Sandi Metz. Practial Object Oriented Programming with Ruby.
amazon.com/Practical-Object-Orient...
Testing with JUnit, Frank Appel learning.oreilly.com/library/view/...
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Sandi Metz. Practial Object Oriented Programming with Ruby.
amazon.com/Practical-Object-Orient...
Testing with JUnit, Frank Appel
learning.oreilly.com/library/view/...