Javascript Array pset(p)

Array.prototype.pset = function(p) {
 // create a set such that each element in the array is an object with properties
 var uniq = [];/* ww w  . ja  va2s  . c  o  m*/
 var a = [];
 var t = Object(this);
 for (var i = 0; i < t.length; i++) {
  var prop = t[i][p];
  if (uniq.indexOf(prop) == -1) {
   uniq.push(t[i][p]);
   a.push(t[i]);
  } else {
   continue;
  }
 }
 
 return a;
}