reverse_string_1.js

String.prototype.reverse = makeReverseFunction();
 
function makeReverseFunction() {
  function reverse() {
    var string_array = this.split("");
    var length = this.length;
    var swap = function(a, b) {
      temp = string_array[a];
      string_array[a] = string_array[b];
      string_array[b] = temp;
    }
    for (head = 0; head < length/2; head++) {
      swap(head, length-head);
    }
    return string_array.join("");
  }
  return reverse;
}