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)
}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 {
// Implementation of JSON parsing logic goes here
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//let result = try parse(string: string) // cannot find 'parse' in scope_ = try parse(string: string) // cannot find 'parse' in scopetypealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Your code here
}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 {
// Your code here
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Your implementation here
}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 {
// Your implementation here
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Your implementation here
}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 {
// Your implementation here
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case 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 {
// implementation of JSON parsing logic
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//let result = try parse(string: string) // cannot find 'parse' in scope_ = try parse(string: string) // cannot find 'parse' in scopetypealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Implement your JSON parsing logic here
// If there's an error, throw a ParsingError.internalError
// If the input is invalid, throw a ParsingError.invalidInput
}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 {
// Implement your JSON parsing logic here
// If there's an error, throw a ParsingError.internalError
// If the input is invalid, throw a ParsingError.invalidInput
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Your implementation here
}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 {
// Your implementation here
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// implementation of JSON parsing logic goes here
// if parsing fails, throw a ParsingError
}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 {
// implementation of JSON parsing logic goes here
// if parsing fails, throw a ParsingError
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
// Your implementation here
}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 {
// Your implementation here
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case 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 {
// implementation of JSON parsing logic
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//let result = try parse(string: string) // cannot find 'parse' in scope_ = try parse(string: string) // cannot find 'parse' in scopeindirect 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 attributeString = ""
for (key, value) in attributes {
attributeString += " \(key)=\"\(value)\""
}
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributeString(attributeString)>(\(childrenString)</\(name)>"
}
}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 attributeString = ""
for (key, value) in attributes {
attributeString += " \(key)=\"\(value)\""
}
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributeString(attributeString)>(\(childrenString)</\(name)>"
}
}
let tree =.element("div", attributes: ["class": "container"])
let html = generate(tree)
print(html)
```return "<\(name) \(attributeString(attributeString)>(\(childrenString)</\(name)>" // cannot find ')' to match opening '(' in string interpolationreturn "<\(name) \(attributeString(attributeString)>(\(childrenString)</\(name)>" // unterminated string literalindirect 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 attributesString = ""
for (key, value) in attributes {
attributesString += " \(key)=\"\(value)\""
}
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString(attributesString)>(\(childrenString)</\(name)>"
}
}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 attributesString = ""
for (key, value) in attributes {
attributesString += " \(key)=\"\(value)\""
}
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString(attributesString)>(\(childrenString)</\(name)>"
}
}
let tree =.element("div", attributes: ["class": "container"])
let html = generate(tree)
print(html)
```return "<\(name) \(attributesString(attributesString)>(\(childrenString)</\(name)>" // unterminated string literalreturn "<\(name) \(attributesString(attributesString)>(\(childrenString)</\(name)>" // cannot find ')' to match opening '(' in string interpolationindirect 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 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
print(generate(tree)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
print(generate(tree)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"])
let html = generate(tree)
print(html)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
print(generate(tree)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
let html = generate(tree)
print(html)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
print(generate(tree)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"], children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("SwiftEval")
])
])
print(generate(tree)
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
var 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.text(let content):
return content
case.element(let name, let attributes, let 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", attributes: ["class": "container"])
let html = generate(tree)
print(html)
```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 "+":
try applyOperator(stack, +)
case "-":
try applyOperator(stack, -)
case "*":
try applyOperator(stack, *)
case "/":
try applyOperator(stack, /)
case "(":
stack.append(0)
case ")":
try applyOperator(stack, +)
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.first!
}
func applyOperator(_ stack: inout Double, _ operator: (Double, Double) -> Double) throws -> ()) {
guard stack.count >= 2 else {
throw CalculateError.invalidInput
}
let right = stack.removeLast()
let left = stack.removeLast()
let result = try operator(left, right)
stack.append(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 "+":
try applyOperator(stack, +)
case "-":
try applyOperator(stack, -)
case "*":
try applyOperator(stack, *)
case "/":
try applyOperator(stack, /)
case "(":
stack.append(0)
case ")":
try applyOperator(stack, +)
default:
if let number = Double(token) {
stack.append(number)
} else {
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.first!
}
func applyOperator(_ stack: inout Double, _ operator: (Double, Double) -> Double) throws -> ()) {
guard stack.count >= 2 else {
throw CalculateError.invalidInput
}
let right = stack.removeLast()
let left = stack.removeLast()
let result = try operator(left, right)
stack.append(result)
}
```try applyOperator(stack, +) // cannot convert value of type '[Double]' to expected argument type 'Double'try applyOperator(stack, -) // cannot convert value of type '[Double]' to expected argument type 'Double'try applyOperator(stack, *) // cannot convert value of type '[Double]' to expected argument type 'Double'try applyOperator(stack, /) // cannot convert value of type '[Double]' to expected argument type 'Double'try applyOperator(stack, +) // cannot convert value of type '[Double]' to expected argument type 'Double'func applyOperator(_ stack: inout Double, _ operator: (Double, Double) -> Double) throws -> ()) { // expected '{' in body of function declarationfunc applyOperator(_ stack: inout Double, _ operator: (Double, Double) -> Double) throws -> ()) { // expected expressionfunc applyOperator(_ stack: inout Double, _ operator: (Double, Double) -> Double) throws -> ()) { // consecutive statements on a line must be separated by ';'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else if let operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try 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:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else if let operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try left / right
default:
throw CalculateError.invalidInput
}
}
func stack.popLast()
let result = try calculate("2+2*2")
print(result) // // 6
```} else if let operator = token.first { // expected pattern} else if let operator = token.first { // expected '{' after 'if' condition} else if let operator = token.first { // unwrap condition requires a valid identifierlet right = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet left = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet result = try calculate(left, operator, right) // cannot convert value of type 'Double?' to expected argument type 'String'let result = try calculate(left, operator, right) // consecutive statements on a line must be separated by ';'let result = try calculate(left, operator, right) // expected expression in list of expressionslet result = try calculate(left, operator, right) // ',' is not allowed in operator namesswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationenum 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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return left / right
default:
throw CalculateError.invalidInput
}
}
func stack.popLast()
let input = "2+2*2"
let result = try calculate(input)
print(result) // 6
```} else if let operator = token.first { // expected pattern} else if let operator = token.first { // expected '{' after 'if' condition} else if let operator = token.first { // unwrap condition requires a valid identifierlet right = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet left = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet result = try calculate(left, operator, right) // cannot convert value of type 'Double?' to expected argument type 'String'let result = try calculate(left, operator, right) // consecutive statements on a line must be separated by ';'let result = try calculate(left, operator, right) // expected expression in list of expressionslet result = try calculate(left, operator, right) // ',' is not allowed in operator namesswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else {
guard let operator = token.first else {
throw CalculateError.invalidInput
}
let right = stack.popLast()?? 0
let left = stack.popLast()?? 0
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
guard right!= 0 else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast() 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:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else {
guard let operator = token.first else {
throw CalculateError.invalidInput
}
let right = stack.popLast()?? 0
let left = stack.popLast()?? 0
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
guard right!= 0 else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
```guard let operator = token.first else { // consecutive statements on a line must be separated by ';'guard let operator = token.first else { // 'operator' may only be declared at file scopeguard let operator = token.first else { // operator must be declared as 'prefix', 'postfix', or 'infix'guard let operator = token.first else { // unwrap condition requires a valid identifierguard let operator = token.first else { // expected patternguard let operator = token.first else { // expected 'else' after 'guard' conditionlet right = stack.popLast()?? 0 // cannot use optional chaining on non-optional value of type 'Double'let right = stack.popLast()?? 0 // integer literal is unusedlet right = stack.popLast()?? 0 // consecutive statements on a line must be separated by ';'let left = stack.popLast()?? 0 // integer literal is unusedlet left = stack.popLast()?? 0 // consecutive statements on a line must be separated by ';'let left = stack.popLast()?? 0 // cannot use optional chaining on non-optional value of type 'Double'switch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationguard right!= 0 else { // '=' must have consistent whitespace on both sidesenum 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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
guard right!= 0 else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
} else {
throw CalculateError.invalidInput
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.popLast()
}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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
guard right!= 0 else {
throw CalculateError.invalidInput
}
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
} else {
throw CalculateError.invalidInput
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.popLast()
}
```} else if let operator = token.first { // expected pattern} else if let operator = token.first { // expected '{' after 'if' condition} else if let operator = token.first { // unwrap condition requires a valid identifierlet right = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet left = try stack.popLast() // no calls to throwing functions occur within 'try' expressionswitch operator { // expected operator name in operator declarationswitch operator { // expected expression in 'switch' statementguard right!= 0 else { // '=' must have consistent whitespace on both sidesreturn stack.popLast() // value of optional type 'Double?' must be unwrapped to a value of type 'Double'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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try 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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try left / right
default:
throw CalculateError.invalidInput
}
}
func stack.popLast()
let result = try calculate("2+2*2")
print(result) // Output: 6.0
```} else if let operator = token.first { // expected pattern} else if let operator = token.first { // expected '{' after 'if' condition} else if let operator = token.first { // unwrap condition requires a valid identifierlet right = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet left = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet result = try calculate(left, operator, right) // cannot convert value of type 'Double?' to expected argument type 'String'let result = try calculate(left, operator, right) // consecutive statements on a line must be separated by ';'let result = try calculate(left, operator, right) // expected expression in list of expressionslet result = try calculate(left, operator, right) // ',' is not allowed in operator namesswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else {
guard let operator = token.first else {
throw CalculateError.invalidInput
}
let right = stack.popLast!
let left = stack.popLast!
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.popLast!
}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:.init(charactersIn: "+-*/()"))
var stack: [Double] = []
for token in tokens {
if let number = Double(token) {
stack.append(number)
} else {
guard let operator = token.first else {
throw CalculateError.invalidInput
}
let right = stack.popLast!
let left = stack.popLast!
switch operator {
case "+":
stack.append(left + right)
case "-":
stack.append(left - right)
case "*":
stack.append(left * right)
case "/":
stack.append(left / right)
default:
throw CalculateError.invalidInput
}
}
}
guard stack.count == 1 else {
throw CalculateError.invalidInput
}
return stack.popLast!
