bpinedah

const fn = function() { return null; };
const nan = NaN;

console.log(typeof fn()); // object
console.log(typeof nan); // number :v

bpinedah

const fn = function() { return null; };
const arr = [];
const obj = {};

console.log(typeof fn); // function
console.log(typeof arr); // object
console.log(typeof obj); // object

bpinedah

const name = 'Bruce';
const age = 18;
const isDeveloper = true;

console.log(typeof name); // string
console.log(typeof age); // number
console.log(typeof isDeveloper); // boolean

bpinedah

function Person (name) {
  console.log(this); // Person {}
  this.name = name;
}

const bruce = new Person('Bruce');

console.log(bruce.__proto__); // Person {}

bpinedah

function Person(){
  this.name = 'Default';
}
const bruce = Person();

console.log(bruce.name); // TypeError: Cannot read property 'name' of undefined

bpinedah

function Person() {
  this.name = 'Default';
  this.lastname = 'Default';
}
const bruce = new Person();

console.log(bruce);

bpinedah

const fn = function(){
  // Do something
}

console.log(fn.__proto__.__proto__.__proto__); // null

bpinedah

const person = {
  name: 'Anonymous',
  lastname: 'Anonymous',
  age: 18,
  hair: true
}
const developer = {
  languages: ['Javascript', 'C#', 'Java']
}
const esteban = {

bpinedah

const developer = {
  name: 'Anonymous',
  lastname: 'Anonymous',
  fullname: function(){
    return this.name + ' ' + this.lastname;
  }
}
const bruce = {
  name: 'Bruce',
  lastname: 'Wayne'

bpinedah

const fn = function(name){
  console.log('hello ' + name);
}
const name = fn.name;
const fnCopy = fn.bind(this, 'Bruce');

fnCopy();
fn.call(this, 'Bruce');
fn.apply(this, ['Bruce']);
console.log(fn.toString());