From: "Matthew, Graeme" <Graeme.Matthew@...>
Date: 2002-09-19T15:35:36+09:00
Subject: Business Objects

I have been searching the www for some examples on how programmers have
implemented OO models 
in a real business environment. Does anyone know of any examples around eg
Orders , inventory.
I am planning a "software development project management system" that I will
be writing in Ruby /Apache / Mysql. I have decided to move away from Perl as
its difficult to refactor my code even after 6 months let alone someone
else's.

I am trying to find out the best way to implement an OO structure, so the
question is

Do you take a class and embed all sub classes within the one definition

eg

class Project

	class ProjectData


	end


	class ProjectSearch


	end


	class ProjectScreen


	end

end class

OR

use them seperately using file locations eg

require Project/Data
require Project/Search
require Project/Screen


Any advice would be welcome, or criticism :-)
Graeme Matthew
Analyst Programmer
Mercer Investment Consulting
Level 29, 101 Collins Street, Melbourne, VIC, 3001, Australia
Tel  - 61 3 9245 5352 Fax - 61 3 9245 5330
visit http://www.merceric.com


-----Original Message-----
From: JamesBritt [mailto:james@jamesbritt.com]
Sent: Thursday, 19 September 2002 16:24
To: ruby-talk@ruby-lang.org
Subject: RE: If Statement Help


> Hi All
>
> Im currently learning ruby and its going well. I have been looking at a
> number of "guru" libraries such as DBI, CGI etc to try and learn
> by example.
> I have noticed that a number of if statements have the following
> syntax eg:
>
> if File.name?
>
> Can someone please explain the ? usage as I have searched all over the
> Pragmatic Programmer pages with no answer.

Methods that end with a question mark should return a Boolean value.  This
is a coding convention, not a parser-enforced syntax rule.


James

>
> Thanks
__


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