ios - Swift - 修剪数组中的字符串

Question

我有一个 String Array 需要修剪每个字符串中的空格.. 请让我知道任何简单的方法，而无需将它们循环到 for 循环中。

例如:["Apple", "Bike", "Cat", "Dog"] 我有一个这样的 Array。我希望修剪所有这些空间。

Answer 1

这是一个很好的 map 应用程序。使用它获取数组中的每个项目并应用 trimmingCharacters(in:) 删除字符串末尾的空格。

import Foundation // or UIKit or Cocoa

let array =  ["Apple ", "Bike ", " Cat", " Dog "]
let trimmed = array.map { $0.trimmingCharacters(in: .whitespaces) }

print(trimmed)  // ["Apple", "Bike", "Cat", "Dog"]

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@DuncanC 的评论很重要，所以我在这里强调一下:

@vacawama's use of the map statement is certainly more "Swift-like" than using a for loop, but I bet the performance is all but identical. There is no magic here. If you need to check all the strings in an array and trim leading/trailing spaces then you need to iterate through all the strings. That is what the map statement does internally. It just uses functional rather than imperative syntax.