From: Calamitas <calamitates@...>
Date: 2008-06-14T21:35:35+09:00
Subject: Re: Modules, Overloading, and some Confusion

On Sat, Jun 14, 2008 at 12:48 PM, Old Echo <kodama@bluexpanse.net> wrote:
> Hello Rubyists,
> Here's something I've been pondering lately and was hoping to get a good
> response from someone out in the community. It's about having two
> modules which both implement a method with the same name, and then
> including both modules into a class.
>
> Example:
>
> module Honda
>  def start
>    puts "Wroom"
>  end
> end
>
>
> module Ford
>  def start
>    puts "Rrrooom"
>  end
> end
>
> class Car
>  include Honda
>  include Ford
> end
>
> car = Car.new
> car.start
> => Rrrroooom
>
>
> Okay, so that's a pretty contrived example, but here's my question: how
> can I can call the start method defined in Honda rather than the start
> method defined in Ford? I feel like there's something I'm missing here,
> but I'm not sure what it is.

c = Car.new
c.start # => Rrrooom
Honda.instance_method(:start).bind(c).call # => Wroom

Or cleaner:

require 'facets'
c.as(Honda).start # => Wroom

Peter