Metadata
| Key | Value |
|---|---|
| engine | mistral |
| prompt | instruct |
| 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)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
import Foundation
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}```swift
import Foundation
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using: .utf8) else {
throw ParsingError.invalidInput
}
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
return json
} else {
throw ParsingError.internalError(ParsingError.invalidInput)
}
} catch {
throw ParsingError.internalError(error)
}
}
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}
```
This function takes an `HTMLNode` and recursively generates the corresponding HTML string. It uses pattern matching to handle both text and element nodes. For text nodes, it simply returns the content. For element nodes, it generates the opening tag with attributes (if any), recursively generates the children HTML, and then closes the tag.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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}
```
This code defines an enum `HTMLNode` that represents either a text node or an element node in an HTML tree. The `generate` function takes an `HTMLNode` and recursively generates the corresponding HTML string. For text nodes, it simply returns the content. For element nodes, it generates the opening tag, recursively generates the children HTML, and then generates the closing tag. The attributes are also included in the opening tag.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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}
```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):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenHTML)</\(name)>"
}
}
```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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}
```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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenString)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenString)</\(name)>"
}
}
```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):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenHTML)</\(name)>"
}
}
```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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenHTML = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenHTML)</\(name)>"
}
}
```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):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```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):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenString)</\(name)>"
}
}```swift
func generate(_ tree: HTMLNode) -> String {
switch tree {
case .text(let content):
return content
case .element(let name, let attributes, let children):
let attributeString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined()
return "<\(name) \(attributeString)>\(childrenString)</\(name)>"
}
}
// Example usage:
let tree: HTMLNode = .element("div", children: [
.element("a", attributes: ["href": "swifteval"], children: [
.text("Link text")
])
])
let htmlString = generate(tree)
print(htmlString) // Output: "<div><a href=\"swifteval\">Link text</a></div>"
```enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
var numbers: [Double] = []
var operations: [Character] = []
while let match = numberRegex.firstMatch(in: string, options: [], range: numberRange) {
if let range = Range(match.range, in: string) {
if let number = Double(string[range]) {
numbers.append(number)
}
}
string = string.replacingCharacters(in: match.range, with: "")
}
for operation in ["*", "/"] {
while let index = string.firstIndex(of: Character(operation)) {
let left = numbers.remove(at: index.predecessor)
let right = numbers.remove(at: index)
let result: Double
switch operation {
case "*":
result = left * right
case "/":
result = left / right
default:
throw CalculateError.invalidInput
}
numbers.insert(result, at: index.predecessor)
string.remove(at: index)
}
}
for operation in ["+", "-"] {
while let index = string.firstIndex(of: Character(operation)) {
let left = numbers.remove(at: index.predecessor)
let right = numbers.remove(at: index)
let result: Double
switch operation {
case "+":
result = left + right
case "-":
result = left - right
default:
throw CalculateError.invalidInput
}
numbers.insert(result, at: index.predecessor)
string.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}```swift
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
var numbers: [Double] = []
var operations: [Character] = []
while let match = numberRegex.firstMatch(in: string, options: [], range: numberRange) {
if let range = Range(match.range, in: string) {
if let number = Double(string[range]) {
numbers.append(number)
}
}
string = string.replacingCharacters(in: match.range, with: "")
}
for operation in ["*", "/"] {
while let index = string.firstIndex(of: Character(operation)) {
let left = numbers.remove(at: index.predecessor)
let right = numbers.remove(at: index)
let result: Double
switch operation {
case "*":
result = left * right
case "/":
result = left / right
default:
throw CalculateError.invalidInput
}
numbers.insert(result, at: index.predecessor)
string.remove(at: index)
}
}
for operation in ["+", "-"] {
while let index = string.firstIndex(of: Character(operation)) {
let left = numbers.remove(at: index.predecessor)
let right = numbers.remove(at: index)
let result: Double
switch operation {
case "+":
result = left + right
case "-":
result = left - right
default:
throw CalculateError.invalidInput
}
numbers.insert(result, at: index.predecessor)
string.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}
```string = string.replacingCharacters(in: match.range, with: "") // instance method 'replacingCharacters(in:with:)' requires that 'NSRange' (aka '_NSRange') conform to 'RangeExpression'let left = numbers.remove(at: index.predecessor) // value of type 'String.Index' has no member 'predecessor'let right = numbers.remove(at: index) // cannot convert value of type 'String.Index' to expected argument type 'Int'result = left * right // cannot assign value of type 'Duration' to type 'Double'result = left / right // cannot assign value of type 'Duration' to type 'Double'numbers.insert(result, at: index.predecessor) // value of type 'String.Index' has no member 'predecessor'let left = numbers.remove(at: index.predecessor) // value of type 'String.Index' has no member 'predecessor'let right = numbers.remove(at: index) // cannot convert value of type 'String.Index' to expected argument type 'Int'result = left + right // cannot assign value of type 'String' to type 'Double'result = left - right // cannot assign value of type 'Duration' to type 'Double'numbers.insert(result, at: index.predecessor) // value of type 'String.Index' has no member 'predecessor'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let range = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: range).map {
Double(String(string[Range($0.range, in: string)!]))!
}
let regex = try NSRegularExpression(pattern: "[+\\-*/()]")
let matches = regex.matches(in: string, options: [], range: range).map {
String(string[Range($0.range, in: string)!])
}
var result = numbers.first!
numbers.removeFirst()
for (index, operation) in matches.enumerated() {
let number = numbers[index]
switch operation {
case "+":
result += number
case "-":
result -= number
case "*":
result *= number
case "/":
guard number != 0 else { throw CalculateError.invalidInput }
result /= number
default:
break
}
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let range = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: range).map {
Double(String(string[Range($0.range, in: string)!]))!
}
let regex = try NSRegularExpression(pattern: "[+\\-*/()]")
let matches = regex.matches(in: string, options: [], range: range).map {
String(string[Range($0.range, in: string)!])
}
var result = numbers.first!
numbers.removeFirst()
for (index, operation) in matches.enumerated() {
let number = numbers[index]
switch operation {
case "+":
result += number
case "-":
result -= number
case "*":
result *= number
case "/":
guard number != 0 else { throw CalculateError.invalidInput }
result /= number
default:
break
}
}
return result
}
```numbers.removeFirst() // cannot use mutating member on immutable value: 'numbers' is a 'let' constantenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberSet = CharacterSet(charactersIn: "0123456789.")
let operationSet = CharacterSet(charactersIn: "+-*/()")
var operationStack = [String]()
var numberStack = [Double]()
while !string.isEmpty {
let number = string.commonPrefix(with: string.range(of: numberSet, options: .regularExpression)!)
if !number.isEmpty {
numberStack.append(Double(number)!)
string.removeFirst(number.count)
continue
}
let operation = string.commonPrefix(with: string.range(of: operationSet)!)
if !operation.isEmpty {
if operation == "(" {
operationStack.append(operation)
} else if operation == ")" {
while let lastOperation = operationStack.last, lastOperation != "(" {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
if operationStack.isEmpty {
throw CalculateError.invalidInput
}
operationStack.removeLast()
} else {
while let lastOperation = operationStack.last, precedence(of: lastOperation) >= precedence(of: operation) {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
operationStack.append(operation)
}
string.removeFirst(operation.count)
continue
}
throw CalculateError.invalidInput
}
while let lastOperation = operationStack.last, lastOperation != "(" {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
if numberStack.count != 1 {
throw CalculateError.invalidInput
}
return numberStack.first!
}
func precedence(of operation: String) -> Int {
switch operation {
case "+", "-":
return 1
case "*", "/":
return 2
default:
return 0
}
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberSet = CharacterSet(charactersIn: "0123456789.")
let operationSet = CharacterSet(charactersIn: "+-*/()")
var operationStack = [String]()
var numberStack = [Double]()
while !string.isEmpty {
let number = string.commonPrefix(with: string.range(of: numberSet, options: .regularExpression)!)
if !number.isEmpty {
numberStack.append(Double(number)!)
string.removeFirst(number.count)
continue
}
let operation = string.commonPrefix(with: string.range(of: operationSet)!)
if !operation.isEmpty {
if operation == "(" {
operationStack.append(operation)
} else if operation == ")" {
while let lastOperation = operationStack.last, lastOperation != "(" {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
if operationStack.isEmpty {
throw CalculateError.invalidInput
}
operationStack.removeLast()
} else {
while let lastOperation = operationStack.last, precedence(of: lastOperation) >= precedence(of: operation) {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
operationStack.append(operation)
}
string.removeFirst(operation.count)
continue
}
throw CalculateError.invalidInput
}
while let lastOperation = operationStack.last, lastOperation != "(" {
if numberStack.count < 2 {
throw CalculateError.invalidInput
}
let right = numberStack.popLast()!
let left = numberStack.popLast()!
switch lastOperation {
case "+":
numberStack.append(left + right)
case "-":
numberStack.append(left - right)
case "*":
numberStack.append(left * right)
case "/":
numberStack.append(left / right)
default:
break
}
operationStack.removeLast()
}
if numberStack.count != 1 {
throw CalculateError.invalidInput
}
return numberStack.first!
}
func precedence(of operation: String) -> Int {
switch operation {
case "+", "-":
return 1
case "*", "/":
return 2
default:
return 0
}
}
```let number = string.commonPrefix(with: string.range(of: numberSet, options: .regularExpression)!) // instance method 'commonPrefix(with:options:)' requires that 'Range<String.Index>' conform to 'StringProtocol'let number = string.commonPrefix(with: string.range(of: numberSet, options: .regularExpression)!) // instance method 'range(of:options:range:locale:)' requires that 'CharacterSet' conform to 'StringProtocol'let operation = string.commonPrefix(with: string.range(of: operationSet)!) // instance method 'commonPrefix(with:options:)' requires that 'Range<String.Index>' conform to 'StringProtocol'let operation = string.commonPrefix(with: string.range(of: operationSet)!) // instance method 'range(of:options:range:locale:)' requires that 'CharacterSet' conform to 'StringProtocol'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberSet = CharacterSet(charactersIn: "0123456789.")
let operationSet = CharacterSet(charactersIn: "+-*/()")
var operationStack: [Double] = []
var operationPrecedence: [String: Int] = ["+" : 1, "-" : 1, "*" : 2, "/" : 2]
while !string.isEmpty {
if let number = Double(string.prefix(while: { numberSet.contains($0) })) {
operationStack.append(number)
string = String(string.dropFirst(number.description.count))
} else if let operation = string.first, operationSet.contains(operation) {
if operation == ")" {
while let lastOperation = operationStack.last, lastOperation != "(" {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
if let lastOperation = operationStack.popLast(), lastOperation == "(" {
operationStack.removeLast()
}
} else if operation == "(" {
operationStack.append(contentsOf: ["(", 0])
} else {
while let lastOperation = operationStack.last, operationPrecedence[String(operation)] ?? 0 <= (operationPrecedence[String(lastOperation)] ?? 0) {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
operationStack.append(contentsOf: [operation, 0])
}
string = String(string.dropFirst())
} else {
throw CalculateError.invalidInput
}
}
while let lastOperation = operationStack.last, lastOperation != "(" {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
if operationStack.count != 1 {
throw CalculateError.invalidInput
}
return operationStack.first ?? 0
}```swift
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberSet = CharacterSet(charactersIn: "0123456789.")
