数组内的Javascript数组-如何调用子数组名称? [英] Javascript Array inside Array - how can I call the child array name?

问题描述

这是我正在做的事的例子:

Here is the example of what I am doing:

   var size = new Array("S", "M", "L", "XL", "XXL");
   var color = new Array("Red", "Blue", "Green", "White", "Black");
   var options = new Array( size, color);

我正在做一个循环选择形式的事情，效果很好，但是在这种情况下，我想获取Array子名称-大小或颜色.当我做alert(options [0])时，我得到了数组的整个元素.但是对于某些特定情况，我只想获取数组名，就像我已经说过的那样，它是大小/颜色.有办法实现吗?

I am doing a loop select form thingies which work good, but I want to fetch the Array child name, in this case - size or color. When I am doing alert(options[0]), I get the whole elements of array. But for some specific case, I want to get only the array name, which is size/color like I have said already. Is there way to achieve that?

推荐答案

我会创建一个像这样的对象:

I would create an object like this:

var options = { 
    size: ["S", "M", "L", "XL", "XXL"],
    color: ["Red", "Blue", "Green", "White", "Black"]
};


alert(Object.keys(options));

要单独访问密钥:

for (var key in options) {
    alert(key);
}

P.S .:创建新数组对象时，请勿使用 new Array ，而应使用 [] .

P.S.: when you create a new array object do not use new Array use [] instead.

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