e.g. asking for a function via generics for an empty data type. Originally, I made those type error, and that was that. But it meant I would write the same instance over and over again. And that ...

We only write it once and can use it with many different types. Now, this function is not very impressive, but we can implement ... first. Haskell guarantees that for a particular type and a ...

To implement recursive functions in Haskell, you can use pattern matching to match the constructors of the data type, and use recursion to handle the substructures. For example, here is how you ...