What are some best practices for using type classes in Haskell?

What are some best practices for using type classes in Haskell?

When using type classes in Haskell, it's important to keep your interfaces small and focused. This helps maintain clarity and reduces complexity.

Can you give an example of a small type class?

Sure! A simple example is the Eq type class, which defines equality. It has a single method, ==, making it easy to implement.

How do I implement a custom type class?

To implement a custom type class, define the class with its methods, then create instances for your types. For example, class MyClass a where myMethod :: a -> String.

What should I avoid when designing type classes?

Avoid creating large type classes with many methods, as this can lead to confusion. Also, be cautious with overlapping instances.