What is design pattern?
By bluestorm
@bluestorm (59)
August 23, 2007 12:29am CST
Design patterns are descriptions of communicating objects and classes that are customized to solve a general design problem in a particular context.
A design pattern has four essential elements:
1. Pattern name.
2. Problem, which describes when to apply the pattern.
3. Solution, which describes the elements that make up the design, their relationships, responsibilities, and collaborations.
4. Consequences, which are the results and trade-offs of applying the pattern.
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