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class NewMessages extends Rect.Component { | |
updateInterval; | |
componentDidMount() { | |
this.updateInterval = setInterval(() => { | |
this.props.getNewMessages(); | |
}, 500); | |
} | |
componentWillUnmount() { |
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import * as React from 'react'; | |
import { Loader } from 'path-to-loader'; | |
import { Swiper } from 'path-to-swiper'; | |
class PullToUpdate extends React.PureComponent { | |
state = { | |
translate: 0 | |
}; | |
rootNode = null; |
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import * as React from 'react'; | |
class Swiper extends React.PureComponent { | |
startPointX = 0; | |
startPointY = 0; | |
direction = null; | |
clicked = false; | |
onMoveStart = ({ event, x, y }) => { | |
const { onMoveStart } = this.props; |
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users | |
.filter(({ active }) => active) | |
.map(({ age }) => (age + 100) % 27) | |
.reduce((p, c) => c > 20 ? p.concat(c) : p, []); |
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reduce(map(filter(users, ({ active }) => active), ({ age }) => (age + 100) % 27), (p, c) => c > 20 ? p.concat(c) : p, []); |
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/** | |
* Main function | |
*/ | |
function find(collection, predicate, fromIndex) { | |
let iteratee | |
const iterable = Object(collection) | |
if (!isArrayLike(collection)) { | |
collection = keys(collection) | |
iteratee = (key) => predicate(iterable[key], key, iterable) |
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const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; | |
const timerDateReduceLodash = new Date(); | |
console.log('lodash reduce', reduce(numbers, (sum, n) => sum + n, 0)); | |
console.log('lodash time', new Date() - timerDateReduceLodash); | |
const timerDateReduceJS = new Date(); | |
console.log('native reduce', numbers.reduce((sum, n) => sum + n, 0)); | |
console.log('native time', new Date() - timerDateReduceJS); |
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const users = [ | |
{ 'user': 'barney', 'age': 36, 'active': true }, | |
{ 'user': 'fred', 'age': 40, 'active': false }, | |
{ 'user': 'pebbles', 'age': 1, 'active': true } | |
]; | |
const timerDateFindLodash = new Date(); | |
console.log('lodash find', find(users, ({ age }) => age < 40)); | |
console.log('lodash time', new Date() - timerDateFindLodash); |
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// stop observing | |
observer.disconnect(); | |
// empties observer instance and returns records | |
observer.takeRecords(); // -> MutationRecords |
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// target element that we will observe | |
const target = document.querySelector('div'); | |
// config object | |
const config = { | |
characterData: true, | |
characterDataOldValue: true, | |
childList: true, | |
subtree: true | |
}; |