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Title: Helpful for learning
Review: If you are a hands on Java programmer and want the design patterns explained as you can understand them in code, this book is worth it. I notice other reviewers slate this book, picking up on what they consider to be "errors". Well, ultimately GOF4 is always going to be the authority on patterns but GOF4 is very dry - this book gives a practical java code explanation of the patterns. I often browse through it looking for ideas.
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