Metadata
| Key | Value |
|---|---|
| engine | mlx |
| prompt | default |
| temp | 0.2 |
| top_p | 0.95 |
| max_new_tokens | 1024 |
| n_completions | 10 |
Solutions
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```guard let json = json as? else { // expected type after 'as'guard let json = json as? else { // expected 'else' after 'guard' conditiontypealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} catch {
throw ParsingError.internalError(error)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
JSON parser, returns custom error type in case of failures.
Answer:
```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
guard let json = json as? [String: Any] else {
throw ParsingError.invalidInput
}
return json
} 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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}
let tree = HTMLNode.element("div", children: [
HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
HTMLNode.text("ifteval")
])
])
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}
let tree: HTMLNode =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("ifteval")
])
])
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}
let tree =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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 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
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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
}
}
let tree =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}
let tree: HTMLNode =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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 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
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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
}
}
let tree: HTMLNode =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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 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
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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
}
}
let tree =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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
}
}
let tree =.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 let.text(content):
return content
case let.element(name, attributes, children):
var result = "<\(name)"
for (key, value) in attributes {
result.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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.append(" \(key)=\"\(value)\"")
}
result.append(">")
for child in children {
result.append(generate(child))
}
result.append("</\(name)>")
return result
}
}
let tree =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval")
])
])
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 let.text(content):
return content
case let.element(name, attributes, children):
var html = "<\(name)"
for (key, value) in attributes {
html += " \(key)=\"\(value)\""
}
html += ">"
for child in children {
html += generate(child)
}
html += "</\(name)>"
return html
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
HTML generator from predefined elements tree.
Output with standart HTML like this "<div><a href="swifteval"></a></div>"
Answer:
```swift
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 html = "<\(name)"
for (key, value) in attributes {
html += " \(key)=\"\(value)\""
}
html += ">"
for child in children {
html += generate(child)
}
html += "</\(name)>"
return html
}
}
let tree =.element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Ifteval") ])
])
print(generate(tree))
```enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "+":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "-":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b - a)
} else {
throw CalculateError.invalidInput
}
case "*":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b * a)
} else {
throw CalculateError.invalidInput
}
case "/":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b / a)
} else {
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "+":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "-":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b - a)
} else {
throw CalculateError.invalidInput
}
case "*":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b * a)
} else {
throw CalculateError.invalidInput
}
case "/":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b / a)
} else {
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}
```if let result = stack.popLast() { // cannot find 'stack' in scopereturn result // return invalid outside of a func} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(first + second)
} else {
stack.append(first)
}
case "+":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second + first)
} else {
stack.append(first)
}
case "-":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second - first)
} else {
stack.append(-first)
}
case "*":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second * first)
} else {
throw CalculateError.invalidInput
}
case "/":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second / first)
} else {
throw CalculateError.invalidInput
}
default:
if let value = Double(token) {
stack.append(value)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst()
return result?? 0
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(first + second)
} else {
stack.append(first)
}
case "+":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second + first)
} else {
stack.append(first)
}
case "-":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second - first)
} else {
stack.append(-first)
}
case "*":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second * first)
} else {
throw CalculateError.invalidInput
}
case "/":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
if let second = stack.popFirst() {
stack.append(second / first)
} else {
throw CalculateError.invalidInput
}
default:
if let value = Double(token) {
stack.append(value)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst()
return result?? 0
}
```guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentif let second = stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(first + second) // cannot convert value of type 'String' to expected argument type 'Double'guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentif let second = stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(second + first) // cannot convert value of type 'String' to expected argument type 'Double'guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentif let second = stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(second - first) // cannot convert value of type 'Duration' to expected argument type 'Double'stack.append(-first) // cannot convert value of type 'Float16' to expected argument type 'Double'guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentif let second = stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(second * first) // cannot convert value of type 'Duration' to expected argument type 'Double'guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentif let second = stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(second / first) // cannot convert value of type 'Duration' to expected argument type 'Double'guard let result = stack.popFirst() // cannot find 'stack' in scopeguard let result = stack.popFirst() // expected 'else' after 'guard' conditionreturn result?? 0 // return invalid outside of a funcreturn result?? 0 // integer literal is unusedreturn result?? 0 // consecutive statements on a line must be separated by ';'} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "+":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "-":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first - value)
} else {
stack.append(-value)
}
} else {
throw CalculateError.invalidInput
}
case "*":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first * value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "/":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first / value)
} else {
throw CalculateError.invalidInput
}
} else {
CalculateError.invalidInput
}
default:
if let value = Double(token)?? {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "+":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "-":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first - value)
} else {
stack.append(-value)
}
} else {
throw CalculateError.invalidInput
}
case "*":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first * value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "/":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first / value)
} else {
throw CalculateError.invalidInput
}
} else {
CalculateError.invalidInput
}
default:
if let value = Double(token)?? {
throw CalculateError.invalidInput
}
stack.append(value)
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}
```CalculateError.invalidInput // result of call to function returning 'CalculateError' is unusedif let value = Double(token)?? { // cannot use optional chaining on non-optional value of type 'Double'stack.append(value) // cannot find 'value' in scopeenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "+":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "-":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b - a)
} else {
throw CalculateError.invalidInput
}
case "*":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b * a)
} else {
throw CalculateError.invalidInput
}
case "/":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b / a)
} else {
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "+":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b + a)
} else {
throw CalculateError.invalidInput
}
case "-":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b - a)
} else {
throw CalculateError.invalidInput
}
case "*":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b * a)
} else {
throw CalculateError.invalidInput
}
case "/":
if let a = stack.popLast(), let b = stack.popLast() {
stack.append(b / a)
} else {
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}
```if let result = stack.popLast() { // cannot find 'stack' in scopereturn result // return invalid outside of a func} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: CharacterSet(charactersIn: "()+-*/"))
var stack = [Double]()
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else if let operation = token.first {
switch operation {
case "(":
stack.append(0)
case ")":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast()
return result?? 0
}
func calculate(_ left: Double, _ right: Double, _ operation: Character) throws -> Double {
switch operation {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return left / right
default:
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: CharacterSet(charactersIn: "()+-*/"))
var stack = [Double]()
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else if let operation = token.first {
switch operation {
case "(":
stack.append(0)
