实例方法
filter(_:)
返回一个相同类型的新集合,按顺序包含原始集合中满足给定谓词的元素。
声明
func filter(_ isIncluded: (Self.Element) throws -> Bool) rethrows -> Self
返回值
isIncluded
允许的元素的集合。
参数
isIncluded
一个闭包,它将序列的一个元素作为其参数并返回一个布尔值,该值指示该元素是否应包含在返回的集合中。
详述
在此示例中,filter(_:)
仅用于包含少于五个字符的名称。
let cast = ["Vivien", "Marlon", "Kim", "Karl"]
let shortNames = cast.filter { $0.count < 5 }
print(shortNames)
// Prints "["Kim", "Karl"]"
可用版本
iOS 8.0+, iPadOS 8.0+, macOS 10.10+, Mac Catalyst 13.0+, tvOS 9.0+, watchOS 2.0+, Swift 4.0+
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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 String.UnicodeScalarView filter(_:)。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。