javascript_example.js•1.41 kB
/**
* A simple shopping cart implementation for demonstration purposes
*/
function ShoppingCart() {
this.items = [];
this.total = 0;
}
ShoppingCart.prototype.addItem = function (item) {
if (!item.id || !item.name || item.price === undefined) {
console.log("Invalid item");
return false;
}
this.items.push(item);
this.calculateTotal();
return true;
};
ShoppingCart.prototype.removeItem = function (itemId) {
var initialLength = this.items.length;
this.items = this.items.filter(function (item) {
return item.id !== itemId;
});
if (this.items.length === initialLength) {
console.log("Item not found: " + itemId);
return false;
}
this.calculateTotal();
return true;
};
ShoppingCart.prototype.calculateTotal = function () {
var total = 0;
for (var i = 0; i < this.items.length; i++) {
total += this.items[i].price;
}
this.total = total;
};
ShoppingCart.prototype.checkout = function () {
if (this.items.length === 0) {
console.log("Cannot checkout an empty cart");
return false;
}
// Process payment
console.log("Processing payment for: $" + this.total);
// Clear cart
this.items = [];
this.total = 0;
return true;
};
// Example usage
var cart = new ShoppingCart();
cart.addItem({ id: 1, name: "Product 1", price: 10.99 });
cart.addItem({ id: 2, name: "Product 2", price: 5.99 });
cart.removeItem(1);
cart.checkout();