Delegation Pattern
The Delegation Pattern is a software design pattern where an object delegates certain responsibilities or tasks to another object, rather than implementing them itself. It promotes code reuse, separation of concerns, and flexibility by allowing objects to compose behavior dynamically. This pattern is commonly used in object-oriented programming to implement inheritance-like behavior without subclassing.
Developers should learn the Delegation Pattern when they need to avoid tight coupling, enhance modularity, or simulate multiple inheritance in languages that don't support it directly. It's particularly useful in scenarios like event handling, where an object delegates event responses to a handler, or in frameworks like iOS development with protocols and delegates. This pattern helps create more maintainable and testable code by decoupling components.