Design Patterns

Design patterns in programming are reusable solutions to common software design problems.

Classification

Codes

Collections of python code for different design pattern implementation

1. Singleton Pattern
2. Factory Pattern
3. Abstract Factory Pattern
4. Builder Pattern
5. Prototype Pattern
6. Adapter Pattern
7. Decorator Pattern
8. Facade Pattern
9. Composite Pattern
10. Proxy Pattern
11. Observer Pattern
12. Strategy Pattern
13. Command Pattern
14. Mediator Pattern
15. Chain of Responsibility Pattern
16. State Pattern
17. Template Pattern
18. Null Object Pattern
19. Bridge Pattern
20. Flyweight Pattern
21. Iterator Pattern
22. Visitor Pattern
23. Memento Pattern

Practical Implementations

Collections of python code for different design pattern implementation on real life objects

1. Tic-Tac-Toe (uml)
2. Elevator System (uml)
3. Hash Map Data Structure
4. Vending Machine (uml)
5. BookMyShow (Ticket Booking Service) (uml)
6. ATM Machine (uml)
7. File System
8. Calculator
9. Splitwise (uml)
10. Cricbuzz
11. Inventory Management

Credits

All credits to Shreyansh Jain for his amazing LLD playlist

Further Resources

1. How To Remember Design Patterns
2. Design Patterns Interview Questions

Author

Prateek Gupta