获取对象键的数组 [英] Get array of object's keys

问题描述

我想将JavaScript对象的键作为数组获取，无论是jQuery还是纯JavaScript。

I would like to get the keys of a JavaScript object as an array, either in jQuery or pure JavaScript.

是否有比这更简洁的方法？

Is there a less verbose way than this?

var foo = { 'alpha' : 'puffin', 'beta' : 'beagle' };
var keys = [];
for (var key in foo) {
    keys.push(key);
}

推荐答案

var foo = { 'alpha' : 'puffin', 'beta' : 'beagle' };
var keys = Object.keys(foo); // ['alpha', 'beta'] 
// (or maybe some other order, keys are unordered).

使用 Object.keys 。

这是ES5功能。这意味着它适用于所有现代浏览器，但不适用于旧版浏览器。

This is an ES5 feature. This means it works in all modern browsers but will not work in legacy browsers.

ES5-shim有实施 Object.keys 你可以偷窃

The ES5-shim has a implementation of Object.keys you can steal

这篇关于获取对象键的数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！