From: Mark Volkmann <r.mark.volkmann@...>
Date: 2006-02-22T00:51:16+09:00
Subject: Re: "exporting" module methods

On 2/21/06, dblack@wobblini.net <dblack@wobblini.net> wrote:
> Hi --
>
> On Wed, 22 Feb 2006, Mark Volkmann wrote:
>
> > On 2/21/06, dblack@wobblini.net <dblack@wobblini.net> wrote:
> >
> >> I don't think that's what Xavier wanted; I think he wanted C to be
> >> able to call M.croak.  (Also, in your example, c doesn't respond to
> >> croak.)
> >
> > Wow!  I have a fundamental misunderstanding of mixins apparently. I
> > see that you are correct. c doesn't respond to croak in the following
> > code. However, I don't understand why. Doesn't the include add
> > instance methods from the module M to the class C?
> >
> > module M
> >  def self.croak
> >    puts 'croak'
> >  end
> > end
> >
> > class C
> >  include M
> > end
> >
> > c = C.new
> > c.croak
>
> Yes, but croak isn't an instance method :-)  (Note the "self." part.)

Silly me!  I briefly crossed things in my mind and thought that
including "self." made it an instance method ... and I thought I got
enough sleep last night. ;-)

--
R. Mark Volkmann
Partner, Object Computing, Inc.