Practical Object-Oriented Design, An Agile Primer Using Ruby (POODR) is a programmers tale about how to write object-oriented code. Written by Sandi Metz, it explains object-oriented design (OOD) using realistic, understandable examples.  POODR* is a practical, readable introduction to how OOD can lower your costs and improve your applications. POODR will help you: Decide what belongs in a single
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