafeContinuation { continuation in
self.balance += amount
continuation.resume()
}
}
func withdraw(amount: Double) async -> Bool {
await withUnsafeContinuation { continuation in
if self.balance >= amount {
self.balance -= amount
continuation.resume(returning: true)
} else {
continuation.resume(returning: false)
}
}
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
return balance
}
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
var balance: Double {
get async {
return balance
}
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'var balance: Double { // invalid redeclaration of 'balance'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else {
return false
}
balance -= amount
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else {
return false
}
balance -= amount
return true
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
var balance: Double = 0.0
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
}
```protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self._condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self._condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}
```_value = _wrappedValue() // cannot assign to property: 'self' is immutable_condition() // result of call to function returning 'Bool' is unusedprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
func _wrappedValue() -> Value {
_value = _wrappedValue()
return _value
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
func _wrappedValue() -> Value {
_value = _wrappedValue()
return _value
}
}
```_value = _wrappedValue() // cannot assign to property: 'self' is immutable_value = _wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true })
var value: Int
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true })
var value: Int
}
let myStruct = MyStruct()
myStruct.value // 1
myStruct.value = 2
myStruct.value // 1
```_value = _wrappedValue() // cannot assign to property: 'self' is immutable_condition() // result of call to function returning 'Bool' is unused@Cached(wrappedValue: { 1 }, condition: { true }) // add () to forward @autoclosure parameterprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _value()
}
return _value
}
set {
_value = newValue
}
}
}
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true })
var value: Int
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _value()
}
return _value
}
set {
_value = newValue
}
}
}
// Usage:
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true })
var value: Int
}
```_value = _value() // cannot call value of non-function type 'Value'_value = _value() // cannot assign to property: 'self' is immutable@Cached(wrappedValue: { 1 }, condition: { true }) // add () to forward @autoclosure parameterprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var computedValue: Value {
get {
if condition() {
value = wrappedValue()
}
return value
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
}
var wrappedValue: () -> Value {
get {
computedValue
}
set {
value = newValue()
}
}
}
struct User {
@Cached(wrappedValue: { User.load() }, condition: { User.isLoggedIn() })
static var currentUser: User?
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var computedValue: Value {
get {
if condition() {
value = wrappedValue()
}
return value
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
}
var wrappedValue: () -> Value {
get {
computedValue
}
set {
value = newValue()
}
}
}
// Example usage
struct User {
@Cached(wrappedValue: { User.load() }, condition: { User.isLoggedIn() })
static var currentUser: User?
}
```value = wrappedValue() // cannot assign to property: 'self' is immutablecomputedValue // cannot convert return expression of type 'Value' to return type '() -> Value'@Cached(wrappedValue: { User.load() }, condition: { User.isLoggedIn() }) // type 'User' has no member 'load'@Cached(wrappedValue: { User.load() }, condition: { User.isLoggedIn() }) // type 'User' has no member 'isLoggedIn'static var currentUser: User? // property type 'User?' does not match 'wrappedValue' type '() -> () -> _'var cached: Int = { // property type 'Int' does not match 'wrappedValue' type '() -> Int'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_value = _wrappedValue()
return _value
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
_value = wrappedValue()
_condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_value = _wrappedValue()
return _value
}
}
```_value = _wrappedValue() // cannot assign to property: 'self' is immutable_value = _wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self._condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private var _condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self._condition = condition
}
var wrappedValue: Value {
get {
if _condition() {
_value = _wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
private func _wrappedValue() -> Value {
_condition()
return _value
}
}
```_value = _wrappedValue() // cannot assign to property: 'self' is immutable_condition() // result of call to function returning 'Bool' is unusedprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private let condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self.condition = condition
}
var wrappedValue: Value {
get {
if condition() {
_value = wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var _value: Value
private let condition: () -> Bool
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self._value = wrappedValue()
self.condition = condition
}
var wrappedValue: Value {
get {
if condition() {
_value = wrappedValue()
}
return _value
}
set {
_value = newValue
}
}
}
```_value = wrappedValue() // cannot call value of non-function type 'Value'_value = wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var computedValue: Value {
get {
if condition() {
value = wrappedValue()
}
return value
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
}
var wrappedValue: () -> Value {
get {
return computedValue
}
set {
value = newValue()
}
}
}
struct User {
@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil })
var name: String
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var computedValue: Value {
get {
if condition() {
value = wrappedValue()
}
return value
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
}
var wrappedValue: () -> Value {
get {
return computedValue
}
set {
value = newValue()
}
}
}
struct User {
@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil })
var name: String
}
let user = User()
user.name = ""
print(user.name) //
UserDefaults.standard.set(nil, forKey: "name")
print(user.name) // Anonymous
```value = wrappedValue() // cannot assign to property: 'self' is immutablereturn computedValue // cannot convert return expression of type 'Value' to return type '() -> Value'@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // consecutive statements on a line must be separated by ';'@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // cannot use optional chaining on non-optional value of type 'String'@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // cannot assign through '!': function call returns immutable value@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // 'nil' cannot be assigned to type 'String'@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // cannot convert value of type '()' to closure result type 'Bool'@Cached(wrappedValue: { UserDefaults.standard.string(forKey: "name")?? "Anonymous" }, condition: { UserDefaults.standard.string(forKey: "name")!= nil }) // '=' must have consistent whitespace on both sidesvar name: String // property type 'String' does not match 'wrappedValue' type '() -> () -> ()'var cached: Int = { // property type 'Int' does not match 'wrappedValue' type '() -> Int'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
var wrappedValue: Value {
get {
if condition() {
value = compute()
}
return value
}
set {
value = newValue
}
}
}
// Usage:
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var value: Value
private var condition: () -> Bool
private var compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.value = wrappedValue()
self.condition = condition
self.compute = { wrappedValue() }
}
varvalue = compute() // cannot assign to property: 'self' is immutableinfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <T, U, V>(f: @escaping (T) -> U, g: @escaping (U) -> V) -> (T) -> V {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
// Example usage
let f = { x in x + 1 }
let g = { x in x * 2 }
let h = f >>> g
h(2) // 5
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: LogicalConjunctionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
// Example usage:
let f = { x in x + 1 }
let g = { x in x * 2 }
let h = f >>> g
h(3) // 8
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { a in g(f(a)) }
}
// Example usage:
let compose = { (x: Int) -> Int in x + 1 } >>> { (x: Int) -> Int in x * 2 }
compose(2) // 5
```import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// An error occurred while reading from the stream.
