Refactored substitute using Array.map and Array.join

fizzbuzz3.js

var makeSubstitution = function (divisor, substitute) {
  return function substituteNumberBy(acc, number) {
            if (number % divisor == 0) {
              acc += substitute;
            }
            return acc;
          };
};

var substitute = function (numbers, substitutions) {
  function substituteOne (number) {
    var res = (function f(acc, remainingSubstitutions) {
      if (remainingSubstitutions.length == 0) {
        return acc;
      } else {
        acc = remainingSubstitutions[0](acc, number);
        return f(acc, remainingSubstitutions.slice(1));
      }
    }("", substitutions));

    if (res != "")
      return res;

    return String(number);
  }

  return numbers.map(substituteOne).join(" ");
};