67 lines
2.3 KiB
Markdown
67 lines
2.3 KiB
Markdown
|
---
|
||
|
|
id: 587d7da9367417b2b2512b66
|
||
|
|
title: Combine Two Arrays Using the concat Method
|
||
|
|
localeTitle: Combina dos matrices usando el método concat
|
||
|
|
challengeType: 1
|
||
|
|
---
|
||
|
|
|
||
|
|
## Description
|
||
|
|
<section id='description'>
|
||
|
|
<code>Concatenation</code> significa unir elementos de extremo a extremo. JavaScript ofrece el método <code>concat</code> para cadenas y matrices que funcionan de la misma manera. Para las matrices, el método se llama en una, luego se proporciona otra matriz como el argumento a <code>concat</code> , que se agrega al final de la primera matriz. Devuelve una nueva matriz y no muta ninguna de las matrices originales. Aquí hay un ejemplo:
|
||
|
|
<blockquote>[1, 2, 3].concat([4, 5, 6]);<br>// Returns a new array [1, 2, 3, 4, 5, 6]</blockquote>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Instructions
|
||
|
|
<section id='instructions'>
|
||
|
|
Utilice el método <code>concat</code> en la función <code>nonMutatingConcat</code> para concatenar <code>attach</code> al final del <code>original</code> . La función debe devolver la matriz concatenada.
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Tests
|
||
|
|
<section id='tests'>
|
||
|
|
|
||
|
|
```yml
|
||
|
|
tests:
|
||
|
|
- text: Su código debe utilizar el método <code>concat</code> .
|
||
|
|
testString: 'assert(code.match(/\.concat/g), "Your code should use the <code>concat</code> method.");'
|
||
|
|
- text: La <code>first</code> matriz no debe cambiar.
|
||
|
|
testString: 'assert(JSON.stringify(first) === JSON.stringify([1, 2, 3]), "The <code>first</code> array should not change.");'
|
||
|
|
- text: La <code>second</code> matriz no debe cambiar.
|
||
|
|
testString: 'assert(JSON.stringify(second) === JSON.stringify([4, 5]), "The <code>second</code> array should not change.");'
|
||
|
|
- text: ' <code>nonMutatingConcat([1, 2, 3], [4, 5])</code> debe devolver <code>[1, 2, 3, 4, 5]</code> .'
|
||
|
|
testString: 'assert(JSON.stringify(nonMutatingConcat([1, 2, 3], [4, 5])) === JSON.stringify([1, 2, 3, 4, 5]), "<code>nonMutatingConcat([1, 2, 3], [4, 5])</code> should return <code>[1, 2, 3, 4, 5]</code>.");'
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Challenge Seed
|
||
|
|
<section id='challengeSeed'>
|
||
|
|
|
||
|
|
<div id='js-seed'>
|
||
|
|
|
||
|
|
```js
|
||
|
|
function nonMutatingConcat(original, attach) {
|
||
|
|
// Add your code below this line
|
||
|
|
|
||
|
|
|
||
|
|
// Add your code above this line
|
||
|
|
}
|
||
|
|
var first = [1, 2, 3];
|
||
|
|
var second = [4, 5];
|
||
|
|
nonMutatingConcat(first, second);
|
||
|
|
```
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Solution
|
||
|
|
<section id='solution'>
|
||
|
|
|
||
|
|
```js
|
||
|
|
// solution required
|
||
|
|
```
|
||
|
|
</section>
|