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I've studied and implemented design patterns for a few years now, and I'm wondering. What are some of the newer design patterns (since the GOF)? Also, what should one, similar to myself, study [in the way of software design] next?
Note: I've been using TDD, and UML for some time now. I'm curious about the newer paradigm shifts, and or newer design patterns.
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Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchangeable.
The strategy pattern is useful for situations where it is necessary to dynamically swap the algorithms used in an application. The strategy pattern is intended to provide a means to define a family of algorithms, encapsulate each one as an object, and make them interchangeable.
Strategy design pattern is one of the behavioral design pattern. Strategy pattern is used when we have multiple algorithm for a specific task and client decides the actual implementation to be used at runtime.
There is roughly an infinite number of design patterns. Design patterns are just that: a recurrence of tricks programmers use to get things done. The most useful thing about the GoF patterns is how famous they are. In that, they have become a language -- exactly what the GoF hoped to achieve.
Many other patterns you'll find on the web and in literature are "just" useful tricks, not so much a language you can use when you speak to fellow programmers. That said, there is a number of patterns that arose in the past ten years or so, particularly in the realm of web development. See the patterns listed in Martin Fowler's patterns book.
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I'm surprised that no one has mentioned Martin Fowler's book Patterns of Enterprise Application Architecture. This is an outstanding book with dozens of patterns, many of which are used in modern ORM design (repository, active record), along with a number of UI layer patterns. Highly recommended.
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