What are the best practices for using interfaces in Go?

What are the best practices for using interfaces in Go?

Some best practices include defining interfaces that are small and focused, using them to abstract behavior, and avoiding unnecessary dependencies.

Can you give an example of a small interface?

Sure! An example of a small interface is the Reader interface in Go, which has a single method: Read(p []byte) (n int, err error).

How do I implement an interface in my struct?

To implement an interface, simply define the methods of the interface in your struct. Go automatically recognizes the implementation.

What should I avoid when designing interfaces?

Avoid making interfaces too large or including methods that are not relevant to the interface's purpose. This can lead to confusion and misuse.