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From: Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de>
Newsgroups: comp.lang.ada
Subject: Re: MI ammunition : linked lists
Date: Tue, 11 Nov 2003 18:38:45 +0000 (UTC)
Organization: GMUGHDU
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amado.alves <amado.alves@netcabo.pt> wrote:
: <<Inheritance should reflect an "is a" relationship. Do you fill comfortable stating that a middle node is a first node and a last
: node at the same time?...>>
: 
: I do saying a Node_Pointing_Both_Ways is a Node_Pointing_Forward and a Node_Pointing_Backward.
: 
: But I agree with the general advice. Thanks.

Maybe there is another clear picture, if you think of slightly
more complex structure than a list. You can "ask" a node, "do
you have a predecessor/successor?", but what question are you
going to ask a graph node?
For example, if a star is a node with indegree >= 5, does it
make sense to employ any kind of ihneritance to reflect an
indegree of 5?


Georg