81 lines
1.6 KiB
Markdown
81 lines
1.6 KiB
Markdown
---
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id: 56bbb991ad1ed5201cd392cb
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title: Manipulate Arrays With push()
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cnqmVtJ'
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---
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## Description
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<section id='description'>
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An easy way to append data to the end of an array is via the <code>push()</code> function.
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<code>.push()</code> takes one or more <dfn>parameters</dfn> and "pushes" them onto the end of the array.
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```js
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var arr = [1,2,3];
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arr.push(4);
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// arr is now [1,2,3,4]
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```
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</section>
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## Instructions
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<section id='instructions'>
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Push <code>["dog", 3]</code> onto the end of the <code>myArray</code> variable.
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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: <code>myArray</code> should now equal <code>[["John", 23], ["cat", 2], ["dog", 3]]</code>.
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testString: assert((function(d){if(d[2] != undefined && d[0][0] == 'John' && d[0][1] === 23 && d[2][0] == 'dog' && d[2][1] === 3 && d[2].length == 2){return true;}else{return false;}})(myArray), '<code>myArray</code> should now equal <code>[["John", 23], ["cat", 2], ["dog", 3]]</code>.');
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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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// Example
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var ourArray = ["Stimpson", "J", "cat"];
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ourArray.push(["happy", "joy"]);
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// ourArray now equals ["Stimpson", "J", "cat", ["happy", "joy"]]
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// Setup
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var myArray = [["John", 23], ["cat", 2]];
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// Only change code below this line.
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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(function(z){return 'myArray = ' + JSON.stringify(z);})(myArray);
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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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var myArray = [["John", 23], ["cat", 2]];
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myArray.push(["dog",3]);
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```
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</section>
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