From: gwtmp01@...
Date: 2007-01-29T10:34:16+09:00
Subject: Re: instance variables available in derived clases


On Jan 27, 2007, at 7:10 PM, Richard Roberts wrote:
> Anyway, looks like it's just the way it is in ruby, and I'm going to
> have to be careful when I inherit.

Bertrand Meyer in Object Oriented Software Engineering talks a lot
about the differences between the client and subclass relationships.
If I recall, he argues that a choice to subclass is in effect a choice
to reuse implementation.

Delegation is another way to reuse a class without gaining access to
private information.

Gary Wright