What are common mistakes when implementing the Observer pattern?

What are common mistakes when implementing the Observer pattern?

Some common mistakes include not properly managing subscriptions, failing to notify observers, and creating tight coupling.

Can you explain how to manage subscriptions effectively?

To manage subscriptions effectively, ensure you have methods to add, remove, and notify observers without causing memory leaks.

What happens if observers are not notified?

If observers are not notified, they won't receive updates, leading to stale data and potentially incorrect application behavior.

Are there any performance issues with the Observer pattern?

Yes, if there are too many observers or frequent updates, it can lead to performance bottlenecks.