u/_jackdk_in r/haskell • Recommends
On “What is the 'Design Patterns' equivalent book in functional programming world?”
Many of the "classical" design patterns from the GoF don't really apply cleanly to Haskell because so many of them do things like reimplement partial application by storing some arguments in an object, or implement objects with a single "invoke" method to imitate functions as first-class values. Built-in language features render such patterns unnecessary. (Exception: the Interpreter Pattern, which Steve Yegge calls "the only GoF pattern that can help code get smaller", and the subject of a great Scala talk by Rúnar Bjarnason).
The "just use functions" advice is simple and true, but probably not helpful until you've already internalised it. Many of your software engineering instincts still…