76 lines
2.2 KiB
Markdown
76 lines
2.2 KiB
Markdown
---
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id: 587d7b8a367417b2b2512b4f
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title: Write Concise Object Literal Declarations Using Simple Fields
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challengeType: 1
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---
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## Description
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<section id='description'>
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ES6 adds some nice support for easily defining object literals.
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Consider the following code:
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<blockquote>const getMousePosition = (x, y) => ({<br> x: x,<br> y: y<br>});</blockquote>
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<code>getMousePosition</code> is a simple function that returns an object containing two fields.
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ES6 provides the syntactic sugar to eliminate the redundancy of having to write <code>x: x</code>. You can simply write <code>x</code> once, and it will be converted to<code>x: x</code> (or something equivalent) under the hood.
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Here is the same function from above rewritten to use this new syntax:
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<blockquote>const getMousePosition = (x, y) => ({ x, y });</blockquote>
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</section>
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## Instructions
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<section id='instructions'>
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Use simple fields with object literals to create and return a <code>Person</code> object with <code>name</code>, <code>age</code> and <code>gender</code> properties.
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 'The output is <code>{name: "Zodiac Hasbro", age: 56, gender: "male"}</code>.'
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testString: 'assert((() => {const res={name:"Zodiac Hasbro",age:56,gender:"male"}; const person=createPerson("Zodiac Hasbro", 56, "male"); return Object.keys(person).every(k => person[k] === res[k]);})(), ''The output is <code>{name: "Zodiac Hasbro", age: 56, gender: "male"}</code>.'');'
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- text: No <code>key:value</code> were used.
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testString: getUserInput => assert(!getUserInput('index').match(/:/g), 'No <code>key:value</code> were used.');
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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const createPerson = (name, age, gender) => {
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"use strict";
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// change code below this line
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return {
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name: name,
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age: age,
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gender: gender
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};
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// change code above this line
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};
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console.log(createPerson("Zodiac Hasbro", 56, "male")); // returns a proper object
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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const createPerson = (name, age, gender) => {
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"use strict";
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return {
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name,
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age,
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gender
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};
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};
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```
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</section>
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