Nodejs Array Unique uniqueObjects(props)

Method Source Code

Array.prototype.uniqueObjects = function (props) {
    function compare(a, b) {
        var prop;
        if (props) {
            for (var j = 0; j < props.length; j++) {
                prop = props[j];//from  w  ww . ja v a  2 s .c om
                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;
    });
};

Related

1. uniqueArray_unique()

   "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;
   ...
   

2. uniqueByKey(array, key)

   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;
   ...
   

3. uniqueCounter()

   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;
   };
   

4. uniqueDates()

   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;
   ...
   

5. uniqueNonEmpty()

   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);
   

6. uniquelize()

   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;
   ...
   

7. uniquelize()

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

8. uniquelize()

   Array.prototype.uniquelize = function () {
       var tmp = {},
           ret = [];
       for (var i = 0, j = this.length; i < j; i++) {
           if (!tmp[this[i]]) {
               tmp[this[i]] = 1;
               ret.push(this[i]);
       return ret;
   

9. uniquelizeES6()

   Array.prototype.uniquelizeES6=function(){
       return  [...new Set(this)]