What is the Observer Pattern in software design?

What is the Observer Pattern in software design?

The Observer Pattern is a behavioral design pattern that defines a one-to-many dependency between objects. When one object changes state, all its dependents are notified and updated automatically.

Can you give me an example of where this pattern is used?

Sure! A common example is in event handling systems, like in GUI applications where multiple components need to respond to user actions.

What are the benefits of using the Observer Pattern?

The benefits include loose coupling between the subject and observers, easier maintenance, and the ability to add new observers without modifying the subject.

Are there any drawbacks to using this pattern?

Yes, potential drawbacks include memory leaks if observers are not properly removed and the complexity of managing multiple observers.