From: Jim Freeze <jim@...>
Date: 2003-05-09T23:28:38+09:00
Subject: Re: Can a global be a constant?

On Friday,  9 May 2003 at 21:33:17 +0900, ts wrote:
> >>>>> "J" == Jim Freeze <jim@freeze.org> writes:
> 
>  What do you do when someone write ?
> 
>    module A
>       def a
>          puts "a"
>       end
>    end
> 
>    a = []
>    a.extend A
>    a.a
> 
>  a singleton class is an easy way to solve these problems, because when you
>  write 'a.extend(A)' ruby has made the include in the singleton class
>  associated with 'a' and you have something which is usefull, simple and
>  coherent (another argument against the multi-dispatch :-))))
> 

There you go twisting things up again. :)
The pickaxe book doesn't provide figures for this behavior, but 
I assume that the a.extend creates a singleton class behind
the scenes and points klass to the new singleton class.
Then, the methods of A are not added to the singleton class, but
a Proxy is created and the singletons super points to the proxy.
The Proxy class then handles the method calls.
Of course, all this is just a guess, since I have not seen
it documented anywhere.

Am I far off?


-- 
Jim Freeze
----------
"What is wanted is not the will to believe, but the will to find out,
which is the exact opposite."
		-- Bertrand Russell, "Skeptical_Essays", 1928