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From: Al Christians <achrist@easystreet.com>
Subject: Re: Difference between Ada and Small talk - Object Oriented
Date: 1997/10/30
Message-ID: <3458C41A.3981@easystreet.com>#1/1
X-Deja-AN: 286859488
References: <34592A6B.665@ednet.co.uk>
Organization: Trillium Resources Corporation
Reply-To: achrist@easystreet.com
Newsgroups: comp.lang.ada
Date: 1997-10-30T00:00:00+00:00
List-Id: <comp.lang.ada>


David Brown wrote:
> Can any one help me, I have to write an essay on the differences between
> Ada and Smalltalk focusing on there object oriented features.

Main difference is when the error messages come out.  ST gives the "Does
Not Understand" message at run time when the program sends a message
that is not defined for the class of the receiving object.  Ada bends
every effort to make sure you figure this all out before it happens. 
The similar error in Ada won't and can't compile, so you have to fix it
sooner.  Smalltalk programmers say that this doesn't happen very much
and it's no big deal.  Ada programmers like to not worry that it might
happen.  

If you can understand and explain all the implications of that one
difference, you've probably got a good paper.  

Al