The Observer design pattern defines a one-to-many relationship between objects, allowing one object to notify multiple dependent objects of any state changes. This pattern is commonly used in event-driven systems to ensure that all interested parties are updated when an event occurs.
How does the Observer pattern work?
The Observer pattern works by having a subject maintain a list of observers that are notified of any changes to the subject's state. This ensures all observers are updated with the latest information.
What are common use cases for the Observer pattern?
Common use cases for the Observer pattern include event handling systems, user interface updates, and implementing distributed event-driven architectures.
What are the advantages of using the Observer pattern?
The advantages of using the Observer pattern include decoupling the subject from its observers, promoting a modular and scalable system design, and ensuring that changes are propagated to all interested parties efficiently.