String.prototype.reverse() - A random snippet I made in the console

stringReverse.js

String.prototype.reverse = function() {
   var reversed = [];
   for(i=0; i< this.length; i++) {
     reversed[this.length - i] = this[i];
   }
   var rev_str = "";
   for(e=0;e<reversed.length;e++) {
     rev_str += reversed[e];
   }
   rev_str = rev_str.replace('undefined', '');
   return rev_str;
};