7c3cbbbfd5
* chore(i8n,learn): processed translations * Update curriculum/challenges/chinese/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.md Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> Co-authored-by: Crowdin Bot <support+bot@crowdin.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
101 lines
1.9 KiB
Markdown
101 lines
1.9 KiB
Markdown
---
|
|
id: 56533eb9ac21ba0edf2244cc
|
|
title: Accede a objetos anidados
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cRnRnfa'
|
|
forumTopicId: 16161
|
|
dashedName: accessing-nested-objects
|
|
---
|
|
|
|
# --description--
|
|
|
|
Se puede acceder a las sub propiedades de objetos encadenando la notación de puntos o corchetes.
|
|
|
|
Aquí hay un objeto anidado:
|
|
|
|
```js
|
|
var ourStorage = {
|
|
"desk": {
|
|
"drawer": "stapler"
|
|
},
|
|
"cabinet": {
|
|
"top drawer": {
|
|
"folder1": "a file",
|
|
"folder2": "secrets"
|
|
},
|
|
"bottom drawer": "soda"
|
|
}
|
|
};
|
|
ourStorage.cabinet["top drawer"].folder2;
|
|
ourStorage.desk.drawer;
|
|
```
|
|
|
|
`ourStorage.cabinet["top drawer"].folder2` sería la cadena `secrets` y `ourStorage.desk.drawer` sería la cadena `stapler`.
|
|
|
|
# --instructions--
|
|
|
|
Accede al objeto `myStorage` y asigna el contenido de la propiedad `glove box` a la variable `gloveBoxContents`. Utiliza la notación de puntos para todas las propiedades cuando sea posible, de lo contrario utiliza la notación de corchetes.
|
|
|
|
# --hints--
|
|
|
|
`gloveBoxContents` debe ser igual a la cadena `maps`.
|
|
|
|
```js
|
|
assert(gloveBoxContents === 'maps');
|
|
```
|
|
|
|
Tu código debe utilizar notación de puntos y de corchetes para acceder a `myStorage`.
|
|
|
|
```js
|
|
assert(/=\s*myStorage\.car\.inside\[\s*("|')glove box\1\s*\]/g.test(code));
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --after-user-code--
|
|
|
|
```js
|
|
(function(x) {
|
|
if(typeof x != 'undefined') {
|
|
return "gloveBoxContents = " + x;
|
|
}
|
|
return "gloveBoxContents is undefined";
|
|
})(gloveBoxContents);
|
|
```
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
// Setup
|
|
var myStorage = {
|
|
"car": {
|
|
"inside": {
|
|
"glove box": "maps",
|
|
"passenger seat": "crumbs"
|
|
},
|
|
"outside": {
|
|
"trunk": "jack"
|
|
}
|
|
}
|
|
};
|
|
|
|
var gloveBoxContents = undefined; // Change this line
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
var myStorage = {
|
|
"car":{
|
|
"inside":{
|
|
"glove box":"maps",
|
|
"passenger seat":"crumbs"
|
|
},
|
|
"outside":{
|
|
"trunk":"jack"
|
|
}
|
|
}
|
|
};
|
|
var gloveBoxContents = myStorage.car.inside["glove box"];
|
|
```
|