From: ts <decoux@...>
Date: 2002-12-15T02:30:02+09:00
Subject: Re: Is it wise to extend Matrix?

>>>>> "a" == ahoward  <ahoward@fsl.noaa.gov> writes:

a> i've been out of this thread for a while, but i wanted to back up a bit and
a> ask _again_ what people find so fundementally wrong with the paradigm of
a> creating classes as in :

 Nothing wrong.

a> classes which do this are certainly better *candidates* for subclassing.  in
a> the Marix case, it may or may not be the best idea due to the associative
a> properties of some of operators but that is not the point. 

 There is where you are wrong, it exist some case where it's inappropriate
 to always make this choice.

a> interesting behaviour.  coding Matrix in this way would not of changed the way
a> it functions *and* would have allowed subclassing for the irreverant. 

 No it will just give the possibility to have strange result :-)), like

    A + Array ==> A
    Array + A ==> Array

a> can get the job at hand done quickly in the fewest lines of code;

 Yes, but nobody can predict the class of the result :-))

 There are very good reasons for the actual behavior of Array.


Guy Decoux