Nodejs Array Unique unique()

Here you can find the source of unique()

Method Source Code

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;
  }//from  w w  w. jav a  2  s. c  o m
}

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;
};

Related

  1. 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;
    ...
    
  2. unique()
    Array.prototype.unique = function() {
      var seen = {}
      return this.filter(function(x) {
        if (seen[x])
          return
        seen[x] = true
        return x
      })
    
  3. 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);
    };
    
  4. 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;
    ...
    
  5. unique()
    Array.prototype.unique = function() {
        return this.reduce(function(p, c) { 
                        if (p.indexOf(c) < 0) p.push(c);
                        return p;
                    }, []);
    
  6. unique()
    Array.prototype.unique = function() {
      var a=[];
      for (var b = 0; b < this.length; b++) {
        if(a.indexOf(this[b]) == -1) {
          a.push(this[b])
      return a
    
  7. unique()
    Array.prototype.unique = function() {
      var arr = [];
      for (var i = 0; i < this.length; i++) {
        if (!arr.contains(this[i])) {
          arr.push(this[i]);
      return arr;
    function lowestUnique(str) {
      var arr = str.split(" ");
      var length = arr.length;
      var mapObj = {};
      var uniqueArr = arr.unique();
      for (var i = 0; i < length; i++) {
        mapObj[arr[i]] = 1 + (mapObj[arr[i]] || 0);
      var lowestNum = 100000000000;
      for (var n = 0; n < uniqueArr.length; n++) {
        if (mapObj[uniqueArr[n]] == 1) {
          if (lowestNum > uniqueArr[n]) {
            lowestNum = uniqueArr[n];
      if (lowestNum === 100000000000) {
        console.log(0);
      } else {
        arr.filter(function(e, ind, array) {
          if (e == lowestNum) {
            console.log(ind + 1);
        });
    
  8. 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());
    
  9. 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);
    ...