What are some common errors in the observer pattern?

What are some common errors in the observer pattern?

Some common errors include not properly managing subscriptions, memory leaks, and failing to notify observers.

Can you explain how to avoid memory leaks in the observer pattern?

To avoid memory leaks, ensure that observers are unsubscribed when they are no longer needed, especially in languages with manual memory management.

What happens if an observer is not notified?

If an observer is not notified, it may lead to outdated or incorrect information being displayed, causing inconsistencies in the application.

Are there any best practices for implementing the observer pattern?

Yes, best practices include using weak references for observers, ensuring thread safety, and providing clear documentation for the pattern's usage.