The concept itself is extremely useful (in a programming language like Haskell, at least), but for whatever reason it resists understanding in the way most people want to teach it.
I'm not sure why it's different than other programming concepts in this way... maybe just because it's such an abstract concept where most people have no frame of reference. You don't appreciate it until you've used it in a bunch of different contexts and finally see why this one abstraction works for all of them
I'm not sure why it's different than other programming concepts in this way... maybe just because it's such an abstract concept where most people have no frame of reference. You don't appreciate it until you've used it in a bunch of different contexts and finally see why this one abstraction works for all of them