case ")":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "+":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "-":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "*":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
case "/":
guard let right = stack.popLast(), let left = stack.popLast() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(left, right, operation)
stack.append(result)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast()
return result?? 0
}
func calculate(_ left: Double, _ right: Double, _ operation: Character) throws -> Double {
switch operation {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return left / right
default:
throw CalculateError.invalidInput
}
}
```switch operation { // switch must be exhaustivelet result = try calculate(String(left, right, operation) // expected ',' separatorlet result = try calculate(String(left, right, operation) // missing argument labels 'format:locale:arguments:' in callstack.append(result) // extra argument in callstack.append(result) // use of local variable 'result' before its declarationguard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // expected expressionguard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // 'let' cannot appear nested inside another 'var' or 'let' patternguard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'left'guard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'right'let result = try calculate(String(left, right, operation) // expected ',' separatorlet result = try calculate(String(left, right, operation) // no exact matches in call to initializerstack.append(result) // extra argument in callguard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'left'guard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // expected expressionguard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'right'guard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // 'let' cannot appear nested inside another 'var' or 'let' patternlet result = try calculate(String(left, right, operation) // expected ',' separatorlet result = try calculate(String(left, right, operation) // no exact matches in call to initializerstack.append(result) // extra argument in callguard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // expected expressionguard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // 'let' cannot appear nested inside another 'var' or 'let' patternguard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'left'guard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'right'let result = try calculate(String(left, right, operation) // no exact matches in call to initializerlet result = try calculate(String(left, right, operation) // expected ',' separatorstack.append(result) // extra argument in callguard let right = stack.popLast(), let left = stack.popLast() else { // 'let' cannot appear nested inside another 'var' or 'let' patternguard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'right'guard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // consecutive statements on a line must be separated by ';'guard let right = stack.popLast(), let left = stack.popLast() else { // invalid redeclaration of 'left'guard let right = stack.popLast(), let left = stack.popLast() else { // expected expressionlet result = try calculate(String(left, right, operation) // no exact matches in call to initializerlet result = try calculate(String(left, right, operation) // expected ',' separatorstack.append(result) // extra argument in callguard let result = stack.popLast() // expected 'else' after 'guard' conditionreturn result?? 0 // integer literal is unusedreturn result?? 0 // consecutive statements on a line must be separated by ';'return result?? 0 // cannot use optional chaining on non-optional value of type 'Double'return result?? 0 // cannot use optional chaining on non-optional value of type 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if stack.count < 2 {
throw CalculateError.invalidInput
}
let right = stack.removeLast()
let left = stack.removeLast()
let operation = stack.removeLast()
switch operation {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
case "+":
stack.append("+")
case "-":
stack.append("-")
case "*":
stack.append("*")
case "/":
stack.append("/")
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if stack.count!= [4] {
throw CalculateError.invalidInput
}
return stack.removeLast()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if stack.count < 2 {
throw CalculateError.invalidInput
}
let right = stack.removeLast()
let left = stack.removeLast()
let operation = stack.removeLast()
switch operation {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
case "+":
stack.append("+")
case "-":
stack.append("-")
case "*":
stack.append("*")
case "/":
stack.append("/")
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
if stack.count!= [4] {
throw CalculateError.invalidInput
}
return stack.removeLast()
}
```case "+": // expression pattern of type 'String' cannot match values of type 'Double'case "-": // expression pattern of type 'String' cannot match values of type 'Double'case "*": // expression pattern of type 'String' cannot match values of type 'Double'case "/": // expression pattern of type 'String' cannot match values of type 'Double'stack.append("+") // cannot convert value of type 'String' to expected argument type 'Double'stack.append("-") // cannot convert value of type 'String' to expected argument type 'Double'stack.append("*") // cannot convert value of type 'String' to expected argument type 'Double'stack.append("/") // cannot convert value of type 'String' to expected argument type 'Double'if stack.count!= [4] { // '=' must have consistent whitespace on both sidesif stack.count!= [4] { // cannot find 'stack' in scopeif stack.count!= [4] { // use of '=' in a boolean context, did you mean '=='?return stack.removeLast() // return invalid outside of a func} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int:
stack.append(first + value)
case let first as Double: stack.append(first + value)
default:
throw CalculateError.invalidInput
}
case let value as String:
if let intValue = Int(value) {
stack.append(Double(intValue))
} else if let doubleValue = Double(value) {
stack.append(doubleValue)
} else {
throw CalculateError.invalidInput
}
case "+":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first + value)
case let first as Double: stack.append(first + value)
default:
throw CalculateError.invalidInput
}
case "-":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first - value)
case let first as Double: stack.append(first - value)
default:
throw CalculateError.invalidInput
}
case "*":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first * value)
case let first as Double: stack.append(first * value)
default:
throw CalculateError.invalidInput
}
case "/":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first / value)
case let first as Double: stack.append(first / value)
default:
throw CalculateError.invalidInput
}
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast()
return result?? 0
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int:
stack.append(first + value)
case let first as Double: stack.append(first + value)
default:
throw CalculateError.invalidInput
}
case let value as String:
if let intValue = Int(value) {
stack.append(Double(intValue))
} else if let doubleValue = Double(value) {
stack.append(doubleValue)
} else {
throw CalculateError.invalidInput
}
case "+":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first + value)
case let first as Double: stack.append(first + value)
default:
throw CalculateError.invalidInput
}
case "-":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first - value)
case let first as Double: stack.append(first - value)
default:
throw CalculateError.invalidInput
}
case "*":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first * value)
case let first as Double: stack.append(first * value)
default:
throw CalculateError.invalidInput
}
case "/":
guard let value = stack.popLast() else {
throw CalculateError.invalidInput
}
guard let first = stack.popLast() else {
throw CalculateError.invalidInput
}
switch first {
case let first as Int: stack.append(first / value)
case let first as Double: stack.append(first / value)
default:
throw CalculateError.invalidInput
}
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast()
return result?? 0
}
```case let first as Int: // cast from 'Double' to unrelated type 'Int' always failsstack.append(first + value) // cannot convert value of type 'Int' to expected argument type 'Double'case let first as Double: stack.append(first + value) // 'as' test is always truecase let value as String: // 'as' test is always truecase let first as Int: stack.append(first + value) // cast from 'Double' to unrelated type 'Int' always failscase let first as Int: stack.append(first + value) // cannot convert value of type 'Int' to expected argument type 'Double'case let first as Double: stack.append(first + value) // 'as' test is always truecase let first as Int: stack.append(first - value) // cast from 'Double' to unrelated type 'Int' always failscase let first as Int: stack.append(first - value) // cannot convert value of type 'Int' to expected argument type 'Double'case let first as Double: stack.append(first - value) // 'as' test is always truecase let first as Int: stack.append(first * value) // cannot convert value of type 'Int' to expected argument type 'Double'case let first as Int: stack.append(first * value) // cast from 'Double' to unrelated type 'Int' always failscase let first as Double: stack.append(first * value) // 'as' test is always truecase let first as Int: stack.append(first / value) // cannot convert value of type 'Int' to expected argument type 'Double'case let first as Int: stack.append(first / value) // cast from 'Double' to unrelated type 'Int' always failscase let first as Double: stack.append(first / value) // 'as' test is always trueguard let result = stack.popLast() // cannot find 'stack' in scopeguard let result = stack.popLast() // expected 'else' after 'guard' conditionreturn result?? 0 // consecutive statements on a line must be separated by ';'return result?? 0 // return invalid outside of a funcreturn result?? 0 // integer literal is unused} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: CharacterSet(charactersIn: "()+-*/"))
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "+":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "-":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first - value)
} else {
stack.append(-value)
}
} else {
throw CalculateError.invalidInput
}
case "*":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first * value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "/":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first / value)
} else {
throw CalculateError.invalidInput
}
} else {
CalculateError.invalidInput
}
default:
if let doubleValue = Double(token) {
stack.append(value)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: CharacterSet(charactersIn: "()+-*/"))
