Below is the API for the OCaml standard library. It's directly copied over from the OCaml Manual, formatted to the Reason syntax and styled accordingly. The API docs are work-in-progress; we'll be polishing these gradually!
If you're targeting JavaScript, the API docs for BuckleScript includes all of below, plus JS-specific APIs.
sig val list : ('a -> 'a -> bool) -> 'a list -> 'a list val array : ('a -> 'a -> bool) -> 'a array -> unit val merge : ('a -> 'a -> bool) -> 'a list -> 'a list -> 'a list end