Debugging Haskell Type Errors

Fixing Haskell type errors can be hard . Learning how to understand and fix type errors was the first real obstacle I faced when I first picked up the language. I’ve seen the same tendency with every Haskell beginner I’ve taught. With a bit of experience, I got so used to the quirks of GHC’s typechecker and Haskell’s standard library that I could resolve most type errors intuitively. Most but not…