Nodejs Array Unique unique()

Method Source Code

Array.prototype.unique = function() {
    var newArr = [],
        origLen = this.length,//from   w w  w.j a v  a  2 s  .co  m
        found, x, y;

    for (x = 0; x < origLen; x++) {
        found = undefined;
        for (y = 0; y < newArr.length; y++) {
            if (this[x] === newArr[y]) {
                found = true;
                break;
            }
        }
        if (!found) {
            newArr.push(this[x]);
        }
    }
    return newArr;
}

Related

1. unique()

   Array.prototype.unique = function() {
     var json = {};
     var res = [];
     for(var i = 0;i < this.length;i++) {
       if(!json[this[i]]) {
         res.push(this[i]);
         json[this[i]] = true;
     console.log(json);
     return res;
   var a = [1,2,3,3,2,1,4,4,0,7,7,7,7,7];
   console.log(a.unique());
   

2. unique()

   Array.prototype.unique = function() {
     var output = {};
     for (var key = 0; key < this.length; key++) {
       output[this[key]] = this[key];
     var results = [];
     for (key in output) {
       var value = output[key];
       results.push(value);
   ...
   

3. unique()

   Array.prototype.unique = function(){
       var temp = {};
       for (var i = 0; i < this.length; i++)
           temp[this[i]] = true;
       var r = [];
       for (var k in temp)
           r.push(k);
       return r;
   

4. unique()

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

5. unique()

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

6. unique()

   Array.prototype.unique = function() {
       return this.reduce(function(accum, current) {
           if (accum.indexOf(current) < 0) {
               accum.push(current);
           return accum;
       }, []);
   };
   function mutation(arr) {
   ...
   

7. unique()

   Array.prototype.unique = function() {
       var a = this.concat();
       for(var i=0; i<a.length; ++i) {
           for(var j=i+1; j<a.length; ++j) {
               if(a[i] === a[j])
                   a.splice(j--, 1);
       return a;
   ...
   

8. unique()

   Array.prototype.unique = function()
       this.sort();
       var re=[this[0]];
       for(var i = 1; i < this.length; i++)
           if( this[i] !== re[re.length-1])
               re.push(this[i]);
   ...
   

9. unique()

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