Return Unique Array

gistfile1.js

/* Return a unique array
 * myArray = ["ccc","aaa","bbb","aaa"];
 * x = myArray.getUnique(); // x = ["ccc","aaa","bbb"]
 * y = myArray.getUnique(true); // y = ["aaa","bbb","ccc"]
 */
// Slightly faster version than getUnique2; Modified from
// http://dreaminginjavascript.wordpress.com/2008/08/22/eliminating-duplicates/
Array.prototype.getUnique1 = function(s){
 var c, a = [], o = {}, i, j = 0, l = this.length;
 for(i=0; i<l; ++i){
  c = this[i];
  if (!o[c]) {
   o[c] = {};
   a[j++] = c;
  }
 }
 return (s) ? a.sort() : a;
};

// original script
Array.prototype.getUnique2 = function(s){
 var u = {}, a = [], i, l = this.length;
 for(i = 0; i < l; ++i){
  if(this[i] in u) { continue; }
  a.push(this[i]);
  u[this[i]] = 1;
 }
 return (s) ? a.sort() : a;
};