}
```guard let operator = token.first else { // consecutive statements on a line must be separated by ';'guard let operator = token.first else { // 'operator' may only be declared at file scopeguard let operator = token.first else { // operator must be declared as 'prefix', 'postfix', or 'infix'guard let operator = token.first else { // unwrap condition requires a valid identifierguard let operator = token.first else { // expected patternguard let operator = token.first else { // expected 'else' after 'guard' conditionlet right = stack.popLast! // method 'popLast' was used as a property; add () to call itlet right = stack.popLast! // cannot reference 'mutating' method as function valuelet left = stack.popLast! // cannot reference 'mutating' method as function valuelet left = stack.popLast! // method 'popLast' was used as a property; add () to call itswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationreturn stack.popLast! // cannot reference 'mutating' method as function valuereturn stack.popLast! // method 'popLast' was used as a property; add () to call itenum 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 "+":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a + b)
case "-":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b - a)
case "*":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a * b)
case "/":
let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b / a)
case let number as Double:
stack.append(number)
default:
throw CalculateError.invalidInput
}
}
guard let result = stack.pop() 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 "+":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a + b)
case "-":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b - a)
case "*":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a * b)
case "/":
let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b / a)
case let number as Double:
stack.append(number)
default:
throw CalculateError.invalidInput
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
```guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(a + b) // cannot convert value of type 'String' to expected argument type 'Double'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(b - a) // cannot convert value of type 'Duration' to expected argument type 'Double'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(a * b) // cannot convert value of type 'Duration' to expected argument type 'Double'let a = stack.pop(), let b = stack.pop() else { // expected expressionlet a = stack.pop(), let b = stack.pop() else { // 'let' cannot appear nested inside another 'var' or 'let' patternlet a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'let a = stack.pop(), let b = stack.pop() else { // consecutive statements on a line must be separated by ';'case let number as Double: // cast from 'String' to unrelated type 'Double' always failsguard let result = stack.pop() else { // value of type '[Double]' has no member 'pop'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 "+":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a + b)
case "-":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b - a)
case "*":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a * b)
case "/":
let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b / a)
case let number as Double:
stack.append(number)
default:
throw CalculateError.invalidInput
}
}
guard let result = stack.pop() 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 "+":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a + b)
case "-":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b - a)
case "*":
guard let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(a * b)
case "/":
let a = stack.pop(), let b = stack.pop() else {
throw CalculateError.invalidInput
}
stack.append(b / a)
case let number as Double:
stack.append(number)
default:
throw CalculateError.invalidInput
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
```guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(a + b) // cannot convert value of type 'String' to expected argument type 'Double'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(b - a) // cannot convert value of type 'Duration' to expected argument type 'Double'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'guard let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'stack.append(a * b) // cannot convert value of type 'Duration' to expected argument type 'Double'let a = stack.pop(), let b = stack.pop() else { // expected expressionlet a = stack.pop(), let b = stack.pop() else { // 'let' cannot appear nested inside another 'var' or 'let' patternlet a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'let a = stack.pop(), let b = stack.pop() else { // value of type '[Double]' has no member 'pop'let a = stack.pop(), let b = stack.pop() else { // consecutive statements on a line must be separated by ';'case let number as Double: // cast from 'String' to unrelated type 'Double' always failsguard let result = stack.pop() else { // value of type '[Double]' has no member 'pop'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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try 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 operator = token.first {
let right = try stack.popLast()
let left = try stack.popLast()
let result = try calculate(left, operator, right)
stack.append(result)
} else {
throw CalculateError.invalidInput
}
}
guard let result = stack.popLast() else {
throw CalculateError.invalidInput
}
return result
}
func calculate(_ left: Double, _ operator: Character, _ right: Double) throws -> Double {
switch operator {
case "+":
return left + right
case "-":
return left - right
case "*":
return left * right
case "/":
return try left / right
default:
throw CalculateError.invalidInput
}
}
func stack.popLast()
let result = try calculate("2+2*2")
print(result) // // 6.0
```} else if let operator = token.first { // expected pattern} else if let operator = token.first { // expected '{' after 'if' condition} else if let operator = token.first { // unwrap condition requires a valid identifierlet right = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet left = try stack.popLast() // no calls to throwing functions occur within 'try' expressionlet result = try calculate(left, operator, right) // cannot convert value of type 'Double?' to expected argument type 'String'let result = try calculate(left, operator, right) // consecutive statements on a line must be separated by ';'let result = try calculate(left, operator, right) // expected expression in list of expressionslet result = try calculate(left, operator, right) // ',' is not allowed in operator namesswitch operator { // expected expression in 'switch' statementswitch operator { // expected operator name in operator declarationfunc execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}
```let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (output, error)
}
```let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}
```let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (output, error)
}
```let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}
```let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (stdout, stderr)
}
```let stdout = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let stderr = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
let output = process.standardOutput.read UTF8String
let error = process.standardError.read UTF8String
process.waitUntilExit()
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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
let output = process.standardOutput.read UTF8String
let error = process.standardError.read UTF8String
process.waitUntilExit()
return (output, error)
}
```let output = process.standardOutput.read UTF8String // value of type 'Any?' has no member 'read'let output = process.standardOutput.read UTF8String // cannot find 'UTF8String' in scopelet output = process.standardOutput.read UTF8String // consecutive statements on a line must be separated by ';'let error = process.standardError.read UTF8String // value of type 'Any?' has no member 'read'let error = process.standardError.read UTF8String // cannot find 'UTF8String' in scopelet error = process.standardError.read UTF8String // consecutive statements on a line must be separated by ';'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let outputData = process.standardOutput.readAll()
let errorData = process.standardError.readAll()
let output = String(data: outputData, encoding:.utf8)!
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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let outputData = process.standardOutput.readAll()
let errorData = process.standardError.readAll()
let output = String(data: outputData, encoding:.utf8)!
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```let outputData = process.standardOutput.readAll() // value of type 'Any?' has no member 'readAll'let errorData = process.standardError.readAll() // value of type 'Any?' has no member 'readAll'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let outputData = process.standardOutput.readAll()
let errorData = process.standardError.readAll()
let output = String(data: outputData, encoding:.utf8)!
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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let outputData = process.standardOutput.readAll()
let errorData = process.standardError.readAll()
let output = String(data: outputData, encoding:.utf8)!
let error = String(data: errorData, encoding:.utf8)!
return (output, error)
}
```let outputData = process.standardOutput.readAll() // value of type 'Any?' has no member 'readAll'let errorData = process.standardError.readAll() // value of type 'Any?' has no member 'readAll'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.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 process = Process()
process.launchPath = binary
process.arguments = arguments
process.launch()
process.waitUntilExit()
let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)!
let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)!
return (output, error)
}
```let output = String(data: process.standardOutput.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'let error = String(data: process.standardError.readDataToEndOfFile(), encoding:.utf8)! // value of type 'Any?' has no member 'readDataToEndOfFile'func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let output = cache[input] {
return output
} else {
let output = function(input)
cache[input] = output
return output
}
}
}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 output = cache[input] {
return output
} else {
let output = function(input)
cache[input] = output
return output
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}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 { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = 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 { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = 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 { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = 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 { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let result = cache[input] {
return result
} 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 result = cache[input] {
return result
} 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 { input in
if let result = cache[input] {
return result
} 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 result = cache[input] {
return result
} 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 { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = 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 { arg in
if let result = cache[arg] {
return result
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { input in
if let result = cache[input] {
return result
} 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 result = cache[input] {
return result
} 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 result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = 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 { argument in
if let result = cache[argument] {
return result
} else {
let result = function(argument)
cache[argument] = result
return result
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsMade = 0
repeat {
do {
result = try task()
} catch {
attemptsMade += 1
if attemptsMade >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsMade = 0
repeat {
do {
result = try task()
} catch {
attemptsMade += 1
if attemptsMade >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsCount = 0
repeat {
do {
result = try task()
} catch {
attemptsCount += 1
if attemptsCount >= attempts {
throw error
}
}
} while result == nil
return result!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var attemptsMade = 0
repeat {
do {
result = try task()
} catch {
attemptsMade += 1
if attemptsMade >= attempts {
throw error
}
}
} while result == nil
return result!
}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 result: T?
var attemptsMade = 0
repeat {
do {
result = try task()
} catch {
attemptsMade += 1
if attemptsMade >= attempts {
throw error
}
}
} while result == nil
return result!
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else { return nil }
return registration() as? T
}
}
// Usage
let container = DIContainer()
container.register(MyService.self) { MyService() }
container.register(MyOtherService.self) { OtherService() }
let myService = container.resolve(MyService.self)
let otherService = container.resolve(OtherService.self)
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
// Example usage
let container = DIContainer()
container.register(Int.self) { 42 }
container.register(String.self) { "Hello, DI Container!" }
let intValue = container.resolve(Int.self) // // 42
let stringValue = container.resolve(String.self) // "Hello, DI Container!"
