What is a design pattern?

A design pattern is something describes a simple and elegant solutions to a specific problem in object-oriented software design.

They capture solutions that have developed and evolved over time. Therefore, they are not the design people tend to generate initially.

Types of Patterns

Creational Patterns

• Abstract Factory
• Builder
• Factory Method
• Prototype
• Singleton

Structural Patterns

• Adapter
• Bridge
• Composite
• Decorator
• Facade
• Flyweight
• Proxy

Behavioral Patterns

• Chain of Responsibility
• Command
• Interpreter
• Iterator
• Mediator
• Memento
• Observer
• State
• Strategy
• Strategy
• Template Method
• Visitor

The Beginning

Sources:

Design Patterns, Elements of Reusable Object-Oriented Software

By

Erich Gamma
Richard Helm
Ralph Johnson
John Vlissides

Publish 1995 by Addison-Wesley