Design Patterns in Ruby
(from Russ Olsen's book)

Chapter 3:  Template Method pattern
Chapter 4:  Strategy pattern
Chapter 5:  Observer pattern
Chapter 6:  Composite pattern
Chapter 7:  Iterator pattern
Chapter 8:  Command pattern
Chapter 9:  Adapter pattern
Chapter 10: Proxy pattern
Chapter 11: Decorator pattern
Chapter 12: Singleton pattern
Chapter 13: Factory and Abstract factory pattern
Chapter 14: Builder pattern
Chapter 15: Interpreter pattern
Chapter 16: Domain-Specific Languages
Chapter 17: Meta-programming
Chapter 18: Convention over configuration


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