Metadata
| Key | Value |
|---|---|
| engine | transformers |
| 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// Usage
do {
let json = try parse(string: "{\"name\": \"John\"}")
print(json)
let string = try serialize(json: json)
print(string)
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// Example usage
do {
let json = try parse(string: "{\"key\": \"value\"}")
print(json)
let string = try serialize(json: json)
print(string)
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// Usage
do {
let json = try parse(string: "{\"key\": \"value\"}")
print(json)
let string = try serialize(json: json)
print(string)
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
func prettyPrint(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [.prettyPrinted])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
func validate(json: JSON) throws {
do {
let _ = try JSONSerialization.data(withJSONObject: json, options: [])
} catch {
throw ParsingError.internalError(error)
}
}
func merge(json1: JSON, with json2: JSON) throws -> JSON {
do {
let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
let data = try JSONSerialization.data(withJSONObject: [data1, data2], options: [])
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// JSON pretty printer, returns custom error type in case of failures.
func prettyPrint(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [.prettyPrinted])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
do {
let _ = try JSONSerialization.data(withJSONObject: json, options: [])
} catch {
throw ParsingError.internalError(error)
}
}
// JSON merger, returns custom error type in case of failures.
func merge(json1: JSON, with json2: JSON) throws -> JSON {
do {
let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
let data = try JSONSerialization.data(withJSONObject: [data1, data2], options: [])
return try JSONSerialization.jsonObject(with: data, options: []) 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
func encode(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
func encode(json: JSON) throws -> Data {
do {
return try JSONSerialization.data(withJSONObject: json, options: [])
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as? JSON ?? [:]
} catch {
throw ParsingError.internalError(error)
}
}
// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> Data {
do {
return try JSONSerialization.data(withJSONObject: json, options: [])
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} 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 {
return try JSONSerialization.jsonObject(with: data, options: []) as! JSON
} catch {
throw ParsingError.internalError(error)
}
}
// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
do {
let data = try JSONSerialization.data(withJSONObject: json, options: [])
return String(data: data, encoding: .utf8) ?? ""
} catch {
throw ParsingError.internalError(error)
}
}
```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: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.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)\""
}
if children.isEmpty {
result += "/>"
} else {
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)\""
}
if children.isEmpty {
result += "/>"
} else {
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"])
])
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 node = HTMLNode.element("div", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Swifteval")
])
])
print(generate(node))
```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 html = HTMLNode.element("div", attributes: ["id": "container"], children: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.text("SwiftEval")
])
])
print(generate(html))
```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)\""
}
if children.isEmpty {
result += "/>"
} else {
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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
}
return result
}
}
// Example of usage
let html = HTMLNode.element("div", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Swifteval")
])
])
print(generate(html))
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case let .text(content):
return content
case let .element(name, attributes, 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 let .text(content):
return content
case let .element(name, attributes, 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"],
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
}
}
// Example of usage
let node = HTMLNode.element("div", attributes: ["class": "container"], children: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.text("Swifteval")
])
])
print(generate(node))
```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)\""
}
if children.isEmpty {
result += "/>"
} else {
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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
for child in children {
result += generate(child)
}
result += "</\(name)>"
}
return result
}
}
// Usage
let tree = HTMLNode.element("div", attributes: ["id": "main"], 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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
result += children.map(generate).joined()
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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
result += children.map(generate).joined()
result += "</\(name)>"
}
return result
}
}
// Usage
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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
result += children.map(generate).joined()
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)\""
}
if children.isEmpty {
result += "/>"
} else {
result += ">"
result += children.map(generate).joined()
result += "</\(name)>"
}
return result
}
}
// Example of usage
let tree = HTMLNode.element("div", attributes: ["class": "container"], children: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.text("Swifteval")
])
])
print(generate(tree))
```enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: CharacterSet.whitespacesAndNewlines)
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(value)
case "+", "-", "*", "/":
guard let value1 = stack.popLast(), let value2 = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(value1, value2, token)
stack.append(result)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ value1: Double, _ value2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return value1 + value2
case "-":
return value1 - value2
case "*":
return value1 * value2
case "/":
return value1 / value2
default:
throw CalculateError.invalidInput
}
}```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: CharacterSet.whitespacesAndNewlines)
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
stack.append(value)
case "+", "-", "*", "/":
guard let value1 = stack.popLast(), let value2 = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(value1, value2, token)
stack.append(result)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
// Calculate two values with given operator.
func calculate(_ value1: Double, _ value2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return value1 + value2
case "-":
return value1 - value2
case "*":
return value1 * value2
case "/":
return value1 / value2
default:
throw CalculateError.invalidInput
}
}
```switch operator { // expected operator name in operator declarationswitch operator { // expected expression in 'switch' statementenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// Remove all spaces.
let input = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid.
if input.isEmpty || !input.isValid {
throw CalculateError.invalidInput
}
// Convert input to postfix notation.
let postfix = try input.toPostfix()
// Calculate result.
let result = try postfix.calculate()
return result
}
extension String {
// Check if input is valid.
var isValid: Bool {
let tokens = self.tokens
let operators = tokens.filter { $0.isOperator }
let operands = tokens.filter { $0.isOperand }
// Check if input contains only valid tokens.
if tokens.count != (operators.count + operands.count) {
return false
}
// Check if input contains only valid operators.
if !operators.allSatisfy { $0.isValidOperator } {
return false
}
// Check if input contains only valid operands.
if !operands.allSatisfy { $0.isValidOperand } {
return false
}
// Check if input is balanced.
if !self.isBalanced {
return false
}
return true
}
// Convert input to postfix notation.
func toPostfix() throws -> [String] {
var output = [String]()
var stack = [String]()
for token in self.tokens {
switch token {
case "(":
stack.append(token)
case ")":
while !stack.isEmpty && stack.last != "(" {
output.append(stack.removeLast())
}
if stack.isEmpty {
throw CalculateError.invalidInput
}
stack.removeLast()
case let operand where operand.isOperand:
output.append(operand)
case let operator where operator.isOperator:
while !stack.isEmpty && stack.last.isOperator && stack.last.precedence <= operator.precedence {
output.append(stack.removeLast())
}
stack.append(operator)
default:
throw CalculateError.invalidInput
}
}
while !stack.isEmpty {
if stack.last == "(" {
throw CalculateError.invalidInput
}
output.append(stack.removeLast())
}
return output
}
// Calculate result from postfix notation.
func calculate() throws -> Double {
var output = [Double]()
for token in self.tokens {
switch token {
case let operand where operand.isOperand:
output.append(Double(operand)!)
case let operator where operator.isOperator:
let rhs = output.removeLast()
let lhs = output.removeLast()
output.append(try operator.calculate(lhs, rhs))
default:
throw CalculateError.invalidInput
}
}
return output.first!
}
}```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 {
// Remove all spaces.
let input = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid.
if input.isEmpty || !input.isValid {
throw CalculateError.invalidInput
}
// Convert input to postfix notation.
let postfix = try input.toPostfix()
// Calculate result.
let result = try postfix.calculate()
return result
}
// MARK: - String extension
extension String {
// Check if input is valid.
var isValid: Bool {
let tokens = self.tokens
let operators = tokens.filter { $0.isOperator }
let operands = tokens.filter { $0.isOperand }
// Check if input contains only valid tokens.
if tokens.count != (operators.count + operands.count) {
return false
}
// Check if input contains only valid operators.
if !operators.allSatisfy { $0.isValidOperator } {
return false
}
// Check if input contains only valid operands.
if !operands.allSatisfy { $0.isValidOperand } {
return false
}
// Check if input is balanced.
if !self.isBalanced {
return false
}
return true
}
// Convert input to postfix notation.
func toPostfix() throws -> [String] {
var output = [String]()
var stack = [String]()
for token in self.tokens {
switch token {
case "(":
stack.append(token)
case ")":
while !stack.isEmpty && stack.last != "(" {
output.append(stack.removeLast())
}
if stack.isEmpty {
throw CalculateError.invalidInput
}
stack.removeLast()
case let operand where operand.isOperand:
output.append(operand)
case let operator where operator.isOperator:
while !stack.isEmpty && stack.last.isOperator && stack.last.precedence <= operator.precedence {
output.append(stack.removeLast())
}
stack.append(operator)
default:
throw CalculateError.invalidInput
}
}
while !stack.isEmpty {
if stack.last == "(" {
throw CalculateError.invalidInput
}
output.append(stack.removeLast())
}
return output
}
// Calculate result from postfix notation.
func calculate() throws -> Double {
var output = [Double]()
for token in self.tokens {
switch token {
case let operand where operand.isOperand:
output.append(Double(operand)!)
case let operator where operator.isOperator:
let rhs = output.removeLast()
let lhs = output.removeLast()
output.append(try operator.calculate(lhs, rhs))
default:
throw CalculateError.invalidInput
}
}
return output.first!
}
}
// MARK: - Token extension
extension String {
// Check if token is valid operator.
var isValidOperator: Bool {
return self == "+" || self == "-" || self == "*" || self == "/"
}
// Check if token is valid operand.
var isValidOperand: Bool {
return Double(self) != nil
}
// Check if token is operator.
var isOperator: Bool {
return self.isValidOperator
}
// Check if token is operand.
var isOperand: Bool {
return self.isValidOperand
}
// Get precedence of operator.
var precedence: Int {
switch self {
case "*", "/":
return 2
case "+", "-":
return 1
default:
return 0
}
}
let result = try postfix.calculate() // value of type '[String]' has no member 'calculate'let tokens = self.tokens // value of type 'String' has no member 'tokens'if !self.isBalanced { // value of type 'String' has no member 'isBalanced'for token in self.tokens { // value of type 'String' has no member 'tokens'case let operator where operator.isOperator: // '.' is not allowed in operator namescase let operator where operator.isOperator: // expected ':' after 'case'case let operator where operator.isOperator: // expected patterncase let operator where operator.isOperator: // expected operator name in operator declarationwhile !stack.isEmpty && stack.last.isOperator && stack.last.precedence <= operator.precedence { // expected expression after operatorwhile !stack.isEmpty && stack.last.isOperator && stack.last.precedence <= operator.precedence { // '.' is not allowed in operator namesfor token in self.tokens { // value of type 'String' has no member 'tokens'case let operator where operator.isOperator: // expected operator name in operator declarationcase let operator where operator.isOperator: // expected patterncase let operator where operator.isOperator: // expected ':' after 'case'case let operator where operator.isOperator: // '.' is not allowed in operator namesoutput.append(try operator.calculate(lhs, rhs)) // expected expression in list of expressionsoutput.append(try operator.calculate(lhs, rhs)) // '.' is not allowed in operator namesenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = Stack<Double>()
for token in tokens {
switch token {
case "(":
continue
case ")":
guard let value = stack.pop() else {
throw CalculateError.invalidInput
}
stack.push(value)
case "+", "-", "*", "/":
guard let value1 = stack.pop(),
let value2 = stack.pop() else {
throw CalculateError.invalidInput
}
let result = try calculate(value1, value2, token)
stack.push(result)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.push(value)
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ value1: Double, _ value2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return value1 + value2
case "-":
return value1 - value2
case "*":
return value1 * value2
case "/":
return value1 / value2
default:
throw CalculateError.invalidInput
}
}```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 = Stack<Double>()
for token in tokens {
switch token {
case "(":
continue
case ")":
guard let value = stack.pop() else {
throw CalculateError.invalidInput
}
stack.push(value)
case "+", "-", "*", "/":
guard let value1 = stack.pop(),
let value2 = stack.pop() else {
throw CalculateError.invalidInput
}
let result = try calculate(value1, value2, token)
stack.push(result)
default:
guard let value = Double(token) else {
throw CalculateError.invalidInput
}
stack.push(value)
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
// Calculate two values with given operator.
func calculate(_ value1: Double, _ value2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return value1 + value2
case "-":
return value1 - value2
case "*":
return value1 * value2
case "/":
return value1 / value2
default:
throw CalculateError.invalidInput
}
}
// Test cases
do {
print(try calculate("2+2*2")) // 6.0
print(try calculate("2+2*2*2")) // 12.0
print(try calculate("2+2*2*2*2")) // 20.0
print(try calculate("2+2*2*2*2*2")) // 32.0
print(try calculate("2+2*2*2*2*2*2")) // 52.0
print(try calculate("2+2*2*2*2*2*2*2")) // 88.0
} catch {
print(error)
}
```var stack = Stack<Double>() // cannot find 'Stack' in scopelet result = try calculate(value1, value2, token) // cannot convert value of type 'String.SubSequence' (aka 'Substring') to expected argument type 'String'switch operator { // expected operator name in operator declarationswitch operator { // expected expression in 'switch' statementenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// ...
}
func calculate(_ tokens: [Any]) throws -> Double {
// ...
}```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 {
// ...
}
// Calculator which supports operations from array of tokens.
// Valid tokens is "+-*/()", example input is [2, "+", 2, "*", 2].
func calculate(_ tokens: [Any]) throws -> Double {
// ...
}
```} // missing return in global function expected to return 'Double'} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// Remove all whitespaces.
let string = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid.
guard string.count > 0, string.count <= 100 else {
throw CalculateError.invalidInput
}
// Check if input contains only valid tokens.
let validTokens = CharacterSet(charactersIn: "+-*/()")
guard string.rangeOfCharacter(from: validTokens.inverted) == nil else {
throw CalculateError.invalidInput
}
// Evaluate expression.
let expression = try NSRegularExpression(pattern: "([+-])|([*/])|(\\()|(\\))", options: [])
let matches = expression.matches(in: string, options: [], range: NSRange(location: 0, length: string.count))
var result = 0.0
var index = 0
for match in matches {
let range = match.range
let token = string[range.location..<range.location + range.length]
switch token {
case "+":
result += Double(string[index..<range.location])!
case "-":
result -= Double(string[index..<range.location])!
case "*":
result *= Double(string[index..<range.location])!
case "/":
result /= Double(string[index..<range.location])!
case "(":
index = range.location + 1
case ")":
index = range.location + 1
default:
break
}
}
result += Double(string[index..<string.count])!
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 {
// Remove all whitespaces.
let string = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid.
guard string.count > 0, string.count <= 100 else {
throw CalculateError.invalidInput
}
// Check if input contains only valid tokens.
let validTokens = CharacterSet(charactersIn: "+-*/()")
guard string.rangeOfCharacter(from: validTokens.inverted) == nil else {
throw CalculateError.invalidInput
}
// Evaluate expression.
let expression = try NSRegularExpression(pattern: "([+-])|([*/])|(\\()|(\\))", options: [])
let matches = expression.matches(in: string, options: [], range: NSRange(location: 0, length: string.count))
var result = 0.0
var index = 0
for match in matches {
let range = match.range
let token = string[range.location..<range.location + range.length]
switch token {
case "+":
result += Double(string[index..<range.location])!
case "-":
result -= Double(string[index..<range.location])!
case "*":
result *= Double(string[index..<range.location])!
case "/":
result /= Double(string[index..<range.location])!
case "(":
index = range.location + 1
case ")":
index = range.location + 1
default:
break
}
}
result += Double(string[index..<string.count])!
return result
}
// Test cases.
assert(calculate("2+2*2") == 6)
assert(calculate("2+2*2-1") == 5)
assert(calculate("2+2*2-1+1") == 6)
assert(calculate("2+2*2-1+1*2") == 8)
assert(calculate("2+2*2-1+1*2-3") == 5)
assert(calculate("2+2*2-1+1*2-3+1") == 6)
assert(calculate("2+2*2-1+1*2-3+1*2") == 9)
assert(calculate("2+2*2-1+1*2-3+1*2-1") == 8)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2") == 10)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1") == 9)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2") == 11)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1") == 10)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2") == 12)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2-1") == 11)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2-1+2") == 13)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2-1+2-1") == 12)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2-1+2-1+2") == 14)
assert(calculate("2+2*2-1+1*2-3+1*2-1+2-1+2-1+2-1+2let token = string[range.location..<range.location + range.length] // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.result += Double(string[index..<range.location])! // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.result -= Double(string[index..<range.location])! // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.result *= Double(string[index..<range.location])! // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.result /= Double(string[index..<range.location])! // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.result += Double(string[index..<string.count])! // 'subscript(_:)' is unavailable: cannot subscript String with an integer range, use a String.Index range instead.enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// ...
}
func calculate(_ tokens: [Any]) throws -> Double {
// ...
}```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 {
// ...
}
// Calculator which supports operations from array of tokens.
// Valid tokens is "+-*/()", example input is [2, "+", 2, "*", 2].
func calculate(_ tokens: [Any]) throws -> Double {
// ...
}
```} // missing return in global function expected to return 'Double'} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = Stack<Double>()
for token in tokens {
if let number = Double(token) {
stack.push(number)
} else {
let op1 = stack.pop()
let op2 = stack.pop()
guard let operand1 = op1, let operand2 = op2 else {
throw CalculateError.invalidInput
}
switch token {
case "+":
stack.push(operand1 + operand2)
case "-":
stack.push(operand1 - operand2)
case "*":
stack.push(operand1 * operand2)
case "/":
stack.push(operand1 / operand2)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.pop() 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 = Stack<Double>()
for token in tokens {
if let number = Double(token) {
stack.push(number)
} else {
let op1 = stack.pop()
let op2 = stack.pop()
guard let operand1 = op1, let operand2 = op2 else {
throw CalculateError.invalidInput
}
switch token {
case "+":
stack.push(operand1 + operand2)
case "-":
stack.push(operand1 - operand2)
case "*":
stack.push(operand1 * operand2)
case "/":
stack.push(operand1 / operand2)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
```var stack = Stack<Double>() // cannot find 'Stack' in scopeenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// Remove all whitespaces
let input = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid
guard input.count > 0 else {
throw CalculateError.invalidInput
}
// Check if input is valid
let tokens = input.split(separator: " ")
for token in tokens {
guard token.count > 0 else {
throw CalculateError.invalidInput
}
}
// Convert input to postfix notation
let postfix = try convertToPostfix(tokens)
// Calculate result
return try calculatePostfix(postfix)
}
func convertToPostfix(_ tokens: [String]) throws -> [String] {
var postfix = [String]()
var stack = [String]()
for token in tokens {
switch token {
case "(":
stack.append(token)
case ")":
while let top = stack.last, top != "(" {
postfix.append(top)
stack.removeLast()
}
guard let _ = stack.last else {
throw CalculateError.invalidInput
}
stack.removeLast()
default:
if let priority = priority(token) {
while let top = stack.last, priority <= priority(top) {
postfix.append(top)
stack.removeLast()
}
stack.append(token)
} else {
postfix.append(token)
}
}
}
while let top = stack.last {
postfix.append(top)
stack.removeLast()
}
return postfix
}
func calculatePostfix(_ postfix: [String]) throws -> Double {
var stack = [Double]()
for token in postfix {
switch token {
case "+", "-", "*", "/":
guard let operand2 = stack.popLast(), let operand1 = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(operand1, operand2, token)
stack.append(result)
default:
guard let operand = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(operand)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ operand1: Double, _ operand2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return operand1 + operand2
case "-":
return operand1 - operand2
case "*":
return operand1 * operand2
case "/":
return operand1 / operand2
default:
throw CalculateError.invalidInput
}
}
func priority(_ operator: String) -> Int? {
switch operator {
case "+", "-":
return 1
case "*", "/":
return 2
default:
return nil
}
}```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 {
// Remove all whitespaces
let input = string.replacingOccurrences(of: " ", with: "")
// Check if input is valid
guard input.count > 0 else {
throw CalculateError.invalidInput
}
// Check if input is valid
let tokens = input.split(separator: " ")
for token in tokens {
guard token.count > 0 else {
throw CalculateError.invalidInput
}
}
// Convert input to postfix notation
let postfix = try convertToPostfix(tokens)
// Calculate result
return try calculatePostfix(postfix)
}
// Convert input to postfix notation
func convertToPostfix(_ tokens: [String]) throws -> [String] {
var postfix = [String]()
var stack = [String]()
for token in tokens {
switch token {
case "(":
stack.append(token)
case ")":
while let top = stack.last, top != "(" {
postfix.append(top)
stack.removeLast()
}
guard let _ = stack.last else {
throw CalculateError.invalidInput
}
stack.removeLast()
default:
if let priority = priority(token) {
while let top = stack.last, priority <= priority(top) {
postfix.append(top)
stack.removeLast()
}
stack.append(token)
} else {
postfix.append(token)
}
}
}
while let top = stack.last {
postfix.append(top)
stack.removeLast()
}
return postfix
}
// Calculate result from postfix notation
func calculatePostfix(_ postfix: [String]) throws -> Double {
var stack = [Double]()
for token in postfix {
switch token {
case "+", "-", "*", "/":
guard let operand2 = stack.popLast(), let operand1 = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(operand1, operand2, token)
stack.append(result)
default:
guard let operand = Double(token) else {
throw CalculateError.invalidInput
}
stack.append(operand)
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
// Calculate result from two operands and operator
func calculate(_ operand1: Double, _ operand2: Double, _ operator: String) throws -> Double {
switch operator {
case "+":
return operand1 + operand2
case "-":
return operand1 - operand2
case "*":
return operand1 * operand2
case "/":
return operand1 / operand2
default:
throw CalculateError.invalidInput
}
}
// Get priority of operator
func priority(_ operator: String) -> Int? {
switch operator {
case "+", "-":
return 1
case "*", "/":
return 2
default:
return nil
}
}
```let postfix = try convertToPostfix(tokens) // cannot convert value of type '[String.SubSequence]' (aka 'Array<Substring>') to expected argument type '[String]'while let top = stack.last, priority <= priority(top) { // cannot call value of non-function type 'Int'switch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
// Remove all whitespaces.
