This book aims to immerse you in an OO mindset and to teach you real-world, object-oriented design techniques with simple and practical examples. Author Sandi Metz demonstrates how to build new applications that can “survive success” and repair existing applications that have become impossible to change. Each technique is illustrated with extended examples in Ruby, and this second edition of the book has been fully updated for Ruby 2.5.

Author: Sandi Metz
Publisher: Addison-Wesley
Date: July 2018
Pages: 288
ISBN: 978-0134456478
Print: 0134456475
Kindle: B07F88LY9M
Audience: Ruby programmers interested in object-oriented design
Level: Intermediate
Category: Ruby and Theory & Techniques 

• Decide what belongs in a single class
• Avoid entangling objects that should be kept separate
• Define flexible interfaces among objects
• Reduce programming overhead costs with duck typing
• Successfully apply inheritance
• Build objects via composition

For recommendations of Ruby books see Gems Among Ruby Books in our Programmer's Bookshelf section.

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