Thus, in Haskell it is considered good practice to always label your functions with their type signatures. Haskell is 20 years old, and this has been made 'goo

Thus, in Haskell it is considered good practice to always label your functions with their type signatures. Haskell is 20 years old, and this has been made 'good practice' only very recently -- I'd date it to dons's revival blitz a few years ago. A professor of mine who'd been using Haskell from the beginning was annoyed by their use.