freeCodeCamp/curriculum/challenges/en/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.en.md

---
id: 587d7b8a367417b2b2512b4d
title: Use Destructuring Assignment to Pass an Object as a Function's Parameters
challengeType: 1
---

## Description
<section id='description'>
In some cases, you can destructure the object in a function argument itself.
Consider the code below:
<blockquote>const profileUpdate = (profileData) => {<br>&nbsp;&nbsp;const { name, age, nationality, location } = profileData;<br>&nbsp;&nbsp;// do something with these variables<br>}</blockquote>
This effectively destructures the object sent into the function. This can also be done in-place:
<blockquote>const profileUpdate = ({ name, age, nationality, location }) => {<br>&nbsp;&nbsp;/* do something with these fields */<br>}</blockquote>
This removes some extra lines and makes our code look neat.
This has the added benefit of not having to manipulate an entire object in a function; only the fields that are needed are copied inside the function.
</section>

## Instructions
<section id='instructions'>
Use destructuring assignment within the argument to the function <code>half</code> to send only <code>max</code> and <code>min</code> inside the function.
</section>

## Tests
<section id='tests'>

```yml
- text: <code>stats</code> should be an <code>object</code>.
  testString: 'assert(typeof stats === ''object'', ''<code>stats</code> should be an <code>object</code>.'');'
- text: <code>half(stats)</code> should be <code>28.015</code>
  testString: 'assert(half(stats) === 28.015, ''<code>half(stats)</code> should be <code>28.015</code>'');'
- text: Destructuring was used.
  testString: 'getUserInput => assert(getUserInput(''index'').match(/\(\s*\{\s*\w+\s*,\s*\w+\s*\}\s*\)/g), ''Destructuring was used.'');'

```

</section>

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

<div id='js-seed'>

```js
const stats = {
  max: 56.78,
  standard_deviation: 4.34,
  median: 34.54,
  mode: 23.87,
  min: -0.75,
  average: 35.85
};
const half = (function() {
  "use strict"; // do not change this line

  // change code below this line
  return function half(stats) {
    // use function argument destructuring
    return (stats.max + stats.min) / 2.0;
  };
  // change code above this line

})();
console.log(stats); // should be object
console.log(half(stats)); // should be 28.015
```

</div>



</section>

## Solution
<section id='solution'>

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