From: Ezra Zygmuntowicz <ezmobius@...>
Date: 2007-10-21T15:38:15+09:00
Subject: Re: Anonymous classes?


On Oct 20, 2007, at 10:28 PM, Ben Tilly wrote:

> Here is what I'd like to do.
>
>   anonymous_class = class.new;
>
>   # somehow define methods on anonymous_class
>
>   # somehow create an object of type anonymous_class
>
> And I'm running into a roadblock.  I can create an anonymous class
> easily enough, I just can't figure out how to define methods on it.
> Like initialize.  Or create objects of that type.
>
> Yes, I know about singleton classes, but they don't do what I want
> because I also want to create subclasses of these subclasses, and
> instances of these subclasses.
>
> As for why I want this, I'm trying to see whether I can figure out how
> to implement a decent prototype based class system in Ruby.  A friend
> says that you can't.  I thought that a clean way to do it would be to
> create an anonymous class, and create an object Prototype of that  
> class.
> I would make sure that Prototype's new method would create a new class
> which is a subclass of Prototype's, and an object of that class  
> with the
> prototype being the object that new was called on.  And Prototype  
> would
> have a def method which would define new methods in the class of the
> object that def was called on.
>
> And yes, I know I could do this by dynamically creating normal classes
> with calls to eval.  But I'd prefer to avoid going there.
>
> Thanks,
> Ben
> -- 
> Posted via http://www.ruby-forum.com/.
>

http://codeforpeople.com/lib/ruby/prototype/prototype-2.0.0/README

Cheers-
Ezra Zygmuntowicz
Founder & Ruby Hacker
ezra@engineyard.com
EngineYard.com