JavaScript：如何从多维数组中获取值？ [英] JavaScript: How to Get the Values from a Multi-Dimensional Array?

问题描述

我正在尝试从多维数组中获取值。这就是我到目前为止所拥有的。

当我选择数组中的第一个选项时，我需要99的值和图像，例如Billy Joel。

I'm trying to get the values from a multi-dimensional array. This is what I have so far.
I need the value of 99 and the image when I select the first option in the array, e.g. "Billy Joel".

var concertArray = [
    ["Billy Joel", "99", "equal.png"],
    ["Bryan Adams", "89", "higher.png"],
    ["Brian Adams", "25", "lower.png"]
];

function populate(){
    for(i = 0; i < concertArray.length; i++){
        var select = document.getElementById("test");
        select.options[select.options.length] = new Option(concertArray[i][0], concertArray[i][1]);
    }
}

推荐答案

你可以尝试将多维数组转换为这样的对象数组：

You can try to transform the multi-dimensional array to an array of objects like this:

var concertArray = [
    {name: "Billy Joel", value: 99, image: "equal.png"},
    {name: "Bryan Adams", value: 89, image: "higher.png"},
    {name: "Brian Adams", value: 25, image: "lower.png"}
];

然后您可以像常规对象一样访问数组中的项目：

Then you can access the items in the array like regular objects:

var concertName = concertArray[0].name;
var concertPrice = parseFloat(concertArray[0].value);
var concertImage = concertArray[0].image;

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