let tokens = string.replacingOccurrences(of: " ", with: "").map { String($0) }
// Check if input is valid.
guard tokens.count > 0 else { throw CalculateError.invalidInput }
// Calculate result.
return try tokens.reduce(0) { result, token in
switch token {
case "+":
return result + try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "-":
return result - try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "*":
return result * try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "/":
return result / try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "(":
return try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case ")":
return result
default:
guard let value = Double(token) else { throw CalculateError.invalidInput }
return result + value
}
}
}```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 {
// Remove all whitespaces.
let tokens = string.replacingOccurrences(of: " ", with: "").map { String($0) }
// Check if input is valid.
guard tokens.count > 0 else { throw CalculateError.invalidInput }
// Calculate result.
return try tokens.reduce(0) { result, token in
switch token {
case "+":
return result + try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "-":
return result - try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "*":
return result * try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "/":
return result / try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case "(":
return try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...])
case ")":
return result
default:
guard let value = Double(token) else { throw CalculateError.invalidInput }
return result + value
}
}
}
// Test cases.
assert(calculate("2+2*2") == 6)
assert(calculate("2*2+2") == 6)
assert(calculate("2+2*2*2") == 8)
assert(calculate("2*2+2*2") == 8)
assert(calculate("2*2*2+2") == 8)
assert(calculate("2*2*2*2") == 16)
assert(calculate("2*2*2*2*2") == 32)
assert(calculate("2*2*2*2*2*2") == 64)
assert(calculate("2*2*2*2*2*2*2") == 128)
assert(calculate("2*2*2*2*2*2*2*2") == 256)
assert(calculate("2*2*2*2*2*2*2*2*2") == 512)
assert(calculate("2*2*2*2*2*2*2*2*2*2") == 1024)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2") == 2048)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2") == 4096)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2") == 8192)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 16384)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 32768)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 65536)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 131072)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 262144)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") == 524288)
assert(calculate("2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2") ==return result + try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...]) // 'try' cannot appear to the right of a non-assignment operatorreturn result + try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...]) // cannot convert value of type 'PartialRangeFrom<Int>' to expected argument type 'Int'return result - try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...]) // 'try' cannot appear to the right of a non-assignment operatorreturn result * try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...]) // 'try' cannot appear to the right of a non-assignment operatorreturn result / try calculate(tokens[tokens.index(after: tokens.index(of: token)!)...]) // 'try' cannot appear to the right of a non-assignment operatorenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ")
var stack = [Double]()
for token in tokens {
if let value = Double(token) {
stack.append(value)
} else {
let op = token
guard stack.count >= 2 else {
throw CalculateError.invalidInput
}
let right = stack.popLast()!
let left = stack.popLast()!
switch op {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
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 {
if let value = Double(token) {
stack.append(value)
} else {
let op = token
guard stack.count >= 2 else {
throw CalculateError.invalidInput
}
let right = stack.popLast()!
let left = stack.popLast()!
switch op {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.popLast()!
}
// Test cases
do {
let result = try calculate("2+2*2")
print(result) // 6.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*")
print(result) // 6.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2")
print(result) // 12.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2")
print(result) // 20.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2")
print(result) // 30.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2")
print(result) // 42.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2")
print(result) // 56.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2")
print(result) // 72.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2")
print(result) // 90.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2*2")
print(result) // 110.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2")
print(result) // 132.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*2")
print(result) // 156.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*2*2")
print(result) // 182.0
} catch {
print(error)
}
do {
let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*2*2*2")
print(result) // 210.0
} catch {
print(error)
}
do {
let result = try calculate("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.invalidInputfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let outHandle = pipe.fileHandleForReading
pipe = Pipe()
task.standardError = pipe
let errorHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let errorData = errorHandle.readDataToEndOfFile()
let errorOutput = String(data: errorData, encoding: String.Encoding.utf8)!
task.waitUntilExit()
return (output, errorOutput)
}```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 outHandle = pipe.fileHandleForReading
pipe = Pipe()
task.standardError = pipe
let errorHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let errorData = errorHandle.readDataToEndOfFile()
let errorOutput = String(data: errorData, encoding: String.Encoding.utf8)!
task.waitUntilExit()
return (output, errorOutput)
}
```pipe = Pipe() // cannot assign to value: 'pipe' is a 'let' constantfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let outHandle = pipe.fileHandleForReading
pipe = Pipe()
task.standardError = pipe
let errHandle = pipe.fileHandleForReading
task.launch()
let outData = outHandle.readDataToEndOfFile()
let outString = String(data: outData, encoding: String.Encoding.utf8)
let errData = errHandle.readDataToEndOfFile()
let errString = String(data: errData, encoding: String.Encoding.utf8)
return (outString ?? "", errString ?? "")
}```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 outHandle = pipe.fileHandleForReading
pipe = Pipe()
task.standardError = pipe
let errHandle = pipe.fileHandleForReading
task.launch()
let outData = outHandle.readDataToEndOfFile()
let outString = String(data: outData, encoding: String.Encoding.utf8)
let errData = errHandle.readDataToEndOfFile()
let errString = String(data: errData, encoding: String.Encoding.utf8)
return (outString ?? "", errString ?? "")
}
```pipe = Pipe() // cannot assign to value: 'pipe' is a 'let' constantfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8)!
let errorPipe = Pipe()
task.standardError = errorPipe
let errorHandle = errorPipe.fileHandleForReading
task.waitUntilExit()
let errorData = errorHandle.readDataToEndOfFile()
let errorOutput = String(data: errorData, encoding: .utf8)!
return (output, errorOutput)
}
func execute(binary: String, arguments: [String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments)
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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8)!
let errorPipe = Pipe()
task.standardError = errorPipe
let errorHandle = errorPipe.fileHandleForReading
task.waitUntilExit()
let errorData = errorHandle.readDataToEndOfFile()
let errorOutput = String(data: errorData, encoding: .utf8)!
return (output, errorOutput)
}
// Function to execute binary with arguments.
// Returns stdout.
func execute(binary: String, arguments: [String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments)
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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
task.waitUntilExit()
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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
task.waitUntilExit()
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
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let errorOutput = String(data: errorData, encoding: String.Encoding.utf8)!
return (output, errorOutput)
}```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 errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let errorOutput = String(data: errorData, encoding: String.Encoding.utf8)!
return (output, errorOutput)
}
```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 errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8)
let errorOutput = String(data: errorData, encoding: .utf8)
task.waitUntilExit()
return (output!, errorOutput!)
}```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 errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8)
let errorOutput = String(data: errorData, encoding: .utf8)
task.waitUntilExit()
return (output!, errorOutput!)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.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
let outHandle = pipe.fileHandleForReading
task.launch()
let data = outHandle.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
``` // XCTAssertTrue failedfunc memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = Dictionary<T, U>()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 = Dictionary<T, U>()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = Dictionary<T, U>()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 = Dictionary<T, U>()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = Dictionary<T, U>()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 = Dictionary<T, U>()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = Dictionary<T, U>()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 = Dictionary<T, U>()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { key in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = 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 { (key: T) -> U in
if let result = cache[key] {
return result
} else {
let result = function(key)
cache[key] = result
return result
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
error = error ?? error
}
}
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 {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
error = error ?? error
}
}
throw error!
}
```error = error ?? error // cannot assign to value: 'error' is immutablefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
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 {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
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 {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
error = error ?? error
}
}
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 {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
error = error ?? error
}
}
throw error!
}
```error = error ?? error // cannot assign to value: 'error' is immutablefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
// Usage
do {
let result = try retry(attempts: 3) {
try fetchData()
}
print(result)
} catch {
print(error)
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 1...attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}```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 {
var lastError: Error?
for _ in 0..<attempts {
do {
return try task()
} catch {
lastError = error
}
}
throw lastError!
}
```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) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() 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) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() as? 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: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() 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) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() as? 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? 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: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else {
return nil
}
return factory() 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) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else {
return nil
}
return factory() as? 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? {
guard let factory = factories[ObjectIdentifier(type)] else { return nil }
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else { return nil }
return factory() as? 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
}
class DIContainerWithDependencies: DIContainer {
private var dependencies: [ObjectIdentifier: DIContainer] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
}
class DIContainerWithDependenciesOfDependencies: DIContainerWithDependencies {
private var dependencies: [ObjectIdentifier: DIContainer] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer, DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self, self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer, dependenciesOfDependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
}
// Dependency injection (DI) container with support for
// dependency injection of dependencies.
class DIContainerWithDependencies: DIContainer {
private var dependencies: [ObjectIdentifier: DIContainer] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
}
// Dependency injection (DI) container with support for
// dependency injection of dependencies and for
// dependency injection of dependencies of dependencies.
class DIContainerWithDependenciesOfDependencies: DIContainerWithDependencies {
private var dependencies: [ObjectIdentifier: DIContainer] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
func register<T>(_ type: T.Type, factory: @escaping (DIContainer, DIContainer) -> T) {
factories[ObjectIdentifier(type)] = { [unowned self] in
factory(self, self)
}
}
func resolve<T>(_ type: T.Type, dependencies: DIContainer, dependenciesOfDependencies: DIContainer) -> T? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? T
}
}
```func register<T>(_ type: T.Type, factory: @escaping () -> T) { // overriding declaration requires an 'override' keywordfactories[ObjectIdentifier(type)] = factory // 'factories' is inaccessible due to 'private' protection levelfunc resolve<T>(_ type: T.Type) -> T? { // overriding declaration requires an 'override' keywordguard let factory = factories[ObjectIdentifier(type)] else { // 'factories' is inaccessible due to 'private' protection levelfactories[ObjectIdentifier(type)] = { [unowned self] in // 'factories' is inaccessible due to 'private' protection levelguard let factory = factories[ObjectIdentifier(type)] else { // 'factories' is inaccessible due to 'private' protection levelfunc register<T>(_ type: T.Type, factory: @escaping () -> T) { // overriding declaration requires an 'override' keywordfactories[ObjectIdentifier(type)] = factory // 'factories' is inaccessible due to 'private' protection levelfunc resolve<T>(_ type: T.Type) -> T? { // overriding declaration requires an 'override' keywordguard let factory = factories[ObjectIdentifier(type)] else { // 'factories' is inaccessible due to 'private' protection levelfunc register<T>(_ type: T.Type, factory: @escaping (DIContainer) -> T) { // overriding declaration requires an 'override' keywordfactories[ObjectIdentifier(type)] = { [unowned self] in // 'factories' is inaccessible due to 'private' protection levelfunc resolve<T>(_ type: T.Type, dependencies: DIContainer) -> T? { // overriding declaration requires an 'override' keywordguard let factory = factories[ObjectIdentifier(type)] else { // 'factories' is inaccessible due to 'private' protection levelfactories[ObjectIdentifier(type)] = { [unowned self] in // 'factories' is inaccessible due to 'private' protection levelguard let factory = factories[ObjectIdentifier(type)] else { // 'factories' is inaccessible due to 'private' protection levelprotocol 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else {
return nil
}
return factory() as? 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 = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() 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) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() as? 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? {
guard let factory = factories[ObjectIdentifier(type)] else { return nil }
return factory() 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? {
guard let factory = factories[ObjectIdentifier(type)] else { return nil }
return factory() 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 transitions: [State: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else { return }
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else { return }
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
// Usage
let stateMachine = StateMachine<String, String>(state: "A")
stateMachine.registerTransition(from: "A", to: "B", event: "event1")
stateMachine.registerTransition(from: "B", to: "C", event: "event2")
stateMachine.registerTransition(from: "C", to: "D", event: "event3")
stateMachine.trigger(event: "event1")
print(stateMachine.state) // B
stateMachine.trigger(event: "event2")
print(stateMachine.state) // C
stateMachine.trigger(event: "event3")
print(stateMachine.state) // D
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else { return }
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else { return }
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var transitionsFromState = transitions[from] ?? [:]
transitionsFromState[event] = to
transitions[from] = transitionsFromState
}
}```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var transitionsFromState = transitions[from] ?? [:]
transitionsFromState[event] = to
transitions[from] = transitionsFromState
}
}
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}
```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}```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: [Event: State]] = [:]
private var currentState: State
required init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
guard let nextState = transitions[currentState]?[event] else {
return
}
currentState = nextState
}
func registerTransition(from: State, to: State, event: Event) {
var events = transitions[from] ?? [:]
events[event] = to
transitions[from] = events
}
}
```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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][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: [Event: State]] = [:]
private(set) var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
class FileSystem {
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)
}
func add(node: FileSystemNode, to parent: FileSystemNode) -> FileSystemNode {
switch parent {
case .file:
fatalError("Can't add node to file.")
case .directory(_, var contents):
contents.append(node)
return .directory(name: parent.name, contents: contents)
}
}
func remove(node: FileSystemNode, from parent: FileSystemNode) -> FileSystemNode {
switch parent {
case .file:
fatalError("Can't remove node from file.")
case .directory(_, var contents):
guard let index = contents.firstIndex(where: { $0.name == node.name }) else {
fatalError("Can't find node with name \(node.name) in directory.")
}
contents.remove(at: index)
return .directory(name: parent.name, contents: contents)
}
}
func move(node: FileSystemNode, from source: FileSystemNode, to destination: FileSystemNode) -> FileSystemNode {
let destination = remove(node: node, from: source)
return add(node: node, to: destination)
}
}
class FileSystemVisitor {
private let fileSystem: FileSystem
init(fileSystem: FileSystem) {
self.fileSystem = fileSystem
}
func visit(node: FileSystemNode) {
switch node {
case .file(let name, let size):
print("File: \(name), size: \(size)")
case .directory(let name, let contents):
print("Directory: \(name)")
for content in contents {
visit(node: content)
}
}
}
}
class FileSystemPrinter {
private let fileSystem: FileSystem
init(fileSystem: FileSystem) {
self.fileSystem = fileSystem
}
func print() {
let root = fileSystem.createDirectory(name: "root", contents: [])
let file1 = fileSystem.createFile(name: "file1", size: 100)
let file2 = fileSystem.createFile(name: "file2", size: 200)
let directory1 = fileSystem.createDirectory(name: "directory1", contents: [file1])
let directory2 = fileSystem.createDirectory(name: "directory2", contents: [file2])
let rootWithContents = fileSystem.add(node: directory1, to: root)
let rootWithContentsAndDirectory2 = fileSystem.add(node: directory2, to: rootWithContents)
let visitor = FileSystemVisitor(fileSystem: fileSystem)
visitor.visit(node: rootWithContentsAndDirectory2)
}
}```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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
// Concrete file system manager.
// Used to create file system nodes and perform operations on them.
class FileSystem {
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)
}
func add(node: FileSystemNode, to parent: FileSystemNode) -> FileSystemNode {
switch parent {
case .file:
fatalError("Can't add node to file.")
case .directory(_, var contents):
contents.append(node)
return .directory(name: parent.name, contents: contents)
}
}
func remove(node: FileSystemNode, from parent: FileSystemNode) -> FileSystemNode {
switch parent {
case .file:
fatalError("Can't remove node from file.")
case .directory(_, var contents):
guard let index = contents.firstIndex(where: { $0.name == node.name }) else {
fatalError("Can't find node with name \(node.name) in directory.")
}
contents.remove(at: index)
return .directory(name: parent.name, contents: contents)
}
}
func move(node: FileSystemNode, from source: FileSystemNode, to destination: FileSystemNode) -> FileSystemNode {
let destination = remove(node: node, from: source)
return add(node: node, to: destination)
}
}
// Concrete file system visitor.
// Used to traverse file system tree and perform operations on nodes.
class FileSystemVisitor {
private let fileSystem: FileSystem
init(fileSystem: FileSystem) {
self.fileSystem = fileSystem
}
func visit(node: FileSystemNode) {
switch node {
case .file(let name, let size):
print("File: \(name), size: \(size)")
case .directory(let name, let contents):
print("Directory: \(name)")
for content in contents {
visit(node: content)
}
}
}
}
// Concrete file system printer.
// Used to print file system tree.
class FileSystemPrinter {
private let fileSystem: FileSystem
init(fileSystem: FileSystem) {
self.fileSystem = fileSystem
}
func print() {
let root = fileSystem.createDirectory(name: "root", contents: [])
let file1 = fileSystem.createFile(name: "file1", size: 100)
let file2 = fileSystem.createFile(name: "file2", size: 200)
let directory1 = fileSystem.createDirectory(name: "directory1", contents: [file1])
let directory2 = fileSystem.createDirectory(name: "directory2", contents: [file2])
let rootWithContents = fileSystem.add(node: directory1, to: root)
let rootWithContentsAndDirectory2 = fileSystem.add(node: directory2, to: rootWithContents)
let visitor = FileSystemVisitor(fileSystem: fileSystem)
visitor.visit(node: rootWithContentsAndDirectory2)
}
}
let fileSystem = FileSystem()
let printer = FileSystemreturn .directory(name: parent.name, contents: contents) // value of type 'FileSystemNode' has no member 'name'guard let index = contents.firstIndex(where: { $0.name == node.name }) else { // value of type 'FileSystemNode' has no member 'name'guard let index = contents.firstIndex(where: { $0.name == node.name }) else { // value of type 'FileSystemNode' has no member 'name'fatalError("Can't find node with name \(node.name) in directory.") // value of type 'FileSystemNode' has no member 'name'return .directory(name: parent.name, contents: contents) // value of type 'FileSystemNode' has no member 'name'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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
protocol FileSystemNodeVisitor {
func visit(file: FileSystemNode.File)
func visit(directory: FileSystemNode.Directory)
}
struct FileSystemNodePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name)")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name)")
}
}
struct FileSystemNodeSizePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes")
}
}
struct FileSystemNodeFilesCountPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files")
}
}
struct FileSystemNodeTreeDepthPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}
struct FileSystemNodeTreeDepthAndFilesCountPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}
struct FileSystemNodeTreeDepthAndFilesCountAndSizePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}```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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
// File system node visitor.