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "+":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first + value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "-":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first - value)
} else {
stack.append(-value)
}
} else {
throw CalculateError.invalidInput
}
case "*":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first * value)
} else {
stack.append(value)
}
} else {
throw CalculateError.invalidInput
}
case "/":
if let value = stack.popLast() {
if let first = stack.popLast() {
stack.append(first / value)
} else {
throw CalculateError.invalidInput
}
} else {
CalculateError.invalidInput
}
default:
if let doubleValue = Double(token) {
stack.append(value)
} else {
throw CalculateError.invalidInput
}
}
}
}
if let result = stack.popLast() {
return result
} else {
throw CalculateError.invalidInput
}
}
```CalculateError.invalidInput // result of call to function returning 'CalculateError' is unusedstack.append(value) // cannot find 'value' in scopeif let result = stack.popLast() { // cannot find 'stack' in scopereturn result // return invalid outside of a func} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
guard let second = stack.popFirst() else {
throw CalculateError.invalidInput
}
switch stack.popFirst() {
case "+":
stack.append(second + first)
case "-":
stack.append(second - first)
case "*":
stack.append(second * first)
case "/":
stack.append(second / first)
default:
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst() else {
throw CalculateError.invalidInput
}
return result
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
guard let second = stack.popFirst() else {
throw CalculateError.invalidInput
}
switch stack.popFirst() {
case "+":
stack.append(second + first)
case "-":
stack.append(second - first)
case "*":
stack.append(second * first)
case "/":
stack.append(second / first)
default:
throw CalculateError.invalidInput
}
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst() else {
throw CalculateError.invalidInput
}
return result
}
```guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentguard let second = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentswitch stack.popFirst() { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentstack.append(second + first) // cannot convert value of type 'String' to expected argument type 'Double'stack.append(second - first) // cannot convert value of type 'Duration' to expected argument type 'Double'stack.append(second * first) // cannot convert value of type 'Duration' to expected argument type 'Double'stack.append(second / first) // cannot convert value of type 'Duration' to expected argument type 'Double'guard let result = stack.popFirst() else { // cannot find 'stack' in scopereturn result // return invalid outside of a func} // extraneous '}' at top levelenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
guard let second = stack.popFirst() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(second, token, first))
stack.append(result)
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ first: Double, _ token: String, _ second: Double) throws -> Double {
switch token {
case "+":
return first + second
case "-":
return first - second
case "*":
return first * second
case "/":
return first / second
default:
throw CalculateError.invalidInput
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Calculator which supports operations from readable string format.
Valid tokens is "+-*/()", example input is "2+2*2".
Answer:
```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy: " ")
var stack = [Double]()
for token in tokens {
switch token {
case "(":
stack.append(0)
case ")":
guard let first = stack.popFirst() else {
throw CalculateError.invalidInput
}
guard let second = stack.popFirst() else {
throw CalculateError.invalidInput
}
let result = try calculate(String(second, token, first))
stack.append(result)
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
}
guard let result = stack.popFirst() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ first: Double, _ token: String, _ second: Double) throws -> Double {
switch token {
case "+":
return first + second
case "-":
return first - second
case "*":
return first * second
case "/":
return first / second
default:
throw CalculateError.invalidInput
}
}
```guard let first = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentguard let second = stack.popFirst() else { // referencing instance method 'popFirst()' on 'Collection' requires the types '[Double]' and 'Array<Double>.SubSequence' (aka 'ArraySlice<Double>') be equivalentlet result = try calculate(String(second, token, first)) // no exact matches in call to initializerguard let result = stack.popFirst() else { // cannot find 'stack' in scopereturn result // return invalid outside of a func} // extraneous '}' at top levelfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile() // value of type 'Any?' has no member 'fileHandleForReading'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile() // value of type 'Any?' has no member 'fileHandleForReading'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```let errorData = task.standardError.fileHandleForReading.readDataToEndOfFile() // value of type 'Any?' has no member 'fileHandleForReading'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let output = Pipe()
let error =PIPE()
task.standardOutput = output
task.standardError = error
task.launch()
task.waitUntilExit()
let outputData = output.fileHandleForReading.readDataToEndOfFile()
let outputString = String(data: outputData, encoding:.utf8)!
let errorData = error.fileHandleForReading.readDataToEndOfFile()
let errorString = String(data: errorData, encoding:.utf8)!
return (outputString, errorString)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let output = Pipe()
let error =PIPE()
task.standardOutput = output
task.standardError = error
task.launch()
task.waitUntilExit()
let outputData = output.fileHandleForReading.readDataToEndOfFile()
let outputString = String(data: outputData, encoding:.utf8)!
let errorData = error.fileHandleForReading.readDataToEndOfFile()
let errorString = String(data: errorData, encoding:.utf8)!
return (outputString, errorString)
}
```let error =PIPE() // '=' must have consistent whitespace on both sideslet error =PIPE() // cannot find 'PIPE' in scopefunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
task.waitUntilExit()
let output = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: errorPipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
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()
task.waitUntilExit()
let output = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: errorPipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
task.waitUntilExit()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
task.waitUntilExit()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
task.waitUntilExit()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
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()
task.waitUntilExit()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let output = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
let errorOutput = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
return (output, errorOutput)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let output = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
let errorOutput = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding:.utf8)!
return (output, errorOutput)
}
``` // 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()
task.waitUntilExit()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Function to execute binary with arguments.
Returns tuple where first element is stdout and second is stderr.
Answer:
```swift
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()
task.waitUntilExit()
let outputData = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding:.utf8)!
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let cached = cache[input] {
return cached
} else {
let result = function(input)
cache[input] = result
return result
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let cached = cache[input] {
return cached
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let cached = cache[input] {
return cached
} else {
let result = function(input)
cache[input] = result
return result
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let cached = cache[input] {
return cached
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Memoization function that caches the results of expensive computations.
Answer:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cachedValue = cache[argument] {
return cachedValue
} else {
let newValue = function(argument)
cache[argument] = newValue
return newValue
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}
```throw Error() // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}
```throw Error("Task failed after \(attempts) attempts") // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}
```throw Error("Task failed after \(attempts) attempts") // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}
```throw Error() // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}
```throw Error("Task failed after \(attempts) attempts") // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}
```throw Error() // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}
```throw Error("Task failed after \(attempts) attempts") // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error("Task failed after \(attempts) attempts")
}
```throw Error("Task failed after \(attempts) attempts") // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}
```throw Error() // 'any Error' cannot be constructed because it has no accessible initializersfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Retry mechanism that retries a task a specified number of times before failing.
Answer:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attemptsRemaining = attempts
repeat {
attemptsRemaining -= 1
return try task()
} while attemptsRemaining > 0
throw Error()
}
```throw Error() // 'any Error' cannot be constructed because it has no accessible initializersprotocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
if let factory = registrations[typeString] as? {
return factory() as?() as? T
}
return nil
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
if let factory = registrations[typeString] as? {
return factory() as?() as? T
}
return nil
}
}
```if let factory = registrations[typeString] as? { // expected type after 'as'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: T.self)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: T.self)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: T.self)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: T.self)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
registrations[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = registrations[key] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple dependency injection (DI) container.
