返回 function Javascript 中的值

Question

我正在尝试检查“candyName”是否等于库存的糖果，然后将糖果的“inStock”与其“weeklyAverage”进行比较，然后根据“inStock”大于或小于“weeklyAverage”返回真或假”。 它不断出现未定义（而不是真或假）。 我究竟做错了什么？

let inventory = [
  { candy: "Twizzlers", inStock: 180, weeklyAverage: 200 },
  { candy: "Sour Patch Kids", inStock: 90, weeklyAverage: 100 },
  { candy: "Milk Duds", inStock: 300, weeklyAverage: 170 },
  { candy: "Now and Laters", inStock: 150, weeklyAverage: 40 }
];

function orderCandy(stock, average) {
  if (stock < average) {
    return true;
  }
  else {
    return false;
  }
}

function checkCandy(candy, inputCandy) {
  if (candy === inputCandy) {
    let inStock = candy.inStock;
    let weeklyAverage = candy.weeklyAverage;
    return orderCandy(inStock, weeklyAverage);
  }
}

function shouldWeOrderThisCandy (inventory, candyName) {
  let order;
  for (let i = 0; i < inventory.length; i++) {
    let selectedCandy =  inventory[i];
    return checkCandy(selectedCandy.name, candyName);
  }
}

shouldWeOrderThisCandy (inventory, "Milk Duds");

Answer 1

这是您期望的代码，您的 if 测试在错误的位置

 let inventory = [
  { candy: "Twizzlers", inStock: 180, weeklyAverage: 200 },
  { candy: "Sour Patch Kids", inStock: 90, weeklyAverage: 100 },
  { candy: "Milk Duds", inStock: 300, weeklyAverage: 170 },
  { candy: "Now and Laters", inStock: 150, weeklyAverage: 40 }
];

function orderCandy(stock, average) {
  if (stock < average) {
    return true;
  }
  else {
    return false;
  }
}

function checkCandy(candy, inputCandy) {
    let inStock = candy.inStock;
    let weeklyAverage = candy.weeklyAverage;
    return orderCandy(inStock, weeklyAverage);
}

function shouldWeOrderThisCandy (inventory, candyName) {
  let order;
  for (let i = 0; i < inventory.length; i++) {
    let selectedCandy =  inventory[i];
    if (selectedCandy.candy==candyName) {
    return checkCandy(selectedCandy, candyName);
    }
  }
}

shouldWeOrderThisCandy (inventory, "Milk Duds");

如果它按您的计划工作，请接受答案，因为我认为您无法投票