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 LazyPrefixWhileSequence.Iterator contains(where:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator compactMap(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator reduce(_:_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator enumerated()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator next()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator allSatisfy(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator dropLast(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator flatMap(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator first(where:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator sorted(by:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator lexicographicallyPrecedes(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator joined()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator starts(with:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator prefix(while:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator shuffled()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator dropFirst(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator split(maxSplits:omittingEmptySubsequences:whereSeparator:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator filter(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator min(by:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator min()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator sorted()用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator elementsEqual(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator forEach(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator map(_:)用法及代码示例
- Swift LazyPrefixWhileSequence.Iterator split(separator:maxSplits:omittingEmptySubsequences:)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 LazyPrefixWhileSequence.Iterator 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。