let operationSet = CharacterSet(charactersIn: "+-*/()")
var operationStack: [Double] = []
var operationPrecedence: [String: Int] = ["+" : 1, "-" : 1, "*" : 2, "/" : 2]
while !string.isEmpty {
if let number = Double(string.prefix(while: { numberSet.contains($0) })) {
operationStack.append(number)
string = String(string.dropFirst(number.description.count))
} else if let operation = string.first, operationSet.contains(operation) {
if operation == ")" {
while let lastOperation = operationStack.last, lastOperation != "(" {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
if let lastOperation = operationStack.popLast(), lastOperation == "(" {
operationStack.removeLast()
}
} else if operation == "(" {
operationStack.append(contentsOf: ["(", 0])
} else {
while let lastOperation = operationStack.last, operationPrecedence[String(operation)] ?? 0 <= (operationPrecedence[String(lastOperation)] ?? 0) {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
operationStack.append(contentsOf: [operation, 0])
}
string = String(string.dropFirst())
} else {
throw CalculateError.invalidInput
}
}
while let lastOperation = operationStack.last, lastOperation != "(" {
if let rightOperand = operationStack.popLast(), let leftOperand = operationStack.popLast() {
switch lastOperation {
case "+":
operationStack.append(leftOperand + rightOperand)
case "-":
operationStack.append(leftOperand - rightOperand)
case "*":
operationStack.append(leftOperand * rightOperand)
case "/":
operationStack.append(leftOperand / rightOperand)
default:
break
}
}
}
if operationStack.count != 1 {
throw CalculateError.invalidInput
}
return operationStack.first ?? 0
}
```if let number = Double(string.prefix(while: { numberSet.contains($0) })) { // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'Unicode.Scalar'} else if let operation = string.first, operationSet.contains(operation) { // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'Unicode.Scalar'while let lastOperation = operationStack.last, lastOperation != "(" { // cannot convert value of type 'String' to expected argument type 'Double'case "+": // expression pattern of type 'String' cannot match values of type 'Double'case "-": // expression pattern of type 'String' cannot match values of type 'Double'case "*": // expression pattern of type 'String' cannot match values of type 'Double'case "/": // expression pattern of type 'String' cannot match values of type 'Double'if let lastOperation = operationStack.popLast(), lastOperation == "(" { // binary operator '==' cannot be applied to operands of type 'Double' and 'String'operationStack.append(contentsOf: ["(", 0]) // cannot convert value of type 'String' to expected element type 'Double'case "+": // expression pattern of type 'String' cannot match values of type 'Double'case "-": // expression pattern of type 'String' cannot match values of type 'Double'case "*": // expression pattern of type 'String' cannot match values of type 'Double'case "/": // expression pattern of type 'String' cannot match values of type 'Double'operationStack.append(contentsOf: [operation, 0]) // cannot convert value of type 'String.Element' (aka 'Character') to expected element type 'Double'while let lastOperation = operationStack.last, lastOperation != "(" { // cannot convert value of type 'String' to expected argument type 'Double'case "+": // expression pattern of type 'String' cannot match values of type 'Double'case "-": // expression pattern of type 'String' cannot match values of type 'Double'case "*": // expression pattern of type 'String' cannot match values of type 'Double'case "/": // expression pattern of type 'String' cannot match values of type 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
string = string.replacingOccurrences(of: "^", with: "**")
let dataFormat = NSData(data: (string as NSString).data(using: String.Encoding.utf8.rawValue)!)
let expression = NSExpression(format: string)
let result = expression.expressionValue(with: nil, context: nil) as! Double
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
string = string.replacingOccurrences(of: "^", with: "**")
let dataFormat = NSData(data: (string as NSString).data(using: String.Encoding.utf8.rawValue)!)
let expression = NSExpression(format: string)
let result = expression.expressionValue(with: nil, context: nil) as! Double
return result
}
```
This code defines a function `calculate` that takes a string as input and returns a double as output. It first removes any spaces from the input string and replaces any caret (^) characters with double asterisks (**) to handle exponentiation. It then uses the `NSExpression` class to parse the string and evaluate the expression. If the input string is invalid, the function throws a `CalculateError.invalidInput` error.let dataFormat = NSData(data: (string as NSString).data(using: String.Encoding.utf8.rawValue)!) // initialization of immutable value 'dataFormat' was never used; consider replacing with assignment to '_' or removing itenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
string = string.replacingOccurrences(of: "^", with: "**")
let regex = try NSRegularExpression(pattern: "[^0-9.+-*/()]", options: [])
let range = NSRange(location: 0, length: string.utf16.count)
if let _ = regex.firstMatch(in: string, options: [], range: range) {
throw CalculateError.invalidInput
}
let expression = NSExpression(format: string)
guard let result = expression.expressionValue(with: nil, context: nil) as? Double else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
string = string.replacingOccurrences(of: "^", with: "**")
let regex = try NSRegularExpression(pattern: "[^0-9.+-*/()]", options: [])
let range = NSRange(location: 0, length: string.utf16.count)
if let _ = regex.firstMatch(in: string, options: [], range: range) {
throw CalculateError.invalidInput
}
let expression = NSExpression(format: string)
guard let result = expression.expressionValue(with: nil, context: nil) as? Double else {
throw CalculateError.invalidInput
}
return result
}
```
This code defines a `calculate` function that takes a string as input and returns a `Double` as output. It first replaces any spaces in the input string with empty characters and replaces any occurrences of "^" with "**" to handle exponentiation. Then it uses a regular expression to check if the input string contains any invalid characters. If it does, it throws a `CalculateError.invalidInput` error. If the input string is valid, it creates an `NSExpression` object from the input string and evaluates it to get the result. If the result is not a `Double`, it throws another `CalculateError.invalidInput` error. Otherwise, it returns the result as a `Double`. // Fatal error: Error raised at top level: Error Domain=NSCocoaErrorDomain Code=2048 "The value “[^0-9.+-*/()]” is invalid." UserInfo={NSInvalidValue=[^0-9.+-*/()]}enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
var numbers: [Double] = []
numberRegex.enumerateMatches(in: string, options: [], range: numberRange) { match, _, _ in
if let match = match, let range = Range(match.range, in: string) {
if let number = Double(string[range]) {
numbers.append(number)
}
}
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
var operations: [Character] = []
operationRegex.enumerateMatches(in: string, options: [], range: numberRange) { match, _, _ in
if let match = match, let range = Range(match.range, in: string) {
let operation = string[range].first!
operations.append(operation)
}
}
guard numbers.count == operations.count + 1 else {
throw CalculateError.invalidInput
}
var result = numbers.removeFirst()
while let operation = operations.first {
operations.removeFirst()
let nextNumber = numbers.removeFirst()
switch operation {
case "+":
result += nextNumber
case "-":
result -= nextNumber
case "*":
result *= nextNumber
case "/":
guard nextNumber != 0 else {
throw CalculateError.invalidInput
}
result /= nextNumber
default:
break
}
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
var numbers: [Double] = []
numberRegex.enumerateMatches(in: string, options: [], range: numberRange) { match, _, _ in
if let match = match, let range = Range(match.range, in: string) {
if let number = Double(string[range]) {
numbers.append(number)
}
}
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
var operations: [Character] = []
operationRegex.enumerateMatches(in: string, options: [], range: numberRange) { match, _, _ in
if let match = match, let range = Range(match.range, in: string) {
let operation = string[range].first!
operations.append(operation)
}
}
guard numbers.count == operations.count + 1 else {
throw CalculateError.invalidInput
}
var result = numbers.removeFirst()
while let operation = operations.first {
operations.removeFirst()
let nextNumber = numbers.removeFirst()
switch operation {
case "+":
result += nextNumber
case "-":
result -= nextNumber
case "*":
result *= nextNumber
case "/":
guard nextNumber != 0 else {
throw CalculateError.invalidInput
}
result /= nextNumber
default:
break
}
}
return result
}
```var string = string.replacingOccurrences(of: " ", with: "") // variable 'string' was never mutated; consider changing to 'let' constant // XCTAssertEqual failed: (8.0) is not equal to (6.0)enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(string[Range($0.range, in: string)!])!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
string[Range($0.range, in: string)!]
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(string[Range($0.range, in: string)!])!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
string[Range($0.range, in: string)!]
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}
```numbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.insert(result, at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.insert(result, at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.insert(result, at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.remove(at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantnumbers.insert(result, at: index) // cannot use mutating member on immutable value: 'numbers' is a 'let' constantenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(String(string[$0.range]))!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
String(string[$0.range])
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(String(string[$0.range]))!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
String(string[$0.range])
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}
```Double(String(string[$0.range]))! // subscript 'subscript(_:)' requires that 'NSRange' (aka '_NSRange') conform to 'RangeExpression'String(string[$0.range]) // subscript 'subscript(_:)' requires that 'NSRange' (aka '_NSRange') conform to 'RangeExpression'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(String(string[$0.range]))!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
String(string[$0.range])
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}```swift
enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
var string = string.replacingOccurrences(of: " ", with: "")
let numberRegex = try NSRegularExpression(pattern: "[0-9]+\\.?[0-9]*")
let numberRange = NSRange(string.startIndex..<string.endIndex, in: string)
let numbers = numberRegex.matches(in: string, options: [], range: numberRange).map {
Double(String(string[$0.range]))!
}
let operationRegex = try NSRegularExpression(pattern: "[+\\-*/]")
let operationRange = NSRange(string.startIndex..<string.endIndex, in: string)
var operations = operationRegex.matches(in: string, options: [], range: operationRange).map {
String(string[$0.range])
}
while operations.contains("*") || operations.contains("/") {
if let index = operations.firstIndex(of: "*") {
let result = numbers[index] * numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "/") {
let result = numbers[index] / numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
while operations.contains("+") || operations.contains("-") {
if let index = operations.firstIndex(of: "+") {
let result = numbers[index] + numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
} else if let index = operations.firstIndex(of: "-") {
let result = numbers[index] - numbers[index + 1]
numbers.remove(at: index)
numbers.remove(at: index)
numbers.insert(result, at: index)
operations.remove(at: index)
}
}
guard numbers.count == 1 else {
throw CalculateError.invalidInput
}
return numbers.first!
}
```Double(String(string[$0.range]))! // subscript 'subscript(_:)' requires that 'NSRange' (aka '_NSRange') conform to 'RangeExpression'String(string[$0.range]) // subscript 'subscript(_:)' requires that 'NSRange' (aka '_NSRange') conform to 'RangeExpression'func execute(binary: String, arguments: [String]) -> (String, String){
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
process.standardError = pipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8) ?? ""
return (output, output)
}{
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
process.standardError = pipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8) ?? ""
return (output, output)
}
``` // XCTAssertEqual failed: (Hello!) is not equal to ()import Foundation
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
let stdout = output as String? ?? ""
let stderr = output as String? ?? ""
task.waitUntilExit()
return (stdout, stderr)
}```swift
import Foundation
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
let stdout = output as String? ?? ""
let stderr = output as String? ?? ""
task.waitUntilExit()
return (stdout, stderr)
}
``` // XCTAssertEqual failed: (Hello!) is not equal to ()func execute(binary: String, arguments: [String]) -> (String, String){
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
process.standardError = pipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8) ?? ""
return (output, output)
}{
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
process.standardError = pipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: .utf8) ?? ""
return (output, output)
}
``` // XCTAssertEqual failed: (Hello!) is not equal to ()func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding: .utf8) ?? ""
let error = String(data: errorData, encoding: .utf8) ?? ""
task.waitUntilExit()
return (output, error)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding: .utf8) ?? ""
let error = String(data: errorData, encoding: .utf8) ?? ""
task.waitUntilExit()
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}
```func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding: .utf8) ?? ""
let error = String(data: errorData, encoding: .utf8) ?? ""
task.waitUntilExit()
return (output, error)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outputPipe = Pipe()
let errorPipe = Pipe()
task.standardOutput = outputPipe
task.standardError = errorPipe
task.launch()
let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: outputData, encoding: .utf8) ?? ""
let error = String(data: errorData, encoding: .utf8) ?? ""
task.waitUntilExit()
return (output, error)
}
```func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}
```func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let stdout = NSString(data: outdata, encoding: String.Encoding.utf8.rawValue) as! String
let stderr = NSString(data: errdata, encoding: String.Encoding.utf8.rawValue) as! String
task.waitUntilExit()
return (stdout, stderr)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let stdout = NSString(data: outdata, encoding: String.Encoding.utf8.rawValue) as! String
let stderr = NSString(data: errdata, encoding: String.Encoding.utf8.rawValue) as! String
task.waitUntilExit()
return (stdout, stderr)
}
```let stdout = NSString(data: outdata, encoding: String.Encoding.utf8.rawValue) as! String // forced cast from 'NSString?' to 'String' only unwraps and bridges; did you mean to use '!' with 'as'?let stderr = NSString(data: errdata, encoding: String.Encoding.utf8.rawValue) as! String // forced cast from 'NSString?' to 'String' only unwraps and bridges; did you mean to use '!' with 'as'?func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = NSString(data: outdata, encoding: String.Encoding.utf8.rawValue)
let errstring = NSString(data: errdata, encoding: String.Encoding.utf8.rawValue)
return (outstring as! String, errstring as! String)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = NSString(data: outdata, encoding: String.Encoding.utf8.rawValue)
let errstring = NSString(data: errdata, encoding: String.Encoding.utf8.rawValue)
return (outstring as! String, errstring as! String)
}
```return (outstring as! String, errstring as! String) // forced cast from 'NSString?' to 'String' only unwraps and bridges; did you mean to use '!' with 'as'?return (outstring as! String, errstring as! String) // forced cast from 'NSString?' to 'String' only unwraps and bridges; did you mean to use '!' with 'as'?func execute(binary: String, arguments: [String]) -> (String, String){
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}{
let task = Process()
task.launchPath = binary
task.arguments = arguments
let outpipe = Pipe()
task.standardOutput = outpipe
let errpipe = Pipe()
task.standardError = errpipe
task.launch()
let outdata = outpipe.fileHandleForReading.readDataToEndOfFile()
let errdata = errpipe.fileHandleForReading.readDataToEndOfFile()
let outstring = String(data: outdata, encoding: .utf8) ?? ""
let errstring = String(data: errdata, encoding: .utf8) ?? ""
return (outstring, errstring)
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let cachedResult = cache[arg] {
return cachedResult
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let cachedResult = cache[arg] {
return cachedResult
} 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 cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```
This memoize function takes a function as an argument and returns a new function. The new function checks if the input has already been computed and cached. If it has, it returns the cached result. If it hasn't, it computes the result, caches it, and then returns it.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}Here is a simple implementation of a memoization function in Swift:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```
This function takes in a function `function` as an argument, which is expected to be of type `(T) -> U`. It then returns a new function that takes an input of type `T` and returns a result of type `U`.
