From: Sean Middleditch <elanthis@...>
Date: 2002-03-27T02:36:20+09:00
Subject: Re: Difference between 'do' and 'begin'

On Tue, 2002-03-26 at 12:27, Dave Thomas wrote:
> Jim Freeze <jim@freeze.org> writes:

> > Ok, you have my head spinning now. How would you use this?
> 
> I'm not sure I see many practical uses, but how about
> 
>     class Fred
>       include Wombat
>     rescue NameError => e
>       puts "Sorry - you need the Wombat module to run this program"
>       exit!
>     end

Hmm, well, if you let there be initializers for instance variables in
the class definition, it could be really useful.

Also, based on your given example, you could have two classes - one a
more powerful/complex version that requires outside modules.  Then, when
you try to create a new instance of the complex one, it could give an
error and return a new instance of the weaker class.  Does Ruby CVS let
you do that now as is?

The only other use I can see is allowing it catch any exceptions thrown
by any method of the class.  I don't think that's what the construct
lets you do, tho.

> 
> Dave