在Javascript维护阵列秩序 [英] Maintaining array order in Javascript

问题描述

我是新来的JavaScript，我有麻烦我的数组的工作，我想我的数组排序我如何明确写入它，而不是如何JavaScript的决定需要它。

I am new to JavaScript and I am having trouble working with my array, I want my array ordered how I explicitly write it and not how JavaScript decides it wants it.

如果我们有一个阵列

var array = {
    0: 'zero',
    4: 'four',
    2: 'two'
};

当我选择在控制台中显示此，或迭代它，它的重新排序像这样

When I choose to display this in the console, or iterate over it, Its reordered like this

array = {
    0: 'zero',
    2: 'two',
    4: 'four'
};

我已经试过2个循环，到目前为止，for循环，也是在语句的循环。
根据双方的工作，我如何假定他们会因为它们使用一个键和在那里工作的方式上/下，为了使我指定的是绝对没有用的。

I have tried 2 loops so far, The for loop, and also the for loop with the in statement. Both work according how I assumed they would as they use a key and work there way up/down, making order I specify is absolutely useless.

我怎么能写/打印/工作与我的数组作为其排序，在其他语言如PHP的那样简单。

How can I write/print/work with my array as its ordered, In other languages such as PHP its as simple as

$array = array(
    0 => 'zero',
    4 => 'four',
    2 => 'two'
);

foreach($array as $key => $value)
    echo $key ."\n";

这将输出

0
4
2

先谢谢了。

推荐答案

您正在使用对象 {} ，而不是一个数组 [] 。对象没有明确的顺序，其中阵列做。这就是为什么你遇到你的问题。更改 {} 到 [] ，你会没事的。你甚至可以使用对象的数组。

You're using an object {}, not an array []. Objects have no explicit order, where Arrays do. That's why you're having your problem. Change your {} to [] and you'll be fine. You could even use an array of objects.

var array = [
    {0: 'zero'}, 
    {4: 'four'}, 
    {2: 'two'}
];

在循环，像这样

for(var i = 0; i < array.length; i++){
  console.log(array[i]);
}

为我们提供了我们的正常秩序。

Gives us our normal order.

Object {0: "zero"}
Object {4: "four"}
Object {2: "two"} 

另一个编辑：问题是你想拥有一个具有属性和值，就像一个对象的数组，而不使用对象，{属性：值} - 它真的不能用一个数组来完成。要遍历像你想一个数组，它是那样简单

Another The problem is you're trying to have an array that has properties and values just like an object, without using an object, {property: value} - that can't really be done with an array. To loop over an array like you want, it's as simple as

var arr = [1,2,3]

和

for(var i = 0; i < arr.length; i++){
  console.log(i) //1,2,3
}

但问题，如上面提到的，就是你要更复杂阵列，你根本就做不到。

but the problem, like mentioned above, is you want more complex arrays which you simply can't do.

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