JS Bin// source http://jsbin.com/diqumox

jsbin.diqumox.js

/* Enhanced Object Literals */
const inventory = [
  { title: 'Harry Potter', price: 10 },
  { title: 'Eloquent Javascript', price: 15 }
];

// Object Literals the ES5 way example #1
function createBookshopES5(inventory) {
  return {
    inventory: inventory,
    inventoryValue: function() {
      return this.inventory.reduce((total, book) => total + book.price, 0);
    },
    priceForTitle: function(title) {
      return this.inventory.find(book => book.title === title).price;
    }
  };
}

const bookShopES5 = createBookshopES5(inventory);

const totalInventoryES5 = bookShopES5.inventoryValue();
console.log(totalInventoryES5);
const bookPriceES5 = bookShopES5.priceForTitle("Harry Potter");
console.log(bookPriceES5);

// Object Literals the ES6 way example #1
function createBookshopES6(inventory) {
  return {
    inventory,
    inventoryValue() {
      return this.inventory.reduce((total, book) => total + book.price, 0);
    },
    priceForTitle(title) {
      return this.inventory.find(book => book.title === title).price;
    }
  };
}

const bookShopES6 = createBookshopES6(inventory);

const totalInventoryES6 = bookShopES6.inventoryValue();
console.log(totalInventoryES6);
const bookPriceES6 = bookShopES6.priceForTitle("Harry Potter");
console.log(bookPriceES6);

// Object Literals the ES5 way example #2
const url = "http://fileupload.com";
const data = { color: 'red' };
function saveFileES5() {
  $.ajax({ method: 'POST', url: url, data: data });
}
const newFileES5 = saveFileES5(url, data);
console.log(newFileES5);

// Object Literals the ES6 way example #2
function saveFileES6() {
  $.ajax({ url, data, method: 'POST'});
}
const newFileES6 = saveFileES6(url, data);
console.log(newFileES6);