Fouzyyyy

var obj = {foo: 'foo', bar: 'bar'};

function func() {
  // IIFE!
  (() => {
    console.log(this);
  })();
}

let boundFunc = func.bind(obj);

Fouzyyyy

// Before

let multiplyByItself = (number) => {
  return number * number;
};

// After

let multiplyByItself = number => number * number;

Fouzyyyy

let multiplyByItself = number => number * number;

alert(multiplyByItself(2)); // 4

Fouzyyyy

// The number parameter does not need to be surrounded by parentheses
let multiplyByItself = number => { 
  return number * number;
};

alert(multiplyByItself(2)); // 4

Fouzyyyy

// The simplest way
let multiplyByItself = (number) => {
  return number * number;
};

alert(multiplyByItself(2)); // 4

Fouzyyyy

function executeThis(callableParameter) {
  callableParameter();
  
  alert('We are done here :)');
}

executeThis(() => {
  alert('Hi there! I am an arrow function passed as an argument, ihaaaaaaa!');
});

Fouzyyyy

// At the time of this writing, 1 US dollar = 0.85 Euro

const euro = 0.85;

let dollarsToEuros = (dollars) => {
  if (dollars == 0) {
    return 0;
  } else {
      return dollars * euro;
  }

Fouzyyyy

// We can do this
let bar = (arg) => {
    console.log('hi ' + arg + ', nice to meet you!');
};

// But we can't do that!
function bar(arg) => {
  console.log('hi ' + arg + ', nice to meet you!');
}

Fouzyyyy

function foo(arg) {
    console.log('hi ' + arg + ', nice to meet you!');
}

// VS

let bar = (arg) => {
    console.log('hi ' + arg + ', nice to meet you!');
};