MD4

function retry<T>(promise: () => Promise<T>, maxTries = 3): Promise<T> {
  return promise().catch(() =>
    maxTries > 1 ? retry(promise, maxTries - 1) : promise()
  );
}

MD4

const countSelectedIssuePoints = () => $('.js-issue.ghx-selected .aui-badge.ghx-statistic-badge')
  .map((_, b) => +$(b).text())
  .get()
  .reduce(
    (a,b) => a + (b || 0),
    0,
  );

countSelectedIssuePoints(); // 3

MD4

const preFetchImageSize = (url, checkInterval = 10) => new Promise((resolve, reject) => {
  const image = new Image();

  image.src = url;
  image.onerror = reject;

  const interval = setInterval(() => {
    if (image.width + image.naturalWidth) {
      clearInterval(interval);
      resolve({

MD4

const formatToDuration = milliseconds => {
	const seconds = Math.round(milliseconds / 1000);
	const s = Math.round(seconds % 60);
	const m = (Math.floor(seconds / 60) % 60);
	const h = (Math.floor(seconds / 60 / 60) % 24);
	const d = (Math.floor(seconds / 60 / 60 / 24));

	return [
		(d ? `${d}d` : ''),
		(h ? `${h}h` : ''),

MD4

const parseHex = hexString => hexString
    .match(/.{1,2}/g)
    .map(hex => String.fromCharCode(parseInt(hex, 16)))
    .join('');

MD4

/**
 * Example:
 * observe('myProp').on(myObject);
 */

global.observe = (varName) => ({
  on: (object) => {
    let value = object[varName];
    Object.defineProperty(
      object,

MD4

const smoothScrollToTop = (element = document.body, interpolationFactor = 1.2) =>
  Math.round(element.scrollTop /= interpolationFactor) ?
    setTimeout(smoothScrollToTop, 16.666, element) && true : false;

MD4

Array.prototype.shuffle = function() {
  return this
    .reduce(
      ([result, rest]) => {
        const random = (Math.random() * rest.length) >> 0;
        return [
          result
            .concat(rest[random]),
          rest
            .slice(0, random)

MD4

'use strict';

Promise.series = promises =>
  ((results = []) =>
    promises
      .reduce(
        (promise, current) => promise
          .then(current)
          .then(function () {
            results.push(arguments);

MD4

var todo = {a: [1, 2, 3]};

console.log((todo === { ...todo, a: [...todo.a] })); // false
console.log((todo.a === { ...todo, a: [...todo.a] }.a)); // false
console.log(todo, { ...todo, a: [...todo.a] }) // {"a":[1,2,3]} {"a":[1,2,3]}

console.log([1,2,3,4].includes(1)) // true
console.log([1,2,3,4].includes(5)) // false

console.log(2 ** 8) // 256