itsmylife

• Install iTerm2 from https://www.iterm2.com/
• Install oh-my-zsh from https://ohmyz.sh/ or https://github.com/robbyrussell/oh-my-zsh
• Set iTerm2 theme tab theme to Dark - Preferences | Appearance | Tabs | Theme > Dark
• Install Fira Code fonts from https://github.com/tonsky/FiraCode (Clone and navigate to dstr > ttf, install all font files by double clicking)
• Install Powerline fonts from https://github.com/powerline/fonts
• Set fonts for iTerm2 - Preferences | Profiles | Text
  • Change Font to 14pt Fira code regular and Check Use Ligatures checkbox
  • Change Non ASCII Font to 14pt Fira mono and Check Use Ligatures checkbox
• Install iTerm2 snazzy theme from https://github.com/sindresorhus/iterm2-snazzy
  • Navigate to Preferences | Profiles | Color Presets > Snazzy

itsmylife

const message = bottle.fullOfSoda
  ? 'The bottle has soda!'
  : 'The bottle may not have soda :-('

// is the same as
let message
if (bottle.fullOfSoda) {
  message = 'The bottle has soda!'
} else {
  message = 'The bottle may not have soda :-('

itsmylife

const greeting = 'Hello'
const subject = 'World'
console.log(`${greeting} ${subject}!`) // Hello World!

// Yukarıdakinin aynısı:
console.log(greeting + ' ' + subject + '!')

// React ile:
function Box({className, ...props}) {
  return <div className={`box ${className}`} {...props} />

itsmylife

const a = 'hello'
const b = 42
const c = {d: [true, false]}
console.log({a, b, c})

// Yukarıdakinin aynısı:
console.log({a: a, b: b, c: c})

// React ile:
function Counter({initialCount, step}) {

itsmylife

const arr = [5, 6, 8, 4, 9]
Math.max(...arr)
// is the same as
Math.max.apply(null, arr)

const obj1 = {
  a: 'a from obj1',
  b: 'b from obj1',
  c: 'c from obj1',
  d: {

itsmylife

function promises() {
  const successfulPromise = timeout(100).then(result => `success: ${result}`)

  const failingPromise = timeout(200, true).then(null, error =>
    Promise.reject(`failure: ${error}`),
  )

  const recoveredPromise = timeout(300, true).then(null, error =>
    Promise.resolve(`failed and recovered: ${error}`),
  )

itsmylife

// add(1)
// add(1, 2)
function add(a, b = 0) {
  return a + b
}

// is the same as
const add = (a, b = 0) => a + b

// is the same as

itsmylife

export default function add(a, b) {
  return a + b
}

/*
 * import add from './add'
 * console.assert(add(3, 2) === 5)
 */

export const foo = 'bar'

itsmylife

function nestedArrayAndObject() {
  // refactor this to a single line of destructuring...
  const info = {
    title: 'Once Upon a Time',
    protagonist: {
      name: 'Emma Swan',
      enemies: [
        {name: 'Regina Mills', title: 'Evil Queen'},
        {name: 'Cora Mills', title: 'Queen of Hearts'},
        {name: 'Peter Pan', title: `The boy who wouldn't grow up`},

itsmylife

// const obj = {x: 3.6, y: 7.8}
// makeCalculation(obj)

function makeCalculation({x, y: d, z = 4}) {
  return Math.floor((x + d + z) / 3)
}

// Yukarıdakinin aynısı:
function makeCalculation(obj) {
  const {x, y: d, z = 4} = obj