I probably should have been more explicit: I use higher order functions and recursion all over the place in higher level languages that I use, so I'm familiar w

I probably should have been more explicit: I use higher order functions and recursion all over the place in higher level languages that I use, so I'm familiar with parts of functional programming. But structuring impure programs in Haskell still has taken a long time to get used to (and I'm not great at it yet).