Inside the returned function, we first check if the input has already been computed and its result is cached in the `cache` dictionary. If it is, we return the cached result. If not, we compute the result using the original function, cache it in the `cache` dictionary, and then return it.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}Here is a simple implementation of a memoization function in Swift:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```
This function takes in a function `function` as a parameter, which is the expensive computation you want to cache. It returns a new function that takes an input `input` of type `T`, and returns a value of type `U`.
Inside the returned function, it first checks if the input is already in the cache. If it is, it returns the cached result. If it's not, it computes the result using the original function, stores it in the cache, and then returns it.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}Here is a simple implementation of a memoization function in Swift:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```
This function takes a function as an argument and returns a new function. The new function checks if the input has been seen before. If it has, it returns the cached result. If it hasn't, it computes the result, caches it, and then returns it.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let cachedResult = cache[arg] {
return cachedResult
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}Here is a simple implementation of a memoization function in Swift:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let cachedResult = cache[arg] {
return cachedResult
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}
```
This function takes in a function `function` as a parameter, which is a function that takes an argument of type `T` and returns a result of type `U`. The function returns a new function that takes an argument of type `T`.
Inside the new function, we first check if the argument `arg` is already in the cache. If it is, we return the cached result. If it's not, we call the original function `function` with `arg` as the argument, store the result in the cache, and then return the result.
This way, if the function is called again with the same argument, we can return the cached result instead of recomputing it, which can save time and resources.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var memo: [T: U] = [:]
return { arg in
if let memoizedResult = memo[arg] {
return memoizedResult
} else {
let result = function(arg)
memo[arg] = result
return result
}
}
}Here is a simple implementation of a memoization function in Swift:
```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var memo: [T: U] = [:]
return { arg in
if let memoizedResult = memo[arg] {
return memoizedResult
} else {
let result = function(arg)
memo[arg] = result
return result
}
}
}
```
This function takes a function as an argument and returns a new function. The new function checks if the result for a given argument is already in the memo dictionary. If it is, it returns the memoized result. If it's not, it computes the result, stores it in the memo dictionary, and then returns it.func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} 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 cachedResult = cache[arg] {
return cachedResult
} else {
let result = function(arg)
cache[arg] = result
return result
}
}
}```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { arg in
if let cachedResult = cache[arg] {
return cachedResult
} 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 cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}```swift
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache: [T: U] = [:]
return { input in
if let cachedResult = cache[input] {
return cachedResult
} else {
let result = function(input)
cache[input] = result
return result
}
}
}
```
This memoize function takes a function as an argument and returns a new function that caches the results of the original function. The cache is a dictionary where the keys are the inputs to the original function and the values are the results of the original function. If the function has already been called with a particular input, the cached result is returned. Otherwise, the original function is called, the result is cached, and then returned.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while attempt < attempts {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
}
}The function `retry` takes two parameters: `attempts` and `task`. `attempts` is an integer that specifies the number of times the task should be retried if it fails. `task` is a closure that represents the task to be executed.
The function throws an error if the task fails after all attempts. Otherwise, it returns the result of the task.
Here's the implementation:
```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while attempt < attempts {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
}
}
```
You can use this function to retry a task like this:
```swift
do {
let result = try retry(attempts: 3) {
// Your task code here
// For example:
// let data = try fetchDataFromNetwork()
// return data
}
// Use the result here
// For example:
// print(result)
} catch {
// Handle the error here
// For example:
// print("Failed to retrieve data after 3 attempts: \(error)")
}
```} // missing return in global function expected to return 'T'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function takes two parameters: `attempts`, the number of times the task should be retried, and `task`, the function to be executed. It uses a `do-catch` statement to execute the task and catch any errors it throws. If the task succeeds, the function returns the result. If the task throws an error and there are still attempts left, the function catches the error and tries the task again. If the task still throws an error after all attempts, the function throws the error.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while attempt < attempts {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
}
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while attempt < attempts {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
}
}
```
This function `retry` takes two parameters: `attempts` which is the number of times the task should be retried, and `task` which is the closure that contains the task to be executed.
The function uses a `while` loop to execute the task until it succeeds or the maximum number of attempts is reached. If the task succeeds, the function returns the result. If the task fails and the maximum number of attempts is reached, the function throws the error.} // missing return in global function expected to return 'T'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function takes two parameters: `attempts`, the number of times the task should be retried, and `task`, the closure that performs the task. The function returns a value of type `T`, which is the return type of the task closure.
The function uses a `repeat-while` loop to execute the task and catch any errors it throws. If an error is thrown, the function increments the `attempt` counter. If the `attempt` counter reaches the specified number of attempts, the function throws the error. Otherwise, the loop continues and the task is executed again.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function `retry` takes two parameters: `attempts` (the number of times to retry the task) and `task` (the task to be performed). It uses a `repeat-while` loop to execute the task and catch any errors that may occur. If an error is thrown, it increments the `attempt` counter. If the number of attempts exceeds the specified limit, it throws the error. Otherwise, it continues to retry the task until it succeeds.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function `retry` takes two parameters: `attempts` which is the number of times the task should be retried, and `task` which is the closure that contains the task to be executed.
The function uses a `repeat-while` loop to execute the task and catch any errors that might be thrown. If an error is thrown, the function increments the `attempt` counter. If the `attempt` counter reaches the specified number of `attempts`, the function throws the error. Otherwise, the task is executed again.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function `retry` takes two parameters: `attempts` which is the number of times the task should be retried, and `task` which is the closure that contains the task to be performed.
The function uses a `repeat-while` loop to execute the task and catch any errors that may occur. If an error is thrown, the function increments the `attempt` counter. If the number of attempts exceeds the specified `attempts` parameter, the function throws the error. Otherwise, the function continues to retry the task until it succeeds.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function `retry` takes two parameters: `attempts` (the number of times to retry the task) and `task` (the task to be executed). It uses a `repeat-while` loop to execute the task and catch any errors that may occur. If an error occurs, it increments the `attempt` counter. If the number of attempts exceeds the specified `attempts` parameter, it throws the error. Otherwise, it continues to retry the task.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task.
The function returns a value of type `T`, which is the return type of the `task` function.
Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function.
If the loop completes without the `task` function returning a value, the function throws an error using the `throw` keyword. This indicates that the `task` function could not be completed after the specified number of attempts.
Here's an example of how the `retry` function can be used:
func fetchData() throws -> Data {
// Code to fetch data goes here
}The `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task.
The function returns a value of type `T`, which is the return type of the `task` function.
Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function.
If the loop completes without the `task` function returning a value, the function throws an error using the `throw` keyword. This indicates that the `task` function could not be completed after the specified number of attempts.
Here's an example of how the `retry` function can be used:
```swift
func fetchData() throws -> Data {
// Code to fetch data goes here
}
do {
let data = try retry(attempts: 3, task: fetchData)
// Use the data
} catch {
// Handle the error
}
```
In this example, the `fetchData` function is passed as the `task` parameter to the `retry` function. The `fetchData` function is called up to three times using the `try` keyword. If the `fetchData` function throws an error in any of the attempts, the loop continues to the next attempt. If the `fetchData` function does not throw an error, the data it returns is returned by the `retry` function. If the loop completes without the `fetchData` function returning data, the `catch` block is executed, and an error is thrown.func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // extraneous whitespace after '.' is not permittedfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // cannot find 'two' in scopefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // generic parameter 'T' could not be inferredfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // cannot find type 'TThe' in scopefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // cannot find 'takes' in scopefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // expected expressionfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // expected member name following '.'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // cannot find 'parameters' in scopefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // expansion of macro 'function()' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> TThe `retry` function takes two parameters: `attempts` and `task`. `attempts` is the number of times the `task` should be attempted before failing, and `task` is the function that performs the task. // consecutive statements on a line must be separated by ';'The function returns a value of type `T`, which is the return type of the `task` function. // cannot find 'task' in scopeThe function returns a value of type `T`, which is the return type of the `task` function. // consecutive statements on a line must be separated by ';'The function returns a value of type `T`, which is the return type of the `task` function. // cannot find 'of' in scopeThe function returns a value of type `T`, which is the return type of the `task` function. // consecutive statements on a line must be separated by ';'The function returns a value of type `T`, which is the return type of the `task` function. // expected member name following '.'The function returns a value of type `T`, which is the return type of the `task` function. // consecutive statements on a line must be separated by ';'The function returns a value of type `T`, which is the return type of the `task` function. // cannot find 'the' in scopeThe function returns a value of type `T`, which is the return type of the `task` function. // consecutive statements on a line must be separated by ';'The function returns a value of type `T`, which is the return type of the `task` function. // return invalid outside of a funcInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'the' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // extraneous whitespace after '.' is not permittedInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expansion of macro 'error' requires leading '#'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'task' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // generic parameter 'T' could not be inferredInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // extraneous whitespace after '.' is not permittedInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'an' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // 'throws' may only occur before '->'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'Inside' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expansion of macro 'error' requires leading '#'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'the' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expected expressionInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expansion of macro 'function()' requires leading '#'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // extraneous whitespace after '.' is not permittedInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expected expressionInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // cannot find 'an' in scopeInside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // expected member name following '.'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // consecutive statements on a line must be separated by ';'Inside the `retry` function, a `for` loop is used to iterate `attempts` number of times. In each iteration, the `task` function is called using the `try` keyword, which allows the function to throw an error. If the `task` function throws an error, the loop continues to the next iteration. If the `task` function does not throw an error, the value it returns is returned by the `retry` function. // value of type '(String) -> ()' has no member 'If'If the loop completes without the `task` function returning a value, the function throws an error using the `throw` keyword. This indicates that the `task` function could not be completed after the specified number of attempts. // expected member name following '.'If the loop completes without the `task` function returning a value, the function throws an error using the `throw` keyword. This indicates that the `task` function could not be completed after the specified number of attempts. // extraneous whitespace after '.' is not permittedHere's an example of how the `retry` function can be used: // unterminated string literalfunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}```swift
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
repeat {
do {
return try task()
} catch {
attempt += 1
if attempt == attempts {
throw error
}
}
} while true
}
```
This function `retry` takes two parameters: `attempts` (the number of times to retry the task) and `task` (the task to be performed). It uses a `repeat-while` loop to execute the task and catch any errors that may occur. If an error is caught, it increments the `attempt` counter. If the number of attempts exceeds the specified limit, it throws the error. Otherwise, it continues to retry the task until it succeeds.protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer:DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
let key = String(describing: type)
factories[key] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
let key = String(describing: type)
guard let factory = factories[key] else { return nil }
return factory() as? T
}
}
```
This code defines a simple dependency injection (DI) container in Swift. The `DIContainerProtocol` protocol defines two methods: `register` and `resolve`. The `register` method takes a type and a factory closure, and stores the factory closure in a dictionary using the type as the key. The `resolve` method takes a type, looks up the factory closure in the dictionary, and returns the result of calling the factory closure.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 {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition defined for state \(state) and event \(event)")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition defined for state \(state) and event \(event)")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition defined for current state and event")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition defined for current state and event")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
print("No transition registered for current state and event")
}
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
print("No transition registered for current state and event")
}
}
}
```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 {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
