What is the observer pattern in programming?

What is the observer pattern in programming?

The observer pattern is a design pattern where an object, called the subject, maintains a list of dependents, called observers, and notifies them of state changes.

Can you give me a real-world example of the observer pattern?

Sure! A common example is a weather station (subject) that updates multiple display boards (observers) whenever the weather changes.

How is it implemented in code?

In code, you typically have a Subject class that manages observers and notifies them, and Observer classes that implement an update method.

What are the benefits of using the observer pattern?

The observer pattern promotes loose coupling, making it easier to add or remove observers without affecting the subject.