[Ocaml-lib-devel] Proposal: ExtArray.Array.iter

[Denis B. <db...@gm...>]

I've been building a compiler front-end (lex -> parse -> IR) in OCaml
and frequently have to make use of List.iter2 --- and I find it
annoying that there is no counterpart for arrays. Hasn't anyone needed
this before?

It's not hard to write. In fact, even better, it's written [1]. I'll
spruce it up if it doesn't meet the ExtLib standards.

-Denis

[1]
  (** Like {!List.iter2}, but for arrays.

      @raise Invalid_argument if the length of [a1] does not equal the
length of [a2]. *)
  let iter2 f a1 a2 =
    if Array.length a1 <> Array.length a2
    then raise (Invalid_argument "Array.iter2");

    for i = 0 to Array.length a1 do
      f a1.(i) a2.(i);
    done;;