Design patterns

In software engineering, a software design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. It is not a finished design that can be transformed directly into source or machine code. It is a description or template used to know how to solve a problem that can be used in many different situations. Design patterns are formalized best practices that a programmer can use to solve common problems while designing an application or system. Design patterns may be viewed as a structured approach to computer programming intermediate between the levels of a programming paradigm and a concrete algorithm.

List of implementations

• Behavioral
  • Callback
  • Chain Of Responsibility
  • Command
  • Delegation
  • Iterator
  • Null Object
  • Observer
  • State
  • Strategy
  • Template Method
  • Visitor
  • Interpreter
  • Mediator
• Concurrency
  • Active Object
  • Balking Pattern
  • Concurrent Server
  • Fan Out
  • Guarded Suspension
  • Mutext
  • Semaphores
  • Observer
  • Thread Pool
• Creational
  • Abstract Factory
  • Builder
  • Dependency Injection
  • Factory
  • Lazy Initialization
  • Method Chaining
  • Prototype
  • Singleton
  • Value Object
• Structural
  • Adapter
  • Bridge
  • Builder
  • Composite
  • Decorator
  • Filter
  • Flyweight
  • Facade
  • Repository
  • PrivateClass
  • Proxy
  • TransactionalStack

Contribution

• Contributions are always welcome. Language doesn't matter. Just make sure you're implementing design pattern.

• PRs are welcome. To begin developing, follow the structure:

  category/design pattern name/language-name/file_name.extension

  e.g

  Creational/Abstract factory/python/abstract_factory.py

• Don't forget to add README with explanation how pattern works, when to use and common usage of the pattern.

• Adding image with UML diagram for design pattern would be very helpful.

Resources

Curated list of resources dealing with design patterns.

• Books
  • Head First Design Patterns 2nd Edition [Python] [Java]
  • Elements of Reusable Object-Oriented Software
  • Design Patterns Explained: A New Perspective on Object Oriented Design
  • Patterns of Enterprise Application Architecture
• Free e-books
  • Design Pattern in C++
  • Design Pattern in Javascript
• Sites
  • Design patterns
  • Geeks for geeks design patterns
  • Source making Design patterns
  • Java Desgin Pattens Example tutorial
  • Learn about Design Patterns
  • Design Patterns - refactoring.guru
• Online classes (Free)
  • Design Patterns - Coursera
  • Hackr.io list

License

To the extent possible under law, Zoran Pandovski has waived all copyright and related or neighboring rights to this work.