JS 输出有 \"strings\"\\n\"strings\" 而不是实际创建一个新行 - Coursera little lemon receipt maker答案

【问题标题】：JS output has "strings"\n"strings" instead of actually creating a new line - Coursera little lemon receipt makerJS 输出有 \"strings\"\\n\"strings\" 而不是实际创建一个新行 - Coursera little lemon receipt maker
【发布时间】：2023-02-24 03:59:08
【问题描述】：

我正在参加 JavaScript 中的 Coursera 课程的实验室测验。

目前，我没有通过这个测验，即使我在 chrome 控制台输出并且 node.js 满足要求。请帮忙！

// Given variables
const dishData = [
    {
        name: "Italian pasta",
        price: 9.55
    },
    {
        name: "Rice with veggies",
        price: 8.65
    },
    {
        name: "Chicken with potatoes",
        price: 15.55
    },
    {
        name: "Vegetarian Pizza",
        price: 6.45
    },
]
const tax = 1.20;

// Implement getPrices()
function getPrices(taxBoolean) {
    for(let i = 0; i < dishData.length; i++){
        let finalPrice
        if(taxBoolean === true){
            finalPrice = dishData[i]['price'] * tax
        } else if(taxBoolean === false){
            finalPrice = dishData[i]['price']
        } else {
            console.log("You need to pass a boolean to the getPrices call!")
            return
        }
        console.log("Dish: " + dishData[i]['name'] + "Price: $" + finalPrice)
    }
}

// Implement getDiscount()
function getDiscount(taxBoolean, guests) {
    getPrices(taxBoolean)
    if (typeof guests == "number" && guests > 0 && guests < 30){
        let discount = 0
        if(guests < 5){
            discount = 5
        } else {
            discount = 10
        }
        console.log('Discount is: $' + discount)
    } else {
        console.log('The second argument must be a number between 0 and 30')
    }
}
// Call getDiscount()

当我提交这个时，结果是：

但是当我在节点中运行相同的代码时，输出是：

为什么我的输出中有“\n”？我怎样才能让它输出预期的输出？

【问题讨论】：

也许它想要在名称和价格之间留一个空格？ dishData[i]['name'] + " Price: $"
.....你是对的......我怎么会错过这个

标签： javascript node.js

【解决方案1】：

更改此行：

console.log("Dish: " + dishData[i]['name'] + "Price: $" + finalPrice)

对此：

console.log("Dish: " + dishData[i]['name'] + " Price: $" + finalPrice)

现在您可以提交该代码

// Given variables
const dishData = [
    {
        name: "Italian pasta",
        price: 9.55
    },
    {
        name: "Rice with veggies",
        price: 8.65
    },
    {
        name: "Chicken with potatoes",
        price: 15.55
    },
    {
        name: "Vegetarian Pizza",
        price: 6.45
    },
]
const tax = 1.20;

// Implement getPrices()
function getPrices(taxBoolean) {
    for(let i = 0; i < dishData.length; i++){
        let finalPrice
        if(taxBoolean === true){
            finalPrice = dishData[i]['price'] * tax
        } else if(taxBoolean === false){
            finalPrice = dishData[i]['price']
        } else {
            console.log("You need to pass a boolean to the getPrices call!")
            return
        }
        console.log("Dish: " + dishData[i]['name'] +" Price: $" + finalPrice)
    }
}

// Implement getDiscount()
function getDiscount(taxBoolean, guests) {
    getPrices(taxBoolean)
    if (typeof guests == "number" && guests > 0 && guests < 30){
        let discount = 0
        if(guests < 5){
            discount = 5
        } else {
            discount = 10
        }
        console.log('Discount is: $' + discount)
    } else {
        console.log('The second argument must be a number between 0 and 30')
    }
}

【讨论】：

【解决方案2】：

console.log("菜肴：" + dishData[i]['name'] + "价格：$" + finalPrice)

将上面的行更改为此，它会成功的

控制台日志（"Dish: "${dishData[i]['name']}，"Price: $" ${finalPrice}）

【讨论】：

正如目前所写，您的答案尚不清楚。请edit 添加更多详细信息，以帮助其他人了解这如何解决所提出的问题。你可以找到更多关于如何写出好的答案的信息in the help center。

【解决方案3】：

// Given variables
const dishData = [
  {
    name: 'Italian pasta',
    price: 9.55,
  },
  {
    name: 'Rice with veggies',
    price: 8.65,
  },
  {
    name: 'Chicken with potatoes',
    price: 15.55,
  },
  {
    name: 'Vegetarian Pizza',
    price: 6.45,
  },
];
const tax = 1.2;

// Implement getPrices()
function getPrices(taxBoolean) {
  for (let i = 0; i < dishData.length; i++) {
    let finalPrice;
    if (taxBoolean === true) {
      finalPrice = dishData[i].price * tax;
      console.log(`Dish: ${dishData[i].name} Price: $${finalPrice}`);
    } else if (taxBoolean === false) {
      finalPrice = dishData[i].price;
      console.log(`Dish: ${dishData[i].name} Price: $${finalPrice}`);
    } else {
      console.log('You need to pass a boolean to the getPrices call!');
      return;
    }
  }
}

// Implement getDiscount()
function getDiscount(taxBoolean, guests) {
  getPrices(taxBoolean);
  if (!isNaN(guests) && guests > 0 && guests < 30) {
    let discount = 0;
    if (guests < 5) {
      discount = 5;
    } else if (guests >= 5) {
      discount = 10;
    } else {
      console.log(`${guests} is not a number!`);
    }
    console.log(`Discount is: $${discount}`);
  } else {
    console.log(`The second argument must be a number between 0 and 30`);
  }
}

// Call getDiscount()
getDiscount(true, 6);

【讨论】：

经过测试的代码，在 coursera 上的评分为 100%。