Erushenko

var matrixExample = [
   [ 1, 2, 3, 4 ],
   [ 4, 5, 6, 5 ],
   [ 7, 8, 9, 7 ],
   [ 7, 8, 9, 7 ]
 ];

function sumUpDiagonals(matrix) {
  var sumDiagonals = {main: 0, second: 0},
    matrixLength = matrix.length;

Erushenko

const cheerio = require("cheerio")
const Promise = require("bluebird")
const request = Promise.promisify(require("request"))
const csvStringify = require('csv-stringify')
const fs = require('fs')

const URL = 'https://dou.ua/forums'
request(URL)
	.then(topics)
	.mapSeries(topic => request(topic.url).then(res => topicContents(res, topic)))

Erushenko

var connectionString = 'postgres://localhost:5432/postgres';
var Promise=require('bluebird');


var knex = require('knex')({
  client: 'pg',
  connection: {
      user: 'postgres',
      database: 'postgres',
      port: 5432,

Erushenko

var interval = window.setInterval(function() {
    var moreButton = document.querySelector('a[ajaxify*="outgoing/more"]');
    if (moreButton)
    {
        moreButton.click();
        console.log('loading more...');
    }
    else
    {
        //window.clearInterval(interval);

Erushenko

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

Erushenko

// === Arrays

var [a, b] = [1, 2];
console.log(a, b);
//=> 1 2


// Use from functions, only select from pattern
var foo = () => [1, 2, 3];

Erushenko

/* How to calculate postgreSQL database size in disk ? */

SELECT pg_size_pretty(pg_database_size('thedbname'));

/* Calculate size of a table including or excluding the index */

SELECT pg_size_pretty(pg_total_relation_size('big_table'));
SELECT pg_size_pretty(pg_relation_size('big_table')); /* without index */

/* See indexes on a table with `\d tablename` */

Erushenko

module.exports = {
	jwt: env('JWT_SECRET'),
	pg: {
		connection: `postgres://app:${env('PG_APP_PWD', 'app')}@${env('PG_HOST', 'localhost')}/db`,
		client: 'pg',
	},
	pgTwo: {
		connection: `postgres://app2:${env('PG_APP2_PWD', 'APP2')}@${env('PG_APP2_HOST', 'localhost:port')}/db2`,
		client: 'pg',
	},

Erushenko

function formatMoney(value) {
	const preparedValue =
		typeof value === 'undefined' || value === null ? '' : value.toString()

	let [dollars, cents = ''] = preparedValue.replace(/[^0-9.-]/g, '').split('.')

	dollars = dollars.replace(/^0+/, '') || '0'
	cents = `${cents}00`.slice(0, 2)

	return `${dollars}.${cents}`.replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1 ')