Design Patterns Revisited

Design Patterns are standard solutions to common design problems in object-oriented applications. They act as guidelines that can be used to solve recurring design problems in your code. If you have been in the software industry for a while, it is possible that you have already implemented some of these patterns without realizing it.

Note that design patterns are not ready-to-use code solutions. They describe or suggest how the solution should look like.

Benefits of Design Patterns

• Teach how to solve all sorts of problems using principles of Object-Oriented Design

• Adhere to SOLID principles

• Achieve highly cohesive modules with minimal coupling (Extensibility and reusability).

• Communication tools between designers and developers

Types of Design Patterns

Creational Design Patterns

• Factory/ Abstract Factory

• Builder

• Prototype

• Singleton

Structural Design Patterns

• Adapter

• Bridge

• Composite

• Decorator

• Facade

• Flyweight

• Proxy

Behavioral Design Patterns

• Chain of Responsibility

• Command

• Interpreter

• Iterator

• Mediator

• Memento

• Observer

• State

• Strategy

• Template Method

• Visitor