使用数字键将JavaScript对象转换为数组 [英] Converting JavaScript object with numeric keys into array

问题描述

我有一个这样的对象作为服务器的JSON响应返回：

I have an object like this coming back as a JSON response from the server:

{"0":"1","1":"2","2":"3","3":"4"}

我想将它转换为这样的JavaScript数组：

I want to convert it into a JavaScript array like this:

["1","2","3","4"]

有最好的方法吗？无论我在哪里阅读，人们都在使用循环来使用复杂的逻辑。那么有没有其他方法可以做到这一点？

Is there a best way to do this? Wherever I am reading, people are using complex logic using loops. So are there alternative methods to doing this?

推荐答案

它实际上非常直接用jQuery的 $。map

It's actually very straight forward with jQuery's $.map

var arr = $.map(obj, function(el) { return el });

FIDDLE

并且在没有jQuery的情况下也几乎一样容易，将键转换为数组，然后将值映射回来 数组。地图

and almost as easy without jQuery as well, converting the keys to an array and then mapping back the values with Array.map

var arr = Object.keys(obj).map(function(k) { return obj[k] });

FIDDLE

假设它已经被解析为javascript对象，实际上并不是JSON，这是一个字符串格式，在这种情况下，也需要运行 JSON.parse 。

That's assuming it's already parsed as a javascript object, and isn't actually JSON, which is a string format, in that case a run through JSON.parse would be necessary as well.

在ES2015中有< a href =https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values =noreferrer> Object.values 救援，这使得这一切变得轻而易举

In ES2015 there's Object.values to the rescue, which makes this a breeze

var arr = Object.values(obj);

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