From: Peter Hickman <peterhickman386@...>
Date: 2012-05-01T17:51:41+09:00
Subject: Re: I need some advice for a project I am working on

Patterns come with experience. It's one of those things that some
academic noticed that developers were doing and related it to
Christopher Alexanders work in architecture. As you become experienced
you will naturally use and be able to identity those patterns, there
also exist 'anti-patterns' - patterns created by persistent bad habit
and uncritical use of "industry standards" which are arguably more
important to identify. But whatever.

However an important point is that the original gang of four patterns
do not apply to all languages (they were identified in the C/C++/Java
style of languages and are partially a consequence of the language
design) because some languages implement the patterns at a language
level. Some patterns are easier in one language than another or at
least may be more efficiently in one than another. For example not all
languages are OO. Heresy I know :)

Back to your project. Build up the use cases for your application.
Then see what concrete classes are needed and then see what you can
abstract (don't force yourself, there may be little abstraction to be
had) then model how they interact.

Write code and then identify the patterns that you have used.