fatalError("No transition registered for current state and event")
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
fatalError("No transition registered for current state and event")
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
fatalError("No transition registered for current state and event")
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
private var transitions: [State: [Event: State]] = [:]
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
if let nextState = transitions[state]?[event] {
state = nextState
} else {
fatalError("No transition registered for current state and event")
}
}
func registerTransition(from: State, to: State, event: Event) {
if transitions[from] == nil {
transitions[from] = [:]
}
transitions[from]?[event] = to
}
}
```indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```
This code defines an abstract file system manager using an enumeration `FileSystemNode` that can represent either a file or a directory. The `FileSystemInfo` protocol is used to calculate the total size of all files, the number of files, and the depth of the file system tree. The `FileSystemNode` extension provides the implementation for these properties.case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```
This code defines an enum `FileSystemNode` that can be either a `file` or a `directory`. The `FileSystemInfo` protocol is then defined to calculate the total size of all files, the count of files, and the depth of the file system tree. The `FileSystemNode` extension then implements these properties recursively for both `file` and `directory` cases.case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name, size):
return size
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name, contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```
This code defines an `enum` `FileSystemNode` that can be either a `file` or a `directory`. It conforms to the `FileSystemInfo` protocol which provides properties to calculate the total size of all files, the number of files, and the depth of the file system tree. The `totalSize` property recursively calculates the total size of all files in the file system tree. The `filesCount` property recursively calculates the number of files in the file system tree. The `treeDepth` property recursively calculates the depth of the file system tree.case let .file(name, size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase let .directory(name, 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 let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}```swift
var totalSize: Int {
switch self {
case let .file(name: _, size: size):
return size
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.totalSize })
}
}
var filesCount: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return contents.reduce(0, { $0 + $1.filesCount })
}
}
var treeDepth: Int {
switch self {
case .file:
return 1
case let .directory(name: _, contents: contents):
return 1 + (contents.map { $0.treeDepth }.max() ?? 0)
}
}
}
```protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
typealias Element = T
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}T>: StackProtocol {
typealias Element = T
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}T>: StackProtocol {
private var elements: [T] = []
init() {}
func push(_ element: T) {
elements.append(element)
}
func pop() -> T? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<T>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}Element>: StackProtocol {
private var elements: [Element] = []
init() {}
func push(_ element: Element) {
elements.append(element)
}
func pop() -> Element? {
return elements.popLast()
}
}
```init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol 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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let newValue = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
cache[key] = newValue
accessQueue.append(key)
} else {
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let newValue = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
cache[key] = newValue
accessQueue.append(key)
} else {
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let element = newValue {
if let _ = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
} else if cache.count >= capacity {
if let evictKey = accessQueue.first {
cache[evictKey] = nil
accessQueue.removeFirst()
}
}
cache[key] = element
accessQueue.append(key)
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let element = newValue {
if let _ = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
} else if cache.count >= capacity {
if let evictKey = accessQueue.first {
cache[evictKey] = nil
accessQueue.removeFirst()
}
}
cache[key] = element
accessQueue.append(key)
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let value = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let value = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else {
return nil
}
updateAccessQueue(key: key)
return value
}
set {
if let value = newValue {
cache[key] = value
updateAccessQueue(key: key)
checkCapacity()
} else {
cache.removeValue(forKey: key)
accessQueue.removeAll(where: { $0 == key })
}
}
}
private func updateAccessQueue(key: Key) {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
accessQueue.append(key)
}
private func checkCapacity() {
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else {
return nil
}
updateAccessQueue(key: key)
return value
}
set {
if let value = newValue {
cache[key] = value
updateAccessQueue(key: key)
checkCapacity()
} else {
cache.removeValue(forKey: key)
accessQueue.removeAll(where: { $0 == key })
}
}
}
private func updateAccessQueue(key: Key) {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
accessQueue.append(key)
}
private func checkCapacity() {
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let value = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is at capacity, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let value = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is at capacity, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: 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 accessQueue: [Key] = []
private let capacity: Int
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
set {
if let value = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
cache[key] = value
accessQueue.append(key)
} else {
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
private let capacity: Int
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else { return nil }
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
set {
if let value = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
cache[key] = value
accessQueue.append(key)
} else {
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: 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 accessQueue: [Key] = []
private let capacity: Int
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let element = newValue {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
accessQueue.append(key)
cache[key] = element
if accessQueue.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache[leastRecentlyUsedKey] = nil
accessQueue.removeFirst()
}
}
} else {
cache[key] = nil
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
private let capacity: Int
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let element = newValue {
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
accessQueue.append(key)
cache[key] = element
if accessQueue.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache[leastRecentlyUsedKey] = nil
accessQueue.removeFirst()
}
}
} else {
cache[key] = nil
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
// Move the accessed key to the end of the access queue
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return element
}
return nil
}
set {
if let value = newValue {
// If the key already exists, update its value and move it to the end of the access queue
if cache.keys.contains(key) {
cache[key] = value
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
} else {
// If the key doesn't exist, add it to the cache and access queue
cache[key] = value
accessQueue.append(key)
// If the cache is full, remove the least recently used item
if cache.count > capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache.removeValue(forKey: leastRecentlyUsedKey)
accessQueue.removeFirst()
}
}
}
} else {
// If the value is nil, remove the key from the cache and access queue
cache.removeValue(forKey: key)
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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 accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else {
return nil
}
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
set {
if let value = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache[leastRecentlyUsedKey] = nil
accessQueue.removeFirst()
}
}
cache[key] = value
accessQueue.append(key)
} else {
cache[key] = nil
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}: Hashable, Element>: CacheProtocol {
private let capacity: Int
private var cache: [Key: Element] = [:]
private var accessQueue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let value = cache[key] else {
return nil
}
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
accessQueue.append(key)
}
return value
}
set {
if let value = newValue {
if cache.count >= capacity {
if let leastRecentlyUsedKey = accessQueue.first {
cache[leastRecentlyUsedKey] = nil
accessQueue.removeFirst()
}
}
cache[key] = value
accessQueue.append(key)
} else {
cache[key] = nil
if let index = accessQueue.firstIndex(of: key) {
accessQueue.remove(at: index)
}
}
}
}
}
```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, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' 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, Date)] = [:]
private var expirationInterval: TimeInterval = 0
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expirationInterval: TimeInterval = 0
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date(timeIntervalSinceNow: expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' 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, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' 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, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache.removeValue(forKey: key)
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let newValue = newValue {
put(value: newValue, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
func get(key: Key) -> Value? {
if let (value, expirationDate) = cache[key], expirationDate > Date() {
return value
} else {
cache.removeValue(forKey: key)
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let newValue = newValue {
put(value: newValue, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache[key] = nil
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expirationInterval: TimeInterval
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expirationInterval)
} else {
cache[key] = nil
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' 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, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expiration: TimeInterval
init(expiration: TimeInterval) {
self.expiration = expiration
}
func put(value: Value, key: Key, expiration: TimeInterval) {
let expirationDate = Date().addingTimeInterval(expiration)
cache[key] = (value, expirationDate)
}
func get(key: Key) -> Value? {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache.removeValue(forKey: key)
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let queue = DispatchQueue(label: "com.example.cache")
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
}
func get(key: Key) -> Value? {
var value: Value?
queue.sync {
if let (v, expiration) = cache[key], expiration > Date() {
value = v
} else {
cache[key] = nil
}
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let newValue = newValue {
put(value: newValue, key: key, expiration: TimeInterval.infinity)
} else {
queue.async {
self.cache.removeValue(forKey: key)
}
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let queue = DispatchQueue(label: "com.example.cache")
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date().addingTimeInterval(expiration))
}
}
func get(key: Key) -> Value? {
var value: Value?
queue.sync {
if let (v, expiration) = cache[key], expiration > Date() {
value = v
} else {
cache[key] = nil
}
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let newValue = newValue {
put(value: newValue, key: key, expiration: TimeInterval.infinity)
} else {
queue.async {
self.cache.removeValue(forKey: key)
}
}
}
}
}
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expirationIntervals: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date())
expirationIntervals[key] = expiration
}
func get(key: Key) -> Value? {
guard let (value, insertionDate) = cache[key] else { return nil }
if let expirationInterval = expirationIntervals[key], Date().timeIntervalSince(insertionDate) > expirationInterval {
cache[key] = nil
expirationIntervals[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: .infinity)
} else {
cache[key] = nil
expirationIntervals[key] = nil
}
}
}
}Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private var expirationIntervals: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, Date())
expirationIntervals[key] = expiration
}
func get(key: Key) -> Value? {
guard let (value, insertionDate) = cache[key] else { return nil }
if let expirationInterval = expirationIntervals[key], Date().timeIntervalSince(insertionDate) > expirationInterval {
cache[key] = nil
expirationIntervals[key] = nil
return nil
}
return value
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: .infinity)
} else {
cache[key] = nil
expirationIntervals[key] = nil
}
}
}
}
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol 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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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 = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}```swift
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = Data(string.utf8)
let keyData = Data(key.utf8)
var encryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData.append(encryptedByte)
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = Data(key.utf8)
var decryptedData = Data()
for (index, byte) in data.enumerated() {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData.append(decryptedByte)
}
if let decryptedString = String(data: decryptedData, encoding: .utf8) {
return decryptedString
} else {
return ""
}
}
}
```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
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = currentTime
return true
} else {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = currentTime
return true
} else {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
}
}
```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
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = currentTime
return true
} else {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 1
lastRequestTime = currentTime
return true
} else {
if requestCount < maxRequests {
requestCount += 1
lastRequestTime = currentTime
return true
} else {
return false
}
}
} else {
lastRequestTime = currentTime
requestCount = 1
return true
}
}
}
```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 requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
} else {
return false
}
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
} else {
return false
}
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}```swift
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}
```
This code defines a `RateLimiter` class that conforms to the `RateLimiterProtocol`. The `RateLimiter` class has a `maxRequests` property to set the maximum number of requests allowed within a time interval, and a `timeInterval` property to set the time interval. The `allowRequest` method checks if a new request can be made within the defined limits. If the time since the last request is greater than the time interval, the request count is reset to 0 and the last request time is updated. Then, if the request count is less than the maximum number of requests, the request count is incremented and true is returned, indicating that the request is allowed. Otherwise, false is returned, indicating that the request is not allowed.Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter:RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter:RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
} else {
return false
}
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
} else {
return false
}
}
}
```
This code defines a `RateLimiter` class that conforms to the `RateLimiterProtocol`. The `RateLimiter` class has two properties: `maxRequests` and `timeInterval`, which represent the maximum number of requests allowed within a certain time interval.
The `allowRequest` method checks if a new request can be made within the defined limits. It first checks if the time since the last request is greater than the time interval. If it is, it resets the request count and updates the last request time. Then it checks if the request count is less than the maximum number of requests. If it is, it increments the request count and returns `true`, indicating that a new request is allowed. Otherwise, it returns `false`, indicating that a new request is not allowed.Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter:RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}
```
This code defines a `RateLimiter` class that conforms to the `RateLimiterProtocol`. The `RateLimiter` class has two properties: `maxRequests` and `timeInterval`, which define the maximum number of requests allowed within a specified time interval. The `allowRequest` method checks if a new request can be made within the defined limits. If the time since the last request is greater than the time interval, the request count is reset to zero and the last request time is updated. Then, if the request count is less than the maximum number of requests, the request count is incremented and `true` is returned, indicating that a new request is allowed. Otherwise, `false` is returned, indicating that a new request is not allowed.Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var lastRequestTime: Date?
