> Particularly, if you're using a language like Haskell or Ocaml, it helps to have at least a vague idea of what a functor actually is and where the idea comes

> Particularly, if you're using a language like Haskell or Ocaml, it helps to have at least a vague idea of what a functor actually is and where the idea comes from. (I actually only realized that functors were actually similar ideas in both languages a couple days back.) I could not agree more! Understanding the significance of particular keywords is quite important when failing to do so will affect your ability to successfully use the language. I distinguish that from my argument, which I premised on such knowledge not affecting one's ability to successfully use the language.