Suppose a scenario where: you need to execute an expensive operation which can fail or succeed. the result of the operation is modeled by using a result object Result<T>. The result object ...

The task Given the following string¹ one ' two 'three four the required function should split it in 3 tokens (one, two three, and four), in agreement with how the bash shell does: $ function ...

The following program assumes that /path/to/mypipe is a named pipe, e.g. created via mkfifo /path/to/mypipe, with no readers/writers waiting yet, runs two threads, of which the main thread keeps ...

If in a terminal I enter mkfifo /tmp/pipe echo hello > /tmp/pipe (which blocks) and in another I run the haskell program main = readFile "/tmp/foobar" >>= putStr then I see it ...

I’m working with large nested associative arrays in PHP and I need to apply transformations (like map, filter, reshape) immutably, meaning the original array should not be modified. The problem is ...

I am having trouble getting the following code to work. I got it to work originally, then I changed it so all the Nonterminals also have positions. And I added the method parseLexeme that transforms ...

In Haskell in Depth, Chapter 11, there's an example aimed at avoiding character escaping in GHCi, which is what happens automatically when you enter print "ë", as it'll be printed like "...

I am a beginner to functional programming where most of my experience comes from Java/Kotlin. From my understanding functional programming has special names for certain function signatures. Type ->...