实例方法
filter(_:)
返回一个数组,该数组按顺序包含满足给定谓词的序列元素。
声明
func filter(_ isIncluded: (Self.Element) throws -> Bool) rethrows -> [Self.Element]
返回值
isIncluded
允许的元素数组。
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,指示该元素是否应包含在返回的数组中。
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+
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