Question

I’d like to apply a functions stored in a list

let functions = [(fun () -> print_string "fun 1"); (fun () -> print_string "fun 2")]

with a high-order function like List.iter, to display “fun 1” and “fun 2”

Is there a way to do that ?

Answer 1

Here is the way to do it:

List.iter (fun f -> f()) functions

Your list consists of functions with the signature unit -> unit. Therefore, if you supply () as a parameter for each function, they will return unit which is obvious to use inside List.iter.