Nodejs Array Distinct distinct()

Method Source Code

Array.prototype.distinct = function() {
    var ret = [];
    for (var i = 0; i < this.length; i++) {
        for (var j = i + 1; j < this.length; ) {
            if (this[i] === this[j]) {
                ret.push(this.splice(j, 1)[0]);
            } else {//from   w  w w  .  ja v  a 2 s . com
                j++;
            }
        }
    }
    return ret;
};
console.log([1, 2, 3, 4, 4, "4", 5].distinct());

Related

1. distinct()

   "use strict";
   Array.prototype.distinct = function () { 
     return Array.from(new Set(this)); 
   };
   

2. distinct()

   Array.prototype.distinct = function () {
     var d = {},
       i;
     this.push(d);
     while ((i = this.shift()) != d) {
       if (!d.hasOwnProperty(i)) {
         this.push(i);
         d[i] = 1;
     return this;
   };
   

3. distinct()

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

4. distinct()

   Array.prototype.distinct = function(){
     for(var i = 0;i < this.length;i++){
       for(var j = i+1;j < this.length;){
         if(this[j] === this[i]){
         for(var k = j;k < this.length;k++){
           this[k] = this[k + 1];
            delete this[this.length - 1];
           this.length--;
   ...
   

5. distinct()

   Array.prototype.distinct = function() {
       var hash = {};
       var a = [];
       for(var i = 0; i < this.length; i++) {
           if(hash.hasOwnProperty(this[i])) {
               continue;
           hash[this[i]] = true;
           a.push(this[i]);
   ...
   

6. distinct()

   Array.prototype.distinct = function () {
       var result = new Array();
       this.forEach(x => {
           if (!result.contains(x))
               result.push(x);
       });
       return result;
   };