// Used to traverse file system tree and perform some actions for each node.
protocol FileSystemNodeVisitor {
func visit(file: FileSystemNode.File)
func visit(directory: FileSystemNode.Directory)
}
// File system node visitor that prints all files and directories.
struct FileSystemNodePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name)")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name)")
}
}
// File system node visitor that prints all files and directories with their size.
struct FileSystemNodeSizePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes")
}
}
// File system node visitor that prints all files and directories with their size and files count.
struct FileSystemNodeFilesCountPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files")
}
}
// File system node visitor that prints all files and directories with their size, files count and tree depth.
struct FileSystemNodeTreeDepthPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}
// File system node visitor that prints all files and directories with their size, files count and tree depth.
struct FileSystemNodeTreeDepthAndFilesCountPrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}
// File system node visitor that prints all files and directories with their size, files count and tree depth.
struct FileSystemNodeTreeDepthAndFilesCountAndSizePrinter: FileSystemNodeVisitor {
func visit(file: FileSystemNode.File) {
print("File: \(file.name) - \(file.size) bytes")
}
func visit(directory: FileSystemNode.Directory) {
print("Directory: \(directory.name) - \(directory.totalSize) bytes, \(directory.filesCount) files, \(directory.treeDepth) levels")
}
}
// File system node visitor that prints all files and directories with their size, files count and tree depth.
struct FileSystemNodeTreeDepthAndFilesCountAndSizeAndNamePrinter: FileSystemNodeVisitor {
funcfunc visit(file: FileSystemNode.File) // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max() ?? 0
}
}
}
extension FileSystemNode {
func createFile(name: String, size: Int) {
switch self {
case .file:
fatalError("Can't create file in file.")
case .directory(_, var contents):
contents.append(.file(name: name, size: size))
self = .directory(name: name, contents: contents)
}
}
func createDirectory(name: String) {
switch self {
case .file:
fatalError("Can't create directory in file.")
case .directory(_, var contents):
contents.append(.directory(name: name, contents: []))
self = .directory(name: name, contents: contents)
}
}
func remove(name: String) {
switch self {
case .file:
fatalError("Can't remove file from file.")
case .directory(_, var contents):
contents.removeAll(where: { $0.name == name })
self = .directory(name: name, contents: contents)
}
}
func rename(name: String, to newName: String) {
switch self {
case .file:
fatalError("Can't rename file in file.")
case .directory(_, var contents):
contents.forEach {
if $0.name == name {
$0.name = newName
}
}
self = .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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max() ?? 0
}
}
}
// Concrete file system manager.
// Used to create, remove and rename files and directories.
extension FileSystemNode {
func createFile(name: String, size: Int) {
switch self {
case .file:
fatalError("Can't create file in file.")
case .directory(_, var contents):
contents.append(.file(name: name, size: size))
self = .directory(name: name, contents: contents)
}
}
func createDirectory(name: String) {
switch self {
case .file:
fatalError("Can't create directory in file.")
case .directory(_, var contents):
contents.append(.directory(name: name, contents: []))
self = .directory(name: name, contents: contents)
}
}
func remove(name: String) {
switch self {
case .file:
fatalError("Can't remove file from file.")
case .directory(_, var contents):
contents.removeAll(where: { $0.name == name })
self = .directory(name: name, contents: contents)
}
}
func rename(name: String, to newName: String) {
switch self {
case .file:
fatalError("Can't rename file in file.")
case .directory(_, var contents):
contents.forEach {
if $0.name == name {
$0.name = newName
}
}
self = .directory(name: name, contents: contents)
}
}
}
```self = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutableself = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutablecontents.removeAll(where: { $0.name == name }) // value of type 'FileSystemNode' has no member 'name'self = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutableif $0.name == name { // value of type 'FileSystemNode' has no member 'name'self = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutableindirect 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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return 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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max() ?? 0
}
}
}
``` // XCTAssertEqual failed: (0) is not equal to (1)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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
extension FileSystemNode {
func createFile(name: String, size: Int) -> FileSystemNode {
return .file(name: name, size: size)
}
func createDirectory(name: String) -> FileSystemNode {
return .directory(name: name, contents: [])
}
func remove(name: String) -> FileSystemNode {
switch self {
case .file(let currentName, _):
return currentName == name ? .file(name: "", size: 0) : self
case .directory(let currentName, let contents):
return currentName == name ? .directory(name: "", contents: []) : .directory(name: currentName, contents: contents.map { $0.remove(name: name) })
}
}
func move(from: String, to: String) -> FileSystemNode {
switch self {
case .file(let currentName, let size):
return currentName == from ? .file(name: to, size: size) : self
case .directory(let currentName, let contents):
return currentName == from ? .directory(name: to, contents: contents) : .directory(name: currentName, contents: contents.map { $0.move(from: from, to: to) })
}
}
}
extension FileSystemNode: CustomStringConvertible {
var description: String {
switch self {
case .file(let name, let size):
return "File: \(name) - \(size) bytes"
case .directory(let name, let contents):
return "Directory: \(name)\n" + contents.map { " " + $0.description }.joined(separator: "\n")
}
}
}
extension FileSystemNode {
static func buildTree(from paths: [String]) -> FileSystemNode {
let root = FileSystemNode.directory(name: "", contents: [])
return paths.reduce(root) { node, path in
let components = path.components(separatedBy: "/")
return node.createDirectory(name: components[0]).move(from: "", to: components[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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
// File system manager.
// Used to create, remove and move files and directories.
extension FileSystemNode {
func createFile(name: String, size: Int) -> FileSystemNode {
return .file(name: name, size: size)
}
func createDirectory(name: String) -> FileSystemNode {
return .directory(name: name, contents: [])
}
func remove(name: String) -> FileSystemNode {
switch self {
case .file(let currentName, _):
return currentName == name ? .file(name: "", size: 0) : self
case .directory(let currentName, let contents):
return currentName == name ? .directory(name: "", contents: []) : .directory(name: currentName, contents: contents.map { $0.remove(name: name) })
}
}
func move(from: String, to: String) -> FileSystemNode {
switch self {
case .file(let currentName, let size):
return currentName == from ? .file(name: to, size: size) : self
case .directory(let currentName, let contents):
return currentName == from ? .directory(name: to, contents: contents) : .directory(name: currentName, contents: contents.map { $0.move(from: from, to: to) })
}
}
}
// File system printer.
// Used to print file system tree.
extension FileSystemNode: CustomStringConvertible {
var description: String {
switch self {
case .file(let name, let size):
return "File: \(name) - \(size) bytes"
case .directory(let name, let contents):
return "Directory: \(name)\n" + contents.map { " " + $0.description }.joined(separator: "\n")
}
}
}
// File system tree builder.
// Used to build file system tree.
extension FileSystemNode {
static func buildTree(from paths: [String]) -> FileSystemNode {
let root = FileSystemNode.directory(name: "", contents: [])
return paths.reduce(root) { node, path in
let components = path.components(separatedBy: "/")
return node.createDirectory(name: components[0]).move(from: "", to: components[0])
}
}
}
``` // Fatal error: Unexpectedly found nil while unwrapping an Optional valueindirect 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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max() ?? 0
}
}
}
extension FileSystemNode {
func createFile(name: String, size: Int) {
switch self {
case .file:
fatalError("Can't create file in file")
case .directory(_, var contents):
contents.append(.file(name: name, size: size))
self = .directory(name: name, contents: contents)
}
}
func createDirectory(name: String) {
switch self {
case .file:
fatalError("Can't create directory in file")
case .directory(_, var contents):
contents.append(.directory(name: name, contents: []))
self = .directory(name: name, contents: contents)
}
}
func delete(name: String) {
switch self {
case .file:
fatalError("Can't delete file in file")
case .directory(_, var contents):
contents = contents.filter { $0.name != name }
self = .directory(name: name, contents: contents)
}
}
func move(from: String, to: String) {
switch self {
case .file:
fatalError("Can't move file in file")
case .directory(_, var contents):
contents = contents.map {
$0.move(from: from, to: to)
}
self = .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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.treeDepth }.max() ?? 0
}
}
}
// Concrete file system manager.
// Used to create, delete and move files and directories.
extension FileSystemNode {
func createFile(name: String, size: Int) {
switch self {
case .file:
fatalError("Can't create file in file")
case .directory(_, var contents):
contents.append(.file(name: name, size: size))
self = .directory(name: name, contents: contents)
}
}
func createDirectory(name: String) {
switch self {
case .file:
fatalError("Can't create directory in file")
case .directory(_, var contents):
contents.append(.directory(name: name, contents: []))
self = .directory(name: name, contents: contents)
}
}
func delete(name: String) {
switch self {
case .file:
fatalError("Can't delete file in file")
case .directory(_, var contents):
contents = contents.filter { $0.name != name }
self = .directory(name: name, contents: contents)
}
}
func move(from: String, to: String) {
switch self {
case .file:
fatalError("Can't move file in file")
case .directory(_, var contents):
contents = contents.map {
$0.move(from: from, to: to)
}
self = .directory(name: name, contents: contents)
}
}
}
```self = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutableself = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutablecontents = contents.filter { $0.name != name } // trailing closure passed to parameter of type 'Predicate<FileSystemNode>' that does not accept a closureself = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutable$0.move(from: from, to: to) // cannot convert value of type '()' to closure result type 'FileSystemNode'self = .directory(name: name, contents: contents) // cannot find 'name' in scopeself = .directory(name: name, contents: contents) // cannot assign to value: 'self' is immutableindirect 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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 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 .file(_, let size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
// Concrete file system manager.
// Used to create file system nodes and perform operations on them.
class FileSystem {
private var root: FileSystemNode
init(root: FileSystemNode) {
self.root = root
}
func createFile(name: String, size: Int) {
root = .file(name: name, size: size)
}
func createDirectory(name: String) {
root = .directory(name: name, contents: [])
}
func addFile(name: String, size: Int) {
switch root {
case .file:
fatalError("Can't add file to file")
case .directory(_, var contents):
contents.append(.file(name: name, size: size))
root = .directory(name: root.name, contents: contents)
}
}
func addDirectory(name: String) {
switch root {
case .file:
fatalError("Can't add directory to file")
case .directory(_, var contents):
contents.append(.directory(name: name, contents: []))
root = .directory(name: root.name, contents: contents)
}
}
func remove(at path: String) {
switch root {
case .file:
fatalError("Can't remove file from file")
case .directory(_, var contents):
let components = path.split(separator: "/")
guard let index = Int(components[0]) else {
fatalError("Invalid path")
}
if components.count == 1 {
contents.remove(at: index)
} else {
let subPath = String(components[1...].joined(separator: "/"))
contents[index].remove(at: subPath)
}
root = .directory(name: root.name, contents: contents)
}
}
func move(from sourcePath: String, to destinationPath: String) {
switch root {
case .file:
fatalError("Can't move file from file")
case .directory(_, var contents):
let sourceComponents = sourcePath.split(separator: "/")
guard let sourceIndex = Int(sourceComponents[0]) else {
fatalError("Invalid source path")
}
let sourceSubPath = String(sourceComponents[1...].joined(separator: "/"))
let destinationComponents = destinationPath.split(separator: "/")
guard let destinationIndex = Int(destinationComponents[0]) else {
fatalError("Invalid destination path")
}
let destinationSubPath = String(destinationComponents[1...].joined(separator: "/"))
if sourceComponents.count == 1 {
let node = contents.remove(at: sourceIndex)
if destinationComponents.count == 1 {
contents.insert(node, at: destinationIndex)
} else {
contents[destinationIndex].add(node, at: destinationSubPath)
}
} else {
contents[sourceIndex].remove(at: sourceSubPath)
if destinationComponents.count == 1 {
contents.insert(contents[sourceIndex], at: destinationIndex)
} else {
contents[destinationIndex].add(contents[sourceIndex], at: destinationSubPath)
}
}
root = .directory(name: root.name, contents: 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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 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 .file(_, let size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
```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 size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 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 .file(_, let size):
return size
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
```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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
protocol FileSystemNodeVisitor {
func visit(file: FileSystemNode.File)
func visit(directory: FileSystemNode.Directory)
}
struct FileSystemTreePrinter: FileSystemNodeVisitor {
private let indent: String
private let depth: Int
init(indent: String = " ", depth: Int = 0) {
self.indent = indent
self.depth = depth
}
func visit(file: FileSystemNode.File) {
print("\(indent)\(file.name)")
}
func visit(directory: FileSystemNode.Directory) {
print("\(indent)\(directory.name):")
let nextIndent = indent + " "
directory.contents.forEach { $0.accept(visitor: FileSystemTreePrinter(indent: nextIndent, depth: depth + 1)) }
}
}
struct FileSystemMetadataCalculator: FileSystemNodeVisitor {
private var totalSize = 0
private var filesCount = 0
private var treeDepth = 0
func visit(file: FileSystemNode.File) {
totalSize += file.size
filesCount += 1
treeDepth = max(treeDepth, 1)
}
func visit(directory: FileSystemNode.Directory) {
totalSize += directory.contents.map { $0.totalSize }.reduce(0, +)
filesCount += directory.contents.map { $0.filesCount }.reduce(0, +)
treeDepth = max(treeDepth, directory.contents.map { $0.treeDepth }.max()! + 1)
}
}
protocol FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor)
}
extension FileSystemNode: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
switch self {
case .file(let name, _):
visitor.visit(file: .init(name: name))
case .directory(let name, let contents):
visitor.visit(directory: .init(name: name, contents: contents))
}
}
}
extension FileSystemNode.File: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
visitor.visit(file: self)
}
}
extension FileSystemNode.Directory: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
visitor.visit(directory: self)
}
}
extension Array: FileSystemNodeVisitable where Element: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
forEach { $0.accept(visitor: visitor) }
}
}```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 size):
return size
case .directory(_, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case .directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
// File system node visitor.
// Used to traverse file system tree and perform some action on each node.
protocol FileSystemNodeVisitor {
func visit(file: FileSystemNode.File)
func visit(directory: FileSystemNode.Directory)
}
// File system node visitor that prints file system tree.
struct FileSystemTreePrinter: FileSystemNodeVisitor {
private let indent: String
private let depth: Int
init(indent: String = " ", depth: Int = 0) {
self.indent = indent
self.depth = depth
}
func visit(file: FileSystemNode.File) {
print("\(indent)\(file.name)")
}
func visit(directory: FileSystemNode.Directory) {
print("\(indent)\(directory.name):")
let nextIndent = indent + " "
directory.contents.forEach { $0.accept(visitor: FileSystemTreePrinter(indent: nextIndent, depth: depth + 1)) }
}
}
// File system node visitor that calculates file system metadata.
struct FileSystemMetadataCalculator: FileSystemNodeVisitor {
private var totalSize = 0
private var filesCount = 0
private var treeDepth = 0
func visit(file: FileSystemNode.File) {
totalSize += file.size
filesCount += 1
treeDepth = max(treeDepth, 1)
}
func visit(directory: FileSystemNode.Directory) {
totalSize += directory.contents.map { $0.totalSize }.reduce(0, +)
filesCount += directory.contents.map { $0.filesCount }.reduce(0, +)
treeDepth = max(treeDepth, directory.contents.map { $0.treeDepth }.max()! + 1)
}
}
// File system node visitor that performs some action on each node.
protocol FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor)
}
// File system node visitor that performs some action on each node.
extension FileSystemNode: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
switch self {
case .file(let name, _):
visitor.visit(file: .init(name: name))
case .directory(let name, let contents):
visitor.visit(directory: .init(name: name, contents: contents))
}
}
}
// File system node visitor that performs some action on each node.
extension FileSystemNode.File: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
visitor.visit(file: self)
}
}
// File system node visitor that performs some action on each node.
extension FileSystemNode.Directory: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
visitor.visit(directory: self)
}
}
// File system node visitor that performs some action on each node.
extension Array: FileSystemNodeVisitable where Element: FileSystemNodeVisitable {
func accept(visitor: FileSystemNodeVisitor) {
forEach { $0.accept(visitor: visitor) }
}
}
// File system node visitor that performs some action on each node.
extension FileSystemNode.File {
func accept(visitor: FileSystemNodeVisitor) {func visit(file: FileSystemNode.File) // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'func visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'func visit(file: FileSystemNode.File) { // 'File' is not a member type of enum 'Solution.FileSystemNode'filesCount += 1 // left side of mutating operator isn't mutable: 'self' is immutabletreeDepth = max(treeDepth, 1) // cannot assign to property: 'self' is immutablefunc visit(directory: FileSystemNode.Directory) { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'treeDepth = max(treeDepth, directory.contents.map { $0.treeDepth }.max()! + 1) // cannot assign to property: 'self' is immutablevisitor.visit(file: .init(name: name)) // cannot infer contextual base in reference to member 'init'visitor.visit(directory: .init(name: name, contents: contents)) // cannot infer contextual base in reference to member 'init'extension FileSystemNode.File: FileSystemNodeVisitable { // 'File' is not a member type of enum 'Solution.FileSystemNode'extension FileSystemNode.Directory: FileSystemNodeVisitable { // 'Directory' is not a member type of enum 'Solution.FileSystemNode'protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements = [Element]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
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]()
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Generclass Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Stack of strings.
let stringStack = Stack<String>()
stringStack.push("hello")
stringStack.push("world")
print(stringStack.pop()!)
// Stack of integers.
let intStack = Stack<Int>()
intStack.push(1)
intStack.push(2)
print(intStack.pop()!)
```class Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.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 items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Create a stack of strings.
let stringStack = Stack<String>()
// Create a stack of integers.
let intStack = Stack<Int>()
// Create a stack of floating-point numbers.
let doubleStack = Stack<Double>()
// Create a stack of any type.
let anyStack = Stack<Any>()
// Create a stack of arrays of integers.
let intArrayStack = Stack<[Int]>()
// Create a stack of dictionaries of strings to integers.
let stringIntDictionaryStack = Stack<[String: Int]>()
```class Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Create a stack of strings.
let stringStack = Stack<String>()
stringStack.push("hello")
stringStack.push("world")
stringStack.pop()
// Create a stack of integers.
let intStack = Stack<Int>()
intStack.push(1)
intStack.push(2)
intStack.pop()
```class Stack<Element>: StackProtocol { // 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<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<Element>: StackProtocol {
private var items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.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 items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
private var items: [Element] = []
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
```class Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
returnclass Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```class Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
returnclass Stack<Element>: StackProtocol { // 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<Element>: StackProtocol {
private var elements: [Element] = []
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] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
// Create a stack of strings.
let stringStack = Stack<String>()
stringStack.push("hello")
stringStack.push("world")
// Create a stack of integers.
let intStack = Stack<Int>()
intStack.push(1)
intStack.push(2)
// Create a stack of doubles.
let doubleStack = Stack<Double>()
doubleStack.push(3.14)
doubleStack.push(2.71)
// Create a stack of strings and integers.
let mixedStack = Stack<Any>()
mixedStack.push("hello")
mixedStack.push(1)
mixedStack.push(3.14)
// Create a stack of strings and integers.
let mixedStack2 = Stack<Any>()
mixedStack2.push(1)
mixedStack2.push("hello")
mixedStack2.push(3.14)
// Create a stack of strings and integers.
let mixedStack3 = Stack<Any>()
mixedStack3.push(1)
mixedStack3.push(3.14)
mixedStack3.push("hello")
```class Stack<Element>: StackProtocol { // 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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
return cache[key]
}
return nil
}
set {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
} else {
keys.insert(key, at: 0)
}
cache[key] = newValue
if keys.count > capacity {
let lastKey = keys.last!
keys.removeLast()
cache.removeValue(forKey: lastKey)
}
}
}
}```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 cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
return cache[key]
}
return nil
}
set {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
} else {
keys.insert(key, at: 0)
}
cache[key] = newValue
if keys.count > capacity {
let lastKey = keys.last!
keys.removeLast()
cache.removeValue(forKey: lastKey)
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
keys.removeFirst()
cache.removeValue(forKey: keys.first!)
