(***********************************************************************)
(*                                                                     *)
(*                           Objective Caml                            *)
(*                                                                     *)
(*               Pierre Weis, projet Cristal, INRIA Rocquencourt       *)
(*                                                                     *)
(*  Copyright 2001 Institut National de Recherche en Informatique et   *)
(*  en Automatique.  All rights reserved.  This file is distributed    *)
(*  only by permission.                                                *)
(*                                                                     *)
(***********************************************************************)

let explode s =
  let rec expl i l =
    if i < 0 then l else
    expl (i - 1) (s.[i] :: l) in
  expl (String.length s - 1) [];;

let implode l =
  let result = String.create (List.length l) in
  let rec imp i = function
  | [] -> result
  | c :: l -> result.[i] <- c; imp (i + 1) l in
  imp 0 l;;