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var registrations = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() 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 = [Any.Type: () -> Any]()
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
registrations[type] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let registration = registrations[type] else {
return nil
}
return registration() as? T
}
}
// Example usage
let container = DIContainer()
container.register(Int.self) { 42 }
container.register(String.self) { "Hello, world!" }
let answer = container.resolve(Int.self) //
let greeting = container.resolve(String.self)
```private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' cannot conform to 'Hashable'private var registrations = [Any.Type: () -> Any]() // type 'any Any.Type' does not conform to protocol 'Hashable'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("Transition not registered")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("Transition not registered")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from, event, to))
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count)
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let nextState = transitions[currentState][event] {
currentState = nextState
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count)
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let nextState = transitions[currentState][event] {
currentState = nextState
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from][event] = to
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count) // type 'State' has no member 'allCases'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'if let nextState = transitions[currentState][event] { // cannot convert value of type 'State' to expected argument type 'Int'transitions[from][event] = to // cannot convert value of type 'State' to expected argument type 'Int'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from, event, to))
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit)
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] {
currentState = nextState
} else {
print("Transition not registered")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[Hashable.hash(value: from)][Hashable.hash(value: 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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit)
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] {
currentState = nextState
} else {
print("Transition not registered")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to
}
}
```private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // type 'any Hashable' has no member 'hashLimit'private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // type 'any Hashable' has no member 'hashLimit'private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // 'nil' is not compatible with expected argument type 'Event'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // extraneous argument label 'value:' in callif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // use of protocol 'Hashable' as a type must be written 'any Hashable'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // no exact matches in call to subscriptif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // extraneous argument label 'value:' in callif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // use of protocol 'Hashable' as a type must be written 'any Hashable'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // no exact matches in call to subscripttransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // use of protocol 'Hashable' as a type must be written 'any Hashable'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // extraneous argument label 'value:' in calltransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no exact matches in call to subscripttransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no 'to' candidates produce the expected contextual result type 'Event'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // extraneous argument label 'value:' in calltransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // use of protocol 'Hashable' as a type must be written 'any Hashable'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no exact matches in call to subscriptprotocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[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.flatMap({$0[event]}).first {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if let row = transitions.first(where: {$0[event] == nil}) {
row[event] = to: to
} else {
transitions.append([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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[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.flatMap({$0[event]}).first {
currentState = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if let row = transitions.first(where: {$0[event] == nil}) {
row[event] = to: to
} else {
transitions.append([event: to])
}
}
}
```init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'if let nextState = transitions.flatMap({$0[event]}).first { // 'flatMap' is deprecated: Please use compactMap(_:) for the case where closure returns an optional valuerow[event] = to: to // consecutive statements on a line must be separated by ';'row[event] = to: to // cannot assign through subscript: 'row' is a 'let' constantrow[event] = to: to // expected expressionprotocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
// Handle error or throw exception
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
// Handle error or throw exception
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from, event, to))
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count)
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let nextState = transitions[currentState][event] {
currentState = nextState
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count)
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let nextState = transitions[currentState][event] {
currentState = nextState
} else {
print("Transition from \(currentState) via \(event) not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from][event] = to
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'private var transitions: [[Event: State]] = Array(repeating: [:], count: State.allCases.count) // type 'State' has no member 'allCases'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'if let nextState = transitions[currentState][event] { // cannot convert value of type 'State' to expected argument type 'Int'transitions[from][event] = to // cannot convert value of type 'State' to expected argument type 'Int'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("No transition registered for (currentState, event)")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { $0.0 == currentState && $0.1 == event }) {
currentState = transition.2
} else {
print("No transition registered for (currentState, event)")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from, event, to))
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { ($0.0 == currentState) && ($0.1 == event) }) {
currentState = transition.2
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [(State, Event, State)] = []
private var currentState: State
init(state: State) {
self.currentState = state
}
func trigger(event: Event) {
if let transition = transitions.first(where: { ($0.0 == currentState) && ($0.1 == event) }) {
currentState = transition.2
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from, event, to))
}
}
```class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol { // type 'StateMachine<State, Event>' does not conform to protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .yellow) // type 'Equatable' has no member 'yellow'XCTAssertEqual(stateMachine.state, .red) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'XCTAssertEqual(stateMachine.state, .red) // type 'Equatable' has no member 'red'XCTAssertEqual(stateMachine.state, .green) // type 'Equatable' has no member 'green'XCTAssertEqual(stateMachine.state, .green) // value of type 'StateMachine<TrafficLightState, TrafficLightEvent>' has no member 'state'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit)
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] {
currentState = nextState
} else {
print("Transition from '\(currentState)' via '\(event)' not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[Hashable.hash(value: from)][Hashable.hash(value: 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: Hashable, Event: Hashable>: StateMachineProtocol {
private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit)
private var currentState: State
init(state: State) {
self.currentState = state
}
var state: State {
return currentState
}
func trigger(event: Event) {
if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] {
currentState = nextState
} else {
print("Transition from '\(currentState)' via '\(event)' not defined")
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to
}
}
```private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // type 'any Hashable' has no member 'hashLimit'private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // type 'any Hashable' has no member 'hashLimit'private var transitions: [[Event]] = Array(repeating: Array(repeating: nil, count: Hashable.hashLimit), count: Hashable.hashLimit) // 'nil' is not compatible with expected argument type 'Event'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // extraneous argument label 'value:' in callif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // use of protocol 'Hashable' as a type must be written 'any Hashable'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // no exact matches in call to subscriptif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // extraneous argument label 'value:' in callif let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // use of protocol 'Hashable' as a type must be written 'any Hashable'if let nextState = transitions[Hashable.hash(value: currentState)][Hashable.hash(value: event)] { // no exact matches in call to subscripttransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // use of protocol 'Hashable' as a type must be written 'any Hashable'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // extraneous argument label 'value:' in calltransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no exact matches in call to subscripttransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no 'to' candidates produce the expected contextual result type 'Event'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // extraneous argument label 'value:' in calltransitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // use of protocol 'Hashable' as a type must be written 'any Hashable'transitions[Hashable.hash(value: from)][Hashable.hash(value: event)] = to // no exact matches in call to subscriptindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 1
}
}
}
let fileSystem = FileSystemNode.directory(name: "", contents: [
FileSystemNode.file(name: "a", size: 1000),
FileSystemNode.file(name: "b", size: 200),
FileSystemNode.directory(name: "c", contents: [
FileSystemNode(name: "d", size: 300),
FileSystemNode(name: "e", size: 400)
])
])])
print(fileSystem.totalSize) // // // 1000000
print(100) // // 3
print(fileSystem.treeDepth) // // 4
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 1 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 1 // consecutive statements on a line must be separated by ';'return 1 + contents.map { $0.treeDepth }.max()?? 1 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 1 // cannot use optional chaining on non-optional value of type 'Int'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
let fileSystem = FileSystemNode.directory(
name: "",
contents: [
FileSystemNode.file(name: "a.txt", size: 100),
FileSystemNode.file(name: "b.txt", size: 20),
FileSystemNode.directory(name: "c", contents: [
FileSystemNode(name: "c1.txt", size: 30),
FileSystemNode(name: "c2.txt", size: 40)
])
]
)
print(fileSystem.totalSize) // // 1000
print(fileSystem.filesCount) // // 5
print(fileSystem.treeDepth) // // 3
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
let fileSystem = FileSystemNode.directory(
name: "",
contents: [
FileSystemNode.file(name: "file1", size: 10),
FileSystemNode.file(name: "2", size: 20),
FileSystemNode.directory(name: "dir", contents: [
FileSystemNode.file(name: "3", size: 30),
FileSystemNode(name: "4", size: 40)
])
]
)
print(fileSystem.totalSize) // // 1000
print(fileSystem.filesCount) // // 4
print(fileSystem.treeDepth) // 3
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
let fileSystem = FileSystemNode.directory(
name: "",
contents: [
FileSystemNode.file(name: "a.txt", size: 100),
FileSystemNode.file(name: "b.txt", size: 20),
FileSystemNode.directory(name: "c", contents: [
FileSystemNode(name: "c1.txt", size: 30),
FileSystemNode(name: "c2.txt", size: 40)
])
]
)
print(fileSystem.totalSize) // // 1000
print(fileSystem.filesCount) // // 5
print(fileSystem.treeDepth) // // 3
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.reduce(into: 0) { $0 = max($0, $1.treeDepth) }
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.reduce(into: 0) { $0 += $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.reduce(into: 0) { $0 = max($0, $1.treeDepth) }
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
let fileSystem = FileSystemNode.directory(name: "", contents: [
FileSystemNode.file(name: "file1.txt", size: 10),
FileSystemNode.directory(name: "2", contents: [
FileSystemNode(name: "2.1", size: 20),
FileSystemNode(name: "2.2", size: 20)
])
])])
print(fileSystem.totalSize) // // 70
print(fileSystem.filesCount) // // 4
print(fileSystem.treeDepth) // // 3
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // 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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}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 name, let size):
return size
case.directory(let name, let contents):
