Nodejs Utililty Methods Array Unique

Array.prototype.unique3 = function(){
 var res = [];
 var json = {};
 var dejson = {};
 var length = 0;
 for(var i = 0; i < this.length; i++){
  if(!json[this[i].name]){
   dejson[this[i]] = this[i];
   console.log(dejson[this[i]]);
...

Array.prototype.unique3 = function(){
  var res = [1,2,3,4,1,2,3,4];
  var json = {};
  for(var i = 0; i < this.length; i++){
      if(!json[this[i]]) {
        res.push(this[i]);
        json[this[i]] = true;
  return res;
console.log(unique3());

Array.prototype.unique5 = function() {
    var res = [], hash = {};
    for(var i=0, elem; (elem = this[i]) != null; i++)  {
        if (!hash[elem])
            res.push(elem);
            hash[elem] = true;
    return res;

"use strict";
Array.prototype.unique = function Array_unique() {
    var unique = [];
    for (var i = 0; i < this.length; i++) {
        if (unique.indexOf(this[i]) === -1) {
            unique.push(this[i]);
    return unique;
...

function getGmtOffset() {
  var d = new Date();
  var gmtOffset = d.getTimezoneOffset() * 60;  
  return gmtOffset;
function getUnixTime(strDate) {
  var d = new Date(strDate);
  var unixTime = (d.getTime() / 1000);
  return unixTime;
...

Array.prototype.uniqueCounter = function () {
    "use strict";
  var counter = 0, l = this.length, i, j;
    for (i = 0; i < l; i += 1) {
    for (j = i + 1; j < l; j += 1) {
      if (this[i] === this[j]) {
        j = i =+ 1;
    counter += 1;
    return counter;
};

Array.prototype.uniqueDates = function() {
  var u = [];
  for (k=0; k<this.length; k++) {
    var currentDate = new Date(this[k].annum);
    if (u.map(Number).indexOf(+currentDate) < 0) {
      u.push(currentDate);
  return u;
...

Array.prototype.uniqueNonEmpty = function () {
  var noempties = true;
  var hash = {};
  for (var i=0 ; i<this.length ; i++) {
    if (!this[i] || this[i]=="") {
      noempties = false;
    } else {
      hash[this[i]] = "1";
  var hashlength=0;
  for (i in hash) {hashlength++};
  return (this.length===hashlength && noempties);

Array.prototype.uniqueObjects = function (props) {
    function compare(a, b) {
        var prop;
        if (props) {
            for (var j = 0; j < props.length; j++) {
                prop = props[j];
                if (a[prop] != b[prop]) {
                    return false;
        } else {
            for (prop in a) {
                if (a[prop] != b[prop]) {
                    return false;
        return true;
    return this.filter(function (item, index, list) {
        for (var i = 0; i < index; i++) {
            if (compare(item, list[i])) {
                return false;
        return true;
    });
};

Array.prototype.uniquelize = function() {
  var array = new Array();
  var length = this.length;
  for (var i = 0; i < length; i++) {
    if (!array.inArray(this[i])) {
      array.push(this[i]);
  return array;
...