From: Matt Mower <matt.mower@...>
Date: 2004-12-13T16:32:07+09:00
Subject: Re: Abstracts and Interfaces in Ruby?

On Mon, 13 Dec 2004 16:12:04 +0900, Nicholas Van Weerdenburg
<vanweerd@gmail.com> wrote:
> On Mon, 13 Dec 2004 15:20:26 +0900, Miles Keaton <mileskeaton@gmail.com > wrote:
> 
> For example, you can extend the Enumerable modules, and your changes
> apply to all objects in the system that use Enumerable:
> 
> module Enumerable
>  def each
>      raise "you must implement each"
>  end
> end
> 

Would this not introduce a breakage?  IIRC the search order for
methods is object->modules->baseclass->baseclass modules.

Hence if you mixed Enumerable into an object whose base class
imlemented #each you would *hide* the base-class implementation.

Or have I got it wrong?  (I'm still a learner).

Regards,

Matt

-- 
Matt Mower :: http://matt.blogs.it/