From: Dave Thomas <dave@...>
Date: 2003-12-04T02:53:46+09:00
Subject: Re: mixin vs. multiple inheritence


On Dec 3, 2003, at 11:37, Robert Klemme wrote:
>> You can build as complicated a mixin graph as you can a MI graph. The
>> difference is that because mixins are modules, they don't have their
>> own state, but instead parasitically use the state of the class into
>> which they are mixed.
>
> U sure about that?
>

Yes. Doesn't your example actually illustrate the point? The module B 
uses an instance variable, but it is actually containing in the objects 
of the class that mixes in B.

Anyway, to be honest the whole conversation is somewhat moot: it isn't 
really an issue of whether one solves another's problems. Both work, 
they do similar but not identical things, and each has a set of rules 
you have to understand to use them.


Cheers

Dave