What are the differences between Singleton and Factory design patterns?

What are the differences between Singleton and Factory design patterns?

The Singleton pattern ensures a class has only one instance and provides a global point of access to it. In contrast, the Factory pattern is used to create objects without specifying the exact class of object that will be created.

Can you give me an example of when to use each pattern?

Sure! Use Singleton when you need a single instance, like a configuration manager. Use Factory when you want to create objects that share a common interface but may have different implementations, like different types of shapes.

What are the advantages of using the Singleton pattern?

The advantages include controlled access to the single instance, reduced memory footprint, and easier debugging since there's only one instance to track.

Are there any downsides to using the Factory pattern?

Yes, it can introduce complexity and may lead to a more extensive codebase since you have to create multiple classes for different products.