Subj : Re: Changing Object.prototype.toSource to use double-quotes everywhere
To   : zwetan
From : Brendan Eich
Date : Fri May 13 2005 10:27 am

Hi, your code is fine for trees, but it doesn't handle arbitrary object 
graphs (neither does JSON, but you wouldn't want a "Too much recursion" 
error for the edge case).

Also, why not use === undefined and === null, rather than == "undefined" 
and == "null" in Object.prototype.toJSONString?  A JS string whose 
characters are the sequence "undefined" should not be turned into the 
undefined value when serialized via JSON, it seems to me.

/be

.