解构数组获得第二个值? [英] Destructuring array get second value?

问题描述

如何使用销毁获取数组?

How to get array using destructing?

const num = [1,2,3,4,5];
const [ first ] = num; //1

console.log(first)我可以得到1，但是当我尝试执行const [ null, second ] = num时，它具有预期的令牌错误.如何获得num数组的第二项?

console.log(first) I'm able to get 1, but when I try to do const [ null, second ] = num it has expected token error. How to get 2nd item of num array?

推荐答案

您只需输入逗号即可跳过参数名称

You can skip parametr name just by putting comma

var num = [1, 2, 3, 4, 5];
var [ ,x] = num;

了解更多: https://developer.mozilla.org/en -US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment#Ignoring_some_returned_values 忽略一些返回值

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