From: dblack@...
Date: 2003-08-10T20:40:43+09:00
Subject: Re: Ruby and OOP-design (question of an old "procedural person" ;)

Hi --

On Sun, 10 Aug 2003, Dan Doel wrote:

> But why should ? methods be required to return solely true or false?
> Isn't it enought to require that they
> return objects that evaluate to true or false appropriately?

Jumping in with semi-devil's-advocate point:

One situation I can think of in which it would be handy to rely on this
would be:

  if a.nil? == b.nil?

which of course could also be written:

  if (a.nil? && b.nil?) ||! (a.nil? || b.nil?)

or something, but obviously version 1 is nice and concise.  Then again,
it's a pretty marginal case, I guess.


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav