Nodejs Array Intersect intersection(t)

Method Source Code

Array.prototype.intersection = function(t)
{
// s.intersection(t) -->
// new array with elements common to s and t
    var s = this.toHash();
    var t = t.toHash();
    var intersection = [];
    s.keys().forEach(function(item)
    {//  w  w w. j a  va 2 s. c o  m
        if (t.containsKey(item))
            intersection.push(item);
    });
    t.keys().forEach(function(item)
    {
        if (s.containsKey(item))
            intersection.push(item);
    });
    return intersection;
}

Related

1. intersect(b)

   Array.prototype.intersect = function(b) {
       var flip = {}, res = [];
       for (var i = 0; i < b.length; i++) flip[b[i]] = i;
       for (i = 0; i < this.length; i++)
           if (flip[this[i]] != undefined) res.push(this[i]);
       return res;
   

2. intersect(tab)

   Array.prototype.intersect = function(tab){
       var temp = [];
       for(var i = 0; i < this.length; i++){
           for(var k = 0; k < tab.length; k++){
               if(this[i] == tab[k]){
                   temp.push( this[i]);
                   break;
       return temp;
   };
   

3. intersectintersect(otherArray)

   Array.prototype.intersect = function intersect(otherArray) {
     return this.filter(function(item) {
       return otherArray.has(item);
     });
   };
   

4. intersection(arr)

   Array.prototype.intersection = function(arr){
     return this.filter(function(n){
       return arr.indexOf(n) != -1;
     });
   

5. intersection(arr)

   Array.prototype.intersection = function(arr) {
       var intersection = new Array();
       for (var i = 0; i < arr.length; ++i)
           if (this.contains(arr[i]))
               intersection.push(arr[i]);
       return intersection;