The Design Patterns

• 23 Patterns commonly seen in Object Oriented Programming Contexts
• These patterns provide a few benefits.
  • They give ready made abstractions.
  • They reduce errors by institutionalizing details of common solutions They are standardized approaches for solving common problems.
  • They suggest design alternatives. They are heuristics.
  • They streamline communication. Rumpelstiltskin principle applies as well. Giving words to these patterns allows us to talk about them better.
  • They manage complexity

Topics §

Creational Patterns §

• Abstract Factory
• Builder
• Factory Method
• Object Pool
• Prototype
• Singleton

Structural Patterns §

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

Behavioral Patterns §

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

Other §

• Dependency Injection
• Inversion of Control - custom written portions of the code receive control flow from a generic framework. Control is inverted as it is the framework that is in control rather than the callee.

Links §

• Design Patterns Elements of Reusable Object-Oriented Software by Gamma, Helm, Johnson, and Vissides
• The Timeless Way of Building - introduced the concept of design patterns but for architecture.