--- 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> const { name, age, nationality, location } = profileData;<br> // 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> /* 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 tests: - 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>