Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!ginosko!uunet!mcsun!sunic!bmc!sys_ms
From: Mats.Sundvall@bmc.uu.se
Newsgroups: comp.sys.mac.programmer
Subject: methods or functions in oo programming
Message-ID: <2616.252ca3bb@bmc.uu.se>
Date: 6 Oct 89 12:08:11 GMT
Organization: Biomedical Center, University of Uppsala, Sweden
Lines: 32


So, I bought TC 4.0 and jumed on the oo train. It looks really nice. The
class library is very interesting. But when trying to write some code
myself I think I kneed sopme basic advices.

I have to implement an object that does not fit in the TC class tree.
I want to implement an object tree that handles molecules like DNA, RNA
and proteins. Shall I make the object molecule a child of CObject or
make a new root?

The when I have the object DNA that I want to be able to do things with
the question is if the things I want to do shall be implemented as methods
of the object or like functions that I pass the object to.
Example: I want to be able to CUT a DNA with an enzyme. The result is
one or many objects that contain part of the sequence. How do I get the
resulting list of new DNA objects if I implement this as a method.

The other method/function I want to implement is LIGATE. I pass LIGATE
two objects of DNA and it assembles these into one object of DNA.
Should this be a method or should it be a function.

Hopefully somebody can give me a hint so I can get together some code and
ask you some more questions.

	Thanx,

-- 
		Mats Sundvall			

		Biomedical Center		+46/18174583
		University of Uppsala		Mats.Sundvall@BMC.UU.SE
		Sweden				psi%24020019700620::MATS