This repository is a comprehensive collection of the 23 classic design patterns, as outlined in the seminal work "Design Patterns: Elements of Reusable Object-Oriented Software" by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides – collectively known as the Gang of Four (GoF).

1. Creational Patterns

• Singleton
• Builder
• Factory Method
• Prototype
• Abstract Factory

2. Structural Patterns

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

3. Behavioral Patterns

• Command
• Iterator
• Mediator
• Memento
• Observer
• State
• Strategy
• Template Method
• Visitor