What are some real-world examples of the observer pattern?

What are some real-world examples of the observer pattern?

The observer pattern is commonly used in event handling systems. For example, in a weather application, the weather data can be the subject, and various display elements like temperature, humidity, and pressure can be observers that update when the weather data changes.

Can you give me another example?

Sure! In a stock market application, the stock prices can be the subject, and different investors or trading platforms can be observers that get notified when there are changes in stock prices.

How does this pattern help in software design?

The observer pattern promotes loose coupling between components. It allows subjects to notify observers without needing to know their details, making the system more modular and easier to maintain.

Are there any drawbacks to using the observer pattern?

Yes, one drawback is that if there are too many observers, it can lead to performance issues. Additionally, managing the lifecycle of observers can become complex.