将带有数字键的 JavaScript 对象转换为数组 [英] Converting JavaScript object with numeric keys into array

问题描述

我有一个像这样的对象作为来自服务器的 JSON 响应返回:

{0":1"，1":2"，2":3"，3":4"}

我想把它转换成这样的 JavaScript 数组:

[1"、2"、3"、4"]

有没有最好的方法来做到这一点?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?

解决方案

实际上使用 jQuery 的 非常简单$.map

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

FIDDLE

并且在没有 jQuery 的情况下也几乎同样简单，将键转换为数组，然后使用 Array.map

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

小提琴

假设它已经被解析为一个 javascript 对象，并且实际上不是 JSON，它是一种字符串格式，在这种情况下，还需要运行 JSON.parse.>

在 ES2015 中有 Object.值 到救援，这让这变得轻而易举

var arr = Object.values(obj);

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

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

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

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

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?

解决方案

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

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

FIDDLE

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

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.

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

var arr = Object.values(obj);

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