通过嵌套数组获取价格乘以数量的总和

const orders = [
  [
    { price: 10, quantity: 2 },
    { price: 5, quantity: 3 }
  ],
  [
    { price: 20, quantity: 1 },
    { price: 15, quantity: 4 }
  ]
];

function calculateTotalPrice(orders) {
  let totalPrice = 0;
  for (const order of orders) {
    for (const item of order) {
      totalPrice += item.price * item.quantity;
    }
  }
  return totalPrice;
}

console.log(calculateTotalPrice(orders)); // 输出: 115

function calculateTotalPrice(orders) {
  let totalPrice = 0;
  for (const order of orders) {
    for (const item of order) {
      const price = typeof item.price === 'number' ? item.price : 0;
      const quantity = typeof item.quantity === 'number' ? item.quantity : 1;
      totalPrice += price * quantity;
    }
  }
  return totalPrice;
}