---
id: a3f503de51cfab748ff001aa
title: Pairwise
challengeType: 5
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert.deepEqual(pairwise([1, 4, 2, 3, 0, 5], 7), 11, "<code>pairwise([1, 4, 2, 3, 0, 5], 7)</code> should return 11.");'
  - text: ''
    testString: 'assert.deepEqual(pairwise([1, 3, 2, 4], 4), 1, "<code>pairwise([1, 3, 2, 4], 4)</code> should return 1.");'
  - text: ''
    testString: 'assert.deepEqual(pairwise([1, 1, 1], 2), 1, "<code>pairwise([1, 1, 1], 2)</code> should return 1.");'
  - text: ''
    testString: 'assert.deepEqual(pairwise([0, 0, 0, 0, 1, 1], 1), 10, "<code>pairwise([0, 0, 0, 0, 1, 1], 1)</code> should return 10.");'
  - text: ''
    testString: 'assert.deepEqual(pairwise([], 100), 0, "<code>pairwise([], 100)</code> should return 0.");'

```

</section>

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

<div id='js-seed'>

```js
function pairwise(arr, arg) {
  return arg;
}

pairwise([1,4,2,3,0,5], 7);

```

</div>



</section>

## Solution
<section id='solution'>

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