class Product{
    // required fields
    
	public $id;           // product id
	public $price;        // product unit price
      
    // add optional product fields
      public $name;
}
    
$shirt = new Product();
$trousers = new Product();

//  Set the id and unit price

$shirt->id = 1;
$shirt->price = 5.0;

$trousers->id = 5;
$trousers->price = 10.0;

    function Product(){
    // required fields
    
	this.id;            // product id
	this.price;         // product unit price
	
    // add optional fields
  }

var shirt = new Product();
var trousers = new Product();

//  Set the id and unit price

shirt.id = 1;
shirt.price = 5.0;

trousers.id = 5;
trousers.price = 10.0;

 // add 2 shirts to cart
 Cart::getInstance()->add($shirt,2);

   // add 2 shirts to cart
  Cart.getInstance().add(shirt, 2);

Cart::getInstance()->all();

Cart.getInstance().all();

// reduce shirt by 1
Cart::getInstance()->reduce($shirt,1);

// reduce shirt by 1
Cart.getInstance().reduce(shirt, 1);

Cart::getInstance()->get($shirt);

Cart.getInstance().get(shirt);

Cart::getInstance()->getTotalQty();

Cart.getInstance().getTotalQty();

Cart::getInstance()->getTotalPrice();

Cart.getInstance().getTotalPrice();

Cart::getInstance()->getSubQty($shirt);

Cart.getInstance().getSubQty(shirt);

Cart::getInstance()->getSubPrice($shirt);

Cart.getInstance().getSubPrice(shirt);

Cart::getInstance()->remove($shirt)

 Cart.getInstance().remove(trousers)

\\ clear shirt quantity and set it to 3
Cart::getInstance()->update($shirt,3)

\\ clear shirt quantity and set it to 3
Cart.getInstance().update(shirt,3);

Cart::getInstance()->clear()

Cart.getInstance().clear()

Cart::getInstance()->getLastItem()

Cart::getInstance()->getFirstItem()