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import SwiftUI | |
struct TotalPricePreferenceKey: PreferenceKey { | |
static var defaultValue: Double = 0.0 | |
static func reduce(value: inout Double, nextValue: () -> Double) { | |
value += nextValue() | |
} | |
} |
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✅ struct KeyColorPreferenceKey: PreferenceKey { | |
static var defaultValue: Color = .white | |
static func reduce(value: inout Color, nextValue: () -> Color) { | |
value = nextValue() | |
} | |
} | |
struct ContentView: View { |
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import DequeModule | |
struct Stack<T> { | |
private var deque: Deque<T> = [] | |
var top: T? { deque.last } | |
mutating func push(_ element: T) { | |
deque.append(element) | |
} |
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struct Stack<T> { | |
private var array: [T] = [] | |
var top: T? { array.last } | |
mutating func push(_ element: T) { | |
array.append(element) | |
} | |
mutating func pop() -> T? { |
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import RegexBuilder | |
let regex = Regex { | |
"Hi, WWDC" | |
Capture { | |
Repeat(.digit, count: 2) | |
} | |
"!" | |
} |
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import RegexBuilder | |
let regex = Regex { | |
"Hi, WWDC" | |
Repeat(.digit, count: 2) | |
"!" | |
} | |
let input = "Hi, WWDC21! Hi, WWDC22! Hi Hello" |
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import RegexBuilder | |
let regex = Regex { | |
"Hi, WWDC" | |
Repeat(.digit, count: 2) | |
"!" | |
} | |
let input = "Hi, WWDC21! Hi, WWDC22! Hi Hello" |
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import RegexBuilder | |
let regex = Regex { | |
"Hi, WWDC" | |
Repeat(.digit, count: 2) | |
"!" | |
} |
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@available(macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0, *) | |
extension Regex { | |
public init<Content>(@RegexComponentBuilder _ content: () -> Content) where Output == Content.RegexOutput, Content : RegexComponent | |
} |
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let regex = /Hi, WWDC\d{2}!/ |
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