Monads

Watch https://www.youtube.com/watch?v=t1e8gqXLbsU to find out more about monads.

Monads are these interesting things which allow you to change how functions are composed or chained together. For example, the "List" monad, instead of passing one value to the next part of the computation, will call it several times with each value in the given list, and append the lists that get reported back together.