Design Patterns (Gang of Four: Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides)

|Behavioral|

• Strategy: https://refactoring.guru/design-patterns/strategy
• Chain of Responsibility: https://refactoring.guru/design-patterns/chain-of-responsibility
• Template Method: https://refactoring.guru/design-patterns/template-method
• State: https://refactoring.guru/design-patterns/state
• Command: https://refactoring.guru/design-patterns/command
• Observer: https://refactoring.guru/design-patterns/observer (aka "Listener")

|Structural|

• Adapter: https://refactoring.guru/design-patterns/adapter
• Decorator: https://refactoring.guru/design-patterns/decorator
• Composite: https://refactoring.guru/design-patterns/composite
• Facade: https://refactoring.guru/design-patterns/facade
• Proxy: https://refactoring.guru/design-patterns/proxy