freeCodeCamp/curriculum/challenges/spanish/08-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.spanish.md

---
id: 587d8253367417b2b2512c6d
title: Perform an Intersection on Two Sets of Data
localeTitle: Realizar una intersección en dos conjuntos de datos
challengeType: 1
---

## Description
<section id='description'> 
En este ejercicio vamos a realizar una intersección en 2 conjuntos de datos. Crearemos un método en nuestra estructura de datos del <code>Set</code> llamada <code>intersection</code> . Una intersección de conjuntos representa todos los valores que son comunes a dos o más conjuntos. Este método debe tomar otro <code>Set</code> como argumento y devolver la <code>intersection</code> de los dos conjuntos. 
Por ejemplo, si <code>setA = [&#39;a&#39;,&#39;b&#39;,&#39;c&#39;]</code> y <code>setB = [&#39;a&#39;,&#39;b&#39;,&#39;d&#39;,&#39;e&#39;]</code> , entonces la intersección de setA y setB es: <code>setA.intersection(setB) = [&#39;a&#39;, &#39;b&#39;]</code> . 
</section>

## Instructions
<section id='instructions'> 

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: Tu clase <code>Set</code> debería tener un método de <code>intersection</code> .
    testString: 'assert(function(){var test = new Set(); return (typeof test.intersection === "function")}, "Your <code>Set</code> class should have a <code>intersection</code> method.");'
  - text: Se devolvió la colección adecuada.
    testString: 'assert(function(){  var setA = new Set();  var setB = new Set();  setA.add("a");  setA.add("b");  setA.add("c");  setB.add("c");  setB.add("d");  var intersectionSetAB = setA.intersection(setB); return (intersectionSetAB.size() === 1 && intersectionSetAB.values()[0] === "c")}, "The proper collection was returned");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function Set() {
    // the var collection will hold the set
    var collection = [];
    // this method will check for the presence of an element and return true or false
    this.has = function(element) {
        return (collection.indexOf(element) !== -1);
    };
    // this method will return all the values in the set
    this.values = function() {
        return collection;
    };
   // this method will add an element to the set
    this.add = function(element) {
        if(!this.has(element)){
            collection.push(element);
            return true;
        }
        return false;
    };
    // this method will remove an element from a set
    this.remove = function(element) {
        if(this.has(element)){
           var index = collection.indexOf(element);
            collection.splice(index,1);
            return true;
        }
        return false;
    };
    // this method will return the size of the collection
    this.size = function() {
        return collection.length;
    };
    // this method will return the union of two sets
    this.union = function(otherSet) {
        var unionSet = new Set();
        var firstSet = this.values();
        var secondSet = otherSet.values();
        firstSet.forEach(function(e){
            unionSet.add(e);
        });
        secondSet.forEach(function(e){
            unionSet.add(e);
        });
        return unionSet;
    };
    // change code below this line
    // change code above this line
}
```

</div>



</section>

## Solution
<section id='solution'>


```js
function Set() {var collection = []; this.has = function(e){return(collection.indexOf(e) !== -1);};this.values = function() {return collection;};this.add = function(element) {if (!this.has(element)) {collection.push(element);return true;} else {return false;}};this.remove = function(element) {if(this.has(element)) {var i = collection.indexOf(element);collection.splice(i, 1);return true;}return false;};this.size = function() {return collection.length;};this.union = function(set) {var u = new Set();var c = this.values();var s = set.values();c.forEach(function(element){u.add(element);});s.forEach(function(element){u.add(element);});return u;};this.intersection = function(set) {var i = new Set();var c = this.values();c.forEach(function(element){if(s.has(element)) i.add(element);});};}
```

</section>