From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-10-02T21:57:33+09:00
Subject: Re: ruby-dev summary 24298-24353

On Friday 01 October 2004 01:24 pm, gabriele renzi wrote:
> trans. (T. Onoma) ha scritto:
> > In that case you might want this:
> >
> >   # functor.rb
> >
> >   class Functor
> >     def initialize(&func)
> >       @func = func
> >     end
> >     def method_missing(op, *args)
> >       @func.call(op, *args)
> >     end
> >   end
> >
> > Shhh... Don't tell anyone. It's my favorite secret weapon ;)
>
> Ok, I don't have an use for this, but, well, indeed very cool :)

Here's one related to a recent thread:

  class Object
    def supers(klass=self.class.superclass)
      raise ArgumentError if ! self.class.ancestors.include?(klass)
      Functor.new do |meth, *args|
        klass.instance_method(meth).bind(self).call(*args)
      end
    end
  end

Hmm, maybe should cache the functor for efficiency.

T.