agatablue

function Cat(name) {
  this.name = name;
}
Cat.prototype.getVoice = function() {
    console.log("Miau miau");
};
Cat.prototype.catFeet = 4;

var numberOfCats = 1000000;
var arrayOfCats = [];

agatablue

function Cat(name) {
  this.name = name;
  this.catFeet = 4;
  this.getVoice = function() {
    console.log("Miau miau");
  };
}
var numberOfCats = 1000000;
var arrayOfCats = [];

agatablue

function New(func) {
    //1. create empty object
    var res = {}; 

    //2. set his [[Prototype]] (aka __proto__) to function property prototype
    res.__proto__ = func.prototype;

    //3. It makes the this variable point to the newly created object
    func.call(res);

agatablue

function Cat(name) {
  this.name = name;
  this.catFeet = 4;
  this.getVoice = function() {
    console.log("Miau miau");
  };
}
var filemon = new Cat("Filemon");
var mruczek = new Cat("Mruczek");

agatablue

var cat = {
    getVoice: function() {
       console.log("Miau miau");
   }
};

cat.getVoice(); // Miau miau

agatablue

var A = { name: "a" };
var B = { dev: true};

//var C = Object.assign(A,B);
// taki zapis podmieni nam obiekt A
//dlatego, że pierwszy argument to źródło kopiowania wszystkich innych

//zatem zróbmy tak:
var C = Object.assign({}, A,B); // Obiekt C wygląda tak: {name: "a", dev: true}

agatablue

const alien = {
  sayHello () {
    return `Hello, my name is ${ this.name }`;
  }
};

const clark = Object.assign( 
    {}, 
    alien, 
    {name: 'Clark'}

agatablue

const alien = {
  sayHello () {
    return `Hello, my name is ${ this.name }`;
  }
};
const createAlien = (name) => { 
   return Object.assign(Object.create(alien), {
     name
  });
}

agatablue

var greenAlien = {
  sayHello: function() {
     return `Hello, my name is ${ this.name }`
  } 
}
var redAlien = Object.create(greenAlien);

redAlien.fly = function() {
    console.log('I can fly'); 
}

agatablue

  var A = {};
  var B = Object.create(A);