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They reflect untold redesign and recoding as developers have struggled for greater reuse and flexibility in their software. Design patterns capture solutions that have developed and evolved overtime and they are not the designs people tend to generate initially.

This website is about design patterns that describes simple and elegant solutions to specific problems in object-oriented software design. What is required is a principled means of extracting, documenting, conveying, applying, and preserving this design experience without undue time and effort.

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It is easy to take a pattern implemented in Java and convert it to C++. The basic structure stays the same only the details change. Part of the appeal of design patterns is that they can be used uniformly over many different languages and syntaxes. The site explores the capabilities and pitfalls of object-oriented programming and describes several software design patterns. The authors Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides are often referred to as the GoF, or Gang of Four.

Design Patterns are a software engineering concept describing recurring solutions to common problems in software design.