Nodejs Array Unique unique()

Method Source Code

/**//from   www .ja v  a  2  s .c o m
 * http://codereview.stackexchange.com/questions/83717
 */
Array.prototype.unique = function() {
  var seen = {}
  return this.filter(function(x) {
    if (seen[x])
      return
    seen[x] = true
    return x
  })
}

Related

1. unique()

   Array.prototype.unique = function() {
     var key, output, value, _ref, _results;
     output = {};
     for (key = 0, _ref = this.length; 0 <= _ref ? key < _ref : key > _ref; 0 <= _ref ? key++ : key--) {
       output[this[key]] = this[key];
     _results = [];
     for (key in output) {
       value = output[key];
   ...
   

2. unique()

   Array.prototype.unique = function () {
       return this.filter(function (value, index, array) {
           return array.indexOf(value) === index;
       });
   };
   

3. unique()

   'use strict';
   Array.prototype.unique = function() {
     var newArray = [];
     for (var i = 0, l = this.length; i < l; i++) {
       if (newArray.indexOf(this[i]) === -1 && this[i] !== '') {
         newArray.push(this[i]);
     return newArray;
   ...
   

4. 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]);
   ...
   

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() {
     var array = [];
     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;
       array.push(this[i]);
     return(array);
   };
   

7. unique()

   Array.prototype.unique = function () {
     var r = new Array();
     o:for(var i = 0, n = this.length; i < n; i++)
       for(var x = 0, y = r.length; x < y; x++)
         if(r[x]==this[i])
           continue o;
   ...
   

8. unique()

   Array.prototype.unique = function() {
       return this.reduce(function(p, c) { 
                       if (p.indexOf(c) < 0) p.push(c);
                       return p;
                   }, []);
   

9. unique()

   function stringToBoolean(string) {
     switch(string.toLowerCase()) {
       case "true": case "yes": case "1": return true;
       case "false": case "no": case "0": case null: return false;
       default: return string;
   Array.prototype.unique = function() {
       var o = {},
   ...