使用数组表示法了解何时将属性设置为对象
我有一个用作哈希表的对象，用于在 javascript 中存储键值对：
Storage["key"] = "value".
我发现我们可以使用 DefineSetter 为每个键设置设置器，但是，我们需要事先知道所有键名称。每当以这种方式设置值时，是否有办法执行某些操作？
例如，在执行以下操作时：
Storage["key"] = "value";
我希望它由自定义方法处理，例如：
customMethod : function(aKey, aValue) {
//do something with these two params
// inform somebody else about this.
}
想法/建议？
I have an object that is used as a hash table to store key value pairs in javascript:
Storage["key"] = "value".
I've found we can use defineSetter to have setters for each key, however, we need to know all key names beforehand. Is there a way of doing something whenever a value is set this way?
So for example, when doing:
Storage["key"] = "value";
I want it to be handled by a custom method like:
customMethod : function(aKey, aValue) {
//do something with these two params
// inform somebody else about this.
}
Thoughts/Suggestions?
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不，目前没有办法捕获所有属性分配。 Firefox 4 引入了一个实验性的 JavaScript Proxy API，它允许您执行此操作（让代理将所有调用转发到内部对象，但在设置属性时也会触发一些额外的操作）但这里可能有点矫枉过正 - 即使这个 API 是稳定的并且在其他浏览器中实现了。
No, there isn't currently a way to catch all property assignments. Firefox 4 introduced an experimental JavaScript Proxy API which would allow you to do this (have a proxy forward all calls to an inner object but also trigger some additional action when properties are set) but it would probably be an overkill here - even if this API were stable and implemented in other browsers.
您可以覆盖对象的
__defineSetter__以获得更精细的控制。警告：不适用于所有浏览器！有关更多详细信息，请参阅此帖子：John Resig：JavaScript Getters 和 Setters
You can override
__defineSetter__of the object to gain finer control. Caveat: Won't work in all browsers!See this post for more details: John Resig: JavaScript Getters and Setters