6dbec7e44f
* Added hints and solutions to Redux exercises solution to Redux exercise: Copy an Object with Object.assign * Added the full code for the solution
42 lines
1.0 KiB
Markdown
42 lines
1.0 KiB
Markdown
---
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title: Copy an Object with Object.assign
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---
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## Copy an Object with Object.assign
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The goal of this challenge is to enforce state immutability when state is an object.
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### Hint 1
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Use the method ```Object.assign({}, obj1, obj2)``` in return. Pass ```state``` as obj1.
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### Hint 2
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The obj2 should be the updated ```{key: value}``` pair of your state.
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### Solution
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```
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const defaultState = {
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user: 'CamperBot',
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status: 'offline',
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friends: '732,982',
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community: 'freeCodeCamp'
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};
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const immutableReducer = (state = defaultState, action) => {
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switch(action.type) {
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case 'ONLINE':
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// to enforce state immutability, return a new state object using Object.assign() method
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return Object.assign({}, state, {status: 'online'});
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default:
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return state;
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}
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};
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const wakeUp = () => {
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return {
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type: 'ONLINE'
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}
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};
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const store = Redux.createStore(immutableReducer);
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```
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