NguyenTungs

// npm install elasticsearch
// setup nodejs client for elasticsearch
// documentation: https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/index.html
var elasticsearch = require('elasticsearch');
var EsClient = new elasticsearch.Client({
  host: 'localhost:9200',
  log: 'info'
});

NguyenTungs

// array utils
// =================================================================================================

const combine = (...arrays) => [].concat(...arrays);

const compact = arr => arr.filter(Boolean);

const contains = (() => Array.prototype.includes
  ? (arr, value) => arr.includes(value)
  : (arr, value) => arr.some(el => el === value)

NguyenTungs

let regex;

/* matching a specific string */
regex = /hello/; // looks for the string between the forward slashes (case-sensitive)... matches "hello", "hello123", "123hello123", "123hello"; doesn't match for "hell0", "Hello" 
regex = /hello/i; // looks for the string between the forward slashes (case-insensitive)... matches "hello", "HelLo", "123HelLO"
regex = /hello/g; // looks for multiple occurrences of string between the forward slashes...

/* wildcards */
regex = /h.llo/; // the "." matches any one character other than a new line character... matches "hello", "hallo" but not "h\nllo"
regex = /h.*llo/; // the "*" matches any character(s) zero or more times... matches "hello", "heeeeeello", "hllo", "hwarwareallo"

NguyenTungs

// Date Object CheatSheet
// The Date object is used to work with dates and times.
// More: http://www.w3schools.com/jsref/jsref_obj_date.asp


// 1. Instantiating a Date.


var date = new Date();
var date = new Date(milliseconds);