Design Pattern for Dummies

Topics covered (with short explanation and code examples)

• Why Design Patterns?
• SOLID principle
• The 23 "Gang of Four" Design Patterns

Why Design Patterns?

• For developing highly cohesive code modules with minimal coupling
• To adhere to 'DRY' principle (Don't Repeat Yourself) while writing softwares
• For writing highly scalable software that's easy to extend and maintain
• Common language for communicating technically complex stuff

List of the Original 23 Patterns:

• Behavioral
  • Memento
  • State
  • Iterator
  • Strategy
  • Template Method
  • Command
  • Observer
  • Mediator
  • Chain of Responsibility
  • Visitor
  • Interpreter
• Structural
  • Adapter
  • Bridge
  • Composite
  • Decorator
  • Facade
  • Flyweight
  • Proxy
• Creational
  • Abstract Factory
  • Builder
  • Factory Method
  • Prototype
  • Singleton