---
id: 587d8255367417b2b2512c72
title: Use .has and .size on an ES6 Set
challengeType: 1
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert((function(){var test = checkSet([4,5,6], 3); test === [ false, 3 ]})(), "<code>checkSet([4, 5, 6], 3)</code> should return [ false, 3 ]");'

```

</section>

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

<div id='js-seed'>

```js
function checkSet(arrToBeSet, checkValue){

   // change code below this line

   // change code above this line

}

checkSet([ 1, 2, 3], 2); // Should return [ true, 3 ]

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>