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DZone continues its Refcardz series with a new, free PDF cheatsheet on Design Patterns. Written by Patterns expert, Jason McDonald, this Refcard provides a quick reference to the original 23 Gang of Four design patterns, as listed in the book Design Patterns: Elements of Reusable Object-Oriented Software. Each pattern includes class diagrams, explanation, usage information, and a real world example. Features include Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Observer, Template Method and more...
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