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// An error occurred while reading from the stream.
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```hasher.update(data: Data(bytes: buffer, count: bytesRead)) // cannot use mutating member on immutable value: 'hasher' is a 'let' constantimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from stream
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from stream
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```hasher.update(data: Data(bytes: buffer, count: bytesRead)) // cannot use mutating member on immutable value: 'hasher' is a 'let' constantimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(buffer: buffer[0..<bytesRead])
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(buffer: buffer[0..<bytesRead])
}
return hasher.finalize()
}
```hasher.update(buffer: buffer[0..<bytesRead]) // incorrect argument label in call (have 'buffer:', expected 'data:')import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
// Create a SHA-256 hasher.
let hasher = SHA256()
// Create a buffer to read data from the stream.
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
// Loop until the stream is empty.
while inputStream.hasBytesAvailable {
// Read data from the stream into the buffer.
inputStream.read(buffer, maxLength: bufferSize)
// Update the hasher with the data read from the stream.
hasher.update(data: Data(bytes: buffer, count: bufferSize))
}
// Free the buffer.
buffer.deallocate()
// Return the hasher's final hash.
return hasher.final()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
// Create a SHA-256 hasher.
let hasher = SHA256()
// Create a buffer to read data from the stream.
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
// Loop until the stream is empty.
while inputStream.hasBytesAvailable {
// Read data from the stream into the buffer.
inputStream.read(buffer, maxLength: bufferSize)
// Update the hasher with the data read from the stream.
hasher.update(data: Data(bytes: buffer, count: bufferSize))
}
// Free the buffer.
buffer.deallocate()
// Return the hasher's final hash.
return hasher.final()
}
```hasher.update(data: Data(bytes: buffer, count: bufferSize)) // cannot use mutating member on immutable value: 'hasher' is a 'let' constantreturn hasher.final() // value of type 'SHA256' has no member 'final'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from stream.
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from stream.
break
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```hasher.update(data: Data(bytes: buffer, count: bytesRead)) // cannot use mutating member on immutable value: 'hasher' is a 'let' constantimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
// Create a SHA-256 hasher.
var hasher = SHA256()
// Read data from the stream with a specified buffer size.
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(buffer)
}
// Return the computed hash.
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
// Create a SHA-256 hasher.
var hasher = SHA256()
// Read data from the stream with a specified buffer size.
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(buffer)
}
// Return the computed hash.
return hasher.finalize()
}
```hasher.update(buffer) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead > 0 {
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead > 0 {
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
}
return hasher.finalize()
}
```import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(data: Data(buffer))
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
inputStream.read(&buffer, maxLength: bufferSize)
hasher.update(data: Data(buffer))
}
return hasher.finalize()
}
``` // XCTAssertEqual failed: (SHA256 digest: 4555555dc68d872c2270ba89ecc5f6f094812f65372b37e50071fe5168031c49) is not equal to (SHA256 digest: 1cfbcd29ecded7332549d09174ee24185a0978679e46507ac7467d8fe1e63880)import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
if read < 0 {
// Error reading from stream
break
}
hasher.update(data: Data(bytes: buffer, count: read))
}
return hasher.final()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
if read < 0 {
// Error reading from stream
break
}
hasher.update(data: Data(bytes: buffer, count: read))
}
return hasher.final()
}
```hasher.update(data: Data(bytes: buffer, count: read)) // cannot use mutating member on immutable value: 'hasher' is a 'let' constantreturn hasher.final() // value of type 'SHA256' has no member 'final'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead > 0 {
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead > 0 {
hasher.update(data: Data(bytes: buffer, count: bytesRead))
}
}
return hasher.finalize()
}
```typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var cString = [CChar](repeating: 0, count: 16)
for i in 0..<16 {
cString[i] = Int8(tuple16[i])
}
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from acString[i] = Int8(tuple16[i]) // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadtypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {
if tuple16[i] == 0 {
break
}
string += String(UnicodeScalar(tuple16[i]))
}
self.init(string)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var string = ""
for i in 0..<16 {if tuple16[i] == 0 { // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadstring += String(UnicodeScalar(tuple16[i])) // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadtypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
let tuple16 = (Int8(0), Int8(1), Int8(2), Int8(3), Int8(4), Int8(5), Int8(6), Int8(7), Int8(8), Int8(9), Int8(10), Int8(11), Int8(12), Int8(13), Int8(14), Int8(15))
let string = String(tuple16: tuple16)
print(string)
// Prints "0123456789101112131415"
```tuple16.0 += 1 // left side of mutating operator isn't mutable: 'tuple16' is a 'let' constanttypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(bytes: tuple16, encoding:.utf8)!
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(bytes: tuple16, encoding:.utf8)!
