How can I combine different design patterns in software development?

How can I combine different design patterns in software development?

Combining design patterns can enhance your software architecture. What specific patterns are you considering?

I'm thinking about using the Singleton and Factory patterns together.

That's a great combination! The Singleton can ensure a single instance of a class, while the Factory can create that instance. How do you plan to implement it?

I want to use the Factory to create instances of a class that should only have one instance.

You can achieve this by having the Factory method check if the instance already exists. If it does, return that instance; otherwise, create a new one.