If I have a function fun like:

I don’t quite understand how functions behave when working with applicative functors.
Here’s an example:

I don’t quite understand how functions behave when working with applicative functors.
Here’s an example:

Lets say I have:

I’m curious of different ways of combining Maybes. There’s a small example of what I am able to achieve with a do (I reckon using the fact Maybe is a monad), however for this particular example I’m wondering if I can just use the semigroup. I tried something like

Closed yesterday.

My newbie’s attempt to express the behavior of operator || from C/C++ in Haskell:

We are given the following API interface in 8th chapter of “Parallel and Concurrent Programming in Haskell” text,

String contataion. Is ++ operator or <> operator best?

Let’s say I want to simplify my case analysis. PatternSynonyms extension is perfect for it. I use COMPLETE pragma to avoid the warning about incomplete case analysis and the code is: