Subj : Re: define new function in Class String (Spidermonkey)
To   : Blaubaer
From : Brendan Eich
Date : Tue Jan 04 2005 11:00 pm

Blaubaer wrote:
> I want to add the function sprintf to the String type.
> var a = new String();
> a.sprintf("Integer: %d", 1);
> 
> My function sprintf works, an returns the result, but I also want to change 
> the value of "a".


That's wastefully expressed.  Strings are not objects in JS (string is a 
primitive type: typeof "hi" == "string", typeof new String("hi") == 
"object").  It requires var a = new String() before the guts of the 
idea, for no purpose.

It would be better to make a global sprintf function, or if you want to 
put it in a poor-man's namespace, make it a static: String.sprintf.

/be

.