private var requestCount: Int = 0
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 0
} else if requestCount >= maxRequests {
return false
}
}
lastRequestTime = currentTime
requestCount += 1
return true
}
}```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
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
if timeSinceLastRequest > timeInterval {
requestCount = 0
} else if requestCount >= maxRequests {
return false
}
}
lastRequestTime = currentTime
requestCount += 1
return true
}
}
```
This code defines a `RateLimiter` class that conforms to the `RateLimiterProtocol`. The `RateLimiter` class has properties for the maximum number of requests and the time interval. It also has a method `allowRequest()` that checks if a new request can be made within the defined limits. The method uses a timestamp to keep track of the last request time and a request count to determine if the new request should be allowed.Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter:RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter:RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestCount: Int = 0
private var lastRequestTime: Date = Date()
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
let currentTime = Date()
if currentTime.timeIntervalSince(lastRequestTime) > timeInterval {
requestCount = 0
lastRequestTime = currentTime
}
if requestCount < maxRequests {
requestCount += 1
return true
}
return false
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The class uses an `NSLock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by one, and the `currentValue` method returns the current value of the counter. The `defer` statement is used to ensure that the lock is unlocked even if an error occurs during the execution of the method.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The class uses an `NSLock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by one, and the `currentValue` method returns the current value of the counter. The `lock.lock()` method is called before each operation to acquire the lock, and the `defer` statement is used to ensure that the lock is released even if an error occurs during the operation.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The class uses an `NSLock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by 1, and the `currentValue` method returns the current value of the counter. The `defer` statement is used to ensure that the lock is unlocked even if an error occurs during the execution of the locked code.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var count: Int
required init(value: Int) {
self.count = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
count += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return count
}
}```swift
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var count: Int
required init(value: Int) {
self.count = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
count += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return count
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The `NSLock` is used to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter by one, and the `currentValue` method returns the current value of the counter. The `defer` keyword is used to ensure that the lock is unlocked even if an error occurs during the increment or current value retrieval.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var count: Int
required init(value: Int) {
self.count = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
count += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return count
}
}```swift
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var count: Int
required init(value: Int) {
self.count = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
count += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return count
}
}
```
This code creates a thread-safe counter in Swift. It uses an `NSLock` to ensure that only one thread can access the counter at a time, preventing race conditions. The `increment` method increments the counter by one, and the `currentValue` method returns the current value of the counter. Both methods are thread-safe.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The class uses an `NSLock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by 1, while the `currentValue` method returns the current value of the counter. The `lock.lock()` method is called before accessing or modifying the counter value, and the `lock.unlock()` method is called afterwards to release the lock. The `defer` keyword is used to ensure that the lock is released even if an error occurs during the execution of the method.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
import Foundation
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The `NSLock` is used to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by 1, and the `currentValue` method returns the current value of the counter. The `defer` statement is used to ensure that the lock is unlocked even if an error occurs during the execution of the `increment` or `currentValue` methods.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that implements the `ThreadSafeCounterProtocol`. The `NSLock` is used to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by 1, and the `currentValue` method returns the current value of the counter. The `defer` keyword is used to ensure that the lock is released even if an error occurs during the execution of the `increment` or `currentValue` methods.protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
import Foundation
import os
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = os_unfair_lock()
required init(value: Int) {
self.value = value
}
func increment() {
os_unfair_lock_lock(&lock)
defer { os_unfair_lock_unlock(&lock) }
value += 1
}
func currentValue() -> Int {
var result: Int = 0
os_unfair_lock_lock(&lock)
defer { os_unfair_lock_unlock(&lock) }
result = value
return result
}
}```swift
import Foundation
import os
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let lock = os_unfair_lock()
required init(value: Int) {
self.value = value
}
func increment() {
os_unfair_lock_lock(&lock)
defer { os_unfair_lock_unlock(&lock) }
value += 1
}
func currentValue() -> Int {
var result: Int = 0
os_unfair_lock_lock(&lock)
defer { os_unfair_lock_unlock(&lock) }
result = value
return result
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The `ThreadSafeCounter` class uses an `os_unfair_lock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by one, and the `currentValue` method returns the current value of the counter.os_unfair_lock_lock(&lock) // cannot pass immutable value as inout argument: 'lock' is a 'let' constantdefer { os_unfair_lock_unlock(&lock) } // cannot pass immutable value as inout argument: 'lock' is a 'let' constantos_unfair_lock_lock(&lock) // cannot pass immutable value as inout argument: 'lock' is a 'let' constantdefer { os_unfair_lock_unlock(&lock) } // cannot pass immutable value as inout argument: 'lock' is a 'let' constantprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```
This code defines a `ThreadSafeCounter` class that conforms to the `ThreadSafeCounterProtocol`. The class uses an `NSLock` to ensure that the `increment` and `currentValue` methods are thread-safe. The `increment` method increments the counter value by one, and the `currentValue` method returns the current value of the counter. The `lock.lock()` method is called before accessing or modifying the counter value to ensure that only one thread can access the value at a time, and the `defer` statement is used to unlock the lock after the operation is complete.protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```return Pipeline<U>(value: transform(value), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = self.transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = self.transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and three methods: `init(value: Output)`, `pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>`, and `execute() -> Output`.
The `Pipeline` class conforms to this protocol and provides an implementation for each method. The `init(value: Output)` initializer sets the initial value of the pipeline. The `pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>` method adds a new transformation to the pipeline and returns a new `Pipeline` instance with the updated transformations. The `execute() -> Output` method applies all transformations to the current value and returns the final result.init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'return Pipeline<U>(value: transform(currentValue), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = self.transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = self.transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a `value` of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the transformation applied. The `execute` method applies all transformations to the current value and returns the final result.return Pipeline<U>(value: transform(currentValue), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the applied transformation. The `execute` method applies all transformations sequentially to the current value and returns the final result.return Pipeline<U>(value: transform(currentValue), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the transformation applied. The `execute` method applies all transformations to the initial value and returns the final result.return Pipeline<U>(value: transform(value), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the transformation applied. The `execute` method applies all transformations to the initial value and returns the final result.return Pipeline<U>(value: transform(value), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the transformation applied. The `execute` method applies all transformations to the current value and returns the final result.return Pipeline<U>(value: transform(currentValue), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var currentValue: Output
required init(value: Output) {
self.currentValue = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.currentValue = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(currentValue), transformations: newTransformations)
}
func execute() -> Output {
var result = currentValue
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value of type `Output`. It also includes a `pipe` method that takes a transformation function and returns a new `Pipeline` instance with the transformation applied. The `execute` method applies all transformations to the current value and returns the final result.
The `Pipeline` class conforms to the `PipelineProtocol` and provides a way to chain transformations together. The `pipe` method allows adding a new transformation to the pipeline, and the `execute` method applies all transformations to the current value and returns the final result.return Pipeline<U>(value: transform(currentValue), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<T>: PipelineProtocol {
typealias Output = T
private let value: T
private let transformations: [(T) -> T]
required init(value: T) {
self.value = value
self.transformations = []
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newTransform = { (input: T) -> U in
return transform(input)
}
return Pipeline<U>(value: newTransform(self.value), transformations: self.transformations + [newTransform])
}
func execute() -> T {
var result = self.value
for transformation in self.transformations {
result = transformation(result)
}
return result
}
}T>: PipelineProtocol {
typealias Output = T
private let value: T
private let transformations: [(T) -> T]
required init(value: T) {
self.value = value
self.transformations = []
}
func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
let newTransform = { (input: T) -> U in
return transform(input)
}
return Pipeline<U>(value: newTransform(self.value), transformations: self.transformations + [newTransform])
}
func execute() -> T {
var result = self.value
for transformation in self.transformations {
result = transformation(result)
}
return result
}
}
```return Pipeline<U>(value: newTransform(self.value), transformations: self.transformations + [newTransform]) // extra argument 'transformations' in callprotocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}Output>: PipelineProtocol {
typealias Output = Output
private let transformations: [(Output) -> Output]
private var value: Output
required init(value: Output) {
self.value = value
self.transformations = []
}
init(value: Output, transformations: [(Output) -> Output]) {
self.value = value
self.transformations = transformations
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
let newTransformations = transformations + [transform]
return Pipeline<U>(value: transform(value), transformations: newTransformations)
}
func execute() -> Output {
var result = value
for transformation in transformations {
result = transformation(result)
}
return result
}
}
```
This code defines a `PipelineProtocol` protocol that requires an associated type `Output` and initializes with a value. It also includes a `pipe` method that applies a transformation to the value and returns a new `Pipeline` instance with the updated value and transformations. The `execute` method applies all transformations sequentially to the initial value and returns the final result.return Pipeline<U>(value: transform(value), transformations: newTransformations) // cannot convert value of type '[Any]' to expected argument type '[(U) -> U]'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
observer(value)
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
observer(value)
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get { _value }
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for observer in observers.values {
observer(value)
}
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var _value: Value
init(value: Value) {
self._value = value
}
var value: Value {
get { _value }
set {
_value = newValue
notifyObservers()
}
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
private func notifyObservers() {
for observer in observers.values {
observer(value)
}
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value>: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}: ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private(set) var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let id = UUID()
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private(set) var value: Value { // setter for 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 var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: ClosedRange<Value> {
return range
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: ClosedRange<Value> {
return range
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: Value {
return value
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: Value {
return value
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: Value {
return value
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = min(max(wrappedValue, range.lowerBound), range.upperBound)
}
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
var projectedValue: Value {
return value
}
}
```protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
}Value: Comparable>: ClampedProtocol {
private var value: Value
private let range: ClosedRange<Value>
var wrappedValue: Value {
get { value }
set { value = min(max(newValue, range.lowerBound), range.upperBound) }
}
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = wrappedValue
self.range = range
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
``` // XCTAssertEqual failed: (["Setting value: 0", "Accessing value: 0"]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var _value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self._value = wrappedValue
self.logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, _value)
return _value
}
set {
logger(.set, newValue)
_value = newValue
}
}
}Value>: LoggedProtocol {
private var _value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.logger = logger
self._value = wrappedValue
self.logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, _value)
return _value
}
set {
logger(.set, newValue)
_value = newValue
}
}
}
``` // XCTAssertEqual failed: (["Setting value: 0", "Accessing value: 0"]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
logger(.set, wrappedValue)
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
``` // XCTAssertEqual failed: (["Setting value: 0", "Accessing value: 0"]) is not equal to (["Accessing value: 0"])enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}Value>: LoggedProtocol {
private var value: Value
private let logger: (Event, Value) -> Void
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
}
}
}
```protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```
This code defines a `WeatherApplication` class that conforms to the `WeatherApplicationProtocol`. It maintains a `city` property to store the user's search input and a `provider` property to fetch the weather forecast. The `handle(action:)` method processes user actions, updating the `city` property when the user selects characters or deletes them, and fetching the forecast when the user presses the search button. If the forecast is successfully fetched, it returns a `.success` feedback case with the city and forecast. If an error occurs during forecast fetching, it returns a `.failure` feedback case with the city.protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```
This code defines a `WeatherApplication` class that conforms to the `WeatherApplicationProtocol`. It maintains a `city` property to store the user's search input and a `provider` property to fetch the weather forecast. The `handle(action:)` method processes user actions, updating the `city` property when the user selects characters or deletes them, and fetching the forecast when the user presses the search button. It returns an `ApplicationFeedback` based on the outcome of the operation.protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
updateCity(with: character)
case .keyboardDeleteBackwards:
deleteLastCharacterFromCity()
case .searchButtonPress:
return fetchForecast()
}
return nil
}
private func updateCity(with character: Character) {
currentCity = (currentCity ?? "") + String(character)
}
private func deleteLastCharacterFromCity() {
currentCity?.removeLast()
}
private func fetchForecast() -> ApplicationFeedback? {
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
updateCity(with: character)
case .keyboardDeleteBackwards:
deleteLastCharacterFromCity()
case .searchButtonPress:
return fetchForecast()
}
return nil
}
private func updateCity(with character: Character) {
currentCity = (currentCity ?? "") + String(character)
}
private func deleteLastCharacterFromCity() {
currentCity?.removeLast()
}
private func fetchForecast() -> ApplicationFeedback? {
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
```protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
let city = (currentCity ?? "") + String(character)
currentCity = city
return nil
case .keyboardDeleteBackwards:
guard let currentCity = currentCity, !currentCity.isEmpty else {
return nil
}
let city = String(currentCity.dropLast())
self.currentCity = city.isEmpty ? nil : city
return nil
case .searchButtonPress:
guard let city = currentCity else {
return nil
}
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
let city = (currentCity ?? "") + String(character)
currentCity = city
return nil
case .keyboardDeleteBackwards:
guard let currentCity = currentCity, !currentCity.isEmpty else {
return nil
}
let city = String(currentCity.dropLast())
self.currentCity = city.isEmpty ? nil : city
return nil
case .searchButtonPress:
guard let city = currentCity else {
return nil
}
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```
This code defines a `WeatherApplication` class that conforms to the `WeatherApplicationProtocol`. It maintains a `city` property to store the user's input and a `provider` property to fetch the weather forecast. The `handle(action:)` method handles user actions and updates the `city` property accordingly. If the user presses the search button, it attempts to fetch the forecast using the `provider` and returns a `success` or `failure` feedback accordingly.protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```
This code defines a `WeatherApplication` class that conforms to the `WeatherApplicationProtocol`. It maintains a `city` property to store the user's search input and a `provider` property to fetch the weather forecast. The `handle(action:)` method processes user actions, updating the `city` property when the user selects characters or deletes them, and fetching the forecast when the search button is pressed. If the forecast is successfully fetched, it returns a `.success` feedback case with the city and forecast. If an error occurs during forecast fetching, it returns a `.failure` feedback case with the city.protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
updateCity(with: character)
return nil
case .keyboardDeleteBackwards:
deleteCharacterFromCity()
return nil
case .searchButtonPress:
return fetchForecast()
}
}
private func updateCity(with character: Character) {
currentCity = (currentCity ?? "") + String(character)
}
private func deleteCharacterFromCity() {
currentCity = String(currentCity?.dropLast() ?? "")
}
private func fetchForecast() -> ApplicationFeedback? {
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
updateCity(with: character)
return nil
case .keyboardDeleteBackwards:
deleteCharacterFromCity()
return nil
case .searchButtonPress:
return fetchForecast()
}
}
private func updateCity(with character: Character) {
currentCity = (currentCity ?? "") + String(character)
}
private func deleteCharacterFromCity() {
currentCity = String(currentCity?.dropLast() ?? "")
}
private func fetchForecast() -> ApplicationFeedback? {
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
```protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var city: String = ""
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
city.append(character)
return nil
case .keyboardDeleteBackwards:
if !city.isEmpty {
city.removeLast()
}
return nil
case .searchButtonPress:
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```
In this code, we define a `WeatherApplication` class that conforms to the `WeatherApplicationProtocol`. The class has a `provider` property of type `WeatherProvider` and a `city` property of type `String`.
