在Swift中，Array [String]切片返回类型似乎不是[String] [英] In Swift, Array [String] slicing return type doesn't seem to be [String]

问题描述

我正在切割一个字符串数组并将其设置为 [String] 变量，但类型检查器正在抱怨。这是一个可能的编译器错误吗？

I'm slicing an array of strings and setting that to a [String] variable, but the type checker is complaining. Is it a possible compiler bug?

var tags = ["this", "is", "cool"]
tags[1..<3]
var someTags: [String] = tags[1..<3]

推荐答案

使用范围订阅数组不会返回数组，而是返回切片。您可以从该切片创建一个数组。

Subscripting an array with a range doesn't return an array, but a slice. You can create an array out of that slice though.

var tags = ["this", "is", "cool"]
tags[1..<3]
var someTags: Slice<String> = tags[1..<3]
var someTagsArray: [String] = Array(someTags)

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