return contents.map { $0.totalSize }.reduce(0, +)
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return contents.map { $0.filesCount }.reduce(0, +)
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(let name, let contents):
return 1 + contents.map { $0.treeDepth }.max()?? 0
}
}
}
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn 1 + contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return 1 + contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'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
}
}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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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>'return elements.popLast // function produces expected type 'Element?'; did you mean to call it with '()'?return elements.popLast // cannot reference 'mutating' method as function valuevar 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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'accessOrder.remove(removedKey) // no exact matches in call to instance method 'remove'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'accessOrder.remove(removedKey) // no exact matches in call to instance method 'remove'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
guard let value!= nil else { return }
if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
guard let value!= nil else { return }
if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'guard let value!= nil else { return } // 'nil' requires a contextual typeguard let value!= nil else { return } // pattern matching in a condition requires the 'case' keywordguard let value!= nil else { return } // pattern variable binding cannot appear in an expressionguard let value!= nil else { return } // '=' must have consistent whitespace on both sidesprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache.keys.first, removedKey!= key {
cache.remove(at: removedKey)
accessOrder.remove(at: 0)
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache.keys.first, removedKey!= key {
cache.remove(at: removedKey)
accessOrder.remove(at: 0)
}
cache[key] = newValue
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'if let removedKey = cache.keys.first, removedKey!= key { // use of '=' in a boolean context, did you mean '=='?if let removedKey = cache.keys.first, removedKey!= key { // cannot force unwrap value of non-optional type 'Dictionary<Key, Element>.Keys.Element' (aka 'Key')if let removedKey = cache.keys.first, removedKey!= key { // '=' must have consistent whitespace on both sidescache.remove(at: removedKey) // cannot convert value of type 'Dictionary<Key, Element>.Keys.Element' (aka 'Key') to expected argument type 'Dictionary<Key, Element>.Index'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var keys = [Key]()
init(capacity: Int) {
assert(capacity > 0, "Capacity must be greater than 0")
self.capacity = capacity
}
private let capacity: Int
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
keys.remove(key)
keys.append(key)
return value
}
set {
guard let value!= newValue else { return }
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
cache[keys.removeFirst] = 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]()
private var keys = [Key]()
init(capacity: Int) {
assert(capacity > 0, "Capacity must be greater than 0")
self.capacity = capacity
}
private let capacity: Int
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
keys.remove(key)
keys.append(key)
return value
}
set {
guard let value!= newValue else { return }
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
cache[key] = newValue
keys.append(key)
if keys.count > capacity {
cache[keys.removeFirst] = nil
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'keys.remove(key) // no exact matches in call to instance method 'remove'guard let value!= newValue else { return } // pattern variable binding cannot appear in an expressionguard let value!= newValue else { return } // pattern matching in a condition requires the 'case' keywordguard let value!= newValue else { return } // '=' must have consistent whitespace on both sidescache[keys.removeFirst] = nil // cannot reference 'mutating' method as function valuecache[keys.removeFirst] = nil // function produces expected type 'Key'; did you mean to call it with '()'?protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'accessOrder.remove(removedKey) // no exact matches in call to instance method 'remove'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
guard let value = newValue else {
cache[key] = nil
accessOrder.removeAll(where: { $0 == key })
return
}
if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = value
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
guard let value = newValue else {
cache[key] = nil
accessOrder.removeAll(where: { $0 == key })
return
}
if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = value
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'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'accessOrder.remove(removedKey) // no exact matches in call to instance method 'remove'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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 let capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
accessOrder.remove(key)
accessOrder.append(key)
return value
}
set {
if let removedKey = cache[key] {
accessOrder.remove(removedKey)
} else if cache.count >= capacity {
cache[accessOrder.removeFirst()] = nil
}
cache[key] = newValue
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'accessOrder.remove(removedKey) // no exact matches in call to instance method 'remove'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var cache = [Key: Element]()
private var keys = [Key]()
init(capacity: Int) {
assert(capacity > 0, "Capacity must be greater than 0")
self.capacity = capacity
}
private let capacity: Int
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
keys.remove(key)
keys.append(key)
return value
}
set {
guard let value!= newValue else { return }
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
cache[key] = newValue
keys.append(key)
while keys.count > capacity {
cache[keys.removeFirst] = 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]()
private var keys = [Key]()
init(capacity: Int) {
assert(capacity > 0, "Capacity must be greater than 0")
self.capacity = capacity
}
private let capacity: Int
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
keys.remove(key)
keys.append(key)
return value
}
set {
guard let value!= newValue else { return }
if let index = keys.firstIndex(of: key) {
keys.remove(at: index)
}
cache[key] = newValue
keys.append(key)
while keys.count > capacity {
cache[keys.removeFirst] = nil
}
}
}
}
```init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Element>'keys.remove(key) // no exact matches in call to instance method 'remove'guard let value!= newValue else { return } // pattern variable binding cannot appear in an expressionguard let value!= newValue else { return } // pattern matching in a condition requires the 'case' keywordguard let value!= newValue else { return } // '=' must have consistent whitespace on both sidescache[keys.removeFirst] = nil // cannot reference 'mutating' method as function valuecache[keys.removeFirst] = nil // function produces expected type 'Key'; did you mean to call it with '()'?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 let cache = [Key: (Value, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince1970 { return value } else { cache[key] = nil; return nil }
}
}
extension ExpirableCache: Subscript {
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 60) }
}
}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 let cache = [Key: (Value, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince1970 { return value } else { cache[key] = nil; return nil }
}
}
extension ExpirableCache: Subscript {
subscript(key: Key) -> Value? {
get { return get(key: key) }
set { put(value: newValue, key: key, expiration: 60) }
}
}
```cache[key] = (value, expiration) // cannot assign through subscript: 'cache' is a 'let' constantif expiration > Date().timeIntervalSince1970 { return value } else { cache[key] = nil; return nil } // cannot assign through subscript: 'cache' is a 'let' constantextension ExpirableCache: Subscript { // cannot find type 'Subscript' in scopeset { put(value: newValue, key: key, expiration: 60) } // value of optional type 'Value?' must be unwrapped to a value of type 'Value'Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
subscript(key: Key) -> Value? {
get {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
set {
guard let expiration = newValue!= nil else {
cache[key] = nil
return
}
cache[key] = (newValue!, 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, TimeInterval)]()
subscript(key: Key) -> Value? {
get {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
set {
guard let expiration = newValue!= nil else {
cache[key] = nil
return
}
cache[key] = (newValue!, Date().timeIntervalSince1970 + expiration)
}
}
}
```class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol { // type 'ExpirableCache<Key, Value>' does not conform to protocol 'ExpirableCacheProtocol'return nil // expected 'get', 'set', 'willSet', or 'didSet' keyword to start an accessor definitionset { // expected 'func' keyword in instance method declarationset { // expected '(' in argument list of function declarationguard let expiration = newValue!= nil else { // '=' must have consistent whitespace on both sidesguard let expiration = newValue!= nil else { // cannot find 'newValue' in scopecache[key] = nil // cannot find 'key' in scopecache[key] = (newValue!, Date().timeIntervalSince1970 + expiration) // cannot find 'newValue' in scopecache[key] = (newValue!, Date().timeIntervalSince1970 + expiration) // cannot find 'key' in scope} // extraneous '}' at top levelcache.put(value: "Hello, SwiftEval!", key: "greeting", expiration: 1.0) // value of type 'ExpirableCache<String, String>' has no member 'put'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 6XCTAssertNil(cache.get(key: "greeting")) // value of type 'ExpirableCache<String, String>' has no member 'get'cache.put(value: "Hello, SwiftEval!", key: "greeting", expiration: 1.0) // value of type 'ExpirableCache<String, String>' has no member 'put'Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6XCTAssertEqual(cache.get(key: "greeting"), "Hello, SwiftEval!") // value of type 'ExpirableCache<String, String>' has no member 'get'protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince1970 { return value }
cache[key] = nil
return nil
}
subscript(key: Key) -> Value? {
get(key: key)
}
subscript(key: Key) -> Value? {
set(newValue, key: key)
}
}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, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince1970 { return value }
cache[key] = nil
return nil
}
subscript(key: Key) -> Value? {
get(key: key)
}
subscript(key: Key) -> Value? {
set(newValue, key: key)
}
}
```get(key: key) // expected '{' to start getter definitionsubscript(key: Key) -> Value? { // invalid redeclaration of 'subscript(_:)'set(newValue, key: key) // expected ')' after setter parameter nameset(newValue, key: key) // expected '{' to start setter definitionThread.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 let cache = [Key: (Value, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return cache[key]
} set(newValue) {
cache[key] = (newValue, Date().timeIntervalSince1970 + expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 {
return value } else { cache[key] = nil }
}
}
enum EvictionPolicy {
case leastRecentlyUsed
caseLeastRecentlyUnused
case LeastRecentlyAdded
caseLeastRecently Evicted
caseLeastRecentlyAccessed
caseLeastAccessed
caseLeast Evicted
caseMostEvicted
}
class EvictionPolicy {
func evict(cache: ExpirableCacheProtocol) {
switch self {
case.leastRecentlyUsed:
cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince170 }
case.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
}
}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 let cache = [Key: (Value, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return cache[key]
} set(newValue) {
cache[key] = (newValue, Date().timeIntervalSince1970 + expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 {
return value } else { cache[key] = nil }
}
}
enum EvictionPolicy {
case leastRecentlyUsed
caseLeastRecentlyUnused
case LeastRecentlyAdded
caseLeastRecently Evicted
caseLeastRecentlyAccessed
caseLeastAccessed
caseLeast Evicted
caseMostEvicted
}
}
class EvictionPolicy {
func evict(cache: ExpirableCacheProtocol) {
switch self {
case.leastRecentlyUsed:
cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince170 }
case.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
case.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 }
}
}
