111 lines
2.7 KiB
Markdown
111 lines
2.7 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244cd
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title: Accessing Nested Arrays
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localeTitle: Acceso a matrices anidadas
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challengeType: 1
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guideUrl: 'https://spanish.freecodecamp.org/guide/certificates/access-array-data-with-indexes'
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---
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## Description
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<section id='description'>
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Como hemos visto en ejemplos anteriores, los objetos pueden contener tanto objetos anidados como matrices anidadas. Al igual que para acceder a objetos anidados, la notación de paréntesis de arrays se puede encadenar para acceder a arrays anidados.
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Aquí hay un ejemplo de cómo acceder a una matriz anidada:
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<blockquote>var ourPets = [<br> {<br> animalType: "cat",<br> names: [<br> "Meowzer",<br> "Fluffy",<br> "Kit-Cat"<br> ]<br> },<br> {<br> animalType: "dog",<br> names: [<br> "Spot",<br> "Bowser",<br> "Frankie"<br> ]<br> }<br>];<br>ourPets[0].names[1]; // "Fluffy"<br>ourPets[1].names[0]; // "Spot"</blockquote>
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</section>
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## Instructions
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<section id='instructions'>
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Recupere el segundo árbol de la variable <code>myPlants</code> usando el punto de objeto y la notación de corchete de matriz.
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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>secondTree</code> debe ser igual a "pino"
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testString: 'assert(secondTree === "pine", "<code>secondTree</code> should equal "pine"");'
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- text: Use la notación de puntos y corchetes para acceder a <code>myPlants</code>
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testString: 'assert(/=\s*myPlants\[1\].list\[1\]/.test(code), "Use dot and bracket notation to access <code>myPlants</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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// Setup
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var myPlants = [
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{
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type: "flowers",
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list: [
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"rose",
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"tulip",
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"dandelion"
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]
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},
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{
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type: "trees",
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list: [
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"fir",
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"pine",
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"birch"
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]
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}
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];
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// Only change code below this line
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var secondTree = ""; // Change 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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console.info('after the test');
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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 myPlants = [
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{
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type: "flowers",
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list: [
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"rose",
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"tulip",
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"dandelion"
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]
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},
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{
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type: "trees",
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list: [
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"fir",
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"pine",
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"birch"
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]
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}
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];
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// Only change code below this line
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var secondTree = myPlants[1].list[1];
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```
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</section>
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