What classifications of design patterns do you know?

There are several classifications of design patterns:

• By purpose:

  • Creational: Manage the process of object creation. Examples: Factory Method, Abstract Factory, Singleton, Prototype, Builder.
  • Structural: Define ways to build class and object structures. Examples: Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy.
  • Behavioral: Describe interactions between classes and objects. Examples: Chain of Responsibility, Command, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor.

• By level of abstraction (GoF - "Gang of Four"): This classification, proposed in the book "Design Patterns: Elements of Reusable Object-Oriented Software," is the most common and includes the above categories (creational, structural, behavioral).

• By application:

  • Class design patterns: Describe relationships between classes at compile time.
  • Object design patterns: Describe relationships between objects at runtime.

• By domain specificity:

  • User interface patterns: Define ways to interact with the user (e.g., Model-View-Controller, Model-View-ViewModel).
  • Interaction patterns: Describe ways components of the system communicate.
  • Other domain-specific patterns.