在 JavaScript 中将数组解包为单独的变量 [英] Unpacking array into separate variables in JavaScript

问题描述

这是一个简单的问题，我以前做过.我只是不记得它是如何命名的，或者它到底叫什么.

This is a simple problem, and I've done it before. I just can't remember how, or what exactly it was called.

在python中我可以这样做:

In python I can do this:

arr = ['one', 'two']
one, two = arr

我如何在 JavaScript 中做到这一点?

how do I do that in JavaScript?

推荐答案

这是 AFAIK 目前唯一的跨浏览器兼容解决方案:

This is currently the only cross-browser-compatible solution AFAIK:

var one = arr[0],
    two = arr[1];

<小时>

ES6 将允许解构赋值:

---

ES6 will allow destructuring assignment:

let [x, y] = ['foo', 'bar'];
console.log(x); // 'foo'
console.log(y); // 'bar'

或者，坚持你最初的例子:

Or, to stick to your initial example:

var arr = ['one', 'two'];
var [one, two] = arr;

您也可以创建一个默认值:

You could also create a default value:

const [one = 'one', two = 'two', three = 'three'] = [1, 2];
console.log(one); // 1
console.log(two); // 2
console.log(three); // 'three'

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