Subj : Re: Using 'apply' to construct an object
To   : netscape.public.mozilla.jseng
From : Brendan Eich
Date : Tue Aug 30 2005 01:07 pm

franck wrote:
> In fact, I want to create an object ( new myClass... ) with a variable 
> argument list ( ...apply( xxx, myListOfArguments ) )
> 
> An alternative way to achieve this is :
> 
>   new myClass( args[0], args[1], args[2], args[3], args[4], ... args[n] );
> 
> But the constructor of the object I am trying to create failed if I 
> provide more than the expected number of arguments.
> 
> myClass is a native JSClass class ( wxDialog(Parent, Id, Title [, 
> Position, Size, Style]) )


You are quite right that it's not possible to combine new with apply, 
unfortunately.  We hit this working on Narcissus 
(http://lxr.mozilla.org/mozilla/source/js/narcissus/jsexec.js -- look 
for __construct__).

This is something to work around for now, as you propose and as we did 
for Narcissus.  We'll fix it for Edition 4 / JS2.

/be

.