Nodejs Array Unique unique()

Method Source Code

// works in es2015
Array.prototype.unique = function (){
   return Array.from(new Set(this));
}

let testArray = [1,2,5,4,2,6,1];/*from   ww  w.  j a va 2  s . c om*/

console.log(testArray.unique());

Related

1. unique

   Array.prototype.unique =
     function() {
       var a = [];
       var l = this.length;
       for(var i=0; i<l; i++) {
         for(var j=i+1; j<l; j++) {
           if (this[i] === this[j])
             j = ++i;
         a.push(this[i]);
       return a;
     };
   Date.prototype.today = function () {
       return ((this.getDate() < 10)?"0":"") + this.getDate() +"."+(((this.getMonth()+1) < 10)?"0":"") + (this.getMonth()+1) +"."+ this.getFullYear();
   Date.prototype.timeNow = function () {
        return ((this.getHours() < 10)?"0":"") + this.getHours() +":"+ ((this.getMinutes() < 10)?"0":"") + this.getMinutes() +":"+ ((this.getSeconds() < 10)?"0":"") + this.getSeconds();
   

2. unique()

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

3. unique()

   Array.prototype.unique=function(){
       return this.filter(function (x,i,self){
           return self.indexOf(x)===i;
       });
   

4. unique()

   Array.prototype.unique = function() {
      return this.sort().reduce( (a,e) => e === a[a.length-1] ? a : (a.push(e), a), [] )
   

5. unique()

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

6. unique()

   Array.prototype.unique = function() {
     var o = {}, i, l = this.length, r = [];
     for(i=0; i<l;i+=1) o[this[i]] = this[i];
     for(i in o) r.push(o[i]);
     return r;
   };
   

7. unique()

   Array.prototype.unique = function () {
     var o = new Object();
     var i, e;
     for (i = 0; e = this[i]; i++) {
       o[e] = 1
     };
     var a = new Array();
     for (e in o) {
       a.push (e)
   ...
   

8. unique()

   Array.prototype.unique = function(){
     'use strict';
     this.sort();
     var ret = [this[0]];
     for(var index=0; index < this.length; index++){
       if(this[index] != ret[ret.length - 1]){
         ret.push(this[index]);
     return ret;
   };
   

9. unique()

   Array.prototype.unique = function()
       var n = {},r=[];
       for(var i = 0; i < this.length; i++)
           if (!n[this[i]])
               n[this[i]] = true;
               r.push(this[i]);
   ...