The `init` method is required to initialize the `provider` property.
The `handle` method takes a `UserAction` as input and returns an optional `ApplicationFeedback`. Depending on the type of `UserAction`, the method updates the `city` property or calls the `forecast` method of the `provider` to get the forecast for the city. If the forecast is successful, it returns a `.success` case with the city and forecast. If the forecast fails, it returns a `.failure` case with the city.protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
let city = (currentCity ?? "") + String(character)
currentCity = city
return nil
case .keyboardDeleteBackwards:
guard let city = currentCity else { return nil }
let newCity = String(city.dropLast())
currentCity = newCity.isEmpty ? nil : newCity
return nil
case .searchButtonPress:
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}```swift
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
private var currentCity: String?
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case .keyboardCharacterSelect(let character):
let city = (currentCity ?? "") + String(character)
currentCity = city
return nil
case .keyboardDeleteBackwards:
guard let city = currentCity else { return nil }
let newCity = String(city.dropLast())
currentCity = newCity.isEmpty ? nil : newCity
return nil
case .searchButtonPress:
guard let city = currentCity else { return nil }
do {
let forecast = try provider.forecast(for: city)
return .success(city: city, forecast: forecast)
} catch {
return .failure(city: city)
}
}
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private(set) var balance: Double
required init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private(set) var balance: Double
required init(balance: Double) {
self.balance = balance
}
func deposit(amount: Double) async {
balance += amount
}
func withdraw(amount: Double) async -> Bool {
if balance >= amount {
balance -= amount
return true
} else {
return false
}
}
}
```required init(balance: Double) { // 'required' initializer in non-class type 'BankAccount'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```
This code defines a `BankAccount` actor that conforms to the `BankAccountProtocol`. The `BankAccount` actor maintains a private `_balance` property and provides asynchronous methods for depositing and withdrawing funds from the account. The `get async` method allows other actors to retrieve the current balance, while the `deposit` and `withdraw` methods ensure that the balance is updated atomically.protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```
This code defines a `BankAccount` actor that conforms to the `BankAccountProtocol`. The `BankAccount` actor maintains a private `_balance` property and provides asynchronous methods for depositing and withdrawing funds from the account. The `deposit` method simply adds the specified amount to the balance, while the `withdraw` method checks if the account has sufficient funds before subtracting the amount. The `balance` property returns the current balance of the account.protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```
This code defines a `BankAccount` actor that conforms to the `BankAccountProtocol`. The `BankAccount` actor maintains a private `_balance` property and provides asynchronous methods for depositing and withdrawing funds from the account. The `deposit` method simply adds the specified amount to the balance, while the `withdraw` method checks if the account has sufficient funds before subtracting the amount. The `balance` property is implemented as a getter that returns the current balance asynchronously.protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```
This code defines a `BankAccount` actor that conforms to the `BankAccountProtocol`. The `BankAccount` actor maintains a private `_balance` property and provides asynchronous methods for depositing and withdrawing funds from the account. The `deposit` method simply adds the specified amount to the balance, while the `withdraw` method checks if there are sufficient funds before subtracting the amount from the balance. The `balance` property returns the current balance of the account.protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount <= _balance {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if amount <= _balance {
_balance -= amount
return true
} else {
return false
}
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
return _balance
}
}
func deposit(amount: Double) async {
_balance += amount
}
func withdraw(amount: Double) async -> Bool {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
```protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when a specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `wrappedValue` to be a closure that returns the value and a condition closure that determines when the value should be recomputed.
The `wrappedValue` property of the `Cached` property wrapper checks if the condition closure returns `true` and if so, it sets the `value` to `nil` and recomputes it using the `wrappedValue` closure. If the condition is `false`, it returns the cached `value`. The `wrappedValue` property also provides a setter to allow the value to be set directly.
The `init` method of the `Cached` property wrapper takes a `wrappedValue` closure and a `condition` closure as parameters and initializes the `value` property with the result of calling the `wrappedValue` closure.value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when a specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `wrappedValue` to be a function that returns the value and a `condition` function that returns a boolean indicating whether the cached value should be recomputed.
The `wrappedValue` property of the `Cached` property wrapper checks if the condition has changed and recomputes the value if necessary. The `init` method of the `Cached` property wrapper takes a `wrappedValue` function and a `condition` function as arguments and initializes the `Cached` property wrapper with these functions.value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = storage.wrappedValue()
}
return value!
}
set {
value = newValue
}
}
private var storage: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.storage = wrappedValue
self.condition = condition
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = storage.wrappedValue()
}
return value!
}
set {
value = newValue
}
}
private var storage: () -> Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.storage = wrappedValue
self.condition = condition
}
}
```value = storage.wrappedValue() // value of type '() -> Value' has no member 'wrappedValue'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var cachedValue: Value?
private var computedValue: (() -> Value)?
var wrappedValue: Value {
mutating get {
if let value = cachedValue, !condition() {
return value
} else {
computedValue = { self.wrappedValue }
cachedValue = computedValue!()
return cachedValue!
}
}
set {
cachedValue = newValue
computedValue = nil
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.cachedValue = nil
self.computedValue = { wrappedValue() }
}
}```swift
private var condition: () -> Bool
private var cachedValue: Value?
private var computedValue: (() -> Value)?
var wrappedValue: Value {
mutating get {
if let value = cachedValue, !condition() {
return value
} else {
computedValue = { self.wrappedValue }
cachedValue = computedValue!()
return cachedValue!
}
}
set {
cachedValue = newValue
computedValue = nil
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.cachedValue = nil
self.computedValue = { wrappedValue() }
}
}
```computedValue = { self.wrappedValue } // escaping closure captures mutating 'self' parameterprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when a specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `wrappedValue` to be a function that returns the value and a `condition` function that returns a boolean indicating whether the cached value should be recomputed.
The `wrappedValue` property of the `Cached` property wrapper checks if the condition function returns true. If it does, the cached value is set to nil and the property wrapper will recompute the value on the next access. If the condition function returns false, the property wrapper returns the cached value.
The `init` method of the `Cached` property wrapper takes a `wrappedValue` function and a `condition` function as arguments and initializes the `value` property to the result of calling the `wrappedValue` function.value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when a specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `wrappedValue` to be a function that returns the value and a `condition` function that returns a boolean indicating whether the cached value should be recomputed.
The `wrappedValue` property of the `Cached` property wrapper checks if the condition has changed and recomputes the value if necessary. The `init` method of the `Cached` property wrapper takes a `wrappedValue` function and a `condition` function as arguments and initializes the property wrapper with these functions.value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = WrappedValue()
}
return value!
}
set {
value = newValue
}
}
}```swift
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = WrappedValue()
}
return value!
}
set {
value = newValue
}
}
}
```
This code defines a `CachedProperty` protocol that requires an associated type `Value` and two initializers. The `Cached` struct conforms to this protocol and provides a `wrappedValue` property that computes the wrapped value only when the specified condition changes. The `wrappedValue` property is marked with `@propertyWrapper` to indicate that it is a property wrapper.value = WrappedValue() // cannot find 'WrappedValue' in scopeprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
}```swift
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when the specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `associatedtype Value` and the initializer `init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)`.
The `wrappedValue` property is a getter that checks if the condition is true or if the value is nil, and if so, it computes the new value by calling the `wrappedValue` property's getter. The setter simply assigns the new value to the `value` property.
This property wrapper can be used to cache the computed value of a property and recompute it only when a specified condition changes, which can improve performance by avoiding unnecessary computations.value = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = WrappedValue()
}
return value!
}
set {
value = newValue
}
}
}```swift
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = nil
}
var wrappedValue: Value {
mutating get {
if condition() || value == nil {
value = WrappedValue()
}
return value!
}
set {
value = newValue
}
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when the specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `associatedtype Value` and the initializer `init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)`.
The `wrappedValue` property is marked as `@escaping` to ensure that it is not called after the property wrapper is deallocated. The `wrappedValue` property checks if the condition is true or if the value is nil, and if so, it computes the new value using the wrapped value initializer. The `wrappedValue` property also provides a getter and a setter for the wrapped value.value = WrappedValue() // cannot find 'WrappedValue' in scopeprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}```swift
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
mutating get {
if condition() {
value = nil
}
if value == nil {
value = wrappedValue()
}
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.condition = condition
self.value = wrappedValue()
}
}
```
This code defines a property wrapper `Cached` that caches the computed value of a property and recomputes it only when a specified condition changes. The `Cached` property wrapper conforms to the `CachedProperty` protocol, which requires the `wrappedValue` to be a function that returns the value and a `condition` function that returns a boolean indicating whether the cached value should be recomputed.
The `wrappedValue` property of the `Cached` property wrapper checks if the condition has changed, and if so, it recomputes the value and updates the `value` property. If the condition has not changed, it returns the cached value. The `wrappedValue` property is marked as `mutating` to allow it to modify the `value` property.
The `init` method of the `Cached` property wrapper takes a `wrappedValue` function and a `condition` function as arguments, and initializes the `value` property with the result of calling the `wrappedValue` function.value = wrappedValue() // cannot call value of non-function type 'Value'infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
return g(f(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
return g(f(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
g(f(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
g(f(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
return g(f(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> ((A) -> C) {
return { input in
return g(f(input))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(function1: @escaping (A) -> B, function2: @escaping (B) -> C) -> (A) -> C {
return { input in
function2(function1(input))
}
}
```import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(buffer: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(buffer: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It uses Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The function reads data from the input stream into a buffer of the specified size, updates the hasher with the data, and repeats this process until all data has been read from the input stream. Finally, it returns the final hash value.hasher.update(Data(buffer: buffer, count: bytesRead)) // incorrect argument label in call (have 'buffer:count:', expected 'bytes:count:')hasher.update(Data(buffer: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an input stream and a buffer size as parameters. It uses Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The buffer size determines how much data is read from the stream at a time. The function reads data from the stream into a buffer, updates the hasher with the data, and repeats this process until all data has been read from the stream. Finally, the function returns the computed SHA-256 hash.hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It uses the `SHA256` hasher from Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The data is read from the stream in chunks of the specified buffer size. The function continues to read and update the hasher until there is no more data to read from the stream. Finally, it returns the finalized hash value.hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It uses Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The function reads data from the input stream into a buffer of the specified size, updates the hasher with the data, and repeats this process until all data has been read from the input stream. Finally, it returns the finalized hash value.hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It uses Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The function reads data from the input stream into a buffer of the specified size, updates the hasher with the data, and repeats this process until all data has been read from the input stream. Finally, it returns the finalized hash value.hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(buffer: buffer, length: bytesRead)
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(buffer: buffer, length: bytesRead)
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It uses Apple's CryptoKit framework to compute the SHA-256 hash of the data read from the input stream. The function reads data from the input stream into a buffer of the specified size, updates the hasher with the buffer, and repeats this process until all data has been read from the input stream. Finally, it returns the finalized hash value.hasher.update(buffer: buffer, length: bytesRead) // extra arguments at positions #1, #2 in callhasher.update(buffer: buffer, length: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
var hasher = SHA256()
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(buffer: buffer, length: bytesRead)
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
var hasher = SHA256()
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(buffer: buffer, length: bytesRead)
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It reads data from the input stream in chunks of the specified buffer size, updates the SHA-256 hasher with the data, and finally returns the computed hash.hasher.update(buffer: buffer, length: bytesRead) // extra arguments at positions #1, #2 in callhasher.update(buffer: buffer, length: bytesRead) // missing argument for parameter 'bufferPointer' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}```swift
import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
var hasher = SHA256()
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
while true {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
fatalError("Error reading from input stream")
} else if bytesRead == 0 {
break
}
hasher.update(Data(bytes: buffer, count: bytesRead))
}
return hasher.finalize()
}
```
This function takes an `InputStream` and a `bufferSize` as parameters. It then creates a `SHA256` hasher and a buffer of the specified size. The function reads data from the input stream into the buffer, updates the hasher with the data, and repeats this process until all data has been read. Finally, it returns the final SHA-256 hash of the data.hasher.update(Data(bytes: buffer, count: bytesRead)) // missing argument label 'data:' in calltypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```
This code defines a new initializer for the `String` type that takes a tuple of 16 `Int8` values as its argument. It uses reflection to iterate over the tuple's elements and appends each non-zero `Int8` value to a string. The resulting string is then used to initialize the new `String` instance.result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(int8Value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8 {
if value == 0 {
break
}
result.append(Character(UnicodeScalar(value)))
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8 {
if value == 0 {
break
}
result.append(Character(UnicodeScalar(value)))
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}
```
This code defines a new initializer for the String type that takes a tuple of 16 Int8 values as an argument. It then uses reflection to iterate over the tuple's elements and appends each non-zero Int8 value to a result string. Finally, it initializes the String instance with the result string.result.append(Character(UnicodeScalar(int8Value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
result.append(Character(UnicodeScalar(value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(value))) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}```swift
var result = ""
let mirror = Mirror(reflecting: tuple16)
for child in mirror.children {
if let int8Value = child.value as? Int8, int8Value != 0 {
result.append(Character(UnicodeScalar(int8Value)))
} else {
break
}
}
self.init(result)
}
}
```result.append(Character(UnicodeScalar(int8Value))) // no exact matches in call to initializerimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsWidth == rhsWidth && lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress != nil && rhsBaseAddress != nil else {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
guard lhsBytesPerRow == rhsBytesPerRow else {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight)
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight)
return lhsData == rhsData
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsWidth == rhsWidth && lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress != nil && rhsBaseAddress != nil else {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
guard lhsBytesPerRow == rhsBytesPerRow else {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight)
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight)
return lhsData == rhsData
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight) // cannot convert value of type 'Duration' to expected argument type 'Int'let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight) // cannot convert value of type 'Duration' to expected argument type 'Int'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
if lhsBaseAddress == nil || rhsBaseAddress == nil {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
return lhsData == rhsData
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
if lhsBaseAddress == nil || rhsBaseAddress == nil {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
return lhsData == rhsData
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
guard lhsWidth == rhsWidth else {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsHeight == rhsHeight else {
return false
}
var lhsBaseAddress: UnsafeMutablePointer<Void>?
