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Design Patterns in Ruby by Russ Olsen

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Foreword

Design Patterns: Elements of Reusable Object-Oriented Software, affectionately known by many as the "Gang of Four book" (GoF) is the first reference work on the topic to be published in a mainstream book. It has sold over half a million copies since 1995 and undoubtedly influenced the thoughts and code of millions of programmers worldwide. I still vividly remember buying my first copy of the book in the late nineties. Due in part to the enthusiasm with which it was recommended to me by my peers, I treated it as part of my coming-of-age as a programmer. I tore through the book in a few days, eagerly thinking up practical applications for each pattern.

It's commonly agreed that the most useful thing about patterns is the way in which ...

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