How to clear a object from memory using JavaScript [duplicate]

This question already has answers here: Closed 10 years ago.

Possible Duplicate:

Deleting Objects in JavaScript

This is the demo code:

开发者_如何学Python

function a(){
    this.a='aaa'
}
var aa=new a

How to clear the aa object from the memory?

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I may be wrong but I think setting the variable to null should do the trick.

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set aa = null, alert(aa)!