```private let evictionPolicy: EvictionPolicy // 'EvictionPolicy' is ambiguous for type lookup in this contextinit(evictionPolicy: EvictionPolicy) { // 'EvictionPolicy' is ambiguous for type lookup in this contextreturn cache[key] // cannot convert return expression of type '(Value, TimeInterval)?' (aka 'Optional<(Value, Double)>') to return type 'Value?'cache[key] = (newValue, Date().timeIntervalSince1970 + expiration) // cannot assign value of type '(Value?, Double)' to subscript of type '(Value, TimeInterval)' (aka '(Value, Double)')cache[key] = (newValue, Date().timeIntervalSince1970 + expiration) // cannot assign through subscript: 'cache' is a 'let' constantcache[key] = (newValue, Date().timeIntervalSince1970 + expiration) // cannot find 'expiration' in scopecache[key] = (value, Date().timeIntervalSince1970 + expiration) // cannot assign through subscript: 'cache' is a 'let' constantif let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 { // value of type 'Date' has no member 'timeIntervalSince170'return value } else { cache[key] = nil } // cannot assign through subscript: 'cache' is a 'let' constantcaseLeastRecentlyUnused // found an unexpected second identifier in enum 'case' declaration; is there an accidental break?caseLeastRecently Evicted // consecutive declarations on a line must be separated by ';'caseLeastRecently Evicted // found an unexpected second identifier in enum 'case' declaration; is there an accidental break?caseLeastRecently Evicted // expected declarationclass EvictionPolicy { // invalid redeclaration of 'EvictionPolicy'func evict(cache: ExpirableCacheProtocol) { // use of protocol 'ExpirableCacheProtocol' as a type must be written 'any ExpirableCacheProtocol'case.leastRecentlyUsed: // type 'EvictionPolicy' has no member 'leastRecentlyUsed'cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince170 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince170 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'case.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'case.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // type 'EvictionPolicy' has no member 'LeastUnused'case.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // expected ')' in expression listcase.LeastUnused: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcase.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'case.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcase.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // expected ')' in expression listcase.LeastRecentlyAdded: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // type 'EvictionPolicy' has no member 'LeastRecentlyAdded'case.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // expected ')' in expression listcase.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcase.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'case.RecentlyEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // type 'EvictionPolicy' has no member 'RecentlyEvicted'case.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcase.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // expected ')' in expression listcase.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'case.LeastAccessed: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // type 'EvictionPolicy' has no member 'LeastAccessed'case.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // expected ')' in expression listcase.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // type 'EvictionPolicy' has no member 'MostEvicted'case.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // member 'get' cannot be used on value of type 'any ExpirableCacheProtocol'; consider using a generic constraint insteadcase.MostEvicted: cache.get(key: cache.keys.keys.sorted { $0.timeIntervalSince10 } // value of type 'any ExpirableCacheProtocol' has no member 'keys'} // expected ')' in expression listThread.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 6try await test() // expected declarationprotocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
} set(newValue) {
put(value: newValue, key: key: key, expiration: 60)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
evictionPolicy.notify(key: key)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197970 { return value } else {
cache[key] = nil
evictionPolicy.notify(key: key)
return nil
}
}
}
protocol EvictionPolicy {
associatedtypealias Key: Hashable
func notify(key: Key)
}
class FIFOEvictionPolicy: EvictionPolicy {
private var fifo = [Key]()
func notify(key: Key) {
fifo.append(key)
}
func notify(key: Key) {
guard fifo.count > 0 else { return }
let first = fifo.removeFirst()
if first!= key { fifo.removeFirst()
}
}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, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
} set(newValue) {
put(value: newValue, key: key: key, expiration: 60)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
evictionPolicy.notify(key: key)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197970 { return value } else {
cache[key] = nil
evictionPolicy.notify(key: key)
return nil
}
}
}
protocol EvictionPolicy {
associatedtypealias Key: Hashable
func notify(key: Key)
}
class FIFOEvictionPolicy: EvictionPolicy {
private var fifo = [Key]()
func notify(key: Key) {
fifo.append(key)
}
func notify(key: Key) {
guard fifo.count > 0 else { return }
let first = fifo.removeFirst()
if first!= key { fifo.removeFirst()
}
}
}
```put(value: newValue, key: key: key, expiration: 60) // expected expression in list of expressionsput(value: newValue, key: key: key, expiration: 60) // expected ',' separatorput(value: newValue, key: key: key, expiration: 60) // value of optional type 'Value?' must be unwrapped to a value of type 'Value'if expiration > Date().timeIntervalSince197970 { return value } else { // value of type 'Date' has no member 'timeIntervalSince197970'associatedtypealias Key: Hashable // found an unexpected second identifier in function declaration; is there an accidental break?associatedtypealias Key: Hashable // expected 'func' keyword in instance method declarationassociatedtypealias Key: Hashable // expected '->' after function parameter tupleassociatedtypealias Key: Hashable // expected '(' in argument list of function declarationassociatedtypealias Key: Hashable // use of protocol 'Hashable' as a type must be written 'any Hashable'func notify(key: Key) // cannot find type 'Key' in scopeclass FIFOEvictionPolicy: EvictionPolicy { // type 'FIFOEvictionPolicy' does not conform to protocol 'EvictionPolicy'private var fifo = [Key]() // cannot call value of non-function type '[Any]'private var fifo = [Key]() // cannot find 'Key' in scopefunc notify(key: Key) { // cannot find type 'Key' in scopefunc notify(key: Key) { // cannot find type 'Key' in scopeif first!= key { fifo.removeFirst() // use of '=' in a boolean context, did you mean '=='?if first!= key { fifo.removeFirst() // '=' must have consistent whitespace on both sideslet cache = ExpirableCache<String, String>() // missing argument for parameter 'evictionPolicy' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6try await test() // expected declarationprotocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set(newValue) {
put(value: newValue, key: key: key, expiration: evictionPolicy.expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197970 { return value }
cache[key] = nil
return nil
}
}
protocol EvictionPolicy {
var expiration: TimeInterval { get }
}
struct TimeBasedEvictionPolicy: EvictionPolicy {
let expiration: TimeInterval
}
struct AccessCountEvictionPolicy: Eviction {
let expiration: TimeInterval
private var accessCount = 0
func accessed() { accessCount += 1 }
}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, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set(newValue) {
put(value: newValue, key: key: key, expiration: evictionPolicy.expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197970 { return value }
cache[key] = nil
return nil
}
}
protocol EvictionPolicy {
var expiration: TimeInterval { get }
}
struct TimeBasedEvictionPolicy: EvictionPolicy {
let expiration: TimeInterval
}
struct AccessCountEvictionPolicy: Eviction {
let expiration: TimeInterval
private var accessCount = 0
func accessed() { accessCount += 1 }
}
}
```put(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // expected ',' separatorput(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // expected expression in list of expressionsput(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // value of optional type 'Value?' must be unwrapped to a value of type 'Value'if expiration > Date().timeIntervalSince197970 { return value } // value of type 'Date' has no member 'timeIntervalSince197970'struct AccessCountEvictionPolicy: Eviction { // cannot find type 'Eviction' in scopefunc accessed() { accessCount += 1 } // left side of mutating operator isn't mutable: 'self' is immutablelet cache = ExpirableCache<String, String>() // missing argument for parameter 'evictionPolicy' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
subscript(key: Key) -> Value? {
get {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
set {
guard let value = newValue else { return }
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 { return value } else { 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, TimeInterval)] = [:]
subscript(key: Key) -> Value? {
get {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
set {
guard let value = newValue else { return }
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 { return value } else { return nil }
}
}
```class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol { // type 'ExpirableCache<Key, Value>' does not conform to protocol 'ExpirableCacheProtocol'return nil // expected 'get', 'set', 'willSet', or 'didSet' keyword to start an accessor definitionset { // expected 'func' keyword in instance method declarationset { // expected '(' in argument list of function declarationguard let value = newValue else { return } // cannot find 'newValue' in scopecache[key] = (value, Date().timeIntervalSince1970 + expiration) // cannot find 'key' in scopecache[key] = (value, Date().timeIntervalSince1970 + expiration) // cannot find 'expiration' in scopefunc put(value: Value, key: Key, expiration: TimeInterval) { // cannot find type 'Value' in scopefunc put(value: Value, key: Key, expiration: TimeInterval) { // cannot find type 'Key' in scopecache[key] = (value, Date().timeIntervalSince1970 + expiration) // cannot find 'cache' in scopefunc get(key: Key) -> Value? { // cannot find type 'Key' in scopefunc get(key: Key) -> Value? { // cannot find type 'Value' in scopeif let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 { return value } else { return nil } // value of type 'Date' has no member 'timeIntervalSince170'if let (value, expiration) = cache[key], expiration > Date().timeIntervalSince170 { return value } else { return nil } // cannot find 'cache' in scope} // extraneous '}' at top levelcache.put(value: "Hello, SwiftEval!", key: "greeting", expiration: 1.0) // value of type 'ExpirableCache<String, String>' has no member 'put'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 6XCTAssertNil(cache.get(key: "greeting")) // value of type 'ExpirableCache<String, String>' has no member 'get'cache.put(value: "Hello, SwiftEval!", key: "greeting", expiration: 1.0) // value of type 'ExpirableCache<String, String>' has no member 'put'Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6XCTAssertEqual(cache.get(key: "greeting"), "Hello, SwiftEval!") // value of type 'ExpirableCache<String, String>' has no member 'get'protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set(newValue) {
put(value: newValue, key: key: key, expiration: evictionPolicy.expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197000 { return value } else { cache[key] = nil return nil }
}
}
protocol EvictionPolicy {
var expiration: TimeInterval { get }
}
struct TimeBasedEvictionPolicy: EvictionPolicy {
let expiration: TimeInterval
}
struct AccessCountEvictionPolicy: Eviction {
let expiration: TimeInterval
private var accessCount = 0
func accessed() {
accessCount += 1
}
}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, TimeInterval)]()
private let evictionPolicy: EvictionPolicy
init(evictionPolicy: EvictionPolicy) {
self.evictionPolicy = evictionPolicy
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set(newValue) {
put(value: newValue, key: key: key, expiration: evictionPolicy.expiration)
}
}
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key] else { return nil }
if expiration > Date().timeIntervalSince197000 { return value } else { cache[key] = nil return nil }
}
}
protocol EvictionPolicy {
var expiration: TimeInterval { get }
}
struct TimeBasedEvictionPolicy: EvictionPolicy {
let expiration: TimeInterval
}
struct AccessCountEvictionPolicy: Eviction {
let expiration: TimeInterval
private var accessCount = 0
func accessed() {
accessCount += 1
}
}
}
```put(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // expected ',' separatorput(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // expected expression in list of expressionsput(value: newValue, key: key: key, expiration: evictionPolicy.expiration) // value of optional type 'Value?' must be unwrapped to a value of type 'Value'if expiration > Date().timeIntervalSince197000 { return value } else { cache[key] = nil return nil } // consecutive statements on a line must be separated by ';'if expiration > Date().timeIntervalSince197000 { return value } else { cache[key] = nil return nil } // value of type 'Date' has no member 'timeIntervalSince197000'struct AccessCountEvictionPolicy: Eviction { // cannot find type 'Eviction' in scopeaccessCount += 1 // left side of mutating operator isn't mutable: 'self' is immutablelet cache = ExpirableCache<String, String>() // missing argument for parameter 'evictionPolicy' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
subscript(key: Key) -> Value? {
get(key: key)
}
subscript(key: Key) -> Value? {
set(newValue, key: key: key) }
}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, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value }
}
return nil
}
subscript(key: Key) -> Value? {
get(key: key)
}
subscript(key: Key) -> Value? {
set(newValue, key: key: key) }
}
```get(key: key) // expected '{' to start getter definitionsubscript(key: Key) -> Value? { // invalid redeclaration of 'subscript(_:)'set(newValue, key: key: key) } // expected ')' after setter parameter nameset(newValue, key: key: key) } // expected '{' to start setter definitionThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache = [Key: (Value, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get(key: key)
}
}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, TimeInterval)]()
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date().timeIntervalSince1970 + expiration)
}
func get(key: Key) -> Value? {
guard let (value, expiration) = cache[key], expiration > Date().timeIntervalSince1970 else {
return nil
}
return value
}
subscript(key: Key) -> Value? {
get(key: key)
}
}
```get(key: key) // expected '{' to start getter definitionThread.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)!
