![]() This is why design patterns are useful as an abstraction over the implementation and a help at design stage. Patterns can emerge on their own or by design. A pattern is a way to describe and address by name a repeatable solution or approach to a common design problem, that is, a common way to solve a generic problem (how generic or specific the pattern is depends on how restricted the target goal is). While not new, since the concept was already described by Christopher Alexander in its architectural theories, it only gathered some traction in programming due to the publication of Design Patterns: Elements of Reusable Object-Oriented Software book in October 1994 by Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides, known as the Gang of Four (GoF), that identifies and describes 23 classic software design patterns.Ī design pattern is neither a static solution, nor is it an algorithm. Software design patterns are abstractions that help structure system designs. ![]()
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