From: ara.t.howard@...
Date: 2006-12-07T02:00:03+09:00
Subject: Re: Calling super in overwritten methods

On Wed, 6 Dec 2006, Joerg Diekmann wrote:

> Hi - not sure if this is possible - but it feels like it could be with
> some serious ruby-fu.
>
> I have the following:
>
> class A
>  def method1
>    method2
>  end
>
>  def method2
>    return 100
>  end
> end
>
> class B < A
>  def method1
>    super
>  end
>
>  def method2
>    return 200
>  end
> end
>
>
> This is what happens:
>
> b.method1 # 200
>
> But, what I want is:
>
> b.method1 # 100
>
>
> Is this possible at all?

     harp:~ > cat a.rb
     class A
       CLASS = self
       def method1 *a, &b
         CLASS.instance_method(:method2).bind(self).call *a, &b
       end
       def method2
         return 100
       end
     end

     class B < A
       CLASS = self
       def method1
         super
       end
       def method2
         return 200
       end
     end

     p A.new.method1
     p B.new.method1


     harp:~ > ruby a.rb
     100
     100


just because you can, however, doesn't mean you should.  why do you want to do this?

-a
-- 
if you want others to be happy, practice compassion.
if you want to be happy, practice compassion.  -- the dalai lama