0xD34F

setTimeout(function() {
  console.log(this.resorts.join(', '));
}.bind(this), delay);

var that = this;
setTimeout(function() {
  console.log(that.resorts.join(', '));
}, delay);

<button data-block="block-one">69</button>
<button data-block="block-two">187</button>
<button data-block="block-three">666</button>

<div class="block block-one">hello, world!!</div>
<div class="block block-two">fuck the world</div>
<div class="block block-three">fuck everything</div>

$('body').on('click', 'button', function() {
  const $block = $(`.${this.dataset.block}`).toggleClass('show');
  $('.block').not($block).removeClass('show');
});

// или

document.addEventListener('click', ({ target: { dataset: { block } } }) => {
  if (block) {
    document.querySelectorAll('.block').forEach(({ classList: cl }) => {
      cl[cl.contains(block) ? 'toggle' : 'remove']('show');
    });
  }
});

<button class="button">69</button>
<button class="button">187</button>
<button class="button">666</button>

<div class="block block-one">hello, world!!</div>
<div class="block block-two">fuck the world</div>
<div class="block block-three">fuck everything</div>

const $blocks = $('.block');
const $buttons = $('.button').click(function() {
  const $block = $blocks.eq($buttons.index(this)).toggleClass('show');
  $blocks.not($block).removeClass('show');
});

// или

const blocks = document.querySelectorAll('.block');
const buttons = document.querySelectorAll('.button');

buttons.forEach(n => n.addEventListener('click', onClick));

function onClick() {
  const index = Array.prototype.indexOf.call(buttons, this);
  blocks.forEach((n, i) => n.classList[i === index ? 'toggle' : 'remove']('show'));
}

html += '<li onclick="location.href=\'' + product.url + '\'">';

html += `<li onclick="location.href='${product.url}'">`;

fs.open(fname, 'a', (err, file_handle) => {
  if (!err)
    this.file_handle = file_handle;

$('#given1').on('change', 'select', function(){
  addNewSelect();
});

const termParts = term.trim().toLowerCase().split(/\s+/);

if (termParts.every(n => data[i][0].toLowerCase().includes(n))) {

validate = true;
if (/* проверка введённых данных */) {
  validate = false;
}

arr.sort(({ date: a }, { date: b }) => !a ? 1 : !b ? -1 : a - b);
// или
arr.sort((a, b) => (a.date || Infinity) - (b.date || Infinity));

const sortedArr = arr
  .map(n => [ n, n.hasOwnProperty('date') ? n.date : Infinity ])
  .sort((a, b) => a[1] - b[1])
  .map(n => n[0]);

function toggleWithInterval(selector, delay) {
  let index = -1;

  return setInterval(function($items) {
    $items.eq(index).hide();
    index = (index + 1) % $items.length;
    $items.eq(index).show();
  }, delay, $(selector).hide());
}

toggleWithInterval('.container1 > .good', 1000);
toggleWithInterval('.container2 > .good', 300);

document.querySelectorAll('li').forEach((n, i) => {
  n.addEventListener('click', e => {
    console.log(i);
  });
});

const onClick = e => console.log(e.target.dataset.index);
const li = document.getElementsByTagName('li');

for (let i = 0; i < li.length; i++) {
  li[i].dataset.index = i;
  li[i].addEventListener('click', onClick);
}

document.querySelector('ul').addEventListener('click', e => {
  if (e.target.tagName === 'LI') {
    const i = [...e.currentTarget.children].indexOf(e.target);
    console.log(i);
  }
});

elem.style.opacity += 0.02;

elem.style.opacity = (+elem.style.opacity + 0.02).toFixed(2);

const $q = $('.trigger .q').click(function() {
  $q.not(this).next().slideUp();
  $(this).next().slideToggle();
});

const obj = Object.assign({}, ...arr.map((n, i) => ({ [n]: arr2[i] })));
// или
const obj = arr.reduce((acc, n, i) => ({ ...acc, [n]: arr2[i] }), {});

const combine = (keys, values) =>
  keys.reduce((acc, n, i) => (acc[n] = values[i], acc), {});


const obj = combine(arr, arr2);

$(document).on('click', '.ev-title', function() {
  $(this).closest('.wrapper').find('.dop-descr').toggleClass('visible');
});

const containerSelector = '.wrapper';
const buttonSelector = '.ev-title';
const activeClass = 'active';

$(containerSelector).on('click', buttonSelector, e => {
  $(e.delegateTarget).toggleClass(activeClass);
});

document
  .querySelectorAll(`${containerSelector} ${buttonSelector}`)
  .forEach(n => n.addEventListener('click', onClick));

function onClick() {
  this.closest(containerSelector).classList.toggle(activeClass);
}

больше не появлялось пока он не почистит куки

const spinWords = str => str
  .split(' ')
  .map(n => n.length > 4 ? [...n].reverse().join('') : n)
  .join(' ');

function spinWords(str) {
  return str.replace(/\S{5,}/g, m => ''.concat(...Array.from(m).reverse()));
}

const result = Object
  .entries(Object.assign({}, ...arr1, ...arr2))
  .map(n => ({ [n[0]]: n[1] }));

const union = (key, ...arrs) =>
  Object.values([].concat(...arrs).reduce((acc, n) => (acc[key(n)] = n, acc), {}));


const result = union(el => Object.keys(el)[0], arr1, arr2);

const result = _.unionBy(arr1, arr2, el => _.keys(el)[0]);