}
}
```self.init(bytes: tuple16, encoding:.utf8)! // type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') cannot conform to 'Sequence'typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16[i])
}
self.init(cString: buffer)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16[i])
}
self.init(cString: buffer)
}
}
// Example usage:
let tuple16 = (Int8(0), Int8(1), Int8(2), Int8(3), Int8(4), Int8(5), Int8(6), Int8(7), Int8(8), Int8(9), Int8(10), Int8(11), Int8(12), Int8(13), Int8(14), Int8(15), Int8(16))
let str = String(tuple16: tuple16)
print(str) // prints "012345678910111213141516"
```buffer[i] = CChar(tuple16[i]) // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadtypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16[i])
}
self.init(cString: buffer)
}
}
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
i += 1
}
return tuple
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16[i])
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows converting a String to a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
i += 1
}
return tuple
}
}
// Extension to the String type that allows converting a String to a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
i += 1
}
return tuple
}
}
// Extension to the String type that allows converting a String to a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
i += 1
}
return tuple
}
}
// Extension to the String type that allows converting a String to a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
i += 1
}
return tuple
}
}
// Extension to the String type that allows converting a String to a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
var tuple16: Tuple16 {
var tuple = (Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0), Int8(0))
var i = 0
for c in self.cString(using:.utf8) {
if i == 16 {
break
}
tuple[i] = Int8(c)
buffer[i] = CChar(tuple16[i]) // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadfor c in self.cString(using:.utf8) { // for-in loop requires '[CChar]?' (aka 'Optional<Array<Int8>>') to conform to 'Sequence'; did you mean to unwrap optional?typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
let cString = UnsafePointer<Int8>(tuple16)
self.init(cString: cString)
}
}
extension String {
init(cString: UnsafePointer<Int8>) {
let cString = UnsafePointer<CChar>(cString)
self.init(cString: cString, encoding: NSUTF8StringEncoding)
}
}
extension String {
init(cString: UnsafePointer<CChar>, encoding: NSStringEncoding) {
let cString = UnsafePointer<CChar>(cString)
let cStringLength = strlen(cString)
let nsString = NSString(bytes: cString, length: cStringLength, encoding: encoding)
self.init(nsString as String)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
let cString = UnsafePointer<Int8>(tuple16)
self.init(cString: cString)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(cString: UnsafePointer<Int8>) {
let cString = UnsafePointer<CChar>(cString)
self.init(cString: cString, encoding: NSUTF8StringEncoding)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(cString: UnsafePointer<CChar>, encoding: NSStringEncoding) {
let cString = UnsafePointer<CChar>(cString)
let cStringLength = strlen(cString)
let nsString = NSString(bytes: cString, length: cStringLength, encoding: encoding)
self.init(nsString as String)
}
}
```let cString = UnsafePointer<Int8>(tuple16) // cannot convert value of type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') to expected argument type 'UnsafePointer<Int8>'init(cString: UnsafePointer<CChar>, encoding: NSStringEncoding) { // cannot find type 'NSStringEncoding' in scope; did you mean to use 'UInt'?self.init(nsString as String) // 'NSString?' is not convertible to 'String'typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
buffer[i] = CChar(tuple16.0)
tuple16.0 += 1
}
self.init(cString: buffer)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var buffer = [CChar](repeating: 0, count: 17)
for i in 0..<16 {
tuple16.0 += 1 // left side of mutating operator isn't mutable: 'tuple16' is a 'let' constanttypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15)
}
}
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5self.init(tuple16.0, tuple16.1, tuple16.2, tuple16.3, tuple16.4, tuple16.5, tuple16.6, tuple16.7, tuple16.8, tuple16.9, tuple16.10, tuple16.11, tuple16.12, tuple16.13, tuple16.14, tuple16.15) // initializer expects a single parameter of type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)')import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize: CGSize =.zero
var rhsSize: CGSize =.zero
var lhsPixelFormat: OSType = 0
var rhsPixelFormat: OSType = 0
var lhsBytesPerRow: Int = 0
var rhsBytesPerRow: Int = 0
var lhsBaseAddress: UnsafeMutableRawPointer?
var rhsBaseAddress: UnsafeMutableRawPointer?
CVPixelBufferGetDimensions(lhs, &lhsSize)
CVPixelBufferGetDimensions(rhs, &rhsSize)
CVPixelBufferGetPixelFormatType(lhs, &lhsPixelFormat)
CVPixelBufferGetPixelFormatType(rhs, &rhsPixelFormat)
CVPixelBufferGetBytesPerRow(lhs, &lhsBytesPerRow)
CVPixelBufferGetBytesPerRow(rhs, &rhsBytesPerRow)
CVPixelBufferGetBaseAddress(lhs, &lhsBaseAddress)
CVPixelBufferGetBaseAddress(rhs, &rhsBaseAddress)
return lhsSize == rhsSize && lhsPixelFormat == rhsPixelFormat && lhsBytesPerRow == rhsBytesPerRow && lhsBaseAddress == rhsBaseAddress
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize: CGSize =.zero
var rhsSize: CGSize =.zero
var lhsPixelFormat: OSType = 0
var rhsPixelFormat: OSType = 0
var lhsBytesPerRow: Int = 0
var rhsBytesPerRow: Int = 0
var lhsBaseAddress: UnsafeMutableRawPointer?
var rhsBaseAddress: UnsafeMutableRawPointer?
CVPixelBufferGetDimensions(lhs, &lhsSize)
CVPixelBufferGetDimensions(rhs, &rhsSize)
CVPixelBufferGetPixelFormatType(lhs, &lhsPixelFormat)
CVPixelBufferGetPixelFormatType(rhs, &rhsPixelFormat)
CVPixelBufferGetBytesPerRow(lhs, &lhsBytesPerRow)
CVPixelBufferGetBytesPerRow(rhs, &rhsBytesPerRow)
CVPixelBufferGetBaseAddress(lhs, &lhsBaseAddress)
CVPixelBufferGetBaseAddress(rhs, &rhsBaseAddress)
return lhsSize == rhsSize && lhsPixelFormat == rhsPixelFormat && lhsBytesPerRow == rhsBytesPerRow && lhsBaseAddress == rhsBaseAddress
}
```var lhsSize: CGSize =.zero // '=' must have consistent whitespace on both sidesvar rhsSize: CGSize =.zero // '=' must have consistent whitespace on both sidesCVPixelBufferGetDimensions(lhs, &lhsSize) // cannot find 'CVPixelBufferGetDimensions' in scopeCVPixelBufferGetDimensions(rhs, &rhsSize) // cannot find 'CVPixelBufferGetDimensions' in scopeCVPixelBufferGetPixelFormatType(lhs, &lhsPixelFormat) // extra argument in callCVPixelBufferGetPixelFormatType(rhs, &rhsPixelFormat) // extra argument in callCVPixelBufferGetBytesPerRow(lhs, &lhsBytesPerRow) // extra argument in callCVPixelBufferGetBytesPerRow(rhs, &rhsBytesPerRow) // extra argument in callCVPixelBufferGetBaseAddress(lhs, &lhsBaseAddress) // extra argument in callCVPixelBufferGetBaseAddress(rhs, &rhsBaseAddress) // extra argument in callimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsFormat!= rhsFormat {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
if lhsWidth!= rhsWidth {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
if lhsHeight!= rhsHeight {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
if lhsBytesPerRow!= rhsBytesPerRow {
return false
}
let lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
let rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
let lhsBytesPerPixel = CVPixelBufferGetBytesPerRow(lhs) / CVPixelBufferGetWidth(lhs)
let rhsBytesPerPixel = CVPixelBufferGetBytesPerRow(rhs) / CVPixelBufferGetWidth(rhs)
if lhsBytesPerPixel!= rhsBytesPerPixel {
return false
}
let lhsBytes = CVPixelBufferGetBaseAddress(lhs)
let rhsBytes = CVPixelBufferGetBaseAddress(rhs)
if lhsBytes == rhsBytes {
return true
}
if lhsBytes == nil || rhsBytes == nil {
return false
}
let lhsBytesCount = lhsBytesPerRow * lhsHeight
let rhsBytesCount = rhsBytesPerRow * rhsHeight
let lhsBytesRange = NSRange(location: 0, length: lhsBytesCount)
let rhsBytesRange = NSRange(location: 0, length: rhsBytesCount)
return CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsFormat!= rhsFormat {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
if lhsWidth!= rhsWidth {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
if lhsHeight!= rhsHeight {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
if lhsBytesPerRow!= rhsBytesPerRow {
return false
}
let lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
let rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
let lhsBytesPerPixel = CVPixelBufferGetBytesPerRow(lhs) / CVPixelBufferGetWidth(lhs)
let rhsBytesPerPixel = CVPixelBufferGetBytesPerRow(rhs) / CVPixelBufferGetWidth(rhs)
if lhsBytesPerPixel!= rhsBytesPerPixel {
return false
}
let lhsBytes = CVPixelBufferGetBaseAddress(lhs)
let rhsBytes = CVPixelBufferGetBaseAddress(rhs)
if lhsBytes == rhsBytes {
return true
}
if lhsBytes == nil || rhsBytes == nil {
return false
}
let lhsBytesCount = lhsBytesPerRow * lhsHeight
let rhsBytesCount = rhsBytesPerRow * rhsHeight
let lhsBytesRange = NSRange(location: 0, length: lhsBytesCount)
let rhsBytesRange = NSRange(location: 0, length: rhsBytesCount)
return CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo
}
```if lhsFormat!= rhsFormat { // '=' must have consistent whitespace on both sidesif lhsFormat!= rhsFormat { // use of '=' in a boolean context, did you mean '=='?if lhsFormat!= rhsFormat { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if lhsWidth!= rhsWidth { // cannot force unwrap value of non-optional type 'Int'if lhsWidth!= rhsWidth { // '=' must have consistent whitespace on both sidesif lhsWidth!= rhsWidth { // use of '=' in a boolean context, did you mean '=='?if lhsHeight!= rhsHeight { // use of '=' in a boolean context, did you mean '=='?if lhsHeight!= rhsHeight { // cannot force unwrap value of non-optional type 'Int'if lhsHeight!= rhsHeight { // '=' must have consistent whitespace on both sidesif lhsBytesPerRow!= rhsBytesPerRow { // use of '=' in a boolean context, did you mean '=='?if lhsBytesPerRow!= rhsBytesPerRow { // '=' must have consistent whitespace on both sidesif lhsBytesPerRow!= rhsBytesPerRow { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize { // use of '=' in a boolean context, did you mean '=='?if lhsBytesPerPixel!= rhsBytesPerPixel { // '=' must have consistent whitespace on both sidesif lhsBytesPerPixel!= rhsBytesPerPixel { // use of '=' in a boolean context, did you mean '=='?if lhsBytesPerPixel!= rhsBytesPerPixel { // cannot force unwrap value of non-optional type 'Int'return CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo // cannot find 'CFDataCompare' in scopereturn CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo // cannot infer contextual base in reference to member 'compareEqualTo'return CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo // consecutive statements on a line must be separated by ';'return CFDataCompare(lhsBytes, rhsBytes, lhsBytesRange, rhsBytesRange) ==.compareEqualTo // '==' is not a prefix unary operatorimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
guard lhs.width == rhs.width && lhs.height == rhs.height else { return false }
guard lhs.pixelFormat == rhs.pixelFormat else { return false }
guard lhs.baseAddress!= nil else { return false }
guard lhs.baseAddress == rhs.baseAddress else { return false }
return true
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
guard lhs.width == rhs.width && lhs.height == rhs.height else { return false }
guard lhs.pixelFormat == rhs.pixelFormat else { return false }
guard lhs.baseAddress!= nil else { return false }
guard lhs.baseAddress == rhs.baseAddress else { return false }
return true
}
```guard lhs.width == rhs.width && lhs.height == rhs.height else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'guard lhs.width == rhs.width && lhs.height == rhs.height else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'guard lhs.width == rhs.width && lhs.height == rhs.height else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'guard lhs.width == rhs.width && lhs.height == rhs.height else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'guard lhs.pixelFormat == rhs.pixelFormat else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormat'guard lhs.pixelFormat == rhs.pixelFormat else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormat'guard lhs.baseAddress!= nil else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'guard lhs.baseAddress!= nil else { return false } // 'nil' requires a contextual typeguard lhs.baseAddress!= nil else { return false } // '=' must have consistent whitespace on both sidesguard lhs.baseAddress!= nil else { return false } // use of '=' in a boolean context, did you mean '=='?guard lhs.baseAddress == rhs.baseAddress else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'guard lhs.baseAddress == rhs.baseAddress else { return false } // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsFormat!= rhsFormat {
return false
}
var lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
var rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
if lhsBytesPerRow!= rhsBytesPerRow {
return false
}
var lhsData = UnsafeMutablePointer<UInt8>.allocate(capacity: lhsSize)
var rhsData = UnsafeMutablePointer<UInt8>.allocate(capacity: rhsSize)
CVPixelBufferLockBaseAddress(lhs,.readOnly)
CVPixelBufferLockBaseAddress(rhs,.readOnly)
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
memcpy(lhsData, lhsBaseAddress, lhsSize)
memcpy(rhsData, rhsBaseAddress, rhsSize)
CVPixelBufferUnlockBaseAddress(lhs,.readOnly)
CVPixelBufferUnlockBaseAddress(rhs,.readOnly)
var result = true
for i in 0..<lhsSize {
if lhsData[i]!= rhsData[i] {
result = false
break
}
}
lhsData.deallocate()
rhsData.deallocate()
return result
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsFormat!= rhsFormat {
return false
}
var lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
var rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
if lhsBytesPerRow!= rhsBytesPerRow {
return false
}
var lhsData = UnsafeMutablePointer<UInt8>.allocate(capacity: lhsSize)
var rhsData = UnsafeMutablePointer<UInt8>.allocate(capacity: rhsSize)
CVPixelBufferLockBaseAddress(lhs,.readOnly)
CVPixelBufferLockBaseAddress(rhs,.readOnly)
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
memcpy(lhsData, lhsBaseAddress, lhsSize)
memcpy(rhsData, rhsBaseAddress, rhsSize)
CVPixelBufferUnlockBaseAddress(lhs,.readOnly)
CVPixelBufferUnlockBaseAddress(rhs,.readOnly)
var result = true
for i in 0..<lhsSize {
if lhsData[i]!= rhsData[i] {
result = false
break
}
}
lhsData.deallocate()
