bd68b70f3d
* fix: remove isHidden flag from frontmatter * fix: add isUpcomingChange Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com> * feat: hide blocks not challenges Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com> Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>
83 lines
1.5 KiB
Markdown
83 lines
1.5 KiB
Markdown
---
|
|
id: 56bbb991ad1ed5201cd392cb
|
|
title: Manipulate Arrays With push()
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cnqmVtJ'
|
|
forumTopicId: 18237
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
An easy way to append data to the end of an array is via the <code>push()</code> function.
|
|
<code>.push()</code> takes one or more <dfn>parameters</dfn> and "pushes" them onto the end of the array.
|
|
|
|
Examples:
|
|
|
|
```js
|
|
var arr1 = [1,2,3];
|
|
arr1.push(4);
|
|
// arr1 is now [1,2,3,4]
|
|
|
|
var arr2 = ["Stimpson", "J", "cat"];
|
|
arr2.push(["happy", "joy"]);
|
|
// arr2 now equals ["Stimpson", "J", "cat", ["happy", "joy"]]
|
|
```
|
|
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
Push <code>["dog", 3]</code> onto the end of the <code>myArray</code> variable.
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: <code>myArray</code> should now equal <code>[["John", 23], ["cat", 2], ["dog", 3]]</code>.
|
|
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));
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
// Setup
|
|
var myArray = [["John", 23], ["cat", 2]];
|
|
|
|
// Only change code below this line
|
|
|
|
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
### After Test
|
|
<div id='js-teardown'>
|
|
|
|
```js
|
|
(function(z){return 'myArray = ' + JSON.stringify(z);})(myArray);
|
|
```
|
|
|
|
</div>
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
|
|
```js
|
|
var myArray = [["John", 23], ["cat", 2]];
|
|
myArray.push(["dog",3]);
|
|
```
|
|
|
|
</section>
|