5.object-literals.js

//example a
function createBookShop(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 inventory = [
    { title: 'Harry Potter', price: 10 },
    { title: 'Eloquent Javascript', price: 15 }
];

const bookShop = createBookShop(inventory);

console.log(bookShop.inventoryValue());

console.log(bookShop.priceForTitle('Harry Potter'));

//example b
function saveFile(url, data) {
    $.ajax({
        url,
        data,
        method: 'POST'
    }); //jquery request plx
}

const url = 'http://fileupload.com';
const data = { color: 'red' };

saveFile(url, data);

//examples

//a
const red = '#ff0000';
const blue = '#0000ff';

const COLORS = { red, blue };

//b
const fields = ['firstName', 'lastName', 'phoneNumber'];

const props = { fields };

//c
const canvasDimensions = function (width, initialHeight) {
    const height = initialHeight * 9 / 16;
    return {
        width,
        height
    };
}    

//d
const color = 'red';

const Car = {
  color,
  drive() {
    return 'Vroom!';
  },
  getColor() {
    return this.color;
  }
};