Files
freeCodeCamp/curriculum/challenges/espanol/03-front-end-development-libraries/redux/copy-an-object-with-object.assign.md
Shaun Hamilton c2a11ad00d feat: add 'back/front end' in curriculum (#42596)
* chore: rename APIs and Microservices to include "Backend" (#42515)

* fix typo

* fix typo

* undo change

* Corrected grammar mistake

Corrected a grammar mistake by removing a comma.

* change APIs and Microservices cert title

* update title

* Change APIs and Microservices certi title

* Update translations.json

* update title

* feat(curriculum): rename apis and microservices cert

* rename folder structure

* rename certificate

* rename learn Markdown

* apis-and-microservices -> back-end-development-and-apis

* update backend meta

* update i18n langs and cypress test

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

* fix: add development to front-end libraries (#42512)

* fix: added-the-word-Development-to-front-end-libraries

* fix/added-the-word-Development-to-front-end-libraries

* fix/added-word-development-to-front-end-libraries-in-other-related-files

* fix/added-the-word-Development-to-front-end-and-all-related-files

* fix/removed-typos-from-last-commit-in-index.md

* fix/reverted-changes-that-i-made-to-dependecies

* fix/removed xvfg

* fix/reverted changes that i made to package.json

* remove unwanted changes

* front-end-development-libraries changes

* rename backend certSlug and README

* update i18n folder names and keys

* test: add legacy path redirect tests

This uses serve.json from the client-config repo, since we currently use
that in production

* fix: create public dir before moving serve.json

* fix: add missing script

* refactor: collect redirect tests

* test: convert to cy.location for stricter tests

* rename certificate folder to 00-certificates

* change crowdin config to recognise new certificates location

* allow translations to be used

Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>

* add forwards slashes to path redirects

* fix cypress path tests again

* plese cypress

* fix: test different challenge

Okay so I literally have no idea why this one particular challenge
fails in Cypress Firefox ONLY. Tom and I paired and spun a full build
instance and confirmed in Firefox the page loads and redirects as
expected. Changing to another bootstrap challenge passes Cypress firefox
locally. Absolutely boggled by this.

AAAAAAAAAAAAAAA

* fix: separate the test

Okay apparently the test does not work unless we separate it into
a different `it` statement.

>:( >:( >:( >:(

Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com>
Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com>
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
2021-08-13 21:57:13 -05:00

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Markdown

---
id: 5a24c314108439a4d403615b
title: Copia un objeto con Object.assign
challengeType: 6
forumTopicId: 301437
dashedName: copy-an-object-with-object-assign
---
# --description--
Los últimos desafíos trabajaron con arreglos, pero hay maneras de ayudar a reforzar la inmutabilidad del estado cuando el estado es también un `object`. Una herramienta útil para el manejo de objetos es la utilidad `Object.assign()`. `Object.assign()` toma un objeto de destino y objetos de origen y asigna propiedades de los objetos de origen al objeto de destino. Las propiedades que coinciden se sobrescriben con las propiedades de los objetos de origen. Este comportamiento se utiliza comúnmente para hacer copias superficiales de objetos pasando un objeto vacío como primer argumento seguido por el/los objeto(s) que se desea(n) copiar. Aquí hay un ejemplo:
```js
const newObject = Object.assign({}, obj1, obj2);
```
Esto crea `newObject` como un nuevo `object`, que contiene las propiedades que existen actualmente en `obj1` y `obj2`.
# --instructions--
El estado y las acciones de Redux fueron modificados para manejar un `object` para el `state`. Edita el código para devolver un nuevo objeto `state` para las acciones de tipo `ONLINE`, que establece la propiedad `status` a la cadena `online`. Intenta utilizar `Object.assign()` para completar el desafío.
# --hints--
El almacén Redux debe existir e inicializarse con un estado equivalente al objeto `defaultState` declarado en la línea 1.
```js
assert(
(function () {
const expectedState = {
user: 'CamperBot',
status: 'offline',
friends: '732,982',
community: 'freeCodeCamp'
};
const initialState = store.getState();
return DeepEqual(expectedState, initialState);
})()
);
```
`wakeUp` e `immutableReducer` deben ser funciones.
```js
assert(typeof wakeUp === 'function' && typeof immutableReducer === 'function');
```
El envío de una acción de tipo `ONLINE` debe actualizar la propiedad `status` del estado a `online` y NO debe mutar el estado.
```js
assert(
(function () {
const initialState = store.getState();
const isFrozen = DeepFreeze(initialState);
store.dispatch({ type: 'ONLINE' });
const finalState = store.getState();
const expectedState = {
user: 'CamperBot',
status: 'online',
friends: '732,982',
community: 'freeCodeCamp'
};
return isFrozen && DeepEqual(finalState, expectedState);
})()
);
```
`Object.assign` debe utilizarse para devolver el nuevo estado.
```js
(getUserInput) => assert(getUserInput('index').includes('Object.assign'));
```
# --seed--
## --seed-contents--
```js
const defaultState = {
user: 'CamperBot',
status: 'offline',
friends: '732,982',
community: 'freeCodeCamp'
};
const immutableReducer = (state = defaultState, action) => {
switch(action.type) {
case 'ONLINE':
// Don't mutate state here or the tests will fail
return
default:
return state;
}
};
const wakeUp = () => {
return {
type: 'ONLINE'
}
};
const store = Redux.createStore(immutableReducer);
```
# --solutions--
```js
const defaultState = {
user: 'CamperBot',
status: 'offline',
friends: '732,982',
community: 'freeCodeCamp'
};
const immutableReducer = (state = defaultState, action) => {
switch(action.type) {
case 'ONLINE':
return Object.assign({}, state, {
status: 'online'
});
default:
return state;
}
};
const wakeUp = () => {
return {
type: 'ONLINE'
}
};
const store = Redux.createStore(immutableReducer);
```