Answer:
```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [String: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let typeString = String(describing: type)
registrations[typeString] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let typeString = String(describing: type)
guard let factory = registrations[typeString] else { return nil }
return factory() as?() as? T
}
}
``` // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, World!"))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, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: [Event: State]] = [:] // expected ']' in array typeprotocol 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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'transitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'transitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'transitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'transitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'transitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: [Event: State]] = [:] // expected ']' in array typeprotocol 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, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: State]] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: State]] = [] // type 'State' does not conform to protocol 'Hashable'if let nextState = transitions[currentState]?[event] { // cannot use optional chaining on non-optional value of type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')if let nextState = transitions[currentState]?[event] { // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'if let nextState = transitions[currentState]?[event] { // no exact matches in call to subscriptif transitions[from] == nil { // no exact matches in call to subscripttransitions[from] = [:] // no exact matches in call to subscripttransitions[from]![event] = to // cannot force unwrap value of non-optional type 'Array<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'Event' conform to 'RangeExpression'transitions[from]![event] = to // cannot assign value of type 'State' to subscript of type 'ArraySlice<[State : State]>.SubSequence' (aka 'ArraySlice<Dictionary<State, State>>')transitions[from]![event] = to // subscript 'subscript(_:)' requires that 'State' conform to 'RangeExpression'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, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState]?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]![event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: [Event: State]] = [:] // expected ']' in array typeprotocol 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, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Finite state machine with possibility to register custom transitions between states.
Answer:
```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)
}
class StateMachine<State, Event>: StateMachineProtocol {
private var transitions: [[State: [Event: State]] = [:]
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[currentState?[event] {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```class StateMachine<State, Event>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[State: [Event: State]] = [:] // expected ']' in array typeif let nextState = transitions[currentState?[event] { // cannot use optional chaining on non-optional value of type 'State'if let nextState = transitions[currentState?[event] { // value of type 'State' has no subscriptscurrentState = nextState // cannot find 'nextState' in scope} // expected '{' after 'if' condition} // expected ']' in expression listindirect 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()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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()!
}
}
}
``` // 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 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 let.file(_, size):
return size
case let.directory(_, contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 0
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 let.file(_, size):
return size
case let.directory(_, contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
``` // 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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```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 }
}
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 0
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
let root = FileSystemNode.directory(name: "root", contents: [
.file(name: "file1", size: 1000),
.file(name: "file2", size: 200),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 4000),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 5000),
.file(name: "file6", size: 6000)
])
])
])
])
print(root.totalSize) // 2500
print(root.filesCount) // 6
print(root.treeDepth) // 3
``` // Fatal error: Unexpectedly found nil while unwrapping an Optional valueprotocol 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()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
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()
}
}
```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()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```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 elements: [Element] = []
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic stack with push and pop functions.
Answer:
```swift
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()
}
}
```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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandsprotocol 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, Date)] = [:]
private var capacity: Int
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
accessOrder.append(key)
return value
}
return nil
}
set {
if let value = newValue {
if cache.count >= capacity {
let leastRecentlyUsedKey = accessOrder.removeFirst()
cache.removeValue(forKey: leastRecentlyUsedKey)
}
cache[key] = (value, Date())
accessOrder.append(key)
} else {
cache.removeValue(forKey: key)
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Date)] = [:]
private var capacity: Int
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
accessOrder.append(key)
return value
}
return nil
}
set {
if let value = newValue {
if cache.count >= capacity {
let leastRecentlyUsedKey = accessOrder.removeFirst()
cache.removeValue(forKey: leastRecentlyUsedKey)
}
cache[key] = (value, Date())
accessOrder.append(key)
} else {
cache.removeValue(forKey: key)
accessOrder.remove(at: accessOrder.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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandsprotocol 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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.key] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandscache[leastRecentlyUsed?.key] = nil // type of expression is ambiguous without a type annotationprotocol 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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed.key] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandsprotocol 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, Date)]()
private var capacity: Int
private var accessOrder = [Key]()
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(key)
accessOrder.append(key)
return value
}
return nil
}
set {
if let existingValue = cache[key] {
cache[key] = (newValue, Date())
accessOrder.remove(key)
accessOrder.append(key)
} else {
if cache.count >= capacity {
cache.remove(at: 0)
}
cache[key] = (newValue, Date())
accessOrder.append(key)
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Date)]()
private var capacity: Int
private var accessOrder = [Key]()
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(key)
accessOrder.append(key)
return value
}
return nil
}
set {
if let existingValue = cache[key] {
cache[key] = (newValue, Date())
accessOrder.remove(key)
accessOrder.append(key)
} else {
if cache.count >= capacity {
cache.remove(at: 0)
}
cache[key] = (newValue, Date())
accessOrder.append(key)
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'accessOrder.remove(key) // no exact matches in call to instance method 'remove'cache[key] = (newValue, Date()) // cannot assign value of type '(Element?, Date)' to subscript of type '(Element, Date)'accessOrder.remove(key) // no exact matches in call to instance method 'remove'cache.remove(at: 0) // cannot convert value of type 'Int' to expected argument type 'Dictionary<Key, (Element, Date)>.Index'cache[key] = (newValue, Date()) // cannot assign value of type '(Element?, Date)' to subscript of type '(Element, Date)'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, Date)] = [:]
private var capacity: Int
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
accessOrder.append(key)
return value
}
return nil
}
set {
if let existingValue = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
cache[key] = (newValue, Date())
accessOrder.append(key)
} else {
if cache.count >= capacity {
let leastRecentlyUsedKey = accessOrder.removeFirst! cache.removeValue(forKey: leastRecentlyUsedKey) }
cache[key] = (newValue, Date())
accessOrder.append(key)
}
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Date)] = [:]
private var capacity: Int
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
accessOrder.append(key)
return value
}
return nil
}
set {
if let existingValue = cache[key] {
accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
cache[key] = (newValue, Date())
accessOrder.append(key)
} else {
if cache.count >= capacity {
let leastRecentlyUsedKey = accessOrder.removeFirst! cache.removeValue(forKey: leastRecentlyUsedKey) }
cache[key] = (newValue, Date())
accessOrder.append(key)
}
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'cache[key] = (newValue, Date()) // cannot assign value of type '(Element?, Date)' to subscript of type '(Element, Date)'let leastRecentlyUsedKey = accessOrder.removeFirst! cache.removeValue(forKey: leastRecentlyUsedKey) } // consecutive statements on a line must be separated by ';'let leastRecentlyUsedKey = accessOrder.removeFirst! cache.removeValue(forKey: leastRecentlyUsedKey) } // no exact matches in reference to instance method 'removeFirst'cache[key] = (newValue, Date()) // cannot assign value of type '(Element?, Date)' to subscript of type '(Element, Date)'} // extraneous '}' at top levelprotocol 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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
} else {
cache[key] = nil
}
removeLeastRecentlyUsedItemIfNecessary()
}
}
private func removeLeastRecentlyUsedItemIfNecessary() {
