I've written quite a bit on this subject so instead of repeating myself,
here are a few links...

http://www.sapphiresteel.com/Ruby-The-Smalltalk-Way
http://www.sapphiresteel.com/Ruby-The-Smalltalk-Way-1
http://www.sapphiresteel.com/Ruby-The-Smalltalk-Way-2-A
http://www.sapphiresteel.com/Ruby-Th...ay-3-The-World

best wishes
Huw Collingbourne

SapphireSteel Software
Ruby and Rails In Visual Studio
http://www.sapphiresteel.com
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