rhsData.deallocate()
return result
}
```if lhsSize!= rhsSize { // use of '=' in a boolean context, did you mean '=='?if lhsSize!= rhsSize { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize { // '=' must have consistent whitespace on both sidesif lhsFormat!= rhsFormat { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if lhsFormat!= rhsFormat { // '=' must have consistent whitespace on both sidesif lhsFormat!= rhsFormat { // use of '=' in a boolean context, did you mean '=='?if lhsBytesPerRow!= rhsBytesPerRow { // use of '=' in a boolean context, did you mean '=='?if lhsBytesPerRow!= rhsBytesPerRow { // cannot force unwrap value of non-optional type 'Int'if lhsBytesPerRow!= rhsBytesPerRow { // '=' must have consistent whitespace on both sidesif lhsData[i]!= rhsData[i] { // '=' must have consistent whitespace on both sidesif lhsData[i]!= rhsData[i] { // cannot force unwrap value of non-optional type 'UInt8'if lhsData[i]!= rhsData[i] { // use of '=' in a boolean context, did you mean '=='?import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferIsEqual(lhs, rhs)
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferIsEqual(lhs, rhs)
}
```return CVPixelBufferIsEqual(lhs, rhs) // cannot find 'CVPixelBufferIsEqual' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferGetWidth(lhs) == CVPixelBufferGetWidth(rhs) &&
CVPixelBufferGetHeight(lhs) == CVPixelBufferGetHeight(rhs) &&
CVPixelBufferGetPixelFormatType(lhs) == CVPixelBufferGetPixelFormatType(rhs) &&
CVPixelBufferGetBaseAddress(lhs) == CVPixelBufferGetBaseAddress(rhs)
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferGetWidth(lhs) == CVPixelBufferGetWidth(rhs) &&
CVPixelBufferGetHeight(lhs) == CVPixelBufferGetHeight(rhs) &&
CVPixelBufferGetPixelFormatType(lhs) == CVPixelBufferGetPixelFormatType(rhs) &&
CVPixelBufferGetBaseAddress(lhs) == CVPixelBufferGetBaseAddress(rhs)
}
``` // XCTAssertFalse failedimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize: CMVideoDimensions = CMVideoDimensions()
var rhsSize: CMVideoDimensions = CMVideoDimensions()
var lhsFormat: CMFormatDescription = CMFormatDescription()
var rhsFormat: CMFormatDescription = CMFormatDescription()
CVPixelBufferGetDimensions(lhs, &lhsSize)
CVPixelBufferGetDimensions(rhs, &rhsSize)
CVPixelBufferGetFormatDescription(lhs, &lhsFormat)
CVPixelBufferGetFormatDescription(rhs, &rhsFormat)
return lhsSize == rhsSize && lhsFormat == rhsFormat
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize: CMVideoDimensions = CMVideoDimensions()
var rhsSize: CMVideoDimensions = CMVideoDimensions()
var lhsFormat: CMFormatDescription = CMFormatDescription()
var rhsFormat: CMFormatDescription = CMFormatDescription()
CVPixelBufferGetDimensions(lhs, &lhsSize)
CVPixelBufferGetDimensions(rhs, &rhsSize)
CVPixelBufferGetFormatDescription(lhs, &lhsFormat)
CVPixelBufferGetFormatDescription(rhs, &rhsFormat)
return lhsSize == rhsSize && lhsFormat == rhsFormat
}
```var lhsSize: CMVideoDimensions = CMVideoDimensions() // cannot find type 'CMVideoDimensions' in scopevar rhsSize: CMVideoDimensions = CMVideoDimensions() // cannot find type 'CMVideoDimensions' in scopevar lhsFormat: CMFormatDescription = CMFormatDescription() // cannot find type 'CMFormatDescription' in scopevar rhsFormat: CMFormatDescription = CMFormatDescription() // cannot find type 'CMFormatDescription' in scopeCVPixelBufferGetDimensions(lhs, &lhsSize) // cannot find 'CVPixelBufferGetDimensions' in scopeCVPixelBufferGetDimensions(rhs, &rhsSize) // cannot find 'CVPixelBufferGetDimensions' in scopeCVPixelBufferGetFormatDescription(lhs, &lhsFormat) // cannot find 'CVPixelBufferGetFormatDescription' in scopeCVPixelBufferGetFormatDescription(rhs, &rhsFormat) // cannot find 'CVPixelBufferGetFormatDescription' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferGetWidth(lhs) == CVPixelBufferGetWidth(rhs) &&
CVPixelBufferGetHeight(lhs) == CVPixelBufferGetHeight(rhs) &&
CVPixelBufferGetPixelFormatType(lhs) == CVPixelBufferGetPixelFormatType(rhs) &&
CVPixelBufferLockBaseAddress(lhs,.readOnly) == 0 &&
CVPixelBufferLockBaseAddress(rhs,.readOnly) == 0 &&
CVPixelBufferGetBaseAddress(lhs) == CVPixelBufferGetBaseAddress(rhs)
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return CVPixelBufferGetWidth(lhs) == CVPixelBufferGetWidth(rhs) &&
CVPixelBufferGetHeight(lhs) == CVPixelBufferGetHeight(rhs) &&
CVPixelBufferGetPixelFormatType(lhs) == CVPixelBufferGetPixelFormatType(rhs) &&
CVPixelBufferLockBaseAddress(lhs,.readOnly) == 0 &&
CVPixelBufferLockBaseAddress(rhs,.readOnly) == 0 &&
CVPixelBufferGetBaseAddress(lhs) == CVPixelBufferGetBaseAddress(rhs)
}
``` // XCTAssertTrue failedimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
return lhsFormat == rhsFormat && lhsWidth == rhsWidth && lhsHeight == rhsHeight
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhs)
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
return lhsFormat == rhsFormat && lhsWidth == rhsWidth && lhsHeight == rhsHeight
}
``` // XCTAssertFalse failedimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
let rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
let lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
return lhsSize == rhsSize && lhsPixelFormat == rhsPixelFormat && lhsBytesPerRow == rhsBytesPerRow && lhsData == rhsData
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
let rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
let lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
let rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
return lhsSize == rhsSize && lhsPixelFormat == rhsPixelFormat && lhsBytesPerRow == rhsBytesPerRow && lhsData == rhsData
}
``` // XCTAssertFalse failedstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}
```let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typestruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}
```let publicItem = PublicItem(value: pointer.pointee.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}
```let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typestruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}
```let publicItem = PublicItem(value: pointer.pointee.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}
let items = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: items)
print(publicItems)
```let publicItem = PublicItem(value: pointer.pointee.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque())
return PublicItem(value: pointer.assumingMemoryBound(to: PrivateItem.self).pointee.value)
}
}
```let pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typelet pointer = UnsafeRawPointer(Unmanaged.passUnretained($0).toOpaque()) // generic struct 'Unmanaged' requires that 'PrivateItem' be a class typestruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: 1)
pointer.initialize(to: $0)
let publicItem = PublicItem(value: pointer.pointee.value)
pointer.deinitialize(count: 1)
pointer.deallocate(capacity: 1)
return publicItem
}
}
```let publicItem = PublicItem(value: pointer.pointee.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
func copy(items: [PrivateItem]) -> [PublicItem] {
return items.map {
var item = $0
return PublicItem(value: item.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by copying the memory of the structs into a new array of public structs.