if cache.count > capacity {
let leastRecentlyUsedKey = cache.min { $0.1 < $1.1 }?.key
cache[leastRecentlyUsedKey] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
} else {
cache[key] = nil
}
removeLeastRecentlyUsedItemIfNecessary()
}
}
private func removeLeastRecentlyUsedItemIfNecessary() {
if cache.count > capacity {
let leastRecentlyUsedKey = cache.min { $0.1 < $1.1 }?.key
cache[leastRecentlyUsedKey] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsedKey = cache.min { $0.1 < $1.1 }?.key // binary operator '<' cannot be applied to two '(Element, Double)' operandsprotocol 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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.0] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.0] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandscache[leastRecentlyUsed?.0] = nil // type of expression is ambiguous without a type annotationprotocol 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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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, Double)] = [:]
private var capacity: Int
private var timestamp: Double = 0
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let (value, _) = cache[key] {
return value
}
return nil
}
set {
if let value = newValue {
cache[key] = (value, timestamp)
timestamp += 1
removeLeastRecentlyUsed()
} else {
cache[key] = nil
}
}
}
private func removeLeastRecentlyUsed() {
if cache.count > capacity {
let leastRecentlyUsed = cache.min { $0.1 < $1.1 }
cache[leastRecentlyUsed?.key] = nil
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'let leastRecentlyUsed = cache.min { $0.1 < $1.1 } // binary operator '<' cannot be applied to two '(Element, Double)' operandscache[leastRecentlyUsed?.key] = nil // type of expression is ambiguous without a type annotationprotocol 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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.evictExpired()
}
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
} else {
cache[key] = nil
return nil
}
}
private func evictExpired() {
for (key, (value, expiration)) in cache where expiration < Date().timeIntervalSince1970 {
cache[key] = nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.evictExpired()
}
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
} else {
cache[key] = nil
return nil
}
}
private func evictExpired() {
for (key, (value, expiration)) in cache where expiration < Date().timeIntervalSince1970 {
cache[key] = nil
}
}
}
```if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 { // value of type 'Date' has no member 'timeIntervalSince19970'for (key, (value, expiration)) in cache where expiration < Date().timeIntervalSince1970 { // immutable value 'value' was never used; consider replacing with '_' or removing itThread.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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else { return nil }
if expiration > Date() { return value }
cache[key] = nil
return nil
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else { return nil }
if expiration > Date() { return value }
cache[key] = nil
return nil
}
}
```if expiration > Date() { return value } // cannot find 'expiration' in scopeThread.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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince19970 + expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.evictExpired()
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], Date().timeIntervalSince19970 < expiration {
return value
} else {
cache[key] = nil
return nil
}
}
private func evictExpired() {
cache = cache.filter { _, expiration in
Date().timeIntervalSince1970 < expiration
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince19970 + expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.evictExpired()
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], Date().timeIntervalSince19970 < expiration {
return value
} else {
cache[key] = nil
return nil
}
}
private func evictExpired() {
cache = cache.filter { _, expiration in
Date().timeIntervalSince1970 < expiration
}
}
}
```cache[key] = (value, Date().timeIntervalSince19970 + expiration) // value of type 'Date' has no member 'timeIntervalSince19970'if let (value, expiration) = cache[key], Date().timeIntervalSince19970 < expiration { // value of type 'Date' has no member 'timeIntervalSince19970'Date().timeIntervalSince1970 < expiration // cannot convert value of type '(value: Value, expiration: TimeInterval)' (aka '(value: Value, expiration: Double)') to expected argument type 'TimeInterval' (aka 'Double')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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.cache.cache.remove(key: key)
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if Date().timeIntervalSince19970 < expiration {
return value
} else {
cache.remove(key: key)
return nil
}
}
return nil
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.cache.cache.remove(key: key)
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if Date().timeIntervalSince19970 < expiration {
return value
} else {
cache.remove(key: key)
return nil
}
}
return nil
}
}
```self?.cache.cache.remove(key: key) // value of type '[Key : (value: Value, expiration: TimeInterval)]' (aka 'Dictionary<Key, (value: Value, expiration: Double)>') has no member 'cache'if Date().timeIntervalSince19970 < expiration { // value of type 'Date' has no member 'timeIntervalSince19970'cache.remove(key: key) // incorrect argument label in call (have 'key:', expected 'at:')cache.remove(key: key) // cannot convert value of type 'Key' to expected argument type 'Dictionary<Key, (value: Value, expiration: TimeInterval)>.Index' (aka 'Dictionary<Key, (value: Value, expiration: Double)>.Index')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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince19970 + expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.evictExpired()
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
}
return nil
}
private func evictExpired() {
cache = cache.filter { $0.value.expiration > Date().timeIntervalSince19970 }
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince19970 + expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.evictExpired()
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
}
return nil
}
private func evictExpired() {
cache = cache.filter { $0.value.expiration > Date().timeIntervalSince19970 }
}
}
```cache[key] = (value, Date().timeIntervalSince19970 + expiration) // value of type 'Date' has no member 'timeIntervalSince19970'if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 { // value of type 'Date' has no member 'timeIntervalSince19970'cache = cache.filter { $0.value.expiration > Date().timeIntervalSince19970 } // value of type 'Date' has no member 'timeIntervalSince19970'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: TimeInterval)]()
private let queue = DispatchQueue(label: "com.expirablecache")
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date().timeIntervalSince19970 + expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
if let (value, expiration) = self.cache[key], Date().timeIntervalSince1970 < expiration {
return value
} else {
self.cache[key] = nil
return nil
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private let queue = DispatchQueue(label: "com.expirablecache")
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date().timeIntervalSince19970 + expiration)
}
}
func get(key: Key) -> Value? {
queue.sync {
if let (value, expiration) = self.cache[key], Date().timeIntervalSince1970 < expiration {
return value
} else {
self.cache[key] = nil
return nil
}
}
}
}
```self.cache[key] = (value, Date().timeIntervalSince19970 + expiration) // value of type 'Date' has no member 'timeIntervalSince19970'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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.evictExpired()
}
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
}
return nil
}
private func evictExpired() {
cache = cache.filter { _, expiration in
return expiration > Date().timeIntervalSince1970
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.evictExpired()
}
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 {
return value
}
return nil
}
private func evictExpired() {
cache = cache.filter { _, expiration in
return expiration > Date().timeIntervalSince1970
}
}
}
```if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince19970 { // value of type 'Date' has no member 'timeIntervalSince19970'return expiration > Date().timeIntervalSince1970 // cannot convert value of type '(value: Value, expiration: TimeInterval)' (aka '(value: Value, expiration: Double)') to expected argument type 'TimeInterval' (aka 'Double')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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.cache.cache.remove(key: key)
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince19970 {
return value
} else {
cache.remove(key: key)
return nil
}
}
return nil
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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: TimeInterval)]()
private var timer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false) { [weak self] _ in
self?.cache.cache.remove(key: key)
}
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince19970 {
return value
} else {
cache.remove(key: key)
return nil
}
}
return nil
}
}
```self?.cache.cache.remove(key: key) // value of type '[Key : (value: Value, expiration: TimeInterval)]' (aka 'Dictionary<Key, (value: Value, expiration: Double)>') has no member 'cache'if expiration > Date().timeIntervalSince19970 { // value of type 'Date' has no member 'timeIntervalSince19970'cache.remove(key: key) // incorrect argument label in call (have 'key:', expected 'at:')cache.remove(key: key) // cannot convert value of type 'Key' to expected argument type 'Dictionary<Key, (value: Value, expiration: TimeInterval)>.Index' (aka 'Dictionary<Key, (value: Value, expiration: Double)>.Index')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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache[key] = nil
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 300)
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache[key] = nil
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 300)
}
}
}
}
```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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache[key] = nil
return nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Caching mechanism with expiration eviction policy.