}
} else {
cache.removeValue(forKey: key)
keys.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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
keys.removeFirst()
cache.removeValue(forKey: keys.first!)
}
} else {
cache.removeValue(forKey: key)
keys.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, Element>'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.insert(key, at: 0)
if keys.count > capacity {
let keyToRemove = keys.last!
keys.removeLast()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}```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 cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.insert(key, at: 0)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.insert(key, at: 0)
if keys.count > capacity {
let keyToRemove = keys.last!
keys.removeLast()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}```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 cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}
```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, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var order = [Key]()
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else { return nil }
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let value = newValue else { return }
cache[key] = value
order.append(key)
if order.count > capacity {
let key = order.removeFirst()
cache.removeValue(forKey: 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, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var order = [Key]()
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else { return nil }
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let value = newValue else { return }
cache[key] = value
order.append(key)
if order.count > capacity {
let key = order.removeFirst()
cache.removeValue(forKey: key)
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
cache.removeValue(forKey: keys.removeFirst())
}
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
cache.removeValue(forKey: keys.removeFirst())
}
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.firstIndex(of: key)!)
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element]
private var keys: [Key]
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.keys = []
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}```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 cache: [Key: Element]
private var keys: [Key]
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.keys = []
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let newValue = newValue {
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
cache.removeValue(forKey: keys.removeFirst())
}
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.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, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var keys: [Key] = []
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
cache.removeValue(forKey: keys.removeFirst())
}
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.firstIndex(of: key)!)
}
}
}
}
```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, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var keys = [Key]()
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let value = newValue {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
cache[key] = value
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.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, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var keys = [Key]()
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
return cache[key]
}
set {
if let value = newValue {
keys.remove(at: keys.firstIndex(of: key)!)
keys.append(key)
cache[key] = value
} else {
cache.removeValue(forKey: key)
keys.remove(at: keys.firstIndex(of: key)!)
}
}
}
}
```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, Element>: CacheProtocol {
private var cache: [Key: Element]
private var keys: [Key]
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.keys = []
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}```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 cache: [Key: Element]
private var keys: [Key]
private let capacity: Int
init(capacity: Int) {
self.capacity = capacity
self.cache = [:]
self.keys = []
}
subscript(key: Key) -> Element? {
get {
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
keys.append(key)
return cache[key]
}
return nil
}
set {
if let value = newValue {
cache[key] = value
keys.append(key)
if keys.count > capacity {
let keyToRemove = keys.removeFirst()
cache.removeValue(forKey: keyToRemove)
}
} else {
cache.removeValue(forKey: key)
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
}
}
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}
// Usage
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
cache["key"] // "value"
sleep(11)
cache["key"] // nil
```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
return expiration > Date() ? value : nil
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue!, key: key, expiration: 60) }
}
}```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
return expiration > Date() ? value : nil
}
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue!, key: key, expiration: 60) }
}
}
```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 10) }
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 10) }
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
return expiration > Date() ? value : nil
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 3600) }
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
return expiration > Date() ? value : nil
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 3600) }
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key],
Date() < expiration else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key],
Date() < expiration else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 10)
}
}
}
// Usage
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
print(cache["key"])
sleep(11)
print(cache["key"])
```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 3600)
}
}
}```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date() else {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 3600)
}
}
}
```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key],
expiration.timeIntervalSinceNow > 0 else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 3600)
}
}
}```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: Value, expiration: Date)] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key],
expiration.timeIntervalSinceNow > 0 else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
cache[key] = nil
return
}
put(value: value, key: key, expiration: 3600)
}
}
}
```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if Date() > expiration {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 10) }
}
}```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: Value, expiration: Date)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if Date() > expiration {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get { get(key: key) }
set { put(value: newValue!, key: key, expiration: 10) }
}
}
```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 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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}
```let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let encryptedChar = char ^ keyChar // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operandslet keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let decryptedChar = char ^ keyChar // cannot convert value of type 'Character' to expected argument type 'UInt8'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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}
// Usage
let encryptor = Encryptor()
let encryptedData = encryptor.encrypt("Hello, World!", "secret")
let decryptedString = encryptor.decrypt(encryptedData, "secret")
print(decryptedString) // Output: Hello, World!
```let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let encryptedChar = char ^ keyChar // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operandslet keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let decryptedChar = char ^ keyChar // cannot convert value of type 'Character' to expected argument type 'UInt8'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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyChar = key[index % key.count]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyChar = key[index % key.count]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(UnicodeScalar(decryptedChar)!))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyChar = key[index % key.count]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyChar = key[index % key.count]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(UnicodeScalar(decryptedChar)!))
}
return decryptedString
}
}
```let keyChar = key[index % key.count] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let encryptedChar = char ^ keyChar // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operandslet keyChar = key[index % key.count] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let decryptedChar = char ^ keyChar // cannot convert value of type 'Character' to expected argument type 'UInt8'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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $0 ^ key.data(using: .utf8)![0] }
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)!
}
}
// 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)!
return data.map { $return data.map { $0 ^ key.data(using: .utf8)![0] } // cannot convert return expression of type '[UInt8]' to return type 'Data'return String(data: data.map { $0 ^ key.data(using: .utf8)![0] }, encoding: .utf8)! // 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 {
var encryptedData = Data()
for i in 0..<string.count {
encryptedData.append(string[i].asciiValue! ^ key[i % key.count].asciiValue!)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(data[i] ^ key[i % key.count].asciiValue!)))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for i in 0..<string.count {
encryptedData.append(string[i].asciiValue! ^ key[i % key.count].asciiValue!)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(data[i] ^ key[i % key.count].asciiValue!)))
}
return decryptedString
}
}
```encryptedData.append(string[i].asciiValue! ^ key[i % key.count].asciiValue!) // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.encryptedData.append(string[i].asciiValue! ^ key[i % key.count].asciiValue!) // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.decryptedString.append(Character(UnicodeScalar(data[i] ^ key[i % key.count].asciiValue!))) // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.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)!
return data.enumerated().map { (index, byte) in
return byte ^ keyData[index % keyData.count]
}
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
return data.enumerated().map { (index, byte) in
return byte ^ keyData[index % keyData.count]
}.map { String(Character(UnicodeScalar($0))) }.joined()
}
}
class AES256Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using: .utf8)!
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return try! aes.encrypt(data.bytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)!
}
}
class AES256GCMEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using: .utf8)!
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7)
return try! aes.encrypt(data.bytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7)
return String(bytes: try! aes.decrypt(data.bytes), 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)!
return data.enumerated().map { (index, byte) in
return byte ^ keyData[index % keyData.count]
}
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
return data.enumerated().map { (index, byte) in
return byte ^ keyData[index % keyData.count]
}.map { String(Character(UnicodeScalar($0))) }.joined()
}
}
// Encryptor that uses AES-256-CBC encryption.
class AES256Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using: .utf8)!
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return try! aes.encrypt(data.bytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)!
}
}
// Encryptor that uses AES-256-GCM encryption.
class AES256GCMEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using: .utf8)!
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7)
return try! aes.encrypt(data.bytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7)
return String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)!
}
}
// Encryptor that uses AES-128-CBC encryption.
class AES128Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using: .utf8)!
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return try! aes.encrypt(data.bytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let ivData = keyData.subdata(in: 0..<16)
let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7)
return String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)!
}return data.enumerated().map { (index, byte) in // cannot convert return expression of type '[UInt8]' to return type 'Data'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot infer contextual base in reference to member 'pkcs7'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot find 'AES' in scopelet aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot find 'CBC' in scopelet aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'return try! aes.encrypt(data.bytes) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot infer contextual base in reference to member 'pkcs7'let aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot find 'CBC' in scopelet aes = AES(key: keyData.bytes, blockMode: CBC(iv: ivData.bytes), padding: .pkcs7) // cannot find 'AES' in scopereturn String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)! // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot find 'GCM' in scopelet aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot infer contextual base in reference to member 'pkcs7'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot find 'AES' in scopereturn try! aes.encrypt(data.bytes) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot find 'GCM' in scopelet aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot find 'AES' in scopelet aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // cannot infer contextual base in reference to member 'pkcs7'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'let aes = AES(key: keyData.bytes, blockMode: GCM(iv: ivData.bytes), padding: .pkcs7) // value of type 'Data' has no member 'bytes'return String(bytes: try! aes.decrypt(data.bytes), encoding: .utf8)! // value of type 'Data' has no member 'bytes'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 {
var encryptedData = Data()
for i in string.utf8 {
encryptedData.append(i ^ key.utf8[i % key.utf8.count])
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for i in data {
decryptedString.append(Character(UnicodeScalar(i ^ key.utf8[i % key.utf8.count])))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for i in string.utf8 {
encryptedData.append(i ^ key.utf8[i % key.utf8.count])
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for i in data {
decryptedString.append(Character(UnicodeScalar(i ^ key.utf8[i % key.utf8.count])))
}
return decryptedString
}
}
```encryptedData.append(i ^ key.utf8[i % key.utf8.count]) // binary operator '%' cannot be applied to operands of type 'String.UTF8View.Element' (aka 'UInt8') and 'Int'decryptedString.append(Character(UnicodeScalar(i ^ key.utf8[i % key.utf8.count]))) // binary operator '%' cannot be applied to operands of type 'UInt8' and 'Int'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 result = data.enumerated().map { (index, byte) -> UInt8 in
return byte ^ keyData[index % keyData.count]
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let result = data.enumerated().map { (index, byte) -> UInt8 in
return byte ^ keyData[index % keyData.count]
}
return String(data: Data(result), 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 result = data.enumerated().map { (index, byte) -> UInt8 in
return byte ^ keyData[index % keyData.count]
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using: .utf8)!
let result = data.enumerated().map { (index, byte) -> UInt8 in
return byte ^ keyData[index % keyData.count]
}
return String(data: Data(result), 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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}
```let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let encryptedChar = char ^ keyChar // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operandslet keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let decryptedChar = char ^ keyChar // cannot convert value of type 'Character' to expected argument type 'UInt8'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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}```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 {
var encryptedData = Data()
for (index, char) in string.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let encryptedChar = char ^ keyChar
encryptedData.append(encryptedChar)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for (index, char) in data.enumerated() {
let keyIndex = index % key.count
let keyChar = key[keyIndex]
let decryptedChar = char ^ keyChar
decryptedString.append(Character(decryptedChar))
}
return decryptedString
}
}
```let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let encryptedChar = char ^ keyChar // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operandslet keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.let decryptedChar = char ^ keyChar // cannot convert value of type 'Character' to expected argument type 'UInt8'protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let expiredRequests = requests.filter { $0 < now.addingTimeInterval(-timeInterval) }
requests.removeAll(where: { $0 < now.addingTimeInterval(-timeInterval) })
let allowed = requests.count < maxRequests
if allowed {
requests.append(now)
}
return allowed
}
}```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 requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let expiredRequests = requests.filter { $0 < now.addingTimeInterval(-timeInterval) }
requests.removeAll(where: { $0 < now.addingTimeInterval(-timeInterval) })
let allowed = requests.count < maxRequests
if allowed {
requests.append(now)
}
return allowed
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'let expiredRequests = requests.filter { $0 < now.addingTimeInterval(-timeInterval) } // initialization of immutable value 'expiredRequests' was never used; consider replacing with assignment to '_' or removing itThread.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 requestCount: Int = 0
private var lastRequestTime: Date = Date.distantPast
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 0
}
requestCount += 1
lastRequestTime = now
return requestCount <= 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 requestCount: Int = 0
private var lastRequestTime: Date = Date.distantPast
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 0
}
requestCount += 1
lastRequestTime = now
return requestCount <= maxRequests
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
requests.append(now)
requests = requests.filter { now.timeIntervalSince($0) <= timeInterval }
return requests.count <= 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 requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
requests.append(now)
requests = requests.filter { now.timeIntervalSince($0) <= timeInterval }
return requests.count <= maxRequests
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let count = requests.filter { $0 > now.addingTimeInterval(-timeInterval) }.count
if count < maxRequests {
requests.append(now)
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 requests: [Date] = []
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let count = requests.filter { $0 > now.addingTimeInterval(-timeInterval) }.count
if count < maxRequests {
requests.append(now)
return true
}
return false
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requestCount: Int
private var lastRequestTime: Date
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestCount = 0
self.lastRequestTime = Date()
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
let requestsSinceLastInterval = requestCount
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = now
return true
} else if requestsSinceLastInterval < maxRequests {
requestCount += 1
return true
} else {
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 requestCount: Int
private var lastRequestTime: Date
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestCount = 0
self.lastRequestTime = Date()
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
let requestsSinceLastInterval = requestCount
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = now
return true
} else if requestsSinceLastInterval < maxRequests {
requestCount += 1
return true
} else {
return false
}
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requestCount = 0
private var lastRequestTime: Date?
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 {
requestCount += 1
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 1
}
} else {
requestCount = 1
}
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 requestCount = 0
private var lastRequestTime: Date?
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 {
requestCount += 1
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 1
}
} else {
requestCount = 1
}
lastRequestTime = now
return true
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requestCount: Int = 0
private var lastRequestTime: Date = Date()
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
let requestsSinceLastInterval = requestCount
if timeSinceLastRequest > timeInterval {
requestCount = 0
}
if requestsSinceLastInterval < maxRequests {
requestCount += 1
lastRequestTime = now
return true
} else {
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 requestCount: Int = 0
private var lastRequestTime: Date = Date()
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let now = Date()
let timeSinceLastRequest = now.timeIntervalSince(lastRequestTime)
let requestsSinceLastInterval = requestCount
if timeSinceLastRequest > timeInterval {
requestCount = 0
}
if requestsSinceLastInterval < maxRequests {
requestCount += 1
lastRequestTime = now
return true
} else {
return false
}
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'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 requestCount: Int = 0
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 {
if now.timeIntervalSince(lastRequestTime) < timeInterval {
requestCount += 1
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
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 requestCount: Int = 0
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 {
if now.timeIntervalSince(lastRequestTime) < timeInterval {
requestCount += 1
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
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 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 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,
now.timeIntervalSince(lastRequestTime) < timeInterval {
requestsCount += 1
return requestsCount <= maxRequests
} else {
lastRequestTime = now
requestsCount = 1
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 var maxRequests: Int
private var 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,
now.timeIntervalSince(lastRequestTime) < timeInterval {
requestsCount += 1
return requestsCount <= maxRequests
} else {
lastRequestTime = now
requestsCount = 1
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 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 requestCount: Int
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestCount = 0
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
if now.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
}
}
lastRequestTime = now
requestCount += 1
return requestCount <= 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 var maxRequests: Int
private var timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestCount = 0
}
func allowRequest() -> Bool {
let now = Date()
if let lastRequestTime = lastRequestTime {
if now.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
}
}
lastRequestTime = now
requestCount += 1
return requestCount <= 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 ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
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()
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
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
lock.unlock()
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'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) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
required init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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()
init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
lock.unlock()
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = NSLock()
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()
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
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'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) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
required init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
required init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
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 counter: Int
private let lock = NSLock()
required init(value: Int) {
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) {
counter = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
counter += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return counter
}
}
```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: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform as! (T) -> T
}
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<T>: PipelineProtocol {
typealias Output = T
private var value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform as! (T) -> T
}
return result
}
}
```result = transform as! (T) -> T // cannot assign value of type '(T) -> T' to type 'T'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 transforms: [Any] = []
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 value = self.value
for transform in transforms {
value = transform as! (Output) -> Output
}
return 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 transforms: [Any] = []
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 value = self.value
for transform in transforms {
value = transform as! (Output) -> Output
}
return value
}
}
```value = transform as! (Output) -> Output // cannot assign value of type '(Pipeline<T>.Output) -> Pipeline<T>.Output' (aka '(T) -> T') to type 'T'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 let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: value)
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return transform as! (Output) -> Output
}(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 let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: value)
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return transform as! (Output) -> Output
}(value)
}
}
```return Pipeline<U>(value: value) // cannot convert value of type 'T' to expected argument type 'U'return transforms.reduce(value) { (value, transform) in // cannot convert value of type 'T' to expected argument type '(Pipeline<T>.Output) -> Pipeline<T>.Output' (aka '(T) -> T')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 let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return (transform as! (Output) -> Output)(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 let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return transforms.reduce(value) { (value, transform) in
return (transform as! (Output) -> Output)(value)
}
}
}
```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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = (transform as! (T) -> T)(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<T>: PipelineProtocol {
typealias Output = T
private let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = (transform as! (T) -> T)(result)
}
return result
}
}
```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 let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: value)
}
func execute() -> Output {
var result = value
for transform in transforms {
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<T>: PipelineProtocol {
typealias Output = T
private let value: Output
private var transforms: [Any] = []
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: value)
}
func execute() -> Output {
var result = value
for transform in transforms {
result = transform(result)
}
return result
}
}
// Usage
let pipeline = Pipeline(value: 1)
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.execute()
```return Pipeline<U>(value: value) // cannot convert value of type 'T' to expected argument type 'U'result = transform(result) // cannot call value of non-function type 'Any'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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(value)
}
}
}
// Usage
let pipeline = Pipeline(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.execute()
print(pipeline) // 4
```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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(value)
}
}
}
```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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(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 let value: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(value)
}
}
}
```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: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(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: T
private var transforms: [Any] = []
required init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
return transforms.reduce(value) { (value, transform) in
return (transform as! (T) -> T)(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 wrappedValue: 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) {
self.value = value
}
var wrappedValue: 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) }
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 wrappedValue: Value {
get { return value }
set {
self.value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
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 wrappedValue: Value {
get { return value }
set {
self.value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
for (_, observer) in observers {
observer(value)
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 wrappedValue: Value {
get { return value }
set {
value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
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 wrappedValue: Value {
get { return value }
set {
value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
observers.values.forEach { $0(value) }
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 {
typealias Value = Value
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
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[observer] = nil
}
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 {
typealias Value = Value
private var observers = [UUID: (Value) -> Void]()
private var _value: Value
var value: Value {
get {
return _value
}
set {
_value = newValue
notifyObservers()
}
}
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[observer] = nil
}
private func notifyObservers() {
for (_, observer) in observers {
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) {
self.value = value
}
var wrappedValue: Value {
get {
return value
}
set {
if newValue != value {
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() {
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) {
self.value = value
}
var wrappedValue: Value {
get {
return value
}
set {
if newValue != value {
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() {
for observer in observers.values {
observer(value)
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'if newValue != value { // binary operator '!=' cannot be applied to two 'Value' operandsprotocol 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 wrappedValue: Value {
get { value }
set {
value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
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 wrappedValue: Value {
get { value }
set {
value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
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) {
self.value = value
}
var wrappedValue: Value {
get { value }
set {
value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
observers.values.forEach { $0(value) }
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 wrappedValue: Value {
get { return value }
set {
self.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.forEach { $0.value(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 wrappedValue: Value {
get { return value }
set {
self.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.forEach { $0.value(value) }
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 wrappedValue: Value {
get { return value }
set {
self.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() {
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 wrappedValue: Value {
get { return value }
set {
self.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() {
for (_, observer) in observers {
observer(value)
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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 {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
var wrappedValue: Value {
get { 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 {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
var wrappedValue: Value {
get { 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) }
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'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> {
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
var wrappedValue: Value {
get { 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.forEach { _, observer in
observer(value)
}
}
}
extension ObservableProperty: ObservablePropertyProtocol {
typealias Value = 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> {
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
var wrappedValue: Value {
get { 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.forEach { _, observer in
observer(value)
}
}
}
// Extension to make ObservableProperty conform to ObservablePropertyProtocol.
