From: Robert Klemme <bob.news@...>
Date: 2003-08-12T20:23:31+09:00
Subject: Re: newbie mixin questions


"Michael Garriss" <mgarriss@earthlink.net> schrieb im Newsbeitrag
news:3F37F45B.8080002@earthlink.net...
> dblack@superlink.net wrote:
>
> >One other technique that might be relevant is Module#included, which
> >as I understand it is essentially a new name for append_features.  (Is
> >that accurate?)  Here's a 1.8.0 example:
> >
> >  module M
> >    def self.included(c)
> >      def c.something
> >        puts "I'm a class method!"
> >      end
> >    super
> >    end
> >
> >    def another
> >      puts "I'm an instance method!"
> >    end
> >  end
> >
> >The inclusion now operates, with fairly clear separation, on both the
> >class and the instances:
> >
> >  class A; include M; end
> >
> >  A.something
> >  A.new.another
> >
> >
> >David
> >
> >
> >
>
> That's what I needed.  Thanks!

But: you now have multiple something methods with the same definition.
That's ugly.  I'd prefer the approach to extend a class with M as shown in
the other postings:

> [matz:]
>
> class Bar
>   Bar.extend(Foo)
> end

[Gavin]:
Alternatively

  class Bar
    extend Foo
  end


Regards

    robert