From: William Morgan <wmorgan-ruby-talk@...>
Date: 2005-07-08T07:10:54+09:00
Subject: Re: Inheriting Array and slice() behaviour

Excerpts from Pit Capitain's mail of  7 Jul 2005 (EDT):
> The LSP has been mentioned before in this thread. According to that
> principle, if someone creates a subclass of Array, you should be able
> to use the subclass like the original Array class. Array has a well
> defined #initialize method that can take zero arguments. So should the
> subclass, otherwise you're breaking the LSP. In other words, it's
> perfectly legal to call self.class.new in #slice. If Expression can't
> provide an #initialize method without arguments, it shouldn't be a
> subclass of Array.

So you're suggesting that #initialize be called (automatically) by
Array#slice, with no arguments? And, presumably, an ArgumentError raised
if it has required arguments?

What about #+, #reverse, #select, etc.?

-- 
William <wmorgan-ruby-talk@masanjin.net>