Bifunctors have a map function with this signature: bimap :: (a -> b) -> (c -> d) -> p a c -> p b d You could also have a map like this: othermap :: ((a, c) -> (b, d)) -> p a...

ZIO (https://zio.dev/) is a scala framework which has at its core the ZIO[R, E, A] datastructure and its site gives the following information for the three parameters: ZIO The ZIO[R, E, A] data ty...

I'm learning about Haskell by working through the book Haskell Programming from First Principles, Allen & Moronuki. In the exercises for the chapter on Monad Transformers, Functor & Applic...

There is a bit of overlap between Bifunctor and Arrow methods: class Bifunctor p where first :: (a -> a') -> p a b -> p a' b second :: (b -> b') -> p a b -> p a b' bimap :: (a...

I was thinking about unzipping operations and realized that one way to express them is by traversing in a Biapplicative functor. import Data.Biapplicative class Traversable2 t where traverse2 ::...

I have code (in C# actually, but this question has nothing to do with C# specifically, so I will speak of all my types in Haskell-speak) where I am working inside of an Either a b. I then bind a fu...

I'm relatively new to Haskell and having trouble understanding the utility of bifunctors. I think I understand them in theory: say for example if I wanted to map across a type that abstracts multip...

While musing what more useful standard class to suggest to this one class Coordinate c where createCoordinate :: x -> y -> c x y getFirst :: c x y -> x getSecond :: c x y -> y addC...

I've always only used Java 6 and am right now catching up to learn what's new in Java 8. I was reading this article here: http://www.drdobbs.com/jvm/lambda-expressions-in-java-8/240166764?pgno=2 A...