Re: Clean Object Class Design -- Circle/Ellipse

From: Bob Badour <bbadour_at_golden.net>
Date: Sun, 19 Aug 2001 00:03:09 -0400
Message-ID: <T%Gf7.80$oL7.21026935@radon.golden.net>

>> >What does one gain by deriving Integer from Rational?
>>
>> What does one gain by not deriving integer from Rational? What does one
>> lose? How does one's decision affect integer values in the least --
>> including their subtype/supertype relationships with other numeric types?
>>
>This one is easy. Take a look at the Smalltalk Number classes. Integer
>and Real inherit from Number. Try inheriting Integer from Real and see
>what a mess you've made.

I have no doubt that Smalltalk makes a mess of it.

>A few decades of experience have given us the answer. Back to you guys
>to figure out the correct theory :-)

Date already did. Hadn't you noticed? Received on Sat Aug 18 2001 - 23:03:09 CDT