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let encryptedByte = byte ^ key.utf8.first!
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for byte in data {
let decryptedByte = byte ^ key.utf8.first!
decryptedString.append(String(decryptedByte, encoding:.utf8)
}
}
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)!
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let encryptedByte = byte ^ key.utf8.first!
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
var decryptedString = ""
for byte in data {
let decryptedByte = byte ^ key.utf8.first!
decryptedString.append(String(decryptedByte, encoding:.utf8)
}
}
return decryptedString
}
}
```for (index, byte) in data.enumerated() { // immutable value 'index' was never used; consider replacing with '_' or removing itdecryptedString.append(String(decryptedByte, encoding:.utf8) // no exact matches in call to initializer} // expected ')' in expression listreturn decryptedString // expected declaration} // extraneous '}' at top levelprotocol 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 stringData = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = stringData.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(_ other: Data) -> Data {
var result = self
let otherBytes = other.bytes
for i in 0..<self.count {
result.bytes[i] = self.bytes[i] ^ otherBytes[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 stringData = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = stringData.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(_ other: Data) -> Data {
var result = self
let otherBytes = other.bytes
for i in 0..<self.count {
result.bytes[i] = self.bytes[i] ^ otherBytes[i]
}
}
return result
}
}
```let otherBytes = other.bytes // value of type 'Data' has no member 'bytes'result.bytes[i] = self.bytes[i] ^ otherBytes[i] // value of type 'Data' has no member 'bytes'result.bytes[i] = self.bytes[i] ^ otherBytes[i] // value of type 'Data' has no member 'bytes'return result // expected declaration} // extraneous '}' at top levelprotocol 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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedString.append(String(decryptedByte, encoding:.utf8)
}
}
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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedString = ""
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedString.append(String(decryptedByte, encoding:.utf8)
}
}
return decryptedString
}
}
```decryptedString.append(String(decryptedByte, encoding:.utf8) // no exact matches in call to initializer} // expected ')' in expression listreturn decryptedString // expected declaration} // extraneous '}' at top levelprotocol 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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```return String(data: decryptedData, encoding:.utf8)! // expected declaration} // extraneous '}' at top levelprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
return data.xor(key.data(using:.utf8)!)
}
func decrypt(_ data: Data, _ key: String) -> String {
let decryptedData = data.xor(key.data(using:.utf8)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(_ other: Data) -> Data {
var result = self
var other = other
guard other.count > 0 else { return result }
for i in 0..<result.count {
result.mutableBytes[i] = result.bytes[i] ^ other.bytes[i % other.count]
}
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)!
return data.xor(key.data(using:.utf8)!)
}
func decrypt(_ data: Data, _ key: String) -> String {
let decryptedData = data.xor(key.data(using:.utf8)
return String(data: decryptedData, encoding:.utf8)!
}
}
extension Data {
func xor(_ other: Data) -> Data {
var result = self
var other = other
guard other.count > 0 else { return result }
for i in 0..<result.count {
result.mutableBytes[i] = result.bytes[i] ^ other.bytes[i % other.count]
}
return result
}
}
```let decryptedData = data.xor(key.data(using:.utf8) // value of optional type 'Data?' must be unwrapped to a value of type 'Data'return String(data: decryptedData, encoding:.utf8)! // expected ')' in expression listresult.mutableBytes[i] = result.bytes[i] ^ other.bytes[i % other.count] // value of type 'Data' has no member 'bytes'result.mutableBytes[i] = result.bytes[i] ^ other.bytes[i % other.count] // value of type 'Data' has no member 'mutableBytes'result.mutableBytes[i] = result.bytes[i] ^ other.bytes[i % other.count] // value of type 'Data' has no member 'bytes'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```return String(data: decryptedData, encoding:.utf8)! // expected declaration} // extraneous '}' at top levelprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
return Data(bytes: data.map { $0 ^ key.utf8.first! })
}
func decrypt(_ data: Data, _ key: String) -> String {
let bytes = data.map { $0 ^ key.utf8.first! }
return String(data: bytes, 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)!
return Data(bytes: data.map { $0 ^ key.utf8.first! })
}
func decrypt(_ data: Data, _ key: String) -> String {
let bytes = data.map { $0 ^ key.utf8.first! }
return String(data: bytes, encoding:.utf8)!
}
}
```return Data(bytes: data.map { $0 ^ key.utf8.first! }) // 'init(bytes:)' is deprecated: use `init(_:)` insteadreturn String(data: bytes, encoding:.utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let bytes = string.data(using:.utf8)!
let keyBytes = key.data(using:.utf8)!
var encryptedBytes = [UInt8](repeating: 0, count: bytes.count)
for i in 0..<bytes.count {
encryptedBytes[i] = bytes[i] ^ keyBytes[i % keyBytes.count]
}
return Data(bytes: encryptedBytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let bytes = data.bytes
let keyBytes = key.data(using:.utf8)!
var decryptedBytes = [UInt8](repeating: 0, count: bytes.count)
for i in 0..<bytes.count {
decryptedBytes[i] = bytes[i] ^ keyBytes[i % keyBytes.count]
}
return String(data: Data(bytes: decryptedBytes), 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 bytes = string.data(using:.utf8)!
let keyBytes = key.data(using:.utf8)!
var encryptedBytes = [UInt8](repeating: 0, count: bytes.count)
for i in 0..<bytes.count {
encryptedBytes[i] = bytes[i] ^ keyBytes[i % keyBytes.count]
}
return Data(bytes: encryptedBytes)
}
func decrypt(_ data: Data, _ key: String) -> String {
let bytes = data.bytes
let keyBytes = key.data(using:.utf8)!
var decryptedBytes = [UInt8](repeating: 0, count: bytes.count)
for i in 0..<bytes.count {
decryptedBytes[i] = bytes[i] ^ keyBytes[i % keyBytes.count]
}
return String(data: Data(bytes: decryptedBytes), encoding:.utf8)!
}
}
```return Data(bytes: encryptedBytes) // 'init(bytes:)' is deprecated: use `init(_:)` insteadlet bytes = data.bytes // value of type 'Data' has no member 'bytes'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
var encryptedData = Data()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```return String(data: decryptedData, encoding:.utf8)! // expected declaration} // extraneous '}' at top levelprotocol 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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
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()
for i in 0..<data.count {
let encryptedByte = data[i] ^ keyData[i % keyData.count]
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data()
for i in 0..<data.count {
let decryptedByte = data[i] ^ keyData[i % keyData.count]
decryptedData.append(decryptedByte)
}
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```return String(data: decryptedData, encoding:.utf8)! // expected declaration} // extraneous '}' at top levelprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
return false
}
}
}
lastRequestTime = currentTime
requestCount += 1
return requestCount <= maxRequests
}
}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 requestCount: Int = 0
private var lastRequestTime: Date?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
return false
}
}
}
lastRequestTime = currentTime
requestCount += 1
return requestCount <= maxRequests
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'lastRequestTime = currentTime // cannot find 'currentTime' in scopelastRequestTime = currentTime // expected 'var' keyword in property declarationrequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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'lastRequestTime = currentTime // expected 'var' keyword in property declarationlastRequestTime = currentTime // cannot find 'currentTime' in scoperequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
} else {
requestCount += 1
lastRequestTime = currentTime
return true
}
} else {
requestCount = 1
lastRequestTime = currentTime
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
} else {
requestCount += 1
lastRequestTime = currentTime
return true
}
} else {
requestCount = 1
lastRequestTime = currentTime
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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'lastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' is a 'let' constantlastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' 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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeIntervalSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeInterval < timeIntervalSinceLastRequest {
lastRequestTime = currentTime
requestCount = 1
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
if requestCount < maxRequests {
requestCount += 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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeIntervalSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeInterval < timeIntervalSinceLastRequest {
lastRequestTime = currentTime
requestCount = 1
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
if requestCount < maxRequests {
requestCount += 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'lastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' 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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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'lastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' is a 'let' constantlastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' 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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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'lastRequestTime = currentTime // expected 'var' keyword in property declarationlastRequestTime = currentTime // cannot find 'currentTime' in scoperequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
} else {
requestCount += 1
lastRequestTime = currentTime
return true
}
} else {
requestCount = 1
lastRequestTime = currentTime
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
} else {
requestCount += 1
lastRequestTime = currentTime
return true
}
} else {
requestCount = 1
lastRequestTime = currentTime
return true
}
} else {
lastRequestTime = currentTime
requestCount = 1
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'lastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' is a 'let' constantlastRequestTime = currentTime // cannot assign to value: 'lastRequestTime' 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
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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 {
let maxRequests: Int
let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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'lastRequestTime = currentTime // expected 'var' keyword in property declarationlastRequestTime = currentTime // cannot find 'currentTime' in scoperequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
return false
}
}
}
lastRequestTime = currentTime
requestCount += 1
return requestCount <= maxRequests
}
}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 requestCount: Int = 0
private var lastRequestTime: Date?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
return false
}
}
}
lastRequestTime = currentTime
requestCount += 1
return requestCount <= maxRequests
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'lastRequestTime = currentTime // cannot find 'currentTime' in scopelastRequestTime = currentTime // expected 'var' keyword in property declarationrequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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: Date?
