Hey guys I hope someone can help me. I've got array of objects
const users = [
{
id: "2222",
name: "Peter",
age: 20,
carts: [
{
productId: "1a3va",
price: 3.44,
quantity: 3,
},
{
productId: "3adf4",
price: 8.44,
quantity: 5,
},
],
},
{
id: "43443",
name: "John",
age: 24,
carts: [
{
productId: "2334a",
price: 13.44,
quantity: 13,
},
{
productId: "4234d",
price: 1.44,
quantity: 1,
},
],
},
];
Then my task is for function invoiceCustomer -> return the total value of items in the cart, for a given customer with suggested parameters. And for totalOrderValue it should return the total value of the order.
function invoiceCustomer(users, id, name, age) {}
function totalOrderValue(order) {}
I have experimented with map and reduce but getting NaN error even if I use parseInt.
I hope that someone can help me with this. Thanks!
I think this should work.
function totalOrderValue(users, id, name, age) {
let user = users.filter( (item, index, array) => {
// Used only one criteria (id) for example simplicity
return item.id === id;
});
if (user.length === 1) {
return user[0].carts.reduce((prevValue, item) => {
return prevValue + (item.price * item.quantity);
}, 0); // Important: initialize prevValue to 0
} else if (user.length === 0) {
throw 'User not found';
} else {
throw 'Too many users found';
}
}
I can't help you with the totalOrderValue function cause there's no orderId to filter the data, but you get the point of using filter and reduce methods.