extension ObservableProperty: ObservablePropertyProtocol {
typealias Value = Value
}
```extension ObservableProperty: ObservablePropertyProtocol { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'extension ObservableProperty: ObservablePropertyProtocol { // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}
struct S {
@Clamped(0...10) var i: 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<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}
struct S {
@Clamped(0...10) var i: Int
}
```struct Clamped<T: Comparable> { // property wrapper type 'Clamped' does not contain a non-static property named 'wrappedValue'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}
```struct Clamped<T: Comparable> { // property wrapper type 'Clamped' does not contain a non-static property named 'wrappedValue'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {
typealias Value = T
}
```struct Clamped<T: Comparable> { // property wrapper type 'Clamped' does not contain a non-static property named 'wrappedValue'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 = wrappedValue
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(range.lowerBound, newValue), 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 = wrappedValue
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = min(max(range.lowerBound, newValue), range.upperBound) }
}
}
extension Clamped: ClampedProtocol {}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
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(range.lowerBound, newValue), 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> {
var value: Value
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(range.lowerBound, newValue), range.upperBound) }
}
}
extension Clamped: ClampedProtocol {}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = 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<T: Comparable> {
var value: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.value = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {}
```struct Clamped<T: Comparable> { // property wrapper type 'Clamped' does not contain a non-static property named 'wrappedValue'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
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(range.lowerBound, newValue), 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> {
var value: Value
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(range.lowerBound, newValue), range.upperBound) }
}
}
extension Clamped: ClampedProtocol {}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<T: Comparable> {
var wrappedValue: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.wrappedValue = 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<T: Comparable> {
var wrappedValue: T
let range: ClosedRange<T>
init(wrappedValue: T, _ range: ClosedRange<T>) {
self.wrappedValue = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {}
``` // XCTAssertEqual failed: (15) is not equal to (10)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 = 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 = wrappedValue
self.range = range
}
}
extension Clamped: ClampedProtocol {}
``` // XCTAssertEqual failed: (15) is not equal to (10)protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
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(range.lowerBound, newValue), 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> {
var value: Value
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(range.lowerBound, newValue), range.upperBound) }
}
}
extension Clamped: ClampedProtocol {}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedInt: LoggedProtocol {
@Logged(logger: log)
var value: Int
init(value: Int) {
self.value = value
}
private func log(_ event: Event, _ value: Int) {
print("\(event) \(value)")
}
}
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
private func log(_ event: Event, _ value: String) {
print("\(event) \(value)")
}
}
struct LoggedUser {
@LoggedInt
var age: Int
@LoggedString
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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedInt: LoggedProtocol {
@Logged(logger: log)
var value: Int
init(value: Int) {
self.value = value
}
private func log(_ event: Event, _ value: Int) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
private func log(_ event: Event, _ value: String) {
print("\(event) \(value)")
}
}
// A type that uses the LoggedInt and LoggedString types.
struct LoggedUser {
@LoggedInt
var age: Int
@LoggedString
var name: String
}
var user = LoggedUser(age: 25, name: "John")
user.age = 30
user.name = "Jane"
```struct LoggedInt: LoggedProtocol { // type 'LoggedInt' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in callstruct LoggedString: LoggedProtocol { // type 'LoggedString' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@LoggedInt // struct 'LoggedInt' cannot be used as an attribute@LoggedString // struct 'LoggedString' cannot be used as an attributeenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
}
func log(_ event: Event, _ value: String) {
print("\(event) '\(value)'")
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that conforms to LoggedProtocol.
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
}
func log(_ event: Event, _ value: String) {
print("\(event) '\(value)'")
}
var loggedString = LoggedString(value: "initial")
loggedString.value = "updated"
```struct LoggedString: LoggedProtocol { // type 'LoggedString' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that logs access and modification of its properties.
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}
let properties = LoggedProperties(name: "Taylor", age: 28)
properties.name
properties.age = 30
```@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is availableenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
extension Logged: LoggedProtocol {}
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
extension Logged: LoggedProtocol {}
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}
let properties = LoggedProperties(name: "Taylor", age: 28)
properties.name
properties.age = 30
```@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is availableenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedProperties: LoggedProtocol {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that logs access and modification of its properties.
struct LoggedProperties: LoggedProtocol {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}
let properties = LoggedProperties(name: "Taylor", age: 28)
properties.name
properties.age = 30
```struct LoggedProperties: LoggedProtocol { // type 'LoggedProperties' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is availableenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedProperties: LoggedProtocol {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
init(name: String, age: Int) {
self.name = name
self.age = age
}
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that logs access and modification of its properties.
struct LoggedProperties: LoggedProtocol {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
init(name: String, age: Int) {
self.name = name
self.age = age
}
private func log(_ event: Event, _ value: Any) {
print("\(event) \(value)")
}
}
let properties = LoggedProperties(name: "John", age: 42)
properties.name = "Jane"
properties.age = 50
```struct LoggedProperties: LoggedProtocol { // type 'LoggedProperties' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is availableenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedExample {
@Logged(logger: { print("Property '\($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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedExample {
@Logged(logger: { print("Property '\($0)': \($1)") })
var name: String
}
let example = LoggedExample(name: "John Appleseed")
print(example.name)
// Prints "Property 'get': John Appleseed"
// Prints "Property 'set': John Appleseed"
```@Logged(logger: { print("Property '\($0)': \($1)") }) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedInt: LoggedProtocol {
@Logged(logger: log)
var value: Int
init(value: Int) {
self.value = value
}
private func log(_ event: Event, _ value: Int) {
print("\(event) \(value)")
}
}
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
private func log(_ event: Event, _ value: String) {
print("\(event) \(value)")
}
}
struct LoggedPoint: LoggedProtocol {
@Logged(logger: log)
var value: Point
init(value: Point) {
self.value = value
}
private func log(_ event: Event, _ value: Point) {
print("\(event) \(value)")
}
}
struct LoggedRectangle: LoggedProtocol {
@Logged(logger: log)
var value: Rectangle
init(value: Rectangle) {
self.value = value
}
private func log(_ event: Event, _ value: Rectangle) {
print("\(event) \(value)")
}
}
struct LoggedShape: LoggedProtocol {
@Logged(logger: log)
var value: Shape
init(value: Shape) {
self.value = value
}
private func log(_ event: Event, _ value: Shape) {
print("\(event) \(value)")
}
}
struct LoggedAnyShape: LoggedProtocol {
@Logged(logger: log)
var value: AnyShape
init(value: AnyShape) {
self.value = value
}
private func log(_ event: Event, _ value: AnyShape) {
print("\(event) \(value)")
}
}
struct LoggedAnyShapeArray: LoggedProtocol {
@Logged(logger: log)
var value: [AnyShape]
init(value: [AnyShape]) {
self.value = value
}
private func log(_ event: Event, _ value: [AnyShape]) {
print("\(event) \(value)")
}
}
struct LoggedAnyShapeDictionary: LoggedProtocol {
@Logged(logger: log)
var value: [String: AnyShape]
init(value: [String: AnyShape]) {
self.value = value
}
private func log(_ event: Event, _ value: [String: AnyShape]) {
print("\(event) \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedInt: LoggedProtocol {
@Logged(logger: log)
var value: Int
init(value: Int) {
self.value = value
}
private func log(_ event: Event, _ value: Int) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedString: LoggedProtocol {
@Logged(logger: log)
var value: String
init(value: String) {
self.value = value
}
private func log(_ event: Event, _ value: String) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedPoint: LoggedProtocol {
@Logged(logger: log)
var value: Point
init(value: Point) {
self.value = value
}
private func log(_ event: Event, _ value: Point) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedRectangle: LoggedProtocol {
@Logged(logger: log)
var value: Rectangle
init(value: Rectangle) {
self.value = value
}
private func log(_ event: Event, _ value: Rectangle) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedShape: LoggedProtocol {
@Logged(logger: log)
var value: Shape
init(value: Shape) {
self.value = value
}
private func log(_ event: Event, _ value: Shape) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedAnyShape: LoggedProtocol {
@Logged(logger: log)
var value: AnyShape
init(value: AnyShape) {
self.value = value
}
private func log(_ event: Event, _ value: AnyShape) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedAnyShapeArray: LoggedProtocol {
@Logged(logger: log)
var value: [AnyShape]
init(value: [AnyShape]) {
self.value = value
}
private func log(_ event: Event, _ value: [AnyShape]) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedAnyShapeDictionary: LoggedProtocol {
@Logged(logger: log)
var value: [String: AnyShape]
init(value: [String: AnyShape]) {
self.value = value
}
private func log(_ event: Event, _ value: [String: AnyShape]) {
print("\(event) \(value)")
}
}
// A type that conforms to LoggedProtocol and uses the Logged property wrapper.
struct LoggedAnyShapeOptional: LoggedProtocol {
@Logged(logger: log)
var value: AnyShape?
init(value: AnyShape?) {
self.value = value
}
private func log(_ event: Event,struct LoggedInt: LoggedProtocol { // type 'LoggedInt' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is availablestruct LoggedString: LoggedProtocol { // type 'LoggedString' does not conform to protocol 'LoggedProtocol'@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in callstruct LoggedPoint: LoggedProtocol { // type 'LoggedPoint' does not conform to protocol 'LoggedProtocol'var value: Point // cannot find type 'Point' in scopeinit(value: Point) { // cannot find type 'Point' in scopeprivate func log(_ event: Event, _ value: Point) { // cannot find type 'Point' in scopestruct LoggedRectangle: LoggedProtocol { // type 'LoggedRectangle' does not conform to protocol 'LoggedProtocol'var value: Rectangle // cannot find type 'Rectangle' in scopeinit(value: Rectangle) { // cannot find type 'Rectangle' in scopeprivate func log(_ event: Event, _ value: Rectangle) { // cannot find type 'Rectangle' in scopestruct LoggedShape: LoggedProtocol { // type 'LoggedShape' does not conform to protocol 'LoggedProtocol'var value: Shape // cannot find type 'Shape' in scopeinit(value: Shape) { // cannot find type 'Shape' in scopeprivate func log(_ event: Event, _ value: Shape) { // cannot find type 'Shape' in scopestruct LoggedAnyShape: LoggedProtocol { // type 'LoggedAnyShape' does not conform to protocol 'LoggedProtocol'var value: AnyShape // cannot find type 'AnyShape' in scopeinit(value: AnyShape) { // cannot find type 'AnyShape' in scopeprivate func log(_ event: Event, _ value: AnyShape) { // cannot find type 'AnyShape' in scopestruct LoggedAnyShapeArray: LoggedProtocol { // type 'LoggedAnyShapeArray' does not conform to protocol 'LoggedProtocol'var value: [AnyShape] // cannot find type 'AnyShape' in scopeinit(value: [AnyShape]) { // cannot find type 'AnyShape' in scopeprivate func log(_ event: Event, _ value: [AnyShape]) { // cannot find type 'AnyShape' in scopestruct LoggedAnyShapeDictionary: LoggedProtocol { // type 'LoggedAnyShapeDictionary' does not conform to protocol 'LoggedProtocol'var value: [String: AnyShape] // cannot find type 'AnyShape' in scopeinit(value: [String: AnyShape]) { // cannot find type 'AnyShape' in scopeprivate func log(_ event: Event, _ value: [String: AnyShape]) { // cannot find type 'AnyShape' in scopeenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
extension Logged: LoggedProtocol {
typealias Value = T
}
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
init(name: String, age: Int) {
self.name = name
self.age = age
}
private func log(_ event: Event, _ value: String) {
print("\(event) name to \(value)")
}
private func log(_ event: Event, _ value: Int) {
print("\(event) age to \(value)")
}
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
extension Logged: LoggedProtocol {
typealias Value = T
}
struct LoggedProperties {
@Logged(logger: log)
var name: String
@Logged(logger: log)
var age: Int
init(name: String, age: Int) {
self.name = name
self.age = age
}
private func log(_ event: Event, _ value: String) {
print("\(event) name to \(value)")
}
private func log(_ event: Event, _ value: Int) {
print("\(event) age to \(value)")
}
}
var person = LoggedProperties(name: "John", age: 21)
person.name = "Jane"
person.age = 22
```@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in call@Logged(logger: log) // cannot use instance member 'log' within property initializer; property initializers run before 'self' is available@Logged(logger: log) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedExample {
@Logged(logger: { print("Property '\($0)': \($1)") })
var name: String = "John Appleseed"
}```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<T> {
private var value: T
private let logger: (Event, T) -> Void
init(wrappedValue: T, logger: @escaping (Event, T) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: T {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct LoggedExample {
@Logged(logger: { print("Property '\($0)': \($1)") })
var name: String = "John Appleseed"
}
let example = LoggedExample()
print(example.name)
// Property 'get': John Appleseed
// John Appleseed
example.name = "Johnny Appleseed"
// Property 'set': Johnny Appleseed
```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
private var searchBarText: String = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
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
private var searchBarText: String = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
return nil
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
return nil
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.failure(city: "Wsaw")))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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: searchBarText)
return .success(city: searchBarText, forecast: forecast)
} catch {
return .failure(city: searchBarText)
}
}
}
}
```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
}
}```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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
return nil
case .keyboardDeleteBackwards:
searchBarText.removeLast()
return nil
case .searchButtonPress:
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.failure(city: "Wsaw")))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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
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
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
return nil
}
}
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchBarText: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
searchBarText.append(character)
case .keyboardDeleteBackwards:
searchBarText.removeLast()
case .searchButtonPress:
guard !searchBarText.isEmpty else { return nil }
return try? ApplicationFeedback.success(city: searchBarText, forecast: provider.forecast(for: searchBarText))
}
return nil
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.failure(city: "Wsaw")))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
}
func deposit(amount: Double) async {
await self.balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > self.balance {
return false
}
await self.balance -= amount
return true
}
var balance: Double {
get async {
return await self.balance
}
}
}```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
}
func deposit(amount: Double) async {
await self.balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > self.balance {
return false
}
await self.balance -= amount
return true
}
var balance: Double {
get async {
return await self.balance
}
}
}
```private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'await self.balance += amount // no 'async' operations occur within 'await' expressionawait self.balance -= amount // no 'async' operations occur within 'await' expressionvar balance: Double { // invalid redeclaration of 'balance'return await self.balance // no 'async' operations occur within 'await' expressionprotocol 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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard amount <= balance else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
// Usage
let account = BankAccount(balance: 100)
// Deposit 100
await account.deposit(amount: 100)
// Withdraw 50
let success = await account.withdraw(amount: 50)
// Check balance
let balance = await account.balance
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
guard balance >= amount else { return false }
balance -= amount
return true
}
var balance: Double {
get async { balance }
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
var balance: Double {
get async {
return balance
}
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
var balance: Double {
get async {
return balance
}
}
}
// 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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
var balance: Double {
get async {
return balance
}
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}
```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}
struct BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}```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
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}
// Thread-safe bank account class using a struct that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
struct BankAccount: BankAccountProtocol {
private var balance: Double
init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount > balance {
return false
}
balance -= amount
return true
}
var balance: Double {
get async {
balance
}
}
}
```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'struct BankAccount: BankAccountProtocol { // invalid redeclaration of 'BankAccount'private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'balance += amount // left side of mutating operator isn't mutable: 'self' is immutablebalance -= amount // left side of mutating operator isn't mutable: 'self' is immutablevar balance: Double { // invalid redeclaration of 'balance'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private let condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
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 let condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
value = wrappedValue()
}
return value!
}
}
}
```value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
value = wrappedValue()
}
return value!
}
}
```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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
value = wrappedValue()
}
return value!
}
}
```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 condition: () -> Bool
private var cachedValue: Value?
private var wrappedValue: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let cachedValue = cachedValue, condition() {
return cachedValue
} else {
let newValue = wrappedValue()
cachedValue = newValue
return newValue
}
}
}
struct Counter {
@Cached(condition: { $0.count > 10 })
var count: Int {
didSet {
print("Count set to \(count)")
}
}
}```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 condition: () -> Bool
private var cachedValue: Value?
private var wrappedValue: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let cachedValue = cachedValue, condition() {
return cachedValue
} else {
let newValue = wrappedValue()
cachedValue = newValue
return newValue
}
}
}
// Example usage
struct Counter {
@Cached(condition: { $0.count > 10 })
var count: Int {
didSet {
print("Count set to \(count)")
}
}
}
let counter = Counter()
counter.count = 1
counter.count = 11
counter.count = 12
counter.count = 13
counter.count = 14
counter.count = 15
counter.count = 16
counter.count = 17
counter.count = 18
counter.count = 19
counter.count = 20
counter.count = 21
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'cachedValue = newValue // 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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
value = wrappedValue()
}
return value!
}
}
```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 let condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
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 let condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
if condition() {
value = wrappedValue()
}
return value!
}
}
```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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
value = wrappedValue()
}
return value!
}
}
}
```value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var cachedValue: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.cachedValue = wrappedValue()
}
var wrappedValue: Value {
if condition() {
cachedValue = wrappedValue
}
return cachedValue!
}
}```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 condition: () -> Bool
private var cachedValue: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.cachedValue = wrappedValue()
}
var wrappedValue: Value {
if condition() {
cachedValue = wrappedValue
}
return cachedValue!
}
}
```cachedValue = 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 let condition: () -> Bool
private let compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.compute = wrappedValue
}
var wrappedValue: Value {
mutating get {
if condition() {
value = compute()
}
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 let condition: () -> Bool
private let compute: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.compute = wrappedValue
}
var wrappedValue: Value {
mutating get {
if condition() {
value = compute()
}
return value!
}
}
}
``` // Fatal error: Unexpectedly found nil while unwrapping an Optional valueprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
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 condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
var wrappedValue: Value {
mutating get {
if condition() {
value = wrappedValue
}
return value!
}
}
}
```value = wrappedValue // attempting to access 'wrappedValue' within its own getterinfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: MultiplicationPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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: MultiplicationPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { g(f($0)) }
}```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 { g(f($0)) }
}
// Usage
let addOne = { (x: Int) -> Int in x + 1 }
let multiplyByTwo = { (x: Int) -> Int in x * 2 }
let addOneAndMultiplyByTwo = addOne >>> multiplyByTwo
addOneAndMultiplyByTwo(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 { g(f($0)) }
}```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 { g(f($0)) }
}
// Usage
let addOne = { (x: Int) -> Int in
return x + 1
}
let multiplyByTwo = { (x: Int) -> Int in
return x * 2
}
let addOneAndMultiplyByTwo = addOne >>> multiplyByTwo
addOneAndMultiplyByTwo(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 { g(f($0)) }
}```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 { g(f($0)) }
}
// Usage
let addOne = { (x: Int) in x + 1 }
let multiplyByTwo = { (x: Int) in x * 2 }
let addOneAndMultiplyByTwo = addOne >>> multiplyByTwo
addOneAndMultiplyByTwo(3) // 8
```import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digest = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digest.update(buffer: buffer, byteCount: bytesRead)
}
return digest.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 digest = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digest.update(buffer: buffer, byteCount: bytesRead)
}
return digest.finalize()
}
```digest.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digest' is a 'let' constantdigest.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigest.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.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 digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.finalize()
}
```digester.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigester.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digester' is a 'let' constantdigester.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.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 digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.finalize()
}
```digester.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigester.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digester' is a 'let' constantdigester.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.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 digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.finalize()
}
```digester.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigester.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digester' is a 'let' constantdigester.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digest = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digest.update(buffer: buffer, byteCount: bytesRead)
}
return digest.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 digest = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digest.update(buffer: buffer, byteCount: bytesRead)
}
return digest.finalize()
}
```digest.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digest' is a 'let' constantdigest.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigest.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
// Create a SHA-256 hasher.
let hasher = SHA256()
// Create a buffer with the specified size.