Subscript methods used for convenient access.
Answer:
```swift
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) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache[key] = nil
return 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 EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(with: keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(with: keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(with: Data) -> Data {
var result = Data(repeating: 0, count: count)
for i in 0..<count {
result[i] = self[i] ^ with[i]
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(with: keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(with: keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(with: Data) -> Data {
var result = Data(repeating: 0, count: count)
for i in 0..<count {
result[i] = self[i] ^ with[i]
}
return result
}
}
```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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)
}
return decryptedString
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)
}
return decryptedString
}
}
```decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!) // expected expressiondecryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!) // cannot force unwrap value of non-optional type 'Character'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!) // cannot force unwrap value of non-optional type '()'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!) // consecutive statements on a line must be separated by ';'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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(_ data: Data) -> Data {
var result = Data(count: self.count)
for i in 0..<self.count {
result[i] = self[i] ^ data[i]
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(_ data: Data) -> Data {
var result = Data(count: self.count)
for i in 0..<self.count {
result[i] = self[i] ^ data[i]
}
return result
}
}
```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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}
```decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type '()'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // expected expressiondecryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // consecutive statements on a line must be separated by ';'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type 'Character'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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}
```decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type '()'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // expected expressiondecryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // consecutive statements on a line must be separated by ';'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type 'Character'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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!)
}
return decryptedString
}
}
```decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type '()'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // expected expressiondecryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // consecutive statements on a line must be separated by ';'decryptedString.append(Character(UnicodeScalar(Int(data[i] ^ keyData[i % keyData.count]))!)!)!)!) // cannot force unwrap value of non-optional type 'Character'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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
Answer:
```swift
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)!
var encryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
encryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(repeating: 0x00, count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeElapsed = currentTime - lastRequestTime
if timeElapsed >= timeInterval {
lastRequestTime = currentTime
return true
} else if maxRequests > 0 {
let remainingRequests = maxRequests - Int(timeElapsed / timeInterval)
return remainingRequests > 0
}
return false
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeElapsed = currentTime - lastRequestTime
if timeElapsed >= timeInterval {
lastRequestTime = currentTime
return true
} else if maxRequests > 0 {
let remainingRequests = maxRequests - Int(timeElapsed / timeInterval)
return remainingRequests > 0
}
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
return true
} else {
return false
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
return true
}
return false
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) < timeInterval {
return false
}
lastRequestTime = currentTime
return true
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) < timeInterval {
return false
}
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
return true
} else {
return false
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
return true
} else {
return false
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
if (currentTime - lastRequestTime) >= timeInterval {
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
return true
}
return false
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeSinceLastRequest < timeInterval, maxRequests > 0 {
lastRequestTime = currentTime
maxRequests -= 1
return true
} else {
return false
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeSinceLastRequest < timeInterval, maxRequests > 0 {
lastRequestTime = currentTime
maxRequests -= 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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'maxRequests -= 1 // left side of mutating operator isn't mutable: 'maxRequests' is a 'let' constantThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeElapsed = currentTime - lastRequestTime
if timeElapsed >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeElapsed < timeInterval, maxRequests > 0 {
maxRequests -= 1
return true
}
return false
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeElapsed = currentTime - lastRequestTime
if timeElapsed >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeElapsed < timeInterval, maxRequests > 0 {
maxRequests -= 1
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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'maxRequests -= 1 // left side of mutating operator isn't mutable: 'maxRequests' is a 'let' constantThread.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 {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeSinceLastRequest < timeInterval, maxRequests > 0 {
lastRequestTime = currentTime
maxRequests -= 1
return true
} else {
return false
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var lastRequestTime: TimeInterval = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date().timeIntervalSince19970
let timeSinceLastRequest = currentTime - lastRequestTime
if timeSinceLastRequest >= timeInterval {
lastRequestTime = currentTime
return true
} else if timeSinceLastRequest < timeInterval, maxRequests > 0 {
lastRequestTime = currentTime
maxRequests -= 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'let currentTime = Date().timeIntervalSince19970 // value of type 'Date' has no member 'timeIntervalSince19970'maxRequests -= 1 // left side of mutating operator isn't mutable: 'maxRequests' is a 'let' constantThread.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 _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async(flags:.barrier) {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async(flags:.barrier) {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'_value += 1 // reference to property '_value' in closure requires explicit use of 'self' to make capture semantics explicitprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async(flags:.barrier) {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async(flags:.barrier) {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'_value += 1 // reference to property '_value' in closure requires explicit use of 'self' to make capture semantics explicitprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter", attributes:.concurrent)
init(value: Int) {
_value = value
}
func increment() {
queue.async {
_value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = _value
}
return result
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'_value += 1 // reference to property '_value' in closure requires explicit use of 'self' to make capture semantics explicitprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int = 0) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int = 0) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```init(value: Int = 0) { // 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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var result: Int = 0
queue.sync {
result = self._value
}
return result
}
}
```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 queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int = 0) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var value: Int = 0
queue.sync {
value = self._value
}
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Basic number counter with possibility to increment counter and access current value.
Thread-safe for read and write operations.
Answer:
```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var _value: Int
private let queue = DispatchQueue(label: "com.threadsafecounter.queue")
init(value: Int = 0) {
_value = value
}
func increment() {
queue.async {
self._value += 1
}
}
func currentValue() -> Int {
var value: Int = 0
queue.sync {
value = self._value
}
return value
}
}
```init(value: Int = 0) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument 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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument 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: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument 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 {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'T'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'T'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'T'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument 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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
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
let value: T
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T {
return value
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument 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>: PipelineProtocol {
let value: T.Output
init(value: T.Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T.Output) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T.Output {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T: PipelineProtocol>: PipelineProtocol {
let value: T.Output
init(value: T.Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T.Output) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T.Output {
return value
}
}
```init(value: T.Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'T.Output'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'let received = Pipeline(value: "Hello!") // generic parameter 'T' could not be inferredprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T: PipelineProtocol>: PipelineProtocol {
let value: T.Output
init(value: T.Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T.Output) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T.Output {
return value
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
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.
Answer:
```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T: PipelineProtocol>: PipelineProtocol {
let value: T.Output
init(value: T.Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T.Output) -> U) -> Pipeline<U> {
return Pipeline(value: transform(value))
}
func execute() -> T.Output {
return value
}
}
```init(value: T.Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'T.Output'return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'let received = Pipeline(value: "Hello!") // generic parameter 'T' could not be inferredprotocol 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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = newValue
notifyObservers(newValue)
}
}
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(_ newValue: Value) {
for observer in observers.values {
observer(newValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = newValue
notifyObservers(newValue)
}
}
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(_ newValue: Value) {
for observer in observers.values {
observer(newValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
self.currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get {
return currentValue
}
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get {
return currentValue
}
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Generic observable property that notifies observers of value changes.
