From: kasal@... (Stepan Kasal)
Date: 2002-06-03T22:38:04+09:00
Subject: Re: dynamic attr_accessor??

Hallo,

On Mon, 03 Jun 2002 14:26:54 +0200, Markus Jais <mjais@web.de> wrote:
> nobu.nokada@softhome.net wrote:
> > At Mon, 3 Jun 2002 20:31:22 +0900, Markus Jais wrote:
> >> I like to create methods for my class dynamically based on
> >> strings I pass to initialize
> > 
> > class Cl
> >   def initialize(name)
> >     class << self;self;end.class_eval {attr_accessor name}
> >   end
> > end
> 
> what is the "self" between "class << self;" and "end.clas_eval..."
> good for???

just a wild guess by a newbie:

"class<<self; def ...; end" would perform the method def of the
class of the object in question (and it would add a method to it).
(This is probably not exactly true, since "def" probably isn't real
method, but it wouldn't matter at the moment.)

So between "class<<self" and "end" you speak to the sigleton class of
the object (and perhaps you create it if it doesn't exist yet).

Thus "class<<self;self;end" tells the singleton class to return itself.

HTH,
	Stepan