执行一个foreach在关联数组的关联数组 [英] Performing a foreach over an associative array of associative arrays

问题描述

假设我有这样的设置：

var whatever = new Array();

whatever["a"] = new Array();
whatever["a"]["a"] = "test1";
whatever["a"]["b"] = "test2";

whatever["b"] = new Array();
whatever["b"]["a"] = "test3";
whatever["b"]["b"] = "test4";

我试图来遍历它：

And I attempt to iterate through it:

$.each(whatever, function(key, value) {
 $.each(value, function(subkey, subvalue) {
  //stuff with key, subkey, and subvalue here
 });
});

然而，迭代失败，注释掉嵌套的foreach循环将允许网页加载，这样似乎是问题的所在。

Yet the iteration fails, commenting out the nested foreach loop will allow the page to load, so that appears to be where the problem is.

第一个循环里面，我可以这样做：

Inside the first loop, I can do something like:

alert(value["a"]);

和接收适当的值，因此它似乎是一个有效的数组。我要去哪里错了，因为嵌套循环基本上是一样的外层？

and receive the proper value, so it seems to be a "valid" array. Where am I going wrong, since the nested loop is basically the same as the outer one?

推荐答案

使用对象而不是数组。

var whatever = {};

whatever["a"] = {};
whatever["a"]["a"] = "test1";
whatever["a"]["b"] = "test2";

whatever["b"] = {};
whatever["b"]["a"] = "test3";
whatever["b"]["b"] = "test4";

http://jsfiddle.net/QwT8W/

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