func copy(items: [PrivateItem]) -> [PublicItem] {
return items.map {
var item = $0
return PublicItem(value: item.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelreturn PublicItem(value: item.value) // 'value' is inaccessible due to 'private' protection levelenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version strings into an array of components.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of both version strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the components to integers.
let lhsInt = Int(lhsComponent)?? 0
let rhsInt = Int(rhsComponent)?? 0
// Compare the two integers.
switch lhsInt.compare(rhsInt) {
case.orderedSame:
// If the integers are the same, continue to the next component.
continue
case.orderedAscending:
// If the left-hand side is less than the right-hand side, return.orderedAscending.
return.orderedAscending
case.orderedDescending:
// If the left-hand side is greater than the right-hand side, return.orderedDescending.
return.orderedDescending
}
}
// If the two version strings are equal, return.orderedSame.
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version strings into an array of components.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of both version strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the components to integers.
let lhsInt = Int(lhsComponent)?? 0
let rhsInt = Int(rhsComponent)?? 0
// Compare the two integers.
switch lhsInt.compare(rhsInt) {
case.orderedSame:
// If the integers are the same, continue to the next component.
continue
case.orderedAscending:
// If the left-hand side is less than the right-hand side, return.orderedAscending.
return.orderedAscending
case.orderedDescending:
// If the left-hand side is greater than the right-hand side, return.orderedDescending.
return.orderedDescending
}
}
// If the two version strings are equal, return.orderedSame.
return.orderedSame
}
```let lhsInt = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let lhsInt = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsInt = Int(lhsComponent)?? 0 // integer literal is unusedlet rhsInt = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsInt = Int(rhsComponent)?? 0 // integer literal is unusedlet rhsInt = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
let lhsInt = Int(lhsComponent)?? 0
let rhsInt = Int(rhsComponent)?? 0
if lhsInt > rhsInt {
return.orderedDescending
} else if lhsInt < rhsInt {
return.orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
}
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
let lhsInt = Int(lhsComponent)?? 0
let rhsInt = Int(rhsComponent)?? 0
if lhsInt > rhsInt {
return.orderedDescending
} else if lhsInt < rhsInt {
return.orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
}
return.orderedSame
}
// Usage example:
let result = compareVersions("1.0.0", "1.0.0")
```let lhsInt = Int(lhsComponent)?? 0 // integer literal is unusedlet lhsInt = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsInt = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsInt = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let rhsInt = Int(rhsComponent)?? 0 // integer literal is unusedlet rhsInt = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version strings into an array of components
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of both version strings
for i in 0..<max(lhsComponents.count, rhsComponents.count) {
// Get the component values of the current index
let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0
let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0
// Compare the component values
if lhsValue < rhsValue {
return.orderedAscending
} else if lhsValue > rhsValue {
return.orderedDescending
}
}
// If all components are equal, the version strings are equal
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version strings into an array of components
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of both version strings
for i in 0..<max(lhsComponents.count, rhsComponents.count) {
// Get the component values of the current index
let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0
let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0
// Compare the component values
if lhsValue < rhsValue {
return.orderedAscending
} else if lhsValue > rhsValue {
return.orderedDescending
}
}
// If all components are equal, the version strings are equal
return.orderedSame
}
```let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // cannot use optional chaining on non-optional value of type 'Int'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // consecutive statements on a line must be separated by ';'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // consecutive statements on a line must be separated by ';'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // cannot use optional chaining on non-optional value of type 'Int'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // consecutive statements on a line must be separated by ';'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'let lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // integer literal is unusedlet lhsValue = lhsComponents.count > i? Int(lhsComponents[i])?? 0 : 0 // expected expressionlet rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // integer literal is unusedlet rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // consecutive statements on a line must be separated by ';'let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsValue = rhsComponents.count > i? Int(rhsComponents[i])?? 0 // consecutive statements on a line must be separated by ';'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
let lhsValue = Int(lhsComponent)?? 0
let rhsValue = Int(rhsComponent)?? 0
if lhsValue > rhsValue {
return.orderedDescending
} else if lhsValue < rhsValue {
return.orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
}
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
let lhsValue = Int(lhsComponent)?? 0
let rhsValue = Int(rhsComponent)?? 0
if lhsValue > rhsValue {
return.orderedDescending
} else if lhsValue < rhsValue {
return.orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
}
return.orderedSame
}
// Test cases
compareVersions("1.0", "1.0")
compareVersions("1.0", "1.1")
compareVersions("1.1", "1.0")
compareVersions("1.1", "1.1")
compareVersions("1.1.0", "1.1")
compareVersions("1.1", "1.1.0")
compareVersions("1.1.0", "1.1.0")
compareVersions("1.1.0", "1.1.0.0")
compareVersions("1.1.0.0", "1.1.0")
compareVersions("1.1.0", "1.1.0.0.0")
compareVersions("1.1.0.0.0", "1.1.0.0")
compareVersions("1.1.0.0.0", "1.1.0.0.0")
compareVersions("1.1.0.0.0", "1.1.0.0.0.0")
compareVersions("1.1.0.0.0.0", "1.1.0.0.0.0")
compareVersions("1.1.0.0.0.0", "1.1.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0", "1.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0")
compareVersions("1.1.0.0.0.0.0",let lhsValue = Int(lhsComponent)?? 0 // integer literal is unusedlet lhsValue = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsValue = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsValue = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsValue = Int(rhsComponent)?? 0 // integer literal is unusedlet rhsValue = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of strings, each containing a single version number component.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the version number components, comparing each pair of components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the version number components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the version number components.