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
// Read data from the input stream and update the hasher with the data.
while inputStream.hasBytesAvailable {
let numberOfBytesRead = inputStream.read(buffer, maxLength: bufferSize)
if numberOfBytesRead < 0 {
// An error occurred while reading from the input stream.
return nil
} else if numberOfBytesRead == 0 {
// The end of the input stream has been reached.
break
}
hasher.update(buffer, byteCount: numberOfBytesRead)
}
// Compute the SHA-256 hash of the data.
let hash = hasher.finalize()
// Deallocate the buffer.
buffer.deallocate()
// Return the SHA-256 hash.
return hash
}```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 with the specified size.
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
// Read data from the input stream and update the hasher with the data.
while inputStream.hasBytesAvailable {
let numberOfBytesRead = inputStream.read(buffer, maxLength: bufferSize)
if numberOfBytesRead < 0 {
// An error occurred while reading from the input stream.
return nil
} else if numberOfBytesRead == 0 {
// The end of the input stream has been reached.
break
}
hasher.update(buffer, byteCount: numberOfBytesRead)
}
// Compute the SHA-256 hash of the data.
let hash = hasher.finalize()
// Deallocate the buffer.
buffer.deallocate()
// Return the SHA-256 hash.
return hash
}
```hasher.update(buffer, byteCount: numberOfBytesRead) // cannot convert value of type 'UnsafeMutablePointer<UInt8>' to expected argument type 'UnsafeRawBufferPointer'hasher.update(buffer, byteCount: numberOfBytesRead) // cannot use mutating member on immutable value: 'hasher' is a 'let' constanthasher.update(buffer, byteCount: numberOfBytesRead) // extra argument 'byteCount' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
let digester = SHA256()
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
guard read > 0 else { return nil }
digester.update(buffer, byteCount: read)
}
return digester.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 buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
let digester = SHA256()
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
guard read > 0 else { return nil }
digester.update(buffer, byteCount: read)
}
return digester.finalize()
}
```digester.update(buffer, byteCount: read) // cannot use mutating member on immutable value: 'digester' is a 'let' constantdigester.update(buffer, byteCount: read) // extra argument 'byteCount' in calldigester.update(buffer, byteCount: read) // cannot convert value of type 'UnsafeMutablePointer<UInt8>' to expected argument type 'UnsafeRawBufferPointer'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.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 digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(&buffer, maxLength: bufferSize)
if bytesRead < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: bytesRead)
}
return digester.finalize()
}
```digester.update(buffer: buffer, byteCount: bytesRead) // extra arguments at positions #1, #2 in calldigester.update(buffer: buffer, byteCount: bytesRead) // cannot use mutating member on immutable value: 'digester' is a 'let' constantdigester.update(buffer: buffer, byteCount: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let read = inputStream.read(&buffer, maxLength: bufferSize)
if read < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: read)
}
return digester.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 digester = SHA256()
var buffer = [UInt8](repeating: 0, count: bufferSize)
while inputStream.hasBytesAvailable {
let read = inputStream.read(&buffer, maxLength: bufferSize)
if read < 0 {
return nil
}
digester.update(buffer: buffer, byteCount: read)
}
return digester.finalize()
}
```digester.update(buffer: buffer, byteCount: read) // missing argument for parameter 'bufferPointer' in calldigester.update(buffer: buffer, byteCount: read) // extra arguments at positions #1, #2 in calldigester.update(buffer: buffer, byteCount: read) // cannot use mutating member on immutable value: 'digester' is a 'let' constantimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
var context = SHA256()
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
if read < 0 {
return nil
}
context.update(buffer, byteCount: read)
}
return context.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 buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer { buffer.deallocate() }
var context = SHA256()
while inputStream.hasBytesAvailable {
let read = inputStream.read(buffer, maxLength: bufferSize)
if read < 0 {
return nil
}
context.update(buffer, byteCount: read)
}
return context.finalize()
}
```context.update(buffer, byteCount: read) // cannot convert value of type 'UnsafeMutablePointer<UInt8>' to expected argument type 'UnsafeRawBufferPointer'context.update(buffer, byteCount: read) // extra argument 'byteCount' in calltypealias 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: tuple16.0, 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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-terminatedself.init(cString: 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) // missing argument for parameter 'format' in callself.init(cString: 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) // extraneous argument label 'cString:' in calltypealias 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: tuple16.0, 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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-terminatedself.init(cString: 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) // missing argument for parameter 'format' in callself.init(cString: 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) // extraneous argument label 'cString:' in calltypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
let array = Array(tuple16)
let nullIndex = array.firstIndex(of: 0) ?? array.count
self = String(bytes: array[0..<nullIndex], encoding: .utf8) ?? ""
}
}
extension Tuple16 {
init(string: String) {
let array = Array(string.utf8)
self = (array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[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) {
let array = Array(tuple16)
let nullIndex = array.firstIndex(of: 0) ?? array.count
self = String(bytes: array[0..<nullIndex], encoding: .utf8) ?? ""
}
}
// Extension to the Tuple16 type that allows initializing a Tuple16 from a String.
extension Tuple16 {
init(string: String) {
let array = Array(string.utf8)
self = (array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[15])
}
}
```let array = Array(tuple16) // no exact matches in call to initializerextension Tuple16 { // tuple extension must be written as extension of '(repeat each Element)'extension Tuple16 { // tuple extension must declare conformance to exactly one protocolextension Tuple16 { // tuple extensions are experimentalself = (array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[15]) // pack expansion requires that 'String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element' (aka 'UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8') and 'each Element' have the same shapeself = (array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[15]) // cannot assign value of type '(String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element, String.UTF8View.Element)' (aka '(UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)') to type '(repeat each Element)'typealias 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 tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = 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 tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = string
}
}
```string.append(Character(UnicodeScalar(tuple16.0))) // no exact matches in call to initializertuple16 = (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, tuple16.16) // cannot assign to value: 'tuple16' is a 'let' constanttuple16 = (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, tuple16.16) // value of tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') has no member '16'typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
index += 1
tuple16 = (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, tuple16.16)
}
}
}```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()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
index += 1
tuple16 = (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, tuple16.16)
}
}
}
// 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()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
index += 1
tuple16 = (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, tuple16.16)
}
}
}
// 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()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
index += 1
tuple16 = (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, tuple16.16)
}
}
}
// 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()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
index += 1
tuple16 = (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, tuple16.16)
}
}
}
// 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()
var index = 0
while index < 16 {
if tuple16.0 == 0 {
break
}
self.append(Character(UnicodeScalar(tuple16.0)))
self.append(Character(UnicodeScalar(tuple16.0))) // no exact matches in call to initializertuple16 = (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, tuple16.16) // cannot assign to value: 'tuple16' is a 'let' constanttuple16 = (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, tuple16.16) // value of tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') has no member '16'typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
let string = String(tuple16.0) + String(tuple16.1) + String(tuple16.2) + String(tuple16.3) + String(tuple16.4) + String(tuple16.5) + String(tuple16.6) + String(tuple16.7) + String(tuple16.8) + String(tuple16.9) + String(tuple16.10) + String(tuple16.11) + String(tuple16.12) + String(tuple16.13) + String(tuple16.14) + String(tuple16.15)
self.init(string)
}
}
extension Tuple16 {
init(string: String) {
self.init(string.utf8.map { Int8($0) })
}
}
extension Array where Element == Int8 {
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 Tuple16 {
init(array: [Int8]) {
self.init(array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[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) {
let string = String(tuple16.0) + String(tuple16.1) + String(tuple16.2) + String(tuple16.3) + String(tuple16.4) + String(tuple16.5) + String(tuple16.6) + String(tuple16.7) + String(tuple16.8) + String(tuple16.9) + String(tuple16.10) + String(tuple16.11) + String(tuple16.12) + String(tuple16.13) + String(tuple16.14) + String(tuple16.15)
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 Tuple16 {
init(string: String) {
self.init(string.utf8.map { Int8($0) })
}
}
// 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 Array where Element == Int8 {
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 Tuple16 {
init(array: [Int8]) {
self.init(array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[15])
}
}
```extension Tuple16 { // tuple extension must be written as extension of '(repeat each Element)'extension Tuple16 { // tuple extensions are experimentalextension Tuple16 { // tuple extension must declare conformance to exactly one protocolself.init(string.utf8.map { Int8($0) }) // missing argument label 'array:' in callself.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) // missing argument label 'arrayLiteral:' in callextension Tuple16 { // tuple extension must be written as extension of '(repeat each Element)'extension Tuple16 { // tuple extensions are experimentalextension Tuple16 { // tuple extension must declare conformance to exactly one protocolself.init(array[0], array[1], array[2], array[3], array[4], array[5], array[6], array[7], array[8], array[9], array[10], array[11], array[12], array[13], array[14], array[15]) // 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) {
var string = ""
for i in 0..<16 {
if tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = 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 tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = string
}
}
```string.append(Character(UnicodeScalar(tuple16.0))) // no exact matches in call to initializertuple16 = (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, tuple16.16) // cannot assign to value: 'tuple16' is a 'let' constanttuple16 = (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, tuple16.16) // value of tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') has no member '16'typealias 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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(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: UnsafePointer<Int8>(tuple16))
}
}
//self.init(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>'typealias 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: tuple16.0, 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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(cString: 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-terminatedself.init(cString: 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) // missing argument for parameter 'format' in callself.init(cString: 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) // extraneous argument label 'cString:' in calltypealias 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 tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = string
}
}
extension Tuple16 {
init(string: String) {
self.0 = Int8(string.unicodeScalars.first?.value ?? 0)
self.1 = Int8(string.unicodeScalars.dropFirst().first?.value ?? 0)
self.2 = Int8(string.unicodeScalars.dropFirst(2).first?.value ?? 0)
self.3 = Int8(string.unicodeScalars.dropFirst(3).first?.value ?? 0)
self.4 = Int8(string.unicodeScalars.dropFirst(4).first?.value ?? 0)
self.5 = Int8(string.unicodeScalars.dropFirst(5).first?.value ?? 0)
self.6 = Int8(string.unicodeScalars.dropFirst(6).first?.value ?? 0)
self.7 = Int8(string.unicodeScalars.dropFirst(7).first?.value ?? 0)
self.8 = Int8(string.unicodeScalars.dropFirst(8).first?.value ?? 0)
self.9 = Int8(string.unicodeScalars.dropFirst(9).first?.value ?? 0)
self.10 = Int8(string.unicodeScalars.dropFirst(10).first?.value ?? 0)
self.11 = Int8(string.unicodeScalars.dropFirst(11).first?.value ?? 0)
self.12 = Int8(string.unicodeScalars.dropFirst(12).first?.value ?? 0)
self.13 = Int8(string.unicodeScalars.dropFirst(13).first?.value ?? 0)
self.14 = Int8(string.unicodeScalars.dropFirst(14).first?.value ?? 0)
self.15 = Int8(string.unicodeScalars.dropFirst(15).first?.value ?? 0)
}
}
extension Tuple16 {
init(cString: UnsafePointer<Int8>) {
self.0 = cString[0]
self.1 = cString[1]
self.2 = cString[2]
self.3 = cString[3]
self.4 = cString[4]
self.5 = cString[5]
self.6 = cString[6]
self.7 = cString[7]
self.8 = cString[8]
self.9 = cString[9]
self.10 = cString[10]
self.11 = cString[11]
self.12 = cString[12]
self.13 = cString[13]
self.14 = cString[14]
self.15 = cString[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) {
var string = ""
for i in 0..<16 {
if tuple16.0 == 0 {
break
}
string.append(Character(UnicodeScalar(tuple16.0)))
tuple16 = (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, tuple16.16)
}
self = string
}
}
// Extension to the Tuple16 type that allows initializing a Tuple16 from a String.
extension Tuple16 {
init(string: String) {
self.0 = Int8(string.unicodeScalars.first?.value ?? 0)
self.1 = Int8(string.unicodeScalars.dropFirst().first?.value ?? 0)
self.2 = Int8(string.unicodeScalars.dropFirst(2).first?.value ?? 0)
self.3 = Int8(string.unicodeScalars.dropFirst(3).first?.value ?? 0)
self.4 = Int8(string.unicodeScalars.dropFirst(4).first?.value ?? 0)
self.5 = Int8(string.unicodeScalars.dropFirst(5).first?.value ?? 0)
self.6 = Int8(string.unicodeScalars.dropFirst(6).first?.value ?? 0)
self.7 = Int8(string.unicodeScalars.dropFirst(7).first?.value ?? 0)
self.8 = Int8(string.unicodeScalars.dropFirst(8).first?.value ?? 0)
self.9 = Int8(string.unicodeScalars.dropFirst(9).first?.value ?? 0)
self.10 = Int8(string.unicodeScalars.dropFirst(10).first?.value ?? 0)
self.11 = Int8(string.unicodeScalars.dropFirst(11).first?.value ?? 0)
self.12 = Int8(string.unicodeScalars.dropFirst(12).first?.value ?? 0)
self.13 = Int8(string.unicodeScalars.dropFirst(13).first?.value ?? 0)
self.14 = Int8(string.unicodeScalars.dropFirst(14).first?.value ?? 0)
self.15 = Int8(string.unicodeScalars.dropFirst(15).first?.value ?? 0)
}
}
// Extension to the Tuple16 type that allows initializing a Tuple16 from a C-style null-terminated string.
extension Tuple16 {
init(cString: UnsafePointer<Int8>) {
self.0 = cString[0]
self.1 = cString[1]
self.2 = cString[2]
self.3 = cString[3]
self.4 = cString[4]
self.5 = cString[5]
self.6 = cString[6]
self.7 = cString[7]
self.8 = cString[8]
self.9 = cString[9]
self.10 = cString[10]
self.11 = cString[11]
self.12 = cString[12]
self.13 = cString[13]
self.14 = cString[14]
self.15 = cString[15]
}
}
```string.append(Character(UnicodeScalar(tuple16.0))) // no exact matches in call to initializertuple16 = (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, tuple16.16) // value of tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') has no member '16'tuple16 = (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, tuple16.16) // cannot assign to value: 'tuple16' is a 'let' constantextension Tuple16 { // tuple extensions are experimentalextension Tuple16 { // tuple extension must declare conformance to exactly one protocolextension Tuple16 { // tuple extension must be written as extension of '(repeat each Element)'self.0 = Int8(string.unicodeScalars.first?.value ?? 0) // value pack expansion can only appear inside a function argument list or tuple elementself.1 = Int8(string.unicodeScalars.dropFirst().first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '1'self.2 = Int8(string.unicodeScalars.dropFirst(2).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '2'self.3 = Int8(string.unicodeScalars.dropFirst(3).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '3'self.4 = Int8(string.unicodeScalars.dropFirst(4).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '4'self.5 = Int8(string.unicodeScalars.dropFirst(5).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '5'self.6 = Int8(string.unicodeScalars.dropFirst(6).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '6'self.7 = Int8(string.unicodeScalars.dropFirst(7).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '7'self.8 = Int8(string.unicodeScalars.dropFirst(8).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '8'self.9 = Int8(string.unicodeScalars.dropFirst(9).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '9'self.10 = Int8(string.unicodeScalars.dropFirst(10).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '10'self.11 = Int8(string.unicodeScalars.dropFirst(11).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '11'self.12 = Int8(string.unicodeScalars.dropFirst(12).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '12'self.13 = Int8(string.unicodeScalars.dropFirst(13).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '13'self.14 = Int8(string.unicodeScalars.dropFirst(14).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '14'self.15 = Int8(string.unicodeScalars.dropFirst(15).first?.value ?? 0) // value of tuple type '(repeat each Element)' has no member '15'extension Tuple16 { // tuple extension must be written as extension of '(repeat each Element)'extension Tuple16 { // tuple extension must declare conformance to exactly one protocolextension Tuple16 { // tuple extensions are experimentalself.0 = cString[0] // value pack expansion can only appear inside a function argument list or tuple elementself.1 = cString[1] // value of tuple type '(repeat each Element)' has no member '1'self.2 = cString[2] // value of tuple type '(repeat each Element)' has no member '2'self.3 = cString[3] // value of tuple type '(repeat each Element)' has no member '3'self.4 = cString[4] // value of tuple type '(repeat each Element)' has no member '4'self.5 = cString[5] // value of tuple type '(repeat each Element)' has no member '5'self.6 = cString[6] // value of tuple type '(repeat each Element)' has no member '6'self.7 = cString[7] // value of tuple type '(repeat each Element)' has no member '7'self.8 = cString[8] // value of tuple type '(repeat each Element)' has no member '8'self.9 = cString[9] // value of tuple type '(repeat each Element)' has no member '9'self.10 = cString[10] // value of tuple type '(repeat each Element)' has no member '10'self.11 = cString[11] // value of tuple type '(repeat each Element)' has no member '11'self.12 = cString[12] // value of tuple type '(repeat each Element)' has no member '12'self.13 = cString[13] // value of tuple type '(repeat each Element)' has no member '13'self.14 = cString[14] // value of tuple type '(repeat each Element)' has no member '14'self.15 = cString[15] // value of tuple type '(repeat each Element)' has no member '15'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDim = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDim = CMVideoFormatDescriptionGetDimensions(rhsDesc)
if lhsDim.width != rhsDim.width || lhsDim.height != rhsDim.height {
return false
}
let lhsFourCC = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsFourCC = CMVideoFormatDescriptionGetCodecType(rhsDesc)
if lhsFourCC != rhsFourCC {
return false
}
var lhsBaseAddr = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
var rhsBaseAddr = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
defer {
lhsBaseAddr.deallocate()
rhsBaseAddr.deallocate()
}
CVPixelBufferLockBaseAddress(lhs, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferLockBaseAddress(rhs, CVPixelBufferLockFlags(rawValue: 0))
let lhsStatus = CVPixelBufferGetBaseAddress(lhs, &lhsBaseAddr)
let rhsStatus = CVPixelBufferGetBaseAddress(rhs, &rhsBaseAddr)
if lhsStatus != kCVReturnSuccess || rhsStatus != kCVReturnSuccess {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsPlaneCount = CVPixelBufferGetPlaneCount(lhs)
let rhsPlaneCount = CVPixelBufferGetPlaneCount(rhs)
if lhsBytesPerRow != rhsBytesPerRow || lhsPlaneCount != rhsPlaneCount {
return false
}
for plane in 0..<lhsPlaneCount {
let lhsPlaneBaseAddr = CVPixelBufferGetBaseAddressOfPlane(lhs, plane)
let rhsPlaneBaseAddr = CVPixelBufferGetBaseAddressOfPlane(rhs, plane)
let lhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhs, plane)
let rhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhs, plane)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, plane)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, plane)
if lhsPlaneBytesPerRow != rhsPlaneBytesPerRow || lhsPlaneHeight != rhsPlaneHeight {
return false
}
for row in 0..<lhsPlaneHeight {
let lhsRowBaseAddr = lhsPlaneBaseAddr.advanced(by: row * lhsPlaneBytesPerRow)
let rhsRowBaseAddr = rhsPlaneBaseAddr.advanced(by: row * rhsPlaneBytesPerRow)
if memcmp(lhsRowBaseAddr, rhsRowBaseAddr, lhsPlaneBytesPerRow) != 0 {
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 {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDim = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDim = CMVideoFormatDescriptionGetDimensions(rhsDesc)
if lhsDim.width != rhsDim.width || lhsDim.height != rhsDim.height {
return false
}
let lhsFourCC = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsFourCC = CMVideoFormatDescriptionGetCodecType(rhsDesc)
if lhsFourCC != rhsFourCC {
return false
}
var lhsBaseAddr = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
var rhsBaseAddr = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
defer {
lhsBaseAddr.deallocate()
rhsBaseAddr.deallocate()
}
CVPixelBufferLockBaseAddress(lhs, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferLockBaseAddress(rhs, CVPixelBufferLockFlags(rawValue: 0))
let lhsStatus = CVPixelBufferGetBaseAddress(lhs, &lhsBaseAddr)
let rhsStatus = CVPixelBufferGetBaseAddress(rhs, &rhsBaseAddr)
if lhsStatus != kCVReturnSuccess || rhsStatus != kCVReturnSuccess {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsPlaneCount = CVPixelBufferGetPlaneCount(lhs)
let rhsPlaneCount = CVPixelBufferGetPlaneCount(rhs)
if lhsBytesPerRow != rhsBytesPerRow || lhsPlaneCount != rhsPlaneCount {
return false
}
for plane in 0..<lhsPlaneCount {
let lhsPlaneBaseAddr = CVPixelBufferGetBaseAddressOfPlane(lhs, plane)
let rhsPlaneBaseAddr = CVPixelBufferGetBaseAddressOfPlane(rhs, plane)
let lhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhs, plane)
let rhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhs, plane)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, plane)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, plane)
if lhsPlaneBytesPerRow != rhsPlaneBytesPerRow || lhsPlaneHeight != rhsPlaneHeight {
return false
}
for row in 0..<lhsPlaneHeight {
let lhsRowBaseAddr = lhsPlaneBaseAddr.advanced(by: row * lhsPlaneBytesPerRow)
let rhsRowBaseAddr = rhsPlaneBaseAddr.advanced(by: row * rhsPlaneBytesPerRow)
if memcmp(lhsRowBaseAddr, rhsRowBaseAddr, lhsPlaneBytesPerRow) != 0 {
return false
}
}
}
return true
}
```let lhsDesc = CMSampleBufferGetFormatDescription(lhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet rhsDesc = CMSampleBufferGetFormatDescription(rhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet lhsDim = CMVideoFormatDescriptionGetDimensions(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet rhsDim = CMVideoFormatDescriptionGetDimensions(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet lhsFourCC = CMVideoFormatDescriptionGetCodecType(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet rhsFourCC = CMVideoFormatDescriptionGetCodecType(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet lhsStatus = CVPixelBufferGetBaseAddress(lhs, &lhsBaseAddr) // extra argument in calllet rhsStatus = CVPixelBufferGetBaseAddress(rhs, &rhsBaseAddr) // extra argument in calllet lhsRowBaseAddr = lhsPlaneBaseAddr.advanced(by: row * lhsPlaneBytesPerRow) // value of optional type 'UnsafeMutableRawPointer?' must be unwrapped to refer to member 'advanced' of wrapped base type 'UnsafeMutableRawPointer'let rhsRowBaseAddr = rhsPlaneBaseAddr.advanced(by: row * rhsPlaneBytesPerRow) // value of optional type 'UnsafeMutableRawPointer?' must be unwrapped to refer to member 'advanced' of wrapped base type 'UnsafeMutableRawPointer'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
if lhs.width != rhs.width || lhs.height != rhs.height {
return false
}
if lhs.pixelFormatType != rhs.pixelFormatType {
return false
}
let lhsData = lhs.data
let rhsData = rhs.data
let lhsBytesPerRow = lhs.bytesPerRow
let rhsBytesPerRow = rhs.bytesPerRow
let lhsBytesPerPixel = lhs.bytesPerRow / lhs.width
let rhsBytesPerPixel = rhs.bytesPerRow / rhs.width
let lhsBytesCount = lhsBytesPerRow * lhs.height
let rhsBytesCount = rhsBytesPerRow * rhs.height
var isEqual = true
for i in 0..<lhsBytesCount {
if lhsData![i] != rhsData![i] {
isEqual = false
break
}
}
return isEqual
}```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 {
if lhs.width != rhs.width || lhs.height != rhs.height {
return false
}
if lhs.pixelFormatType != rhs.pixelFormatType {
return false
}
let lhsData = lhs.data
let rhsData = rhs.data
let lhsBytesPerRow = lhs.bytesPerRow
let rhsBytesPerRow = rhs.bytesPerRow
let lhsBytesPerPixel = lhs.bytesPerRow / lhs.width
let rhsBytesPerPixel = rhs.bytesPerRow / rhs.width
let lhsBytesCount = lhsBytesPerRow * lhs.height
let rhsBytesCount = rhsBytesPerRow * rhs.height
var isEqual = true
for i in 0..<lhsBytesCount {
if lhsData![i] != rhsData![i] {
isEqual = false
break
}
}
return isEqual
}
```if lhs.width != rhs.width || lhs.height != rhs.height { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'if lhs.width != rhs.width || lhs.height != rhs.height { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'if lhs.width != rhs.width || lhs.height != rhs.height { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'if lhs.width != rhs.width || lhs.height != rhs.height { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'if lhs.pixelFormatType != rhs.pixelFormatType { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'if lhs.pixelFormatType != rhs.pixelFormatType { // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'let lhsData = lhs.data // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'data'let rhsData = rhs.data // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'data'let lhsBytesPerRow = lhs.bytesPerRow // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'bytesPerRow'let rhsBytesPerRow = rhs.bytesPerRow // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'bytesPerRow'let lhsBytesPerPixel = lhs.bytesPerRow / lhs.width // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'bytesPerRow'let lhsBytesPerPixel = lhs.bytesPerRow / lhs.width // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'let rhsBytesPerPixel = rhs.bytesPerRow / rhs.width // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'bytesPerRow'let rhsBytesPerPixel = rhs.bytesPerRow / rhs.width // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'let lhsBytesCount = lhsBytesPerRow * lhs.height // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'let rhsBytesCount = rhsBytesPerRow * rhs.height // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return lhs.width == rhs.width &&
lhs.height == rhs.height &&
lhs.pixelFormatType == rhs.pixelFormatType &&
lhs.baseAddress == rhs.baseAddress
}```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 lhs.width == rhs.width &&
lhs.height == rhs.height &&
lhs.pixelFormatType == rhs.pixelFormatType &&
lhs.baseAddress == rhs.baseAddress
}
```return lhs.width == rhs.width && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'return lhs.width == rhs.width && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'lhs.height == rhs.height && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'lhs.height == rhs.height && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'lhs.pixelFormatType == rhs.pixelFormatType && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'lhs.pixelFormatType == rhs.pixelFormatType && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'lhs.baseAddress == rhs.baseAddress // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'lhs.baseAddress == rhs.baseAddress // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return lhs.width == rhs.width &&
lhs.height == rhs.height &&
lhs.pixelFormatType == rhs.pixelFormatType &&
lhs.baseAddress == rhs.baseAddress
}
func !=(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return !(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 lhs.width == rhs.width &&
lhs.height == rhs.height &&
lhs.pixelFormatType == rhs.pixelFormatType &&
lhs.baseAddress == rhs.baseAddress
}
// 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 !(lhs == rhs)
}
```return lhs.width == rhs.width && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'return lhs.width == rhs.width && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'width'lhs.height == rhs.height && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'lhs.height == rhs.height && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'height'lhs.pixelFormatType == rhs.pixelFormatType && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'lhs.pixelFormatType == rhs.pixelFormatType && // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'pixelFormatType'lhs.baseAddress == rhs.baseAddress // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'lhs.baseAddress == rhs.baseAddress // value of type 'CVPixelBuffer' (aka 'CVBuffer') has no member 'baseAddress'import CoreVideo```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 lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsPlaneCount = CVPixelBufferGetPlaneCount(lhs)
let rhsPlaneCount = CVPixelBufferGetPlaneCount(rhs)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
let lhsBytesPerPixel = CVPixelBufferGetBytesPerRow(lhs) / CVPixelBufferGetWidth(lhs)
let rhsBytesPerPixel = CVPixelBufferGetBytesPerRow(rhs) / CVPixelBufferGetWidth(rhs)
let lhsSize = CVPixelBufferGetDataSize(lhs)
let rhsSize = CVPixelBufferGetDataSize(rhs)
let lhsPlaneAddresses = UnsafeMutablePointer<UnsafeMutablePointer<Void>?>.allocate(capacity: lhsPlaneCount)
let rhsPlaneAddresses = UnsafeMutablePointer<UnsafeMutablePointer<Void>?>.allocate(capacity: rhsPlaneCount)
CVPixelBufferGetBaseAddressOfPlane(lhs, 0, lhsPlaneAddresses)
CVPixelBufferGetBaseAddressOfPlane(rhs, 0, rhsPlaneAddresses)
let lhsPlaneAddress = lhsPlaneAddresses[0]
let rhsPlaneAddress = rhsPlaneAddresses[0]
let lhsPlaneSize = CVPixelBufferGetDataSizeOfPlane(lhs, 0)
let rhsPlaneSize = CVPixelBufferGetDataSizeOfPlane(rhs, 0)
let lhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhs, 0)
let rhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhs, 0)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, 0)
let lhsPlaneWidth = CVPixelBufferGetWidthOfPlane(lhs, 0)
let rhsPlaneWidth = CVPixelBufferGetWidthOfPlane(rhs, 0)
let lhsPlaneBytesPerPixel = lhsPlaneBytesPerRow / lhsPlaneWidth
let rhsPlaneBytesPerPixel = rhsPlaneBytesPerRow / rhsPlaneWidth
let lhsPlaneBaseAddress = CVPixelBufferGetBaseAddressOfPlane(lhs, 0)
let rhsPlaneBaseAddress = CVPixelBufferGetBaseAddressOfPlane(rhs, 0)
let lhsPlaneSize = CVPixelBufferGetDataSizeOfPlane(lhs, 0)
let rhsPlaneSize = CVPixelBufferGetDataSizeOfPlane(rhs, 0)
let lhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhs, 0)
let rhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhs, 0)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, 0)
// XCTAssertTrue failedimport CoreVideo```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 lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
let lhsBytesPerImage = CVPixelBufferGetBytesPerRow(lhs) * CVPixelBufferGetHeight(lhs)
let rhsBytesPerImage = CVPixelBufferGetBytesPerRow(rhs) * CVPixelBufferGetHeight(rhs)
let lhsExtendedPixels = CVPixelBufferGetExtendedPixels(lhs)
let rhsExtendedPixels = CVPixelBufferGetExtendedPixels(rhs)
let lhsPixelFormatType = CVPixelBufferGetPixelFormatType(lhs)
let rhsPixelFormatType = CVPixelBufferGetPixelFormatType(rhs)
let lhsPlaneCount = CVPixelBufferGetPlaneCount(lhs)
let rhsPlaneCount = CVPixelBufferGetPlaneCount(rhs)
let lhsWidth = CVPixelBufferGetWidth(lhs)
let rhsWidth = CVPixelBufferGetWidth(rhs)
let lhsHeight = CVPixelBufferGetHeight(lhs)
let rhsHeight = CVPixelBufferGetHeight(rhs)
let lhsBytesPerPlane = CVPixelBufferGetBytesPerRowOfPlane(lhs, 0) * CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsBytesPerPlane = CVPixelBufferGetBytesPerRowOfPlane(rhs, 0) * CVPixelBufferGetHeightOfPlane(rhs, 0)
let lhsPlaneBaseAddress = CVPixelBufferGetBaseAddressOfPlane(lhs, 0)
let rhsPlaneBaseAddress = CVPixelBufferGetBaseAddressOfPlane(rhs, 0)
let lhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhs, 0)
let rhsPlaneBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhs, 0)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, 0)
let lhsPlaneExtendedPixels = CVPixelBufferGetExtendedPixelsOfPlane(lhs, 0)
let rhsPlaneExtendedPixels = CVPixelBufferGetExtendedPixelsOfPlane(rhs, 0)
let lhsPlanePixelFormatType = CVPixelBufferGetPixelFormatTypeOfPlane(lhs, 0)
let rhsPlanePixelFormatType = CVPixelBufferGetPixelFormatTypeOfPlane(rhs, 0)
let lhsPlaneWidth = CVPixelBufferGetWidthOfPlane(lhs, 0)
let rhsPlaneWidth = CVPixelBufferGetWidthOfPlane(rhs, 0)
let lhsPlaneHeight = CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsPlaneHeight = CVPixelBufferGetHeightOfPlane(rhs, 0)
let lhsPlaneBytesPerImage = CVPixelBufferGetBytesPerRowOfPlane(lhs, 0) * CVPixelBufferGetHeightOfPlane(lhs, 0)
let rhsPlaneBytesPerImage = CVPixelBufferGetBytesPerRowOfPlane(rhs, 0) * CVPixelBufferGetHeightOfPlane(rhs, 0)
let lhsPlaneBase // XCTAssertTrue failedimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
return lhsDimensions.width == rhsDimensions.width && lhsDimensions.height == rhsDimensions.height && lhsPixelFormat == rhsPixelFormat
}
func !=(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
return !(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 {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
return lhsDimensions.width == rhsDimensions.width && lhsDimensions.height == rhsDimensions.height && lhsPixelFormat == rhsPixelFormat
}
// 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 !(lhs == rhs)
}
```let lhsDesc = CMSampleBufferGetFormatDescription(lhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet rhsDesc = CMSampleBufferGetFormatDescription(rhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
let lhsRowBytes = CVPixelBufferGetBytesPerRow(lhs)
let rhsRowBytes = CVPixelBufferGetBytesPerRow(rhs)
let lhsSize = CVPixelBufferGetDataSize(lhs)
let rhsSize = CVPixelBufferGetDataSize(rhs)
return lhsDimensions == rhsDimensions &&
lhsPixelFormat == rhsPixelFormat &&
lhsData == rhsData &&
lhsRowBytes == rhsRowBytes &&
lhsSize == rhsSize
}```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 lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
let lhsRowBytes = CVPixelBufferGetBytesPerRow(lhs)
let rhsRowBytes = CVPixelBufferGetBytesPerRow(rhs)
let lhsSize = CVPixelBufferGetDataSize(lhs)
let rhsSize = CVPixelBufferGetDataSize(rhs)
return lhsDimensions == rhsDimensions &&
lhsPixelFormat == rhsPixelFormat &&
lhsData == rhsData &&
lhsRowBytes == rhsRowBytes &&
lhsSize == rhsSize
}
```let lhsDesc = CMSampleBufferGetFormatDescription(lhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet rhsDesc = CMSampleBufferGetFormatDescription(rhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsSize = CVPixelBufferGetDataSize(lhs)
let rhsSize = CVPixelBufferGetDataSize(rhs)
return lhsDimensions == rhsDimensions &&
lhsPixelFormat == rhsPixelFormat &&
lhsData == rhsData &&
lhsBytesPerRow == rhsBytesPerRow &&
lhsSize == rhsSize
}```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 lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
let lhsData = CVPixelBufferGetBaseAddress(lhs)
let rhsData = CVPixelBufferGetBaseAddress(rhs)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
let lhsSize = CVPixelBufferGetDataSize(lhs)
let rhsSize = CVPixelBufferGetDataSize(rhs)
return lhsDimensions == rhsDimensions &&
lhsPixelFormat == rhsPixelFormat &&
lhsData == rhsData &&
lhsBytesPerRow == rhsBytesPerRow &&
lhsSize == rhsSize
}
```let lhsDesc = CMSampleBufferGetFormatDescription(lhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet rhsDesc = CMSampleBufferGetFormatDescription(rhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
return lhsDimensions.width == rhsDimensions.width &&
lhsDimensions.height == rhsDimensions.height &&
lhsPixelFormat == rhsPixelFormat &&
CVPixelBufferEqual(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 {
let lhsDesc = CMSampleBufferGetFormatDescription(lhs)
let rhsDesc = CMSampleBufferGetFormatDescription(rhs)
let lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc)
let rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc)
let lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc)
let rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc)
return lhsDimensions.width == rhsDimensions.width &&
lhsDimensions.height == rhsDimensions.height &&
lhsPixelFormat == rhsPixelFormat &&
CVPixelBufferEqual(lhs, rhs)
}
```let lhsDesc = CMSampleBufferGetFormatDescription(lhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet rhsDesc = CMSampleBufferGetFormatDescription(rhs) // cannot find 'CMSampleBufferGetFormatDescription' in scopelet lhsDimensions = CMVideoFormatDescriptionGetDimensions(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet rhsDimensions = CMVideoFormatDescriptionGetDimensions(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetDimensions' in scopelet lhsPixelFormat = CMVideoFormatDescriptionGetCodecType(lhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopelet rhsPixelFormat = CMVideoFormatDescriptionGetCodecType(rhsDesc) // cannot find 'CMVideoFormatDescriptionGetCodecType' in scopeCVPixelBufferEqual(lhs, rhs) // cannot find 'CVPixelBufferEqual' in scopestruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { $0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) { $0 } }
}```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.withUnsafeBufferPointer { $0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) { $0 } }
}
// Example usage
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```return items.withUnsafeBufferPointer { $0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) { $0 } } // type of expression is ambiguous without a type annotationstruct 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 value = $0.value
return PublicItem(value: 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 value = $0.value
return PublicItem(value: value)
}
}
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems)
```let 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.withUnsafeBufferPointer { $0.map { PublicItem(value: $0.value) } }
}
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer { $0.map { PrivateItem(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.withUnsafeBufferPointer { $0.map { PublicItem(value: $0.value) } }
}
// Function to convert an array of structs with public integer fields into an array of structs with private integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer { $0.map { PrivateItem(value: $0.value) } }
}
// Test
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
let privateItemsAgain = conceal(items: publicItems)
print(privateItems) // [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
print(privateItemsAgain) // [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
```return items.withUnsafeBufferPointer { $0.map { 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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PrivateItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Function to convert an array of structs with public integer fields into an array of structs with private integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PrivateItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Example usage
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
let privateItemsAgain = conceal(items: publicItems)
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Example usage
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Test
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Test
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Example usage
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Example usage
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
print(publicItems) // [PublicItem(value: 1), PublicItem(value: 2), PublicItem(value: 3)]
```struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PrivateItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}```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.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PublicItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Function to convert an array of structs with public integer fields into an array of structs with private integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func conceal(items: [PublicItem]) -> [PrivateItem] {
return items.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: PrivateItem.self, capacity: items.count) {
Array(UnsafeBufferPointer(start: $0, count: items.count))
}
}
}
// Test
let privateItems = [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
let publicItems = reveal(items: privateItems)
let privateItems2 = conceal(items: publicItems)
print(privateItems2) // [PrivateItem(value: 1), PrivateItem(value: 2), PrivateItem(value: 3)]
```enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let rhsComponents = rhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let lhsVersion = lhsComponents.first!
let rhsVersion = rhsComponents.first!
let lhsTag = lhsComponents.last?.first
let rhsTag = rhsComponents.last?.first
let lhsTagNumber = lhsComponents.last?.last
let rhsTagNumber = rhsComponents.last?.last
let lhsTagNumberInt = lhsTagNumber.flatMap { Int($0) }
let rhsTagNumberInt = rhsTagNumber.flatMap { Int($0) }
let lhsVersionInt = lhsVersion.flatMap { Int($0) }
let rhsVersionInt = rhsVersion.flatMap { Int($0) }
if lhsVersionInt == rhsVersionInt {
if lhsTag == rhsTag {
if lhsTagNumberInt == rhsTagNumberInt {
return .orderedSame
} else if lhsTagNumberInt == nil {
return .orderedAscending
} else if rhsTagNumberInt == nil {
return .orderedDescending
} else {
return lhsTagNumberInt! < rhsTagNumberInt! ? .orderedAscending : .orderedDescending
}
} else if lhsTag == "alpha" {
return .orderedAscending
} else if rhsTag == "alpha" {
return .orderedDescending
} else if lhsTag == "beta" {
return .orderedAscending
} else if rhsTag == "beta" {
return .orderedDescending
} else {
return .orderedSame
}
} else {
return lhsVersionInt! < rhsVersionInt! ? .orderedAscending : .orderedDescending
}
}```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: ".").map { $0.components(separatedBy: "-") }
let rhsComponents = rhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let lhsVersion = lhsComponents.first!
