Swift filter 函数
2023-01-04 本文已影响0人
大刘
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// @inlinable public func filter(_ isIncluded: (Element) throws -> Bool) rethrows -> [Element]
let array = [-5, 4, -3, 1, 2]
var resultArray = array.filter { (item) -> Bool in
return item > 0
}
print(resultArray) // [4, 1, 2]
// 语法糖写法
resultArray = array.filter {
$0 > 0
}
print(resultArray) // [4, 1, 2]