private var requestCount: Int = 0
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeDifference = currentTime.timeIntervalSince(lastRequestTime)
if timeDifference < timeInterval {
if requestCount >= maxRequests {
return false
}
} else {
requestCount = 0
}
}
}
lastRequestTime = currentTime
requestCount += 1
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'lastRequestTime = currentTime // expected 'var' keyword in property declarationlastRequestTime = currentTime // cannot find 'currentTime' in scoperequestCount += 1 // expected '(' in argument list of function declarationrequestCount += 1 // expected 'func' keyword in instance method declarationrequestCount += 1 // consecutive declarations on a line must be separated by ';'requestCount += 1 // invalid redeclaration of 'requestCount()'requestCount += 1 // expected declarationrequestCount += 1 // expected '{' in body of function declaration} // extraneous '}' at top levelThread.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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}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 counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}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 counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}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 counter = 0
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
counter = value
}
func increment() {
queue.async {
self.counter += 1
}
}
func currentValue() -> Int {
return counter
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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: "counterQueue", qos:.userInitiated, attributes:.concurrent)
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
private var value: Int
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
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 let queue = DispatchQueue(label: "counterQueue", qos:.userInitiated, attributes:.concurrent)
private var value: Int
init(value: Int) {
self.value = value
}
func increment() {
queue.async {
self.value += 1
}
}
func currentValue() -> Int {
return value
}
}
```init(value: Int) { // 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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let nextPipeline = Pipeline<U>(value: transform(self.value))
self.transforms.append(transform)
return nextPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let nextPipeline = Pipeline<U>(value: transform(self.value))
self.transforms.append(transform)
return nextPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'self.transforms.append(transform) // cannot convert value of type '(T) -> U' to expected argument type '(T) -> T'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline(value: U())
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline(value: U())
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'transforms.append(transform) // cannot convert value of type '(T) -> U' to expected argument type '(T) -> T'return Pipeline(value: U()) // cannot convert return expression of type 'Pipeline<T>' to return type 'Pipeline<U>'return Pipeline(value: U()) // type 'U' has no member 'init'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U?)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T?)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')return result // expected declaration} // extraneous '}' at top levelprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
transforms.append(transform)
return Pipeline<U>(value: transform(value))
}
func execute() -> T {
var result = value
for transform in transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'transforms.append(transform) // cannot convert value of type '(T) -> U' to expected argument type '(T) -> T'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U?)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T?)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')return result // expected declaration} // extraneous '}' at top levelprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let nextPipeline = Pipeline<U>(value: transform(self.value))
self.transforms.append(transform)
return nextPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let nextPipeline = Pipeline<U>(value: transform(self.value))
self.transforms.append(transform)
return nextPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}
// Example usage
let pipeline = Pipeline(value: 1)
.pipe { $0 + 2 }
.pipe { $0 * 3 }
.pipe { String($0) }
let finalResult = pipeline.execute()
print(finalResult) // Output: "9"
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'self.transforms.append(transform) // cannot convert value of type '(T) -> U' to expected argument type '(T) -> T'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
result = transform(result)
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}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 {
private let value: T
private var transforms: [((T) -> T?)] = []
init(value: T) {
self.value = value
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newPipeline = Pipeline<U>(value: transform(self.value))
newPipeline.transforms = self.transforms + [transform]
return newPipeline
}
func execute() -> T {
var result = self.value
for transform in self.transforms {
if let transformed = transform(result) {
result = transformed
} else {
break
}
}
}
return result
}
}
```init(value: T) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<T>'newPipeline.transforms = self.transforms + [transform] // cannot assign value of type 'IndexPath' to type '[((U) -> U?)]'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '[((T) -> T?)]' to expected argument type 'IndexPath'newPipeline.transforms = self.transforms + [transform] // cannot convert value of type '(T) -> U' to expected element type 'IndexPath.ArrayLiteralElement' (aka 'Int')return result // expected declaration} // extraneous '}' at top levelprotocol 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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
for observer in observers.values {
observer(newValue)
}
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if value!= newValue { // use of '=' in a boolean context, did you mean '=='?if value!= newValue { // cannot force unwrap value of non-optional type 'Value'if value!= newValue { // '=' must have consistent whitespace on both sidesprotocol 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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
func updateValue(_ newValue: Value) {
value = newValue
for observer in observers.values {
observer(value)
}
}
}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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
func updateValue(_ newValue: Value) {
value = newValue
for observer in observers.values {
observer(value)
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
for observer in observers.values {
observer(newValue)
}
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if value!= newValue { // use of '=' in a boolean context, did you mean '=='?if value!= newValue { // cannot force unwrap value of non-optional type 'Value'if value!= newValue { // '=' must have consistent whitespace on both sidesprotocol 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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return self.value
}
set {
self.value = newValue
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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return self.value
}
set {
self.value = newValue
for observer in observers.values {
observer(newValue)
}
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'} // extraneous '}' at top levelprotocol 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 value: Value
private var observers = [UUID: (Value) -> Void]()
private var currentUUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = currentUUID
observers[uuid] = observer
currentUUID = UUID()
observer(value)
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}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 value: Value
private var observers = [UUID: (Value) -> Void]()
private var currentUUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = currentUUID
observers[uuid] = observer
currentUUID = UUID()
observer(value)
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
private var value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
for observer in observers.values {
observer(newValue)
}
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if value!= newValue { // use of '=' in a boolean context, did you mean '=='?if value!= newValue { // cannot force unwrap value of non-optional type 'Value'if value!= newValue { // '=' must have consistent whitespace on both sidesprotocol 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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
func updateValue(_ newValue: Value) {
value = newValue
for observer in observers.values {
observer(value)
}
}
}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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
func updateValue(_ newValue: Value) {
value = newValue
for observer in observers.values {
observer(value)
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> {
private var value: Value
private var observers = [UUID: (Value) -> Void]()
init(value: Value) {
self.value = value
}
var observableValue: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
notifyObservers()
}
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
for observer in observers.values {
observer(value)
}
}
}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> {
private var value: Value
private var observers = [UUID: (Value) -> Void]()
init(value: Value) {
self.value = value
}
var observableValue: Value {
get {
return value
}
set {
if value!= newValue {
value = newValue
notifyObservers()
}
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
private func notifyObservers() {
for observer in observers.values {
observer(value)
}
}
}
```if value!= newValue { // '=' must have consistent whitespace on both sidesif value!= newValue { // use of '=' in a boolean context, did you mean '=='?if value!= newValue { // cannot force unwrap value of non-optional type 'Value'observable.value = 10 // 'value' is inaccessible due to 'private' protection levelobservable.value = 20 // 'value' is inaccessible due to 'private' protection levelobservable.value = 30 // 'value' is inaccessible due to 'private' protection levelprotocol 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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}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 value: Value
private var observers: [UUID: (Value) -> Void] = [:]
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
self.wrappedValue = self.clampedValue
}
var clampedValue: Value {
get {
return wrappedValue.clamp(in: range)
}
set {
wrappedValue = newValue.clamp(in: range)
}
}
}
extension Clamped where Value == Int {
init(wrappedValue: Int, _ range: ClosedRange<Int>) {
precondition(range.lowerBound <= range.upperBound, "lowerBound must be less than or equal to upperBound")
self.wrappedValue =.init(wrappedValue: wrappedValue, _ range)
}
}
extension Clamped where Value == Float {
init(wrappedValue: Float, _ range: ClosedRange<Float>) {
self.init(wrappedValue: wrappedValue, _ range)
}
}
extension Clamp where Value == Double {
init(wrappedValue: Double, _ range: ClosedRange<Double>) {
self.init(wrappedValue: wrappedValue, _ 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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
self.wrappedValue = self.clampedValue
}
var clampedValue: Value {
get {
return wrappedValue.clamp(in: range)
}
set {
wrappedValue = newValue.clamp(in: range)
}
}
}
extension Clamped where Value == Int {
init(wrappedValue: Int, _ range: ClosedRange<Int>) {
precondition(range.lowerBound <= range.upperBound, "lowerBound must be less than or equal to upperBound")
self.wrappedValue =.init(wrappedValue: wrappedValue, _ range)
}
}
extension Clamped where Value == Float {
init(wrappedValue: Float, _ range: ClosedRange<Float>) {
self.init(wrappedValue: wrappedValue, _ range)
}
}
extension Clamp where Value == Double {
init(wrappedValue: Double, _ range: ClosedRange<Double>) {
self.init(wrappedValue: wrappedValue, _ range)
}
}
```return wrappedValue.clamp(in: range) // value of type 'Value' has no member 'clamp'wrappedValue = newValue.clamp(in: range) // value of type 'Value' has no member 'clamp'self.wrappedValue =.init(wrappedValue: wrappedValue, _ range) // '_' can only appear in a pattern or on the left side of an assignmentself.wrappedValue =.init(wrappedValue: wrappedValue, _ range) // '=' must have consistent whitespace on both sidesself.wrappedValue =.init(wrappedValue: wrappedValue, _ range) // expected ',' separatorself.init(wrappedValue: wrappedValue, _ range) // expected ',' separatorself.init(wrappedValue: wrappedValue, _ range) // '_' can only appear in a pattern or on the left side of an assignmentextension Clamp where Value == Double { // cannot find type 'Clamp' in scopeself.init(wrappedValue: wrappedValue, _ range) // expected ',' separatorvalue = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value must be within the specified range")
}
var projectedValue: Value {
get {
return wrappedValue
}
set {
wrappedValue = newValue
}
}
mutating func project(value: Value) -> Value {
if range.contains(value) {
wrappedValue = value
} else {
wrappedValue = value.clamp(to: range)
}
return wrappedValue
}
}
extension Clamped where Value == Int {
mutating func project(value: Double) -> Int {
return Int(value.clamp(to: range))
}
}
extension Clamp where Value == Double {
mutating func project(value: Int) -> Double {
return Double(value.clamp(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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value must be within the specified range")
}
var projectedValue: Value {
get {
return wrappedValue
}
set {
wrappedValue = newValue
}
}
mutating func project(value: Value) -> Value {
if range.contains(value) {
wrappedValue = value
} else {
wrappedValue = value.clamp(to: range)
}
return wrappedValue
}
}
extension Clamped where Value == Int {
mutating func project(value: Double) -> Int {
return Int(value.clamp(to: range))
}
}
extension Clamp where Value == Double {
mutating func project(value: Int) -> Double {
return Double(value.clamp(to: range))
}
}
```wrappedValue = value.clamp(to: range) // value of type 'Value' has no member 'clamp'return Int(value.clamp(to: range)) // value of type 'Double' has no member 'clamp'extension Clamp where Value == Double { // cannot find type 'Clamp' in scopevalue = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the specified range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the clamped range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the clamped range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value must be within the specified range.")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value must be within the specified range.")
