在特定位置的JSON对象中插入属性[重复]

Possible Duplicate:
Does JavaScript Guarantee Object Property Order?

可能重复：JavaScript是否保证对象属性顺序？

I would like to know how I can insert a JSON object property at a specific position? Let's assume this Javascript object:

我想知道如何在特定位置插入JSON对象属性？让我们假设这个Javascript对象：

var data = {
  0: 'lorem',
  1: 'dolor sit',
  2: 'consectetuer'
}

I have an ID and a string, like:

我有一个ID和一个字符串，如：

var id = 6;
var str = 'adipiscing';

Now, I would like to insert the id between 0 and 1 (for example) and it should be like:

现在，我想插入0和1之间的id（例如），它应该像：

data = {
  0: 'lorem',
  6: 'adipiscing',
  1: 'dolor sit',
  2: 'consectetuer'
}

How can I do this? Is there any jQuery solution for this?

我怎样才能做到这一点？有没有任何jQuery解决方案？

1 个解决方案

#1

To specify an order in which elements of an object are placed, you'll need to use an array of objects, like this:

要指定放置对象元素的顺序，您需要使用对象数组，如下所示：

data = [
    {0: 'lorem'},
    {1: 'dolor sit'},
    {2: 'consectetuer'}
]

You can then push a element to a certain position in the array:

然后，您可以将元素推送到数组中的某个位置：

// Push {6: 'adipiscing'} to position 1
data.splice(1, 0, {6: 'adipiscing'})

// Result:
data = [
    {0: 'lorem'},
    {6: 'adipiscing'},
    {1: 'dolor sit'},
    {2: 'consectetuer'}
]
// Access it:
data[0][0] //"lorem"

However, this will render the indices you've specified ({0:) pretty much useless.

但是，这将呈现您指定的索引（{0 :)几乎没用。

#1