Nice reddit thread on quick prototyping of ideas in #haskell. https://amp.reddit.com/r/haskell/comments/7sr8k7/fast_prototyping_how_to_experiences/
@seanl :-) I find algebraic data types and a bag of libraries (like vectors, containers) quite pleasant to work with. I haven't yet learned to appreciate the lens. Also ease of refactoring with the aid of the compiler can help hack something together quickly and refactor later.
Give it a spin next time!