if lhsComponentInt > rhsComponentInt {
return.orderedDescending
} else if lhsComponentInt < rhsComponentInt {
return.orderedAscending
}
}
// If all version number components are equal, the version numbers are considered to be equal.
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of strings, each containing a single version number component.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the version number components, comparing each pair of components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the version number components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the version number components.
if lhsComponentInt > rhsComponentInt {
return.orderedDescending
} else if lhsComponentInt < rhsComponentInt {
return.orderedAscending
}
}
// If all version number components are equal, the version numbers are considered to be equal.
return.orderedSame
}
```let lhsComponentInt = Int(lhsComponent)?? 0 // integer literal is unusedlet lhsComponentInt = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsComponentInt = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let rhsComponentInt = Int(rhsComponent)?? 0 // integer literal is unusedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt > rhsInt {
return.orderedDescending
} else if lhsInt < rhsInt {
return.orderedAscending
}
} else {
if lhsComponent > rhsComponent {
return.orderedDescending
} else if lhsComponent < rhsComponent {
return.orderedAscending
}
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
} else {
return.orderedSame
}
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = lhsComponents[i]
let rhsComponent = rhsComponents[i]
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt > rhsInt {
return.orderedDescending
} else if lhsInt < rhsInt {
return.orderedAscending
}
} else {
if lhsComponent > rhsComponent {
return.orderedDescending
} else if lhsComponent < rhsComponent {
return.orderedAscending
}
}
}
if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return.orderedAscending
} else {
return.orderedSame
}
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of components.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of the version number strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the components.
if lhsComponentInt < rhsComponentInt {
return.orderedAscending
} else if lhsComponentInt > rhsComponentInt {
return.orderedDescending
}
}
// If all components are equal, the version numbers are equal.
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of components.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the components of the version number strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the components.
if lhsComponentInt < rhsComponentInt {
return.orderedAscending
} else if lhsComponentInt > rhsComponentInt {
return.orderedDescending
}
}
// If all components are equal, the version numbers are equal.
return.orderedSame
}
// Test cases.
print(compareVersions("1.0", "1.0")) // orderedSame
print(compareVersions("1.0", "1.0.1")) // orderedAscending
print(compareVersions("1.0.1", "1.0")) // orderedDescending
print(compareVersions("1.0", "1.0.1.1")) // orderedAscending
print(compareVersions("1.0.1.1", "1.0.1")) // orderedDescending
print(compareVersions("1.0.1", "1.0.1.1")) // orderedAscending
print(compareVersions("1.0.1.1", "1.0.1.1")) // orderedSame
print(compareVersions("1.0.1.1", "1.0.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1", "1.0.1.1")) // orderedDescending
print(compareVersions("1.0.1.1", "1.0.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1", "1.0.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1", "1.0.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1", "1.0.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1", "1.0.1.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1.1", "1.0.1.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1.1.1.1")) // orderedAscending
print(compareVersions("1.0.1.1.1.1.1.1.1.1.1.1", "1.0.1.1.1.1.1.1.1.1.1")) // orderedDescending
print(compareVersions("1.0.1.1.1.1.1.1.1.let lhsComponentInt = Int(lhsComponent)?? 0 // integer literal is unusedlet lhsComponentInt = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsComponentInt = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let rhsComponentInt = Int(rhsComponent)?? 0 // integer literal is unusedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of strings, each representing a version number component.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the version number components, comparing each pair of components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the version number components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the version number components.
if lhsComponentInt < rhsComponentInt {
return.orderedAscending
} else if lhsComponentInt > rhsComponentInt {
return.orderedDescending
}
}
// If all version number components are equal, the version numbers are considered equal.
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split the version number strings into an array of strings, each representing a version number component.
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
// Iterate over the version number components, comparing each pair of components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// Convert the version number components to integers.
let lhsComponentInt = Int(lhsComponent)?? 0
let rhsComponentInt = Int(rhsComponent)?? 0
// Compare the version number components.
if lhsComponentInt < rhsComponentInt {
return.orderedAscending
} else if lhsComponentInt > rhsComponentInt {
return.orderedDescending
}
}
// If all version number components are equal, the version numbers are considered equal.
return.orderedSame
}
// Test cases
let result1 = compareVersions("1.0.0", "1.0.0")
let result2 = compareVersions("1.0.0", "1.0.1")
let result3 = compareVersions("1.0.0", "1.1.0")
let result4 = compareVersions("1.0.0", "2.0.0")
let result5 = compareVersions("1.0.0", "1.1.0")
let result6 = compareVersions("1.0.0", "1.0.1")
let result7 = compareVersions("1.0.0-alpha", "1.0.0")
let result8 = compareVersions("1.0.0-alpha", "1.0.0-beta")
let result9 = compareVersions("1.0.0-alpha", "1.0.0-alpha.1")
let result10 = compareVersions("1.0.0-alpha.1", "1.0.0-alpha.beta")
let result11 = compareVersions("1.0.0-beta", "1.0.0-beta.2")
let result12 = compareVersions("1.0.0-beta.2", "1.0.0-beta.11")
let result13 = compareVersions("1.0.0-beta.11", "1.0.0-rc.1")
let result14 = compareVersions("1.0.0-rc.1", "1.0.0")
```let lhsComponentInt = Int(lhsComponent)?? 0 // integer literal is unusedlet lhsComponentInt = Int(lhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let lhsComponentInt = Int(lhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponentInt = Int(rhsComponent)?? 0 // consecutive statements on a line must be separated by ';'let rhsComponentInt = Int(rhsComponent)?? 0 // integer literal is unusedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = Int(lhsComponents[i])?? 0
let rhsComponent = Int(rhsComponents[i])?? 0
if lhsComponent > rhsComponent {
return.orderedDescending
} else if lhsComponent < rhsComponent {
return.orderedAscending
}
}
if lhsComponents.count == rhsComponents.count {
return.orderedSame
} else if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else {
return.orderedAscending
}
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
let lhsComponent = Int(lhsComponents[i])?? 0
let rhsComponent = Int(rhsComponents[i])?? 0
if lhsComponent > rhsComponent {
return.orderedDescending
} else if lhsComponent < rhsComponent {
return.orderedAscending
}
}
if lhsComponents.count == rhsComponents.count {
return.orderedSame
} else if lhsComponents.count > rhsComponents.count {
return.orderedDescending
} else {
return.orderedAscending
}
}
// Test cases
compareVersions("1.0.0", "1.0.0")
compareVersions("1.0.0", "1.0.1")
compareVersions("1.0.0", "1.1.0")
compareVersions("1.0.0", "1.1.1")
compareVersions("1.0.0", "1.2.0")
compareVersions("1.0.0", "1.2.1")
compareVersions("1.0.0", "1.2.2")
compareVersions("1.0.0", "1.3.0")
compareVersions("1.0.0", "1.3.1")
compareVersions("1.0.0", "1.4.0")
compareVersions("1.0.0", "1.4.1")
compareVersions("1.0.0", "1.5.0")
compareVersions("1.0.0", "1.5.1")
compareVersions("1.0.0", "1.6.0")
compareVersions("1.0.0", "1.6.1")
compareVersions("1.0.0", "1.7.0")
compareVersions("1.0.0", "1.7.1")
compareVersions("1.0.0", "1.8.0")
compareVersions("1.0.0", "1.8.1")
compareVersions("1.0.0", "1.9.0")
compareVersions("1.0.0", "1.9.1")
compareVersions("1.0.0", "1.10.0")
compareVersions("1.0.0", "1.10.1")
compareVersions("1.0.0", "1.11.0")
compareVersions("1.0.0", "1.11.1")
compareVersions("1.0.0", "1.12.0")
compareVersions("1.0.0", "1.12.1")
compareVersions("1.0.0", "1.13.0")
compareVersions("1.0.0", "1.13.1")
compareVersions("1.0.0", "1.14.0")
compareVersions("1.0.0", "1.14.1")
compareVersions("1.0.0", "1.15.0")
compareVersions("1.0.0", "1.15.1")
compareVersions("1.0.0", "1.16.0")
compareVersions("1.0.0", "1.16.1")
compareVersions("1.0.0", "1.17.0")
compareVersions("1.0.0", "1.17.1")
compareVersions("1.0.0", "1.18.0")
compareVersions("1.0.0", "1.18.1")
compareVersions("1.0.0", "1.19.0")
compareVersions("1.0.0", "1.19.1")
compareVersions("1.0.0", "1.20.0")
compareVersions("1.0.0", "1.20.1")
compareVersions("1.0.0", "1.21.0")
compareVersions("1.0.0", "1.21.1")
compareVersions("1.0.0", "1.22.0")
compareVersions("1.0.0", "1.22.1")
compareVersions("1.0.0", "1.23.0")
compareVersions("1.0.let lhsComponent = Int(lhsComponents[i])?? 0 // integer literal is unusedlet lhsComponent = Int(lhsComponents[i])?? 0 // cannot use optional chaining on non-optional value of type 'Int'let lhsComponent = Int(lhsComponents[i])?? 0 // consecutive statements on a line must be separated by ';'let rhsComponent = Int(rhsComponents[i])?? 0 // integer literal is unusedlet rhsComponent = Int(rhsComponents[i])?? 0 // cannot use optional chaining on non-optional value of type 'Int'let rhsComponent = Int(rhsComponents[i])?? 0 // consecutive statements on a line must be separated by ';'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
var lhsVersion = [Int]()
var rhsVersion = [Int]()
for (index, component) in lhsComponents.enumerated() {
if let lhsVersionComponent = Int(component) {
lhsVersion.append(lhsVersionComponent)
} else {
lhsVersion.append(0)
}
if let rhsVersionComponent = rhsComponents.count > index? Int(rhsComponents[index]) : nil {
rhsVersion.append(rhsVersionComponent)
} else {
rhsVersion.append(0)
}
}
for (index, lhsVersionComponent) in lhsVersion.enumerated() {
if index >= rhsVersion.count {
return.orderedDescending
}
if lhsVersionComponent > rhsVersion[index] {
return.orderedDescending
} else if lhsVersionComponent < rhsVersion[index] {
return.orderedAscending
}
}
return.orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
var lhsVersion = [Int]()
var rhsVersion = [Int]()
for (index, component) in lhsComponents.enumerated() {
if let lhsVersionComponent = Int(component) {
lhsVersion.append(lhsVersionComponent)
} else {
lhsVersion.append(0)
}
if let rhsVersionComponent = rhsComponents.count > index? Int(rhsComponents[index]) : nil {
rhsVersion.append(rhsVersionComponent)
} else {
rhsVersion.append(0)
}
}
for (index, lhsVersionComponent) in lhsVersion.enumerated() {
if index >= rhsVersion.count {
return.orderedDescending
}
if lhsVersionComponent > rhsVersion[index] {
return.orderedDescending
} else if lhsVersionComponent < rhsVersion[index] {
return.orderedAscending
}
}
return.orderedSame
}
```if let rhsVersionComponent = rhsComponents.count > index? Int(rhsComponents[index]) : nil { // expected '{' after 'if' conditionif let rhsVersionComponent = rhsComponents.count > index? Int(rhsComponents[index]) : nil { // value of optional type 'Int?' must be unwrapped to a value of type 'Int'if let rhsVersionComponent = rhsComponents.count > index? Int(rhsComponents[index]) : nil { // cannot use optional chaining on non-optional value of type 'Int'