用Javascript创建数组 [英] Creating arrays in Javascript

问题描述

我对javascript并不陌生，在用JavaScript制作2d(或者也许我可能需要3d)数组时，我遇到了很多麻烦.

I am little new to javascript and I am having alittle trouble wrapping my head around making a 2d (or maybe i might need a 3d) array in javascript.

我目前需要收集2条信息:一个ID和一个值，因此我创建了以下内容:

I currently have 2 pieces of information i need to collect: an ID and a value so I created the following:

var myArray = [];

var id = 12;
var value = 44;

myArray[id]=value;

但是我意识到这不容易像for循环那样遍历整个数组，所以我想到了这一点:

But I realized that this is not easy to loop through the array like a for loop so i was thinking of this:

myArray[myArray.length] = id;
myArray[myArray.length-1][id]=value;

我想这样做，以便在for循环中我可以轻松获得id和值，但是以上内容仅在我循环遍历时返回该值.关于如何使它正常工作的任何建议，或者有更好的方法吗?

I wanted to do this so that in a for loop i could get the ids and the values easily but the above only returns the value when i loop through it. Any suggestions on how to get this working or is there a better way to do this?

谢谢

推荐答案

为什么不使用对象哈希是吗?这种方法允许您以key:value格式存储多个值:

Why not use an array of object hashes? This approach allows you to store multiple values in a key:value format:

var myArray = [];
var myElement = {
  id: 12,
  value: 44
}

myArray[0] = myElement;

然后您可以像这样循环遍历myArray中的所有元素:

You could then loop through all of the elements in myArray like so:

var i = 0,
    el;

while (el = myArray[i++]) {
  alert(el.id + '=' + el.value);
}

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