What is the difference between the decorator pattern and the strategy pattern?

What is the difference between the decorator pattern and the strategy pattern?

The decorator pattern allows behavior to be added to individual objects dynamically, while the strategy pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable.

Can you give me an example of each pattern?

Sure! For the decorator pattern, think of a coffee shop where you can add milk or sugar to your coffee. Each addition is a decorator. For the strategy pattern, consider a navigation app that can use different routes (like fastest, scenic, or shortest) based on user preference.

When should I use one over the other?

Use the decorator pattern when you want to add responsibilities to objects dynamically. Use the strategy pattern when you need to switch between different algorithms or behaviors.

Are there any drawbacks to using these patterns?

Yes, the decorator pattern can lead to a complex structure of decorators, making it hard to understand. The strategy pattern can lead to a proliferation of strategy classes, which can be cumbersome to manage.