Copyright by Kent Beck

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Chapter 30. Design Patterns

One of the primary insights of patterns is that although it may seem as though we solve completely different problems all the time, most of the problems we solve are generated by the tools we use, not by the external problem at hand.[1] Because of this, we can expect to find (and actually do find) common problems with common solutions even in the midst of an incredible diversity of external problem solving contexts.

Applying objects to organizing computation is one of the best examples of common internally generated subproblems being solved in common, predictable ways. The enormous success of design patterns is a testimonial to the commonality seen by object programmers.[2] The success of the book Design Patterns, however, ...

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