使用Prototype在javascript中迭代对象的每个属性？ [英] Iterating over every property of an object in javascript using Prototype?

问题描述

有没有办法使用Prototype JavaScript框架迭代对象的每个属性？

Is there a way to iterate over every property of an object using the Prototype JavaScript framework?

以下是这种情况：我在JSON中获得了一个AJAX响应类似这样的事情：

Here's the situation: I am getting an AJAX response in JSON that looks something like this:

{foo: 1, bar: 2, barobj: {75: true, 76: false, 85: true}}

如果我将json响应评估为变量 response ，我希望能够遍历 response.barobj 对象中的每个属性，以查看哪些索引为true，哪些索引为false。

If I evaluate that json response in to a variable response, I want to be able to iterate over each property in the response.barobj object to see which indexes are true and which are false.

Prototype同时具有 Object.keys（）和 Object.values（）但奇怪的是似乎没有一个简单的 Object.each（）函数！当我迭代一个时，我可以获取Object.keys（）和Object.values（）的结果并交叉引用另一个，但这是一个黑客，我相信有一个正确的方法来做到这一点！

Prototype has both Object.keys() and Object.values() but oddly seems to not have a simple Object.each() function! I could take the results of Object.keys() and Object.values() and cross-reference the other as I iterate through one, but that is such a hack that I am sure there is a proper way to do it!

推荐答案

你必须先将对象文字转换为原型哈希：

// Store your object literal
var obj = {foo: 1, bar: 2, barobj: {75: true, 76: false, 85: true}}

// Iterate like so.  The $H() construct creates a prototype-extended Hash.
$H(obj).each(function(pair){
  alert(pair.key);
  alert(pair.value);
});

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