Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!decwrl!argosy!kentb
From: kentb@argosy.UUCP (Kent Beck)
Newsgroups: comp.lang.smalltalk
Subject: Re: Access methods - New feature ?
Message-ID: <1259@argosy.UUCP>
Date: 25 Apr 91 17:34:22 GMT
References: <VOSS.91Apr23194435@laslo.cs.uiuc.edu> <1991Apr24.153744.24049@ccs.carleton.ca> <VOSS.91Apr24215444@jerry.cs.uiuc.edu> <1991Apr25.141642.4560@ccs.carleton.ca>
Sender: news@argosy.UUCP
Reply-To: kentb@shark.UUCP (Kent Beck)
Organization: MasPar Computer Corp, Sunnyvale CA
Lines: 11

Alan Knight makes a good point about operations becoming "heavier" than
data.  The image has a good example of this in BitBlt. 

If the "function" becomes so important or hairy that it doesn't seem to
fit in any existing class, make it an object.  Then all the benefits of 
objects accrue.  If you thought that graphics operations should be in 
Form (probably as primitives) you would have locked out all the neat, 
nasty efficiency hacks that having BitBlt be its own object enable, 
like scrolling Strings in a terminal emulator.

Kent