Declarative Arrays: Naming Callback Parameters

callback-parameters.js

const cart = [
	{
		name: 'Waterloo Sparkling Water',
		quantity: 4,
		price: 1,
	},
	{
		name: 'High Brew Coffee',
		quantity: 2,
		price: 2,
	},
];

const toTotal = (totalPrice, {quantity, price}) => 
	totalPrice + quantity * price;

const total = cart.reduce(toTotal, 0);
console.log(total); // 8