Answer:
```swift
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 currentValue: Value
init(value: Value) {
currentValue = value
}
var value: Value {
get { return currentValue }
set {
currentValue = 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.values {
observer(currentValue)
}
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
let _range: ClosedRange<Value>
var wrappedValue: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self._range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
let _range: ClosedRange<Value>
var wrappedValue: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self._range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}
```self.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}
```self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // cannot infer contextual base in reference to member 'init'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // '=' must have consistent whitespace on both sidesself._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Value>' has no member '_wrappedValue'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Value' has no member 'clamped'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}
```self.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}
```self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // cannot infer contextual base in reference to member 'init'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // '=' must have consistent whitespace on both sidesself._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Value>' has no member '_wrappedValue'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Value' has no member 'clamped'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}
```self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // cannot infer contextual base in reference to member 'init'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // '=' must have consistent whitespace on both sidesself._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Value>' has no member '_wrappedValue'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Value' has no member 'clamped'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Double {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Float {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Int {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Double {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Float {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
extension Clamped where Value == Int {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range))
}
}
```self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Value' has no member 'clamped'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Value>' has no member '_wrappedValue'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // cannot find 'State' in scopeself._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Double>' has no member '_wrappedValue'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Double' has no member 'clamped'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // cannot find 'State' in scopeself._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // cannot find 'State' in scopeself._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Float>' has no member '_wrappedValue'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Float' has no member 'clamped'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Int>' has no member '_wrappedValue'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // value of type 'Int' has no member 'clamped'self._wrappedValue = State(initialValue: wrappedValue.clamped(to: range)) // cannot find 'State' in scopeprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}
```self.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}
```self.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range))
}
}
```self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // '=' must have consistent whitespace on both sidesself._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Value' has no member 'clamped'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // cannot infer contextual base in reference to member 'init'self._wrappedValue =.init(initialValue: wrappedValue.clamped(to: range)) // value of type 'Clamped<Value>' has no member '_wrappedValue'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
let _range: ClosedRange<Value>
var wrappedValue: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self._range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that clamps value within a specified range.
Answer:
```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
let _range: ClosedRange<Value>
var wrappedValue: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self._range = range
self.wrappedValue = range.clamp(wrappedValue)
}
}
```self.wrappedValue = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void = { event, value in
print("\(event): \(value)")
}) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void = { event, value in
print("\(event): \(value)")
}) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}
struct Example {
@Logged var x: Int
init(x: Int) { self.x = x }
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}
struct Example {
@Logged var x: Int
init(x: Int) { self.x = x }
}
var example = Example(x: 1)
example.x = 2
```init(x: Int) { self.x = x } // return from initializer without initializing all stored propertiesinit(x: Int) { self.x = x } // 'self' used before all stored properties are initializedenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var x: Int = 0 {
logger(.get, x)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet {
logger(.set, wrappedValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var x: Int = 0 {
logger(.get, x)
}
}
var example = Example()
example.x = 1
```@Logged var x: Int = 0 { // property wrapper cannot be applied to a computed property@Logged var x: Int = 0 { // missing argument for parameter 'logger' in property wrapper initializer; add 'wrappedValue' and 'logger' arguments in '@Logged(...)'@Logged var x: Int = 0 { // variable with getter/setter cannot have an initial valuelogger(.get, x) // cannot infer contextual base in reference to member 'get'logger(.get, x) // cannot find 'logger' in scopeenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) = { _, _ in }) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var wrapped = 0
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) = { _, _ in }) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var wrapped = 0
}
var example = Example()
example.wrapped = // <- this will log get
example.wrapped = <- this will log set
```init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) = { _, _ in }) { // expected declarationinit(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) = { _, _ in }) { // consecutive declarations on a line must be separated by ';'init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) = { _, _ in }) { // initializer requires a body@Logged var wrapped = 0 // missing argument for parameter 'logger' in property wrapper initializer; add 'wrappedValue' and 'logger' arguments in '@Logged(...)'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
}
extension Logged: Equatable where Value: Equatable {
static func == (lhs: Self, rhs: Self) -> Bool {
lhs.wrappedValue == rhs.wrappedValue
}
}
extension Logged: CustomReflectable {
var customReflect: CustomReflectable {
let value = wrappedValue
let children: [CustomReflectable] = []
return CustomReflect(value: value, children: children)
}
}
extension Logged: CustomPlaygroundDisplayConvertible {
var customPlaygroundQuickLook: CustomPlaygroundDisplayConvertible {
CustomPlaygroundDisplay(description: String(String(describing: wrappedValue))
}
}
extension Logged: CustomStringConvertible {
var description: String { String { String(describing: wrappedValue) }
}
extension Logged: CustomDebugStringConvertible where Value: CustomDebugStringConvertible {
var debugDescription: String {
"Logged(\(value: \(wrappedValue.debugDescription))"
}
}
extension Logged: CustomReflectable where Value: CustomReflectable {
var customReflect: CustomReflectable {
let value = wrappedValue.customReflect
let children: [CustomReflectable] = []
return CustomReflect(value: value, children: children)
}
}
extension Logged: CustomPlaygroundDisplayConvertible where Value: CustomPlaygroundDisplayConvertible {
var customPlaygroundLook: CustomPlaygroundConvertible {
CustomPlaygroundDisplay(description: String(String(describing: wrappedValue.customPlaygroundLook.description))
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
}
extension Logged: Equatable where Value: Equatable {
static func == (lhs: Self, rhs: Self) -> Bool {
lhs.wrappedValue == rhs.wrappedValue
}
}
extension Logged: CustomReflectable {
var customReflect: CustomReflectable {
let value = wrappedValue
let children: [CustomReflectable] = []
return CustomReflect(value: value, children: children)
}
}
extension Logged: CustomPlaygroundDisplayConvertible {
var customPlaygroundQuickLook: CustomPlaygroundDisplayConvertible {
CustomPlaygroundDisplay(description: String(String(describing: wrappedValue))
}
}
extension Logged: CustomStringConvertible {
var description: String { String { String(describing: wrappedValue) }
}
extension Logged: CustomDebugStringConvertible where Value: CustomDebugStringConvertible {
var debugDescription: String {
"Logged(\(value: \(wrappedValue.debugDescription))"
}
}
extension Logged: CustomReflectable where Value: CustomReflectable {
var customReflect: CustomReflectable {
let value = wrappedValue.customReflect
let children: [CustomReflectable] = []
return CustomReflect(value: value, children: children)
}
}
extension Logged: CustomPlaygroundDisplayConvertible where Value: CustomPlaygroundDisplayConvertible {
var customPlaygroundLook: CustomPlaygroundConvertible {
CustomPlaygroundDisplay(description: String(String(describing: wrappedValue.customPlaygroundLook.description))
}
}
