iOS swift 从另一个数组中删除数组的元素 [英] iOS swift remove elements of an array from another array

问题描述

我有两个数组

var array1 = new Array ["a", "b", "c", "d", "e"]
var array2 = new Array ["a", "c", "d"]

我想从 array1 中删除 array2 的元素

I want to remove elements of array2 from array1

Result ["b", "e"]

推荐答案

最简单的方法是将两个数组都转换为集合，从第一个中减去第二个，将结果转换为数组并赋值回数组1:

The easiest way is to convert both arrays to sets, subtract the second from the first, convert to the result to an array and assign it back to array1:

array1 = Array(Set(array1).subtracting(array2))

请注意，您的代码不是有效的 Swift - 您可以使用类型推断来声明和初始化两个数组，如下所示:

Note that your code is not valid Swift - you can use type inference to declare and initialize both arrays as follows:

var array1 = ["a", "b", "c", "d", "e"]
var array2 = ["a", "c", "d"]

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