Subj : Re: how to create an instance of class whose name is dynamic?
To   : netscape.public.mozilla.jseng
From : Jun Yang
Date : Wed Aug 31 2005 06:34 pm

Thanks, Brendan!

Jun

Brendan Eich wrote:
> Jun Yang wrote:
> 
>> Hi all,
>>
>> I have something like below.
>>
>> function create(className)
>> {
>>     return new <className>;
>> }
>>
>> Of course this is illegal in JavaScript.  How can I create an instance 
>> of a class whose name is dynamic?
> 
> 
> Several ways:
> 
> 1.  If the name is the value of a property in an object, you can say new 
> obj[className] (or new obj[className](...) if there are arguments to pass).
> 
> 2.  Use eval.  1 is cheaper, so you should avoid this if you can.
> 
> /be

.