larryyangsen

const group = (arr = [], length = 2) => {
    if (length > arr.length) return;
    const newArr = arr.slice();
    const returnArr = [];
    while (newArr.length > length) {
        const values = newArr.splice(0, length);
        returnArr.push(values);
    }
    returnArr.push(newArr);
    return returnArr;

larryyangsen

const compose = (...fns) => arg =>
    fns.reduce((composed, fn) => fn(composed), arg);

const toUpper = str => str.toUpperCase();
const splitWithSign = sign=>str=>str.split(sign);
const newStrs = compose(toUpper,splitWithSign('|'))('a|bc');
console.log(newStrs)

larryyangsen

import elasticsearch from 'elasticsearch';
import config from '../config';
import proxy from 'proxy-agent';

const client = new elasticsearch.Client({
  host: 'my.host.com',
  createNodeAgent: () => proxy("http://localhost:8888")
});

larryyangsen

(async () => {
    const arrs = [1, 2, 1, 5, 6, 4, 8, 9, 10, 15];
    for (let i = 0; i < 4; i++) {
        const delays = arrs
            .splice(0, 3)
            .map(
                delay =>
                    new Promise(resolve =>
                        setTimeout(() => resolve(delay), delay * 1000)
                    )

larryyangsen

const split = (sign = '/') => (str = '') => {
    if (!str.includes(sign)) return str.trim();
    const arr = str.split(' ');
    const signIndex = arr.findIndex(a => a.includes(sign));
    const scrapeStr = arr.slice(0, signIndex).join(' ');
    const splits = arr[signIndex].split(sign);
    const sliced = arr.slice(signIndex + 1).join(' ');
    const strs = [];
    for (const s of splits) {
        s && strs.push(split(sign)(`${scrapeStr} ${s} ${sliced}`));

larryyangsen

const puppeteer = require('puppeteer');
(async () => {
    const browser = await puppeteer.launch({ headless: false });
    const page = await browser.newPage();
    const prePageSelector = '.btn-group-paging a:nth-child(2)@href';
    const listSelector = '.r-ent';
    const titleSelector = '.title a';
    const titleLinkSelector = '.title a@href';
    const authorSelector = '.meta .author';
    const dateSelector = '.meta .date';

larryyangsen

  const options= {
      index:'index1',
      scroll: '2m',
      type:'test',
      allowNoIndices: true,
      ignoreUnavailable: true,
      body: {
         size: 100,
         from: 0
      }

larryyangsen

const arrToObj=([key,value])=>({[key]:value});

console.log(arrToObj(['aa','aa'])); //{aa:'aa'}