What design pattern classifications are you familiar with?

Design patterns are classified by two main features: purpose and application area.

By purpose:

• Creational patterns: Describe ways to create objects, hiding the creation logic and optimizing this process.
• Structural patterns: Describe ways to combine classes and objects into larger structures, simplifying the design of complex systems.
• Behavioral patterns: Describe ways objects interact and distribute responsibilities, improving system flexibility and extendability.

By application area:

• Class patterns: Related to relationships between classes, determined at compile time, and use inheritance.
• Object patterns: Related to relationships between objects, determined at runtime, and use composition and delegation.

Examples of patterns from the "Gang of Four" (GoF) categories:

Purpose	Patterns
Creational	Abstract Factory, Builder, Factory Method, Prototype, Singleton
Structural	Adapter (objects), Bridge, Composite, Decorator, Facade, Flyweight, Proxy
Behavioral	Chain of Responsibility, Command, Iterator, Mediator, Memento, Observer, Strategy, Template Method, Visitor