Design patterns provide a standard terminology and are specific to particular scenario . For example, a singleton design pattern signifies use of single object so all developers familiar with single design pattern will make use of single object and they can tell each other that program is following a singleton pattern.
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– Design patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system . Design Patterns establishes solutions to common problems which helps to keep code maintainable, extensible and loosely coupled.
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