Javascript -使用map重构(if语句、意大利面条代码)

const numbers = [1, 2, 3, 4, 5];

const isEven = (number) => {
  if (number % 2 === 0) {
    return true;
  } else {
    return false;
  }
};

const evenNumbers = numbers.map(isEven);
console.log(evenNumbers); // 输出 [false, true, false, true, false]

const orders = [
  { id: 1, product: 'Apple', quantity: 2 },
  { id: 2, product: 'Banana', quantity: 3 },
  { id: 3, product: 'Orange', quantity: 1 }
];

const calculateTotalPrice = (order) => {
  const priceMap = {
    'Apple': 1,
    'Banana': 2,
    'Orange': 3
  };
  
  const totalPrice = order.quantity * priceMap[order.product];
  return totalPrice;
};

const totalPrices = orders.map(calculateTotalPrice);
console.log(totalPrices); // 输出 [2, 6, 3]