let rhsVersion = rhsComponents.first!
let lhsTag = lhsComponents.last?.first
let rhsTag = rhsComponents.last?.first
let lhsTagNumber = lhsComponents.last?.last
let rhsTagNumber = rhsComponents.last?.last
let lhsTagNumberInt = lhsTagNumber.flatMap { Int($0) }
let rhsTagNumberInt = rhsTagNumber.flatMap { Int($0) }
let lhsVersionInt = lhsVersion.flatMap { Int($0) }
let rhsVersionInt = rhsVersion.flatMap { Int($0) }
if lhsVersionInt == rhsVersionInt {
if lhsTag == rhsTag {
if lhsTagNumberInt == rhsTagNumberInt {
return .orderedSame
} else if lhsTagNumberInt == nil {
return .orderedAscending
} else if rhsTagNumberInt == nil {
return .orderedDescending
} else {
return lhsTagNumberInt! < rhsTagNumberInt! ? .orderedAscending : .orderedDescending
}
} else if lhsTag == "alpha" {
return .orderedAscending
} else if rhsTag == "alpha" {
return .orderedDescending
} else if lhsTag == "beta" {
return .orderedAscending
} else if rhsTag == "beta" {
return .orderedDescending
} else {
return .orderedSame
}
} else {
return lhsVersionInt! < rhsVersionInt! ? .orderedAscending : .orderedDescending
}
}
// Usage example
let versions = ["1.0.0", "1.0.0-alpha", "1.0.0-alpha.1", "1.0.0-alpha.2", "1.0.0-beta", "1.0.0-beta.2", "1.0.0-beta.11", "1.0.0-rc.1", "1.0.0-rc.1+build.1", "1.0.0+20130313144700", "1.0.0-alpha+beta", "1.0.0-alpha+beta+gamma", "1.0.0-alpha+beta+gamma+delta", "1.0.0-alpha+beta+gamma+delta+epsilon"]
let sortedVersions = versions.sorted(by: compareVersions)
print(sortedVersions)
```let lhsVersionInt = lhsVersion.flatMap { Int($0) } // 'flatMap' is deprecated: Please use compactMap(_:) for the case where closure returns an optional valuelet rhsVersionInt = rhsVersion.flatMap { Int($0) } // 'flatMap' is deprecated: Please use compactMap(_:) for the case where closure returns an optional valuereturn lhsVersionInt! < rhsVersionInt! ? .orderedAscending : .orderedDescending // cannot force unwrap value of non-optional type '[Int]'return lhsVersionInt! < rhsVersionInt! ? .orderedAscending : .orderedDescending // binary operator '<' cannot be applied to two '[Int]' operandsreturn lhsVersionInt! < rhsVersionInt! ? .orderedAscending : .orderedDescending // cannot force unwrap value of non-optional type '[Int]'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]
if lhsComponent == rhsComponent {
continue
}
if lhsComponent.hasPrefix("alpha") && !rhsComponent.hasPrefix("alpha") {
return .orderedAscending
}
if rhsComponent.hasPrefix("alpha") && !lhsComponent.hasPrefix("alpha") {
return .orderedDescending
}
if lhsComponent.hasPrefix("beta") && !rhsComponent.hasPrefix("beta") {
return .orderedAscending
}
if rhsComponent.hasPrefix("beta") && !lhsComponent.hasPrefix("beta") {
return .orderedDescending
}
if let lhsNumber = Int(lhsComponent), let rhsNumber = Int(rhsComponent) {
if lhsNumber < rhsNumber {
return .orderedAscending
}
if lhsNumber > rhsNumber {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
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 lhsComponent == rhsComponent {
continue
}
if lhsComponent.hasPrefix("alpha") && !rhsComponent.hasPrefix("alpha") {
return .orderedAscending
}
if rhsComponent.hasPrefix("alpha") && !lhsComponent.hasPrefix("alpha") {
return .orderedDescending
}
if lhsComponent.hasPrefix("beta") && !rhsComponent.hasPrefix("beta") {
return .orderedAscending
}
if rhsComponent.hasPrefix("beta") && !lhsComponent.hasPrefix("beta") {
return .orderedDescending
}
if let lhsNumber = Int(lhsComponent), let rhsNumber = Int(rhsComponent) {
if lhsNumber < rhsNumber {
return .orderedAscending
}
if lhsNumber > rhsNumber {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let rhsComponents = rhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let lhsVersion = lhsComponents.first!
let rhsVersion = rhsComponents.first!
let lhsTag = lhsComponents.last?.first
let rhsTag = rhsComponents.last?.first
let lhsTagPriority: Int
let rhsTagPriority: Int
switch (lhsTag, rhsTag) {
case ("alpha", "alpha"):
lhsTagPriority = 0
rhsTagPriority = 0
case ("alpha", "beta"):
lhsTagPriority = 1
rhsTagPriority = 0
case ("alpha", _):
lhsTagPriority = 1
rhsTagPriority = 1
case ("beta", "alpha"):
lhsTagPriority = 0
rhsTagPriority = 1
case ("beta", "beta"):
lhsTagPriority = 0
rhsTagPriority = 0
case ("beta", _):
lhsTagPriority = 1
rhsTagPriority = 1
case (_, "alpha"):
lhsTagPriority = 0
rhsTagPriority = 1
case (_, "beta"):
lhsTagPriority = 1
rhsTagPriority = 1
default:
lhsTagPriority = 1
rhsTagPriority = 1
}
let lhsVersionPriority = lhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) }
let rhsVersionPriority = rhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) }
let lhsTagPriorityPriority = lhsTagPriority * 1000000
let rhsTagPriorityPriority = rhsTagPriority * 1000000
let lhsPriority = lhsVersionPriority + lhsTagPriorityPriority
let rhsPriority = rhsVersionPriority + rhsTagPriorityPriority
if lhsPriority == rhsPriority {
return .orderedSame
} else if lhsPriority < rhsPriority {
return .orderedAscending
} else {
return .orderedDescending
}
}
func compareVersions(_ lhs: String, _ rhs: String) -> Bool {
return compareVersions(lhs, rhs) == .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: ".").map { $0.components(separatedBy: "-") }
let rhsComponents = rhs.components(separatedBy: ".").map { $0.components(separatedBy: "-") }
let lhsVersion = lhsComponents.first!
let rhsVersion = rhsComponents.first!
let lhsTag = lhsComponents.last?.first
let rhsTag = rhsComponents.last?.first
let lhsTagPriority: Int
let rhsTagPriority: Int
switch (lhsTag, rhsTag) {
case ("alpha", "alpha"):
lhsTagPriority = 0
rhsTagPriority = 0
case ("alpha", "beta"):
lhsTagPriority = 1
rhsTagPriority = 0
case ("alpha", _):
lhsTagPriority = 1
rhsTagPriority = 1
case ("beta", "alpha"):
lhsTagPriority = 0
rhsTagPriority = 1
case ("beta", "beta"):
lhsTagPriority = 0
rhsTagPriority = 0
case ("beta", _):
lhsTagPriority = 1
rhsTagPriority = 1
case (_, "alpha"):
lhsTagPriority = 0
rhsTagPriority = 1
case (_, "beta"):
lhsTagPriority = 1
rhsTagPriority = 1
default:
lhsTagPriority = 1
rhsTagPriority = 1
}
let lhsVersionPriority = lhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) }
let rhsVersionPriority = rhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) }
let lhsTagPriorityPriority = lhsTagPriority * 1000000
let rhsTagPriorityPriority = rhsTagPriority * 1000000
let lhsPriority = lhsVersionPriority + lhsTagPriorityPriority
let rhsPriority = rhsVersionPriority + rhsTagPriorityPriority
if lhsPriority == rhsPriority {
return .orderedSame
} else if lhsPriority < rhsPriority {
return .orderedAscending
} else {
return .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 Bool.
func compareVersions(_ lhs: String, _ rhs: String) -> Bool {
return compareVersions(lhs, rhs) == .orderedAscending
}
```let lhsVersionPriority = lhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) } // missing argument label 'into:' in calllet rhsVersionPriority = rhsVersion.reduce(0) { $0 + ($1.wholeNumberValue ?? 0) } // missing argument label 'into:' in callenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.split(separator: ".").map { Int($0)! }
let rhsComponents = rhs.split(separator: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
func isValidVersion(_ version: String) -> Bool {
let components = version.split(separator: ".")
if components.count < 3 {
return false
}
for component in components {
if component.contains("-") {
let subComponents = component.split(separator: "-")
if subComponents.count != 2 {
return false
}
if subComponents[0] != "alpha" && subComponents[0] != "beta" {
return false
}
if Int(subComponents[1]) == nil {
return false
}
} else {
if Int(component) == nil {
return false
}
}
}
return true
}```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.split(separator: ".").map { Int($0)! }
let rhsComponents = rhs.split(separator: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// Function that checks if the version number string is valid with respect to semantic versioning specification including "alpha" and "beta" tags.
func isValidVersion(_ version: String) -> Bool {
let components = version.split(separator: ".")
if components.count < 3 {
return false
}
for component in components {
if component.contains("-") {
let subComponents = component.split(separator: "-")
if subComponents.count != 2 {
return false
}
if subComponents[0] != "alpha" && subComponents[0] != "beta" {
return false
}
if Int(subComponents[1]) == nil {
return false
}
} else {
if Int(component) == nil {
return false
}
}
}
return true
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split version number strings into arrays of strings containing only numbers and tags.
let lhsComponents = lhs.components(separatedBy: CharacterSet.alphanumerics.inverted)
let rhsComponents = rhs.components(separatedBy: CharacterSet.alphanumerics.inverted)
// If one of the version number strings is empty, the other one is greater.
if lhsComponents.isEmpty {
return rhsComponents.isEmpty ? .orderedSame : .orderedDescending
} else if rhsComponents.isEmpty {
return .orderedAscending
}
// Compare each component of the version number strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// If one of the components is empty, the other one is greater.
if lhsComponent.isEmpty {
return rhsComponent.isEmpty ? .orderedSame : .orderedDescending
} else if rhsComponent.isEmpty {
return .orderedAscending
}
// If one of the components is a tag, the other one is greater.
if lhsComponent.hasPrefix("alpha") {
return rhsComponent.hasPrefix("alpha") ? .orderedSame : .orderedDescending
} else if rhsComponent.hasPrefix("alpha") {
return .orderedAscending
} else if lhsComponent.hasPrefix("beta") {
return rhsComponent.hasPrefix("beta") ? .orderedSame : .orderedDescending
} else if rhsComponent.hasPrefix("beta") {
return .orderedAscending
}
// If one of the components is a number, the other one is greater.
if let lhsNumber = Int(lhsComponent), let rhsNumber = Int(rhsComponent) {
if lhsNumber < rhsNumber {
return .orderedAscending
} else if lhsNumber > rhsNumber {
return .orderedDescending
}
} else if let _ = Int(lhsComponent) {
return .orderedDescending
} else if let _ = Int(rhsComponent) {
return .orderedAscending
}
}
// If all components are equal, the version number strings are equal.
return .orderedSame
}
func compareVersions(_ lhs: String, _ rhs: String) -> Bool {
return compareVersions(lhs, rhs) == .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 {
// Split version number strings into arrays of strings containing only numbers and tags.
let lhsComponents = lhs.components(separatedBy: CharacterSet.alphanumerics.inverted)
let rhsComponents = rhs.components(separatedBy: CharacterSet.alphanumerics.inverted)
// If one of the version number strings is empty, the other one is greater.
if lhsComponents.isEmpty {
return rhsComponents.isEmpty ? .orderedSame : .orderedDescending
} else if rhsComponents.isEmpty {
return .orderedAscending
}
// Compare each component of the version number strings.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
// If one of the components is empty, the other one is greater.
if lhsComponent.isEmpty {
return rhsComponent.isEmpty ? .orderedSame : .orderedDescending
} else if rhsComponent.isEmpty {
return .orderedAscending
}
// If one of the components is a tag, the other one is greater.
if lhsComponent.hasPrefix("alpha") {
return rhsComponent.hasPrefix("alpha") ? .orderedSame : .orderedDescending
} else if rhsComponent.hasPrefix("alpha") {
return .orderedAscending
} else if lhsComponent.hasPrefix("beta") {
return rhsComponent.hasPrefix("beta") ? .orderedSame : .orderedDescending
} else if rhsComponent.hasPrefix("beta") {
return .orderedAscending
}
// If one of the components is a number, the other one is greater.
if let lhsNumber = Int(lhsComponent), let rhsNumber = Int(rhsComponent) {
if lhsNumber < rhsNumber {
return .orderedAscending
} else if lhsNumber > rhsNumber {
return .orderedDescending
}
} else if let _ = Int(lhsComponent) {
return .orderedDescending
} else if let _ = Int(rhsComponent) {
return .orderedAscending
}
}
// If all components are equal, the version number strings are equal.
return .orderedSame
}
// 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 boolean value.
func compareVersions(_ lhs: String, _ rhs: String) -> Bool {
return compareVersions(lhs, rhs) == .orderedAscending
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { Int($0)! }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
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: ".").map { Int($0)! }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// 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: ".").map { Int($0)! }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
// 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: ".").map { Int($0)! }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0)! }
let minCount = min(lhsComponents.count, rhsComponents.count)
for i in 0..<minCount {
if lhsComponents[i] < rhsComponents[i] {
return .orderedAscending
} else if lhsComponents[i] > rhsComponents[i] {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let maxComponentsCount = max(lhsComponents.count, rhsComponents.count)
for i in 0 ..< maxComponentsCount {
let lhsComponent = i < lhsComponents.count ? lhsComponents[i] : 0
let rhsComponent = i < rhsComponents.count ? rhsComponents[i] : 0
if lhsComponent < rhsComponent {
return .orderedAscending
} else if lhsComponent > rhsComponent {
return .orderedDescending
}
}
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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let maxComponentsCount = max(lhsComponents.count, rhsComponents.count)
for i in 0 ..< maxComponentsCount {
let lhsComponent = i < lhsComponents.count ? lhsComponents[i] : 0
let rhsComponent = i < rhsComponents.count ? rhsComponents[i] : 0
if lhsComponent < rhsComponent {
return .orderedAscending
} else if lhsComponent > rhsComponent {
return .orderedDescending
}
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let maxComponentsCount = max(lhsComponents.count, rhsComponents.count)
for i in 0 ..< maxComponentsCount {
let lhsComponent = i < lhsComponents.count ? lhsComponents[i] : 0
let rhsComponent = i < rhsComponents.count ? rhsComponents[i] : 0
if lhsComponent < rhsComponent {
return .orderedAscending
} else if lhsComponent > rhsComponent {
return .orderedDescending
}
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let maxComponentsCount = max(lhsComponents.count, rhsComponents.count)
for i in 0 ..< maxComponentsCount {
let lhsComponent = i < lhsComponents.count ? lhsComponents[i] : 0
let rhsComponent = i < rhsComponents.count ? rhsComponents[i] : 0
if lhsComponent < rhsComponent {
return .orderedAscending
} else if lhsComponent > rhsComponent {
return .orderedDescending
}
}
return .orderedSame
}
// 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: ".").map { Int($0) ?? 0 }
let rhsComponents = rhs.components(separatedBy: ".").map { Int($0) ?? 0 }
let maxComponentsCount = max(lhsComponents.count, rhsComponents.count)
for i in 0 ..< maxComponentsCount {
let lhsComponent = i < lhsComponents.count ? lhsComponents[i] : 0
let rhsComponent = i < rhsComponents.count ? rhsComponents[i] : 0
if lhsComponent < rhsComponent {
return .orderedAscending
} else if lhsComponent > rhsComponent {
return .orderedDescending
}
}
return .orderedSame
}
// 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: "."). // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Split version number strings into arrays of strings using "." as a separator.
let lhsComponents = lhs.split(separator: ".").map(String.init)
let rhsComponents = rhs.split(separator: ".").map(String.init)
// Define a function that compares two version number components.
func compareComponent(_ lhs: String, _ rhs: String) -> ComparisonResult {
// If both components are numeric, compare them as integers.
if let lhsInt = Int(lhs), let rhsInt = Int(rhs) {
return lhsInt < rhsInt ? .orderedAscending : (lhsInt == rhsInt ? .orderedSame : .orderedDescending)
}
// If both components are alphanumeric, compare them as strings.
if let lhsInt = Int(lhs), let rhsInt = Int(rhs) {
return lhsInt < rhsInt ? .orderedAscending : (lhsInt == rhsInt ? .orderedSame : .orderedDescending)
}
// If one component is numeric and another is alphanumeric, the numeric component is considered less than the alphanumeric component.
if let _ = Int(lhs), let _ = Int(rhs) {
return .orderedAscending
}
// If one component is alphanumeric and another is numeric, the alphanumeric component is considered greater than the numeric component.
if let _ = Int(lhs), let _ = Int(rhs) {
return .orderedDescending
}
// If both components are alphanumeric, compare them as strings.
return lhs < rhs ? .orderedAscending : (lhs == rhs ? .orderedSame : .orderedDescending)
}
// Compare version number components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let result = compareComponent(lhsComponent, rhsComponent)
if result != .orderedSame {
return result
}
}
// If one version number has more components than another, the version number with more components is considered greater.
return lhsComponents.count < rhsComponents.count ? .orderedAscending : .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 version number strings into arrays of strings using "." as a separator.
let lhsComponents = lhs.split(separator: ".").map(String.init)
let rhsComponents = rhs.split(separator: ".").map(String.init)
// Define a function that compares two version number components.
func compareComponent(_ lhs: String, _ rhs: String) -> ComparisonResult {
// If both components are numeric, compare them as integers.
if let lhsInt = Int(lhs), let rhsInt = Int(rhs) {
return lhsInt < rhsInt ? .orderedAscending : (lhsInt == rhsInt ? .orderedSame : .orderedDescending)
}
// If both components are alphanumeric, compare them as strings.
if let lhsInt = Int(lhs), let rhsInt = Int(rhs) {
return lhsInt < rhsInt ? .orderedAscending : (lhsInt == rhsInt ? .orderedSame : .orderedDescending)
}
// If one component is numeric and another is alphanumeric, the numeric component is considered less than the alphanumeric component.
if let _ = Int(lhs), let _ = Int(rhs) {
return .orderedAscending
}
// If one component is alphanumeric and another is numeric, the alphanumeric component is considered greater than the numeric component.
if let _ = Int(lhs), let _ = Int(rhs) {
return .orderedDescending
}
// If both components are alphanumeric, compare them as strings.
return lhs < rhs ? .orderedAscending : (lhs == rhs ? .orderedSame : .orderedDescending)
}
// Compare version number components.
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let result = compareComponent(lhsComponent, rhsComponent)
if result != .orderedSame {
return result
}
}
// If one version number has more components than another, the version number with more components is considered greater.
return lhsComponents.count < rhsComponents.count ? .orderedAscending : .orderedSame
}
// Test cases.
compareVersions("1.0.0", "1.0.0") // .orderedSame
compareVersions("1.0.0", "1.0.1") // .orderedAscending
compareVersions("1.0.0", "1.0.0-alpha") // .orderedDescending
compareVersions("1.0.0-alpha", "1.0.0-alpha.1") // .orderedAscending
compareVersions("1.0.0-alpha.1", "1.0.0-alpha.beta") // .orderedAscending
compareVersions("1.0.0-alpha.beta", "1.0.0-beta") // .orderedAscending
compareVersions("1.0.0-beta", "1.0.0-beta.2") // .orderedAscending
compareVersions("1.0.0-beta.2", "1.0.0-beta.11") // .orderedAscending
compareVersions("1.0.0-beta.11", "1.0.0-rc.1") // .orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0") // .orderedDescending
``` // XCTAssertTrue failed