var lhsBytesPerRow: Int = 0
let lhsResult = CVPixelBufferLockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
if lhsResult == kCVReturnSuccess {
lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
} else {
return false
}
var rhsBaseAddress: UnsafeMutablePointer<Void>?
var rhsBytesPerRow: Int = 0
let rhsResult = CVPixelBufferLockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
if rhsResult == kCVReturnSuccess {
rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
} else {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return false
}
let lhsBytes = lhsBaseAddress!.assumingMemoryBound(to: UInt8.self)
let rhsBytes = rhsBaseAddress!.assumingMemoryBound(to: UInt8.self)
for i in 0..<lhsHeight {
let lhsRow = lhsBytes.advanced(by: i * lhsBytesPerRow)
let rhsRow = rhsBytes.advanced(by: i * rhsBytesPerRow)
if memcmp(lhsRow, rhsRow, lhsWidth * 4) != 0 {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return false
}
}
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return true
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
guard lhsWidth == rhsWidth else {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsHeight == rhsHeight else {
return false
}
var lhsBaseAddress: UnsafeMutablePointer<Void>?
var lhsBytesPerRow: Int = 0
let lhsResult = CVPixelBufferLockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
if lhsResult == kCVReturnSuccess {
lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
} else {
return false
}
var rhsBaseAddress: UnsafeMutablePointer<Void>?
var rhsBytesPerRow: Int = 0
let rhsResult = CVPixelBufferLockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
if rhsResult == kCVReturnSuccess {
rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
} else {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return false
}
let lhsBytes = lhsBaseAddress!.assumingMemoryBound(to: UInt8.self)
let rhsBytes = rhsBaseAddress!.assumingMemoryBound(to: UInt8.self)
for i in 0..<lhsHeight {
let lhsRow = lhsBytes.advanced(by: i * lhsBytesPerRow)
let rhsRow = rhsBytes.advanced(by: i * rhsBytesPerRow)
if memcmp(lhsRow, rhsRow, lhsWidth * 4) != 0 {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return false
}
}
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
return true
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersvar lhsBaseAddress: UnsafeMutablePointer<Void>? // UnsafeMutablePointer<Void> has been replaced by UnsafeMutableRawPointerlhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer) // cannot assign value of type 'UnsafeMutableRawPointer?' to type 'UnsafeMutablePointer<Void>?'var rhsBaseAddress: UnsafeMutablePointer<Void>? // UnsafeMutablePointer<Void> has been replaced by UnsafeMutableRawPointerrhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer) // cannot assign value of type 'UnsafeMutableRawPointer?' to type 'UnsafeMutablePointer<Void>?'let lhsBytes = lhsBaseAddress!.assumingMemoryBound(to: UInt8.self) // value of type 'UnsafeMutablePointer<Void>' has no member 'assumingMemoryBound'let rhsBytes = rhsBaseAddress!.assumingMemoryBound(to: UInt8.self) // value of type 'UnsafeMutablePointer<Void>' has no member 'assumingMemoryBound'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBuffer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBuffer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsSize = CVPixelBufferGetDataSize(lhsPixelBuffer)
let rhsSize = CVPixelBufferGetDataSize(rhsPixelBuffer)
if lhsSize != rhsSize {
return false
}
return memcmp(lhsBuffer, rhsBuffer, lhsSize) == 0
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBuffer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBuffer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsSize = CVPixelBufferGetDataSize(lhsPixelBuffer)
let rhsSize = CVPixelBufferGetDataSize(rhsPixelBuffer)
if lhsSize != rhsSize {
return false
}
return memcmp(lhsBuffer, rhsBuffer, lhsSize) == 0
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsWidth == rhsWidth && lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress != nil && rhsBaseAddress != nil else {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
guard lhsBytesPerRow == rhsBytesPerRow else {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight)
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight)
return lhsData == rhsData
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsWidth == rhsWidth && lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress != nil && rhsBaseAddress != nil else {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
guard lhsBytesPerRow == rhsBytesPerRow else {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight)
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight)
return lhsData == rhsData
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * lhsHeight) // cannot convert value of type 'Duration' to expected argument type 'Int'let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * rhsHeight) // cannot convert value of type 'Duration' to expected argument type 'Int'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs)
let rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs)
guard let lhsBuffer = lhsPixelBuffer, let rhsBuffer = rhsPixelBuffer else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsBuffer)
let lhsFormat = CVPixelBufferGetPixelFormatType(lhsBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsBuffer)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhsBuffer)
if lhsWidth != rhsWidth || lhsHeight != rhsHeight || lhsFormat != rhsFormat {
return false
}
let lhsPlanes = CVPixelBufferGetPlaneCount(lhsBuffer)
let rhsPlanes = CVPixelBufferGetPlaneCount(rhsBuffer)
if lhsPlanes != rhsPlanes {
return false
}
for i in 0..<lhsPlanes {
let lhsBaseAddress = CVPixelBufferGetBaseAddressOfPlane(lhsBuffer, i)
let rhsBaseAddress = CVPixelBufferGetBaseAddressOfPlane(rhsBuffer, i)
if lhsBaseAddress != rhsBaseAddress {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhsBuffer, i)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhsBuffer, i)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
}
return true
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs)
let rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs)
guard let lhsBuffer = lhsPixelBuffer, let rhsBuffer = rhsPixelBuffer else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsBuffer)
let lhsHeight = CVPixelBufferGetHeight(lhsBuffer)
let lhsFormat = CVPixelBufferGetPixelFormatType(lhsBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsBuffer)
let rhsFormat = CVPixelBufferGetPixelFormatType(rhsBuffer)
if lhsWidth != rhsWidth || lhsHeight != rhsHeight || lhsFormat != rhsFormat {
return false
}
let lhsPlanes = CVPixelBufferGetPlaneCount(lhsBuffer)
let rhsPlanes = CVPixelBufferGetPlaneCount(rhsBuffer)
if lhsPlanes != rhsPlanes {
return false
}
for i in 0..<lhsPlanes {
let lhsBaseAddress = CVPixelBufferGetBaseAddressOfPlane(lhsBuffer, i)
let rhsBaseAddress = CVPixelBufferGetBaseAddressOfPlane(rhsBuffer, i)
if lhsBaseAddress != rhsBaseAddress {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(lhsBuffer, i)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(rhsBuffer, i)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
}
return true
}
```let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if lhsPixelBuffer.width != rhsPixelBuffer.width || lhsPixelBuffer.height != rhsPixelBuffer.height {
return false
}
if lhsPixelBuffer.pixelFormat != rhsPixelBuffer.pixelFormat {
return false
}
let lhsBuffer = CVPixelBufferLockBaseAddress(lhsPixelBuffer, .readOnly)
let rhsBuffer = CVPixelBufferLockBaseAddress(rhsPixelBuffer, .readOnly)
let lhsPointer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsPointer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
let lhsData = Data(bytes: lhsPointer!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsPointer!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, .readOnly)
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, .readOnly)
return lhsData == rhsData
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if lhsPixelBuffer.width != rhsPixelBuffer.width || lhsPixelBuffer.height != rhsPixelBuffer.height {
return false
}
if lhsPixelBuffer.pixelFormat != rhsPixelBuffer.pixelFormat {
return false
}
let lhsBuffer = CVPixelBufferLockBaseAddress(lhsPixelBuffer, .readOnly)
let rhsBuffer = CVPixelBufferLockBaseAddress(rhsPixelBuffer, .readOnly)
let lhsPointer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsPointer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
let lhsData = Data(bytes: lhsPointer!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsPointer!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, .readOnly)
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, .readOnly)
return lhsData == rhsData
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
guard lhsWidth == rhsWidth else {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress == rhsBaseAddress else {
return false
}
return true
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
guard CVPixelBufferGetPixelFormatType(lhsPixelBuffer) == CVPixelBufferGetPixelFormatType(rhsPixelBuffer) else {
return false
}
let lhsWidth = CVPixelBufferGetWidth(lhsPixelBuffer)
let rhsWidth = CVPixelBufferGetWidth(rhsPixelBuffer)
guard lhsWidth == rhsWidth else {
return false
}
let lhsHeight = CVPixelBufferGetHeight(lhsPixelBuffer)
let rhsHeight = CVPixelBufferGetHeight(rhsPixelBuffer)
guard lhsHeight == rhsHeight else {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
guard lhsBaseAddress == rhsBaseAddress else {
return false
}
return true
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs)
let rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs)
if lhsPixelBuffer.width != rhsPixelBuffer.width || lhsPixelBuffer.height != rhsPixelBuffer.height {
return false
}
if lhsPixelBuffer.pixelFormatType != rhsPixelBuffer.pixelFormatType {
return false
}
let lhsPixelBufferData = CVPixelBufferLockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
let rhsPixelBufferData = CVPixelBufferLockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
let lhsPointer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsPointer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsSize = CVPixelBufferGetDataSize(lhsPixelBuffer)
let rhsSize = CVPixelBufferGetDataSize(rhsPixelBuffer)
if lhsSize != rhsSize {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return false
}
let lhsBuffer = lhsPointer!.assumingMemoryBound(to: UInt8.self)
let rhsBuffer = rhsPointer!.assumingMemoryBound(to: UInt8.self)
for i in 0..<lhsSize {
if lhsBuffer[i] != rhsBuffer[i] {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return false
}
}
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return true
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs)
let rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs)
if lhsPixelBuffer.width != rhsPixelBuffer.width || lhsPixelBuffer.height != rhsPixelBuffer.height {
return false
}
if lhsPixelBuffer.pixelFormatType != rhsPixelBuffer.pixelFormatType {
return false
}
let lhsPixelBufferData = CVPixelBufferLockBaseAddress(lhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
let rhsPixelBufferData = CVPixelBufferLockBaseAddress(rhsPixelBuffer, CVPixelBufferLockFlags(rawValue: 0))
let lhsPointer = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsPointer = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
let lhsSize = CVPixelBufferGetDataSize(lhsPixelBuffer)
let rhsSize = CVPixelBufferGetDataSize(rhsPixelBuffer)
if lhsSize != rhsSize {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return false
}
let lhsBuffer = lhsPointer!.assumingMemoryBound(to: UInt8.self)
let rhsBuffer = rhsPointer!.assumingMemoryBound(to: UInt8.self)
for i in 0..<lhsSize {
if lhsBuffer[i] != rhsBuffer[i] {
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return false
}
}
CVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
CVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0))
return true
}
```let lhsPixelBuffer = CVPixelBuffer(pixelBuffer: lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(pixelBuffer: rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersCVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0)) // cannot find 'CVPixelBufferUnlockFlags' in scopeCVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0)) // cannot find 'CVPixelBufferUnlockFlags' in scopeCVPixelBufferUnlockBaseAddress(lhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0)) // cannot find 'CVPixelBufferUnlockFlags' in scopeCVPixelBufferUnlockBaseAddress(rhsPixelBuffer, CVPixelBufferUnlockFlags(rawValue: 0)) // cannot find 'CVPixelBufferUnlockFlags' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
if lhsBaseAddress == nil || rhsBaseAddress == nil {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
return lhsData == rhsData
}```swift
import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let lhsPixelBuffer = CVPixelBuffer(lhs)
let rhsPixelBuffer = CVPixelBuffer(rhs)
if CVPixelBufferGetPixelFormatType(lhsPixelBuffer) != CVPixelBufferGetPixelFormatType(rhsPixelBuffer) {
return false
}
if CVPixelBufferGetWidth(lhsPixelBuffer) != CVPixelBufferGetWidth(rhsPixelBuffer) || CVPixelBufferGetHeight(lhsPixelBuffer) != CVPixelBufferGetHeight(rhsPixelBuffer) {
return false
}
let lhsBaseAddress = CVPixelBufferGetBaseAddress(lhsPixelBuffer)
let rhsBaseAddress = CVPixelBufferGetBaseAddress(rhsPixelBuffer)
if lhsBaseAddress == nil || rhsBaseAddress == nil {
