Nodejs Array Unique unique(a)

Method Source Code

x = ''/*w  ww  .  j a va2s  .  c  o  m*/
Array.prototype.unique=function(a){
  return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0
});
// n = letters, r = cant, res = string

function getCombi(vect,res,n,r){
   if(n == 0){
      x = x + res +":";
   }else{
      for(var i = 0; i < r; i++){
          getCombi(vect,res + vect[i], n-1,r);
      }
   }
}
line = "1,a";
v = line.split(",")[1].split("");
n = v.length;
r = parseInt(line.split(",")[0]);
getCombi(v,'',n,r);
console.log(x.substring(0,x.length-1).split(":").unique().join(","));

Related

1. unique()

   Array.prototype.unique = function(){
     this.sort((x,y) => x-y);
     for(var i=0; i<this.length-1; ){
       if(this[i]==this[i+1])
         this.splice(i,1);
       else i++;
     return this;
   

2. unique()

   Array.prototype.unique = function() 
       var h = {};  
       var r = [];
       this.forEach(function (item) { h[item] = true; });
       for (var item in h)
           r.push(item);
       return r; 
   

3. unique()

   Array.prototype.unique = function() {
     var uniqueArray = new Array();
     for(var i = 0; i < this.length; i++) {
       for(var j = i+1; j < this.length+1; j++) {
         if (this[i] !== null && this[i] === this[j]) 
           this[j] = null;
     for(i = 0; i < this.length; i++) {
   ...
   

4. unique(a)

   Array.prototype.unique=function(a){
     return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0
   });
   

5. unique(a)

   Array.prototype.unique = function(a) {
       return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0
   });
   

6. unique(a)

   Array.prototype.unique = function(a) {
       return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0
   });
   

7. unique(b)

   Array.prototype.unique = function(b) {
       var a = [], i, l = this.length;
       for (i = 0; i < l; i++) {
           if (a.indexOf(this[i], 0, b) < 0) {
               a.push(this[i]);
       return a;
   };
   ...
   

8. unique(b)

   Array.prototype.unique = function(b) {
     var a = [], i, l = this.length;
     for (i = 0; i < l; i++) {
       if (a.indexOf(this[i], 0, b) < 0) {
         a.push(this[i]);
     return a;
   };
   ...
   

9. unique(callback)

   Array.prototype.unique = function(callback) {
     var o = {}, i, l = this.length, r = [];
     for (i=0; i<l; i+=1) {
       var val = callback(this[i]);
       o[val] = this[i];
     for (i in o) {
       r.push(o[i]);
     return r;
   };