What are some exercises to practice Haskell monads?

What are some exercises to practice Haskell monads?

Here are a few exercises to help you practice Haskell monads:

1. Implement the Maybe monad and create functions that use it.
2. Write a function that uses the List monad to generate combinations of a list.
3. Create a simple state machine using the State monad.
4. Explore the Reader monad by building a configuration-based application.
5. Solve a problem using the IO monad, like reading from and writing to a file.

Can you explain the Maybe monad?

The Maybe monad is used to represent computations that might fail. It can either be 'Just value' if the computation is successful or 'Nothing' if it fails. This allows you to handle errors gracefully without using exceptions.

How do I use the List monad in Haskell?

The List monad allows you to work with non-deterministic computations. You can use it to generate all possible combinations of elements. For example, you can use the '>>=' operator to chain operations that return lists, effectively combining their results.

What is the State monad used for?

The State monad is used to manage stateful computations in a functional way. It allows you to pass state through a series of computations without explicitly threading it through each function.