return false
}
let lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhsPixelBuffer)
let rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhsPixelBuffer)
if lhsBytesPerRow != rhsBytesPerRow {
return false
}
let lhsData = Data(bytes: lhsBaseAddress!, count: lhsBytesPerRow * CVPixelBufferGetHeight(lhsPixelBuffer))
let rhsData = Data(bytes: rhsBaseAddress!, count: rhsBytesPerRow * CVPixelBufferGetHeight(rhsPixelBuffer))
return lhsData == rhsData
}
```let lhsPixelBuffer = CVPixelBuffer(lhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializerslet rhsPixelBuffer = CVPixelBuffer(rhs) // 'CVPixelBuffer' (aka 'CVBuffer') cannot be constructed because it has no accessible initializersstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}
```
This function uses Swift's `withUnsafeBufferPointer` method to get a pointer to the first element of the array of private structs. It then creates an `UnsafeBufferPointer` starting from this pointer and with the same count as the original array. Finally, it maps each private struct to a public struct by directly accessing the `value` field of the private struct, and returns the resulting array of public structs.return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) }) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: items.count)
defer { pointer.deallocate() }
for (index, item) in items.enumerated() {
pointer.advanced(by: index).pointee = item
}
let buffer = UnsafeBufferPointer(start: pointer, count: items.count)
return Array(buffer)
}```swift
let pointer = UnsafeMutablePointer<PrivateItem>.allocate(capacity: items.count)
defer { pointer.deallocate() }
for (index, item) in items.enumerated() {
pointer.advanced(by: index).pointee = item
}
let buffer = UnsafeBufferPointer(start: pointer, count: items.count)
return Array(buffer)
}
```return Array(buffer) // cannot convert return expression of type 'Array<PrivateItem>' to return type '[PublicItem]'struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return Array(UnsafeBufferPointer(start: UnsafePointer<PrivateItem>(items), count: items.count)).map { PublicItem(value: $0.value) }
}```swift
return Array(UnsafeBufferPointer(start: UnsafePointer<PrivateItem>(items), count: items.count)).map { PublicItem(value: $0.value) }
}
```return Array(UnsafeBufferPointer(start: UnsafePointer<PrivateItem>(items), count: items.count)).map { PublicItem(value: $0.value) } // 'value' is inaccessible due to 'private' protection levelreturn Array(UnsafeBufferPointer(start: UnsafePointer<PrivateItem>(items), count: items.count)).map { PublicItem(value: $0.value) } // initialization of 'UnsafePointer<PrivateItem>' results in a dangling pointerstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}
```return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) }) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
return Array(UnsafeBufferPointer<PublicItem>(start: bufferPointer.baseAddress, count: bufferPointer.count))
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
return Array(UnsafeBufferPointer<PublicItem>(start: bufferPointer.baseAddress, count: bufferPointer.count))
}
}
```return Array(UnsafeBufferPointer<PublicItem>(start: bufferPointer.baseAddress, count: bufferPointer.count)) // cannot convert value of type 'UnsafePointer<PrivateItem>' to expected argument type 'UnsafePointer<PublicItem>'struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}
```return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) }) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafePointer = UnsafeRawPointer(bufferPointer.baseAddress!)
let count = bufferPointer.count
let size = MemoryLayout<PrivateItem>.size
let newPointer = unsafePointer.bindMemory(to: PublicItem.self, capacity: count)
let newBufferPointer = UnsafeBufferPointer(start: newPointer, count: count)
return Array(newBufferPointer)
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafePointer = UnsafeRawPointer(bufferPointer.baseAddress!)
let count = bufferPointer.count
let size = MemoryLayout<PrivateItem>.size
let newPointer = unsafePointer.bindMemory(to: PublicItem.self, capacity: count)
let newBufferPointer = UnsafeBufferPointer(start: newPointer, count: count)
return Array(newBufferPointer)
}
}
```let size = MemoryLayout<PrivateItem>.size // initialization of immutable value 'size' was never used; consider replacing with assignment to '_' or removing itstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafeBufferPointer = UnsafeBufferPointer(start: bufferPointer.baseAddress, count: bufferPointer.count)
return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) })
}
}
```return Array(unsafeBufferPointer.map { PublicItem(value: $0.value) }) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
let unsafeBuffer = UnsafeBufferPointer(start: &items, count: items.count)
let publicItems = Array(unsafeBuffer.map { PublicItem(value: $0.value) })
return publicItems
}```swift
let unsafeBuffer = UnsafeBufferPointer(start: &items, count: items.count)
let publicItems = Array(unsafeBuffer.map { PublicItem(value: $0.value) })
return publicItems
}
```let unsafeBuffer = UnsafeBufferPointer(start: &items, count: items.count) // initialization of 'UnsafeBufferPointer<PrivateItem>' results in a dangling buffer pointerlet unsafeBuffer = UnsafeBufferPointer(start: &items, count: items.count) // cannot pass immutable value as inout argument: 'items' is a 'let' constantstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.withUnsafeBufferPointer { bufferPointer in
let unsafePointer = bufferPointer.baseAddress!
let count = bufferPointer.count
return Array(UnsafeBufferPointer<PublicItem>(start: unsafePointer, count: count))
}
}```swift
return items.withUnsafeBufferPointer { bufferPointer in
let unsafePointer = bufferPointer.baseAddress!
let count = bufferPointer.count
return Array(UnsafeBufferPointer<PublicItem>(start: unsafePointer, count: count))
}
}
```return Array(UnsafeBufferPointer<PublicItem>(start: unsafePointer, count: count)) // cannot convert value of type 'UnsafePointer<PrivateItem>' to expected argument type 'UnsafePointer<PublicItem>'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else {
return .orderedSame
}
}Here is a Swift function that compares two version number strings and returns their ordering as a value of type ComparisonResult:
```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else {
return .orderedSame
}
}
```
This function first splits the version number strings into components using the dot separator. It then compares each component of the two version numbers. If it finds a component in the left version number that is greater than the corresponding component in the right version number, it returns `.orderedDescending`. If it finds a component in the left version number that is less than the corresponding component in the right version number, it returns `.orderedAscending`. If it doesn't find any such components, it compares the lengths of the version number components. If the left version number has more components, it returns `.orderedDescending`. If the right version number has more components, it returns `.orderedAscending`. If both version numbers have the same number of components, it returns `.orderedSame`. // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.split(separator: ".")
let rhsComponents = rhs.split(separator: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.split(separator: ".")
let rhsComponents = rhs.split(separator: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue < rhsValue {
return .orderedAscending
} else if lhsValue > rhsValue {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue < rhsValue {
return .orderedAscending
} else if lhsValue > rhsValue {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsInt = Int(lhsComponent) ?? 0
let rhsInt = Int(rhsComponent) ?? 0
if lhsInt > rhsInt {
return .orderedDescending
} else if lhsInt < rhsInt {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else {
return .orderedSame
}
}Here is a Swift function that compares two version number strings and returns their ordering as a value of type ComparisonResult:
```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsInt = Int(lhsComponent) ?? 0
let rhsInt = Int(rhsComponent) ?? 0
if lhsInt > rhsInt {
return .orderedDescending
} else if lhsInt < rhsInt {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else {
return .orderedSame
}
}
```
This function first splits the version number strings into arrays of components using the dot separator. Then it compares each component of the two version numbers. If it finds a component that is greater in the first version number, it returns `.orderedDescending`. If it finds a component that is greater in the second version number, it returns `.orderedAscending`. If it doesn't find any greater or smaller components, it compares the lengths of the version number arrays. If the first version number has more components, it returns `.orderedDescending`. If the second version number has more components, it returns `.orderedAscending`. If both version numbers have the same number of components, it returns `.orderedSame`. // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue < rhsValue {
return .orderedAscending
} else if lhsValue > rhsValue {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue < rhsValue {
return .orderedAscending
} else if lhsValue > rhsValue {
return .orderedDescending
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for i in 0..<max(lhsComponents.count, rhsComponents.count) {
let lhsValue = i < lhsComponents.count ? Int(lhsComponents[i]) ?? 0 : 0
let rhsValue = i < rhsComponents.count ? Int(rhsComponents[i]) ?? 0 : 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for i in 0..<max(lhsComponents.count, rhsComponents.count) {
let lhsValue = i < lhsComponents.count ? Int(lhsComponents[i]) ?? 0 : 0
let rhsValue = i < rhsComponents.count ? Int(rhsComponents[i]) ?? 0 : 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
return .orderedSame
}
```
This code defines an enum `ComparisonResult` to represent the three possible outcomes of a comparison: `orderedSame`, `orderedAscending`, and `orderedDescending`. The `compareVersions` function takes two version number strings as input and compares them using the semantic versioning specification. It splits the version strings into components and compares each component in order. If a component in the left-hand version is greater than the corresponding component in the right-hand version, it returns `.orderedDescending`. If it's less, it returns `.orderedAscending`. If all components are equal, it returns `.orderedSame`. // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
```
This code defines an enum `ComparisonResult` to represent the three possible outcomes of a comparison: `orderedSame`, `orderedAscending`, and `orderedDescending`. The `compareVersions` function takes two version number strings as input and compares them using the semantic versioning specification. It splits the version strings into components and compares each component in order. If a component is an integer, it compares the integers directly. If the components have different lengths, it considers the longer version number to be greater. If all components are equal, it considers the version numbers to be equal. // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
if let lhsInt = Int(lhsComponent), let rhsInt = Int(rhsComponent) {
if lhsInt < rhsInt {
return .orderedAscending
} else if lhsInt > rhsInt {
return .orderedDescending
}
}
}
if lhsComponents.count < rhsComponents.count {
return .orderedAscending
} else if lhsComponents.count > rhsComponents.count {
return .orderedDescending
}
return .orderedSame
}
``` // XCTAssertTrue failedenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
return .orderedSame
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
let lhsComponents = lhs.components(separatedBy: ".")
let rhsComponents = rhs.components(separatedBy: ".")
for (lhsComponent, rhsComponent) in zip(lhsComponents, rhsComponents) {
let lhsValue = Int(lhsComponent) ?? 0
let rhsValue = Int(rhsComponent) ?? 0
if lhsValue > rhsValue {
return .orderedDescending
} else if lhsValue < rhsValue {
return .orderedAscending
}
}
if lhsComponents.count > rhsComponents.count {
return .orderedDescending
} else if lhsComponents.count < rhsComponents.count {
return .orderedAscending
}
return .orderedSame
}
```
This code defines an `enum` called `ComparisonResult` to represent the three possible outcomes of a comparison: `orderedSame`, `orderedAscending`, and `orderedDescending`.
The `compareVersions` function takes two `String` parameters, `lhs` and `rhs`, representing the two version numbers to be compared. It first splits each version number string into an array of components using the `components(separatedBy:)` method.
Then, it iterates over the components of both version numbers using the `zip` function to compare each pair of corresponding components. If a pair of components is not equal, it returns the appropriate `ComparisonResult` based on their numerical values.
If all pairs of components are equal, it checks the length of the version number arrays. If one array is longer than the other, it returns the appropriate `ComparisonResult` based on their lengths.
If all pairs of components are equal and the length of the version number arrays is also equal, it returns `orderedSame`. // XCTAssertTrue failed