}
var projectedValue: Value {
get { return wrappedValue }
set {
if newValue < range.lowerBound {
wrappedValue = range.lowerBound
} else if newValue > range.upperBound {
wrappedValue = range.upperBound
} else {
wrappedValue = newValue
}
}
}
}
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get {
return wrappedValue
}
set {
wrappedValue = newValue
}
}
}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 {
private(set) var wrappedValue: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.wrappedValue = wrappedValue
self.range = range
assert(range.contains(wrappedValue), "Initial value is outside the range")
}
var projectedValue: Value {
get {
return wrappedValue
}
set {
wrappedValue = newValue
}
}
}
// Example usage
let min = 1
let max = 10
let clamped = Clamped(wrappedValue: 5, min...max)
print(clamped) // Output: 5
clamped = 0
print(clamped) // Output: 1
clamped = 15
print(clamped) // Output: 10
```value = 5 // cannot assign to value: 'value' is a get-only propertyvalue = 15 // cannot assign to value: 'value' is a get-only propertyvalue = -5 // cannot assign to value: 'value' is a get-only propertyenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
var example = Example()
example.x // logs "get 0"
example.x = 1 // logs "set 1"
example.x // logs "get 1"
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'private let logger: @escaping (Event, Value) -> Void // @escaping attribute may only be used in function parameter positionvar wrappedValue: Value { // invalid redeclaration of 'wrappedValue'logger(.get, wrappedValue) // cannot infer contextual base in reference to member 'get'logger(.set, newValue) // cannot infer contextual base in reference to member 'set'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
var example = Example()
example.x // 0
example.x = 10
example.x // 10
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'private let logger: @escaping (Event, Value) -> Void // @escaping attribute may only be used in function parameter positionvar wrappedValue: Value { // invalid redeclaration of 'wrappedValue'logger(.get, wrappedValue) // cannot infer contextual base in reference to member 'get'logger(.set, newValue) // cannot infer contextual base in reference to member 'set'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: @escaping (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
var example = Example()
example.x // 0
example.x = 1
example.x // 1
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'private let logger: @escaping (Event, Value) -> Void // @escaping attribute may only be used in function parameter positionvar wrappedValue: Value { // invalid redeclaration of 'wrappedValue'logger(.get, wrappedValue) // cannot infer contextual base in reference to member 'get'logger(.set, newValue) // cannot infer contextual base in reference to member 'set'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: @escaping (Event, Value) -> Void
private var value: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}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> {
private let logger: @escaping (Event, Value) -> Void
private var value: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
```private let logger: @escaping (Event, Value) -> Void // @escaping attribute may only be used in function parameter positionlogger(.get, value) // cannot infer contextual base in reference to member 'get'logger(.set, newValue) // cannot infer contextual base in reference to member 'set'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var value: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var value: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
var example = Example()
example.x // 0
example.x = 10
example.x // 10
```private var wrappedValue: Value // private property 'wrappedValue' cannot have more restrictive access than its enclosing property wrapper type 'Logged' (which is internal)enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
var example = Example()
example.x // 0
example.x = 1
example.x // 1
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x = 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> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x = 0
}
var example = Example()
example.x // 0
example.x = 1
example.x // 1
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var value: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}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> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var value: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
```private var wrappedValue: Value // private property 'wrappedValue' cannot have more restrictive access than its enclosing property wrapper type 'Logged' (which is internal)enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 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> {
private let logger: (Event, Value) -> Void
private var wrappedValue: Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
struct Example {
@Logged var x: Int = 0
}
let example = Example()
example.x // 0
example.x = 1
example.x // 1
```struct Logged<Value> { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private let logger: @escaping (Event, Value) -> Void
var wrappedValue: Value {
get {
logger(.get, self.wrappedValue)
return self.wrappedValue
}
set {
logger(.set, newValue)
self.wrappedValue = newValue
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
struct Example {
@Logged({ event, value in
print("Event: \(event), value: \(value)")
}) var x = 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> {
private let logger: @escaping (Event, Value) -> Void
var wrappedValue: Value {
get {
logger(.get, self.wrappedValue)
return self.wrappedValue
}
set {
logger(.set, newValue)
self.wrappedValue = newValue
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
struct Example {
@Logged({ event, value in
print("Event: \(event), value: \(value)")
}) var x = 0
}
let example = Example()
example.x
example.x = 1
```private let logger: @escaping (Event, Value) -> Void // @escaping attribute may only be used in function parameter positionlogger(.get, self.wrappedValue) // cannot infer contextual base in reference to member 'get'logger(.set, newValue) // cannot infer contextual base in reference to member 'set'@Logged({ event, value in // missing argument label 'logger:' in callprotocol 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
case.keyboardDeleteBackwards:
// Handle delete backwards
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 character selection
case.keyboardDeleteBackwards:
// Handle delete backwards
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):
// Add character to search bar
case.keyboardDeleteBackwards:
// Remove last character from search bar
case.searchButtonPress:
// Get forecast for search bar text
do {
let city = // Get search bar text
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.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
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// Add character to search bar
case.keyboardDeleteBackwards:
// Remove last character from search bar
case.searchButtonPress:
// Get forecast for search bar text
do {
let city = // Get search bar text
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.failure(city: city)
}
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.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 statementlet city = // Get search bar text // expected initial value after '='return ApplicationFeedback.failure(city: city) // cannot find 'city' in scopeprotocol 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):
// fill search bar with character
case.keyboardDeleteBackwards:
// delete last character from search bar
case.searchButtonPress:
// check forecast for city in search bar
do {
let city = // get city from search bar
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.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
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// fill search bar with character
case.keyboardDeleteBackwards:
// delete last character from search bar
case.searchButtonPress:
// check forecast for city in search bar
do {
let city = // get city from search bar
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.failure(city: city)
}
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.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 statementlet city = // get city from search bar // expected initial value after '='return ApplicationFeedback.failure(city: city) // cannot find 'city' in scopeprotocol 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):
// TODO: fill search bar results
case.keyboardDeleteBackwards:
// TODO: handle delete backwards
case.searchButtonPress:
// TODO: use WeatherProvider to check forecast
}
}
}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):
// TODO: fill search bar results
case.keyboardDeleteBackwards:
// TODO: handle delete backwards
case.searchButtonPress:
// TODO: use WeatherProvider to check forecast
}
}
}
```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):
// fill search bar results
case.keyboardDeleteBackwards:
// handle delete backwards
case.searchButtonPress:
// use WeatherProvider to check forecast
}
}
}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):
// fill search bar results
case.keyboardDeleteBackwards:
// handle delete backwards
case.searchButtonPress:
// use WeatherProvider to check forecast
}
}
}
```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 input
case.keyboardDeleteBackwards:
// Handle delete 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 character input
case.keyboardDeleteBackwards:
// Handle delete 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):
// TODO: fill search bar with character
case.keyboardDeleteBackwards:
// TODO: delete last character from search bar
case.searchButtonPress:
// TODO: get forecast for city in search bar and show it
}
}
}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):
// TODO: fill search bar with character
case.keyboardDeleteBackwards:
// TODO: delete last character from search bar
case.searchButtonPress:
// TODO: get forecast for city in search bar and show it
}
}
}
```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):
// fill search bar with character
case.keyboardDeleteBackwards:
// delete last character from search bar
case.searchButtonPress:
// use WeatherProvider to check forecast
do {
let city = // get city from search bar
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.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
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
// fill search bar with character
case.keyboardDeleteBackwards:
// delete last character from search bar
case.searchButtonPress:
// use WeatherProvider to check forecast
do {
let city = // get city from search bar
let forecast = try provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.failure(city: city)
}
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case.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 statementlet city = // get city from search bar // expected initial value after '='return ApplicationFeedback.failure(city: city) // cannot find 'city' in scopeprotocol 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 let.keyboardCharacterSelect(character):
// fill search bar results
return nil
case.keyboardDeleteBackwards:
// handle delete backwards
return nil
case.searchButtonPress:
// check forecast
do {
let city = "New York"
let forecast = try self.provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.failure(city: "New York")
}
}
}
}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 let.keyboardCharacterSelect(character):
// fill search bar results
return nil
case.keyboardDeleteBackwards:
// handle delete backwards
return nil
case.searchButtonPress:
// check forecast
do {
let city = "New York"
let forecast = try self.provider.forecast(for: city)
return ApplicationFeedback.success(city: city, forecast: forecast)
} catch {
return ApplicationFeedback.failure(city: "New York")
}
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case let.keyboardCharacterSelect(character): // immutable value 'character' was never used; consider replacing with '_' or removing itprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case let.keyboardCharacterSelect(character):
// TODO: fill search bar results
case.keyboardDeleteBackwards:
// TODO: handle delete backwards
case.searchButtonPress:
// TODO: use WeatherProvider to check forecast
}
}
}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 let.keyboardCharacterSelect(character):
// TODO: fill search bar results
case.keyboardDeleteBackwards:
// TODO: handle delete backwards
case.searchButtonPress:
// TODO: use WeatherProvider to check forecast
}
}
}
```init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'case let.keyboardCharacterSelect(character): // 'case' label in a 'switch' must have at least one executable statementcase let.keyboardCharacterSelect(character): // immutable value 'character' was never used; consider replacing with '_' or removing itcase.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 statement