Subj : Re: Enumeration of extended properties of Array and Object prototypes
To   : Chris Zumbrunn <chris@deployzone.com>
From : Brendan Eich <brendan@meer.net>
Date : Fri Mar 19 2004 08:59 pm

Chris Zumbrunn wrote:

> Yes, I know that :-)  

Ok, good to know -- it wasn't totally clear (maybe I was being dense) 
from your original posting.

> Getting back to my original question... 
> 
> Is a change to this being considered for JS 2.0 (and the next ECMA 
> specs). Is any way being considered that would allow to add members to 
> objects, particularly prototype objects, without them being enumerated 
> by for/in loops? This could for example also be in the form...
> 
> dontenum Array.prototype.foo;
> 
> ...or something of that nature, if that helps to avoid backwards 
> compatibility headaches.

See 
http://www.mozilla.org/js/language/js20/core/definitions.html#visibility-attributes.

Why do you want this, exactly?  For what purpose?

/be

.