Design Pattern

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What is a design pattern?

In software engineering, a software design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. It is not a finished design that can be transformed directly into source or machine code. It is a description or template for how to solve a problem that can be used in many different situations. Design patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system. [Wikipedia]

The Design Patterns

Abstract Factory Pattern
Builder Pattern
Chain Of Responsibility Pattern
Composite Pattern
Decorator Pattern
Factory Pattern
Mediator Pattern
Observer Pattern
Prototype Pattern
Singleton Pattern
Strategy Pattern
Visitor Pattern