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+
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注:本文由纯净天空筛选整理自apple.com大神的英文原创作品 LazyMapSequence.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。