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| // useState(): | |
| Note: "However, unlike this.setState in a class, updating a state variable always replaces it instead of merging it." | |
| /* before - example 1 */ | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| count: 0 | |
| }; |
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| // mergeDeep({ a: {b: 2} }, { a: { b: 5 }}) | |
| // = { a: { b: 5 }} | |
| function mergeDeep(obj1, obj2) { | |
| let newObj = { ...obj2 }; | |
| const recurseObj = (obj1, obj2) => { | |
| Object.keys(obj1).forEach(key => { | |
| if (typeof obj1[key] === "object" && obj2[key] !== undefined) { |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>CSS Staggered fade up effect</title> | |
| </head> | |
| <script type="application/javascript"> | |
| </script> |
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| import React from 'react'; | |
| import { apiRequest, apiError, detectAndroid } from './Utils'; | |
| let FrontendComponent = ComposedComponent => { | |
| class FrontendClass extends ComposedComponent { | |
| constructor() { | |
| super(); |
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| var path = require('path'); | |
| var webpack = require('webpack'); | |
| var ExtractTextPlugin = require('extract-text-webpack-plugin'); | |
| var config = { | |
| watchOptions: { | |
| aggregateTimeout: 300, | |
| poll: 1000 | |
| }, |
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| class Node { | |
| constructor(data) { | |
| this.next = null; | |
| this.data = data; | |
| } | |
| } | |
| class LinkedList { | |
| constructor() { |