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Elevate your software design skills with practical examples and insightful discussions. This workspace has been generated by Nx, Smart Monorepos · Fast CI. For each design pattern, there is folder based on TypeScript. If you are comming from another programming language world, don't worry. They are not complicated. Also, tests are included for each pattern. Also you can see bad practices to understand use cases.

How to Learn? 📖

Prerequisites

First, go over the prerequisites of design patterns—after that, it'll be much easier to move forward.

Patterns

You can open each directory, for instance:

$ cd app/strategy-pattern

There is a README file that you can review first.

Structure of Readme

Here is some steps in each README file:

• 💡 Use Case: a short description about the specific problem that we want to solve.
• ❌ Bad Practice: a typical solution that works but not in a proper way.
• ✅ Good Practice: implementing the specified design pattern to solve the problem in a proper way.

Diagram: There is also a diagram to represent the oveview of the design pattern to understand better. These are some examples:

Observer Pattern

Decorator Pattern

Chain of Responsibility Pattern

Strategy Pattern

Open /app folder to see all design patterns. ✅

How to Run

In the root directory, run:

$ npm install

To run the design pattern:

$ npm run -w PATTERN_NAME start

For instance PATTERN_NAME can be strategy-pattern

To run the bad practice:

$ npm run -w PATTERN_NAME start:bad

Run Tests

In order to run tests, run the following command. (add :watch to run it in watch mode):

$ npm run test
$ npm run test:cov # test coverage
$ npm run test:cov:open # open test coverage reports

Contributing

Contributing to a community project is always welcome. List of contributors:

Vahid Najafi	Elshad Humbatli	Sabeer Waqas

Checklist

• Prerequisites
  • 4 Pillars of OOP
  • SOLID Principles
  • KISS
  • DRY
  • YAGNI
  • Cross-Cutting-Concerns
• Strategy Pattern
• Dependency Injection Pattern
• Chain of Responsibility Pattern
• Builder Pattern
• Decorator Pattern
• Template Method Pattern
• Observer Pattern
• Command Pattern
• Composite Pattern
• Adapter Pattern
• Simple Factory Method
• Factory Method Pattern
• Abstract Factory Pattern
• Proxy Pattern
• Bridge Pattern
• Prototype Pattern
• Memento Pattern
• Facade Pattern
• Singleton Pattern
• State Pattern
• Mediator Pattern
• Iterator Pattern
• Flyweight Pattern
• Visitor Pattern

Support

Any support is welcome. You can give the project a star, if you liked it ⭐

Related Projects

• Real World Scalable Architecture

License

MIT