```extension Logged: CustomReflectable { // type 'Logged<Value>' does not conform to protocol 'CustomReflectable'return CustomReflect(value: value, children: children) // cannot find 'CustomReflect' in scopeextension Logged: CustomPlaygroundDisplayConvertible { // type 'Logged<Value>' does not conform to protocol 'CustomPlaygroundDisplayConvertible'CustomPlaygroundDisplay(description: String(String(describing: wrappedValue)) // cannot find 'CustomPlaygroundDisplay' in scope} // expected ')' in expression listvar description: String { String { String(describing: wrappedValue) } // ambiguous use of 'init'extension Logged: CustomDebugStringConvertible where Value: CustomDebugStringConvertible { // declaration is only valid at file scope"Logged(\(value: \(wrappedValue.debugDescription))" // extraneous argument label 'value:' in call"Logged(\(value: \(wrappedValue.debugDescription))" // string interpolation can only appear inside a string literalextension Logged: CustomReflectable where Value: CustomReflectable { // declaration is only valid at file scopelet value = wrappedValue.customReflect // value of type 'Value' has no member 'customReflect'return CustomReflect(value: value, children: children) // cannot find 'CustomReflect' in scopeextension Logged: CustomPlaygroundDisplayConvertible where Value: CustomPlaygroundDisplayConvertible { // declaration is only valid at file scopevar customPlaygroundLook: CustomPlaygroundConvertible { // cannot find type 'CustomPlaygroundConvertible' in scope} // expected ')' in expression list@Logged(logger: logger) var value: Int = 0 // cannot convert value of type 'Int' to expected argument type 'Value'@Logged(logger: logger) var value: Int = 0 // cannot convert value of type '(Event, Int) -> Void' to expected argument type '(Event, Value) -> Void'@Logged(logger: logger) var value: Int = 0 // property type 'Int' does not match 'wrappedValue' type 'Value'try await test() // expected declarationenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Self {
Self(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
var log = [String]()
let logged = Logged(wrappedValue: 0) { event, value in
log.append("\(String(describing: event): \(value)")
}
logged += 1
logged += 2
logged += 3
print(log)
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void = { _, _ in }) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Logged<Value> {
Logged(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}
extension Logged: CustomReflectable {
var customMirror: Mirror {
Mirror(self, children: ["wrappedValue": wrappedValue])
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void = { _, _ in }) {
self.logger = logger
self.wrappedValue = wrappedValue
}
var projectedValue: Logged<Value> {
Logged(wrappedValue: wrappedValue, logger: logger)
}
mutating func modify(body: (inout Value) -> Void) {
logger(.set, wrappedValue)
body(&wrappedValue)
}
}
extension Logged: CustomReflectable {
var customMirror: Mirror {
Mirror(self, children: ["wrappedValue": wrappedValue])
}
}
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var x: Int
var logger: (Event, Int) -> Void = { event, value in
print("Event: \(event), Value: \(value)")
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Property wrapper that logs access and modification of the wrapped property.
Answer:
```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
let logger: (Event, Value) -> Void
var wrappedValue: Value {
didSet { logger(.set, wrappedValue) }
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self.wrappedValue = wrappedValue
}
}
struct Example {
@Logged var x: Int
var logger: (Event, Int) -> Void = { event, value in
print("Event: \(event), Value: \(value)")
}
}
var example = Example(x: 0)
example.logger(.get, example.x)
example.x = 1
example.logger(.get, example.x)
``` // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])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 searchString = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case let.keyboardCharacterSelect(character):
searchString.append(character)
return nil
case.keyboardDeleteBackspace:
searchString.removeLast()
return nil
case.searchButtonPress:
guard let city = searchString.nonEmpty else { return nil }
do {
let forecast = try provider.forecast(for: city)
return.success(city: city, forecast: forecast)
} catch {
return.failure(city: city)
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchString = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case let.keyboardCharacterSelect(character):
searchString.append(character)
return nil
case.keyboardDeleteBackspace:
searchString.removeLast()
return nil
case.searchButtonPress:
guard let city = searchString.nonEmpty else { return nil }
do {
let forecast = try provider.forecast(for: city)
return.success(city: city, forecast: forecast)
} catch {
return.failure(city: city)
}
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'guard let city = searchString.nonEmpty else { return nil } // value of type 'String' has no member 'nonEmpty'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardCharacterSelect(let character): // 'case' label in a 'switch' must have at least one executable statementcase.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'case.keyboardDeleteBackspace: // 'case' label in a 'switch' must have at least one executable statementcase.searchButtonPress: // 'case' label in a 'switch' must have at least one executable statementprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackwards:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackwards:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardCharacterSelect(let character): // 'case' label in a 'switch' must have at least one executable statementcase.keyboardDeleteBackwards: // 'case' label in a 'switch' must have at least one executable statementcase.searchButtonPress: // 'case' label in a 'switch' must have at least one executable statementprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle character selection in search bar
return nil
case.keyboardDeleteBackspace:
// Handle delete backwards in search bar
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle character selection in search bar
return nil
case.keyboardDeleteBackspace:
// Handle delete backwards in search bar
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press action
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press action
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardCharacterSelect(let character): // 'case' label in a 'switch' must have at least one executable statementcase.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'case.keyboardDeleteBackspace: // 'case' label in a 'switch' must have at least one executable statementcase.searchButtonPress: // 'case' label in a 'switch' must have at least one executable statementprotocol 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 searchString = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
searchString.append(character)
return nil
case.keyboardDeleteBackwards:
searchString.removeLast()
return nil
case.searchButtonPress:
guard let city = searchString.first else { return nil }
do {
let forecast = try provider.forecast(for: String(city))
return.success(city: String(city), forecast: forecast)
} catch {
return.failure(city: String(city))
}
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var searchString = ""
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
searchString.append(character)
return nil
case.keyboardDeleteBackwards:
searchString.removeLast()
return nil
case.searchButtonPress:
guard let city = searchString.first else { return nil }
do {
let forecast = try provider.forecast(for: String(city))
return.success(city: String(city), forecast: forecast)
} catch {
return.failure(city: String(city))
}
}
}
}
```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
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle character selection in search bar
return nil
case.keyboardDeleteBackspace:
// Handle delete backwards in search bar
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle character selection in search bar
return nil
case.keyboardDeleteBackspace:
// Handle delete backwards in search bar
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackwards:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackwards:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardCharacterSelect(let character): // 'case' label in a 'switch' must have at least one executable statementcase.keyboardDeleteBackwards: // 'case' label in a 'switch' must have at least one executable statementcase.searchButtonPress: // 'case' label in a 'switch' must have at least one executable statementprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
case.keyboardDeleteBackspace:
// Handle delete backwards action
case.searchButtonPress:
// Handle search button press
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.keyboardCharacterSelect(let character): // 'case' label in a 'switch' must have at least one executable statementcase.keyboardDeleteBackspace: // type 'UserAction' has no member 'keyboardDeleteBackspace'case.keyboardDeleteBackspace: // 'case' label in a 'switch' must have at least one executable statementcase.searchButtonPress: // 'case' label in a 'switch' must have at least one executable statementprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
return nil
case.keyboardDeleteBackwards:
// Handle delete backwards action
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}Question:
Write code in Swift programming language. Don't include usage examples or tests.
Weather application provider.
Handle user actions to fill search bar results and use WeatherProvider to check forecast.
Answer:
```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
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Handle keyboard character selection
return nil
case.keyboardDeleteBackwards:
// Handle delete backwards action
return nil
case.searchButtonPress:
// Handle search button press
return nil
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it