What are the types/groups of design patterns?

Design patterns are proven solutions to common software design problems. They are usually divided into three main groups:

1. Creational Patterns — responsible for object creation, hiding complexity and providing flexibility:

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

2. Structural Patterns — define ways to compose classes and objects into larger structures:

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

3. Behavioral Patterns — describe interactions between objects and the distribution of responsibilities:

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

In Go, patterns are often applied considering the language's features, such as using interfaces to implement Strategy or Observer.