Nodejs Array Unique unique()

Method Source Code

function SecondGreatLow(arr) {
 arr.sort(function (a,b){
   return a-b;/* ww w  . j  ava 2  s .c  om*/
 });
 arr = arr.unique();
 if (arr.length == 2){
    return arr[1]+ " "+ arr[0];
 } else {
    return arr[1]+ " " + arr[arr.length-2];
 }
}
Array.prototype.unique = function() {
    return this.reduce(function(accum, current) {
        if (accum.indexOf(current) < 0) {
            accum.push(current);
        }
        return accum;
    }, []);
}

console.log(SecondGreatLow([2, 2,2,42, 42, 180]));

var r = [1,2,2,3,24,3,453,5,55,65,,6,57677,7,7,7,878,8].unique();
console.log(r)

Related

1. unique()

   Array.prototype.unique = function () { 
     return this.filter((a, i) => this.indexOf(a) === i) 
   

2. unique()

   Array.prototype.unique = function () {
     var arr = this;
     return this.filter(function (el, idx) {
       return arr.lastIndexOf(el) === idx;
     });
   };
   

3. unique()

   Array.prototype.unique = function () {
     var r = [];
     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;
       r[r.length] = this[i];
   ...
   

4. 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;
   ...
   

5. unique()

   function getDomain(address) {
     return address.substring(address.indexOf('@') + 1);
   function cleanPhoneNo(str) {
     return str.replace(/[^\d]/g, '');
   function escapeRegExp(str) {
     var specials = new RegExp("[.*+?|()\\[\\]{}\\\\]", "g"); 
     return str.replace(specials, "\\$&");
   ...
   

6. unique()

   Array.prototype.unique = function() {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       var unique = [];
       for (var i = 0, l = this.length; i < l; i++) {
           var element = this[i];
           if (unique.indexOf(element) === -1) {
               unique.push(element);
   ...
   

7. unique()

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

8. 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) {
       if (o[i]) {
         r.push(o[i]);
     return r;
   ...
   

9. unique()

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