实例方法
contains(_:)
返回一个布尔值,指示序列是否包含给定元素。
声明
func contains(_ element: Self.Element) -> Bool
当
Element
符合 Equatable
时可用。返回值
true
如果在序列中找到该元素;否则,false
。
参数
element
要在序列中查找的元素。
详述
此示例检查最喜欢的演员是否在存储电影演员的数组中。
let cast = ["Vivien", "Marlon", "Kim", "Karl"]
print(cast.contains("Marlon"))
// Prints "true"
print(cast.contains("James"))
// Prints "false"
可用版本
iOS 8.0+, iPadOS 8.0+, macOS 10.10+, Mac Catalyst 13.0+, tvOS 9.0+, watchOS 2.0+
相关用法
- Swift UnsafeBufferPointer contains(where:)用法及代码示例
- Swift UnsafeBufferPointer compactMap(_:)用法及代码示例
- Swift UnsafeBufferPointer randomElement()用法及代码示例
- Swift UnsafeBufferPointer min(by:)用法及代码示例
- Swift UnsafeBufferPointer prefix(upTo:)用法及代码示例
- Swift UnsafeBufferPointer firstIndex(of:)用法及代码示例
- Swift UnsafeBufferPointer map(_:)用法及代码示例
- Swift UnsafeBufferPointer suffix(_:)用法及代码示例
- Swift UnsafeBufferPointer indices用法及代码示例
- Swift UnsafeBufferPointer last用法及代码示例
- Swift UnsafeBufferPointer elementsEqual(_:)用法及代码示例
- Swift UnsafeBufferPointer min()用法及代码示例
- Swift UnsafeBufferPointer last(where:)用法及代码示例
- Swift UnsafeBufferPointer shuffled()用法及代码示例
- Swift UnsafeBufferPointer prefix(_:)用法及代码示例
- Swift UnsafeBufferPointer split(separator:maxSplits:omittingEmptySubsequences:)用法及代码示例
- Swift UnsafeBufferPointer lastIndex(of:)用法及代码示例
- Swift UnsafeBufferPointer filter(_:)用法及代码示例
- Swift UnsafeBufferPointer prefix(through:)用法及代码示例
- Swift UnsafeBufferPointer isEmpty用法及代码示例
- Swift UnsafeBufferPointer flatMap(_:)用法及代码示例
- Swift UnsafeBufferPointer starts(with:)用法及代码示例
- Swift UnsafeBufferPointer shuffled(using:)用法及代码示例
- Swift UnsafeBufferPointer reduce(_:_:)用法及代码示例
- Swift UnsafeBufferPointer index(_:offsetBy:)用法及代码示例
注:本文由纯净天空筛选整理自apple.com大神的英文原创作品 UnsafeBufferPointer contains(_:)。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。