对象 javascript 中的未定义布尔值

Question

我尝试了以下任务，但我坚持定义一个布尔值：

定义一个函数

getWalletFacts

接收钱包，一个对象。

getWalletFacts

应该返回一个句子，说明钱包的颜色和 现金状态。

我尝试的代码

const hascash = Boolean();

let wallet ={
    color:"",
    hascash:true||false,
    write: function(sentence){
        console.log(sentence);
    }
};
function getWalletFacts(wallet){
    let sentence= "my wallet is " + wallet.color+ " and  " + wallet.hascash; 
    return sentence;
}

每当我检查我的答案时，它都会告诉我 hascash 是未定义的，即

    Expected: "My wallet is Black and has cash"
        Received: "my wallet is Black and  undefined"

根据我对问题的理解，hascash 接受一个布尔值

举个例子

const wallet = {
    color: "Black",
    hasCash: true
};

getWalletFacts(wallet); // => 'My wallet is Black and has cash'

const wallet2 = {
    color: "Grey",
    hasCash: false
};

getWalletFacts(wallet2); // => 'My wallet is Grey and does not have cash'

Answer 1

是

hasCash

，不是

hascash

——JavaScript区分大小写。

您还需要一个条件来将

true/false

值转换为正确的英语。

function getWalletFacts(wallet) {
  let sentence = "my wallet is " + wallet.color + " and " + (wallet.hasCash ? "has cash" : "does not have cash");
  return sentence;
}

const wallet = {
    color: "Black",
    hasCash: true
};

console.log(getWalletFacts(wallet)); // => 'My wallet is Black and has cash'

const wallet2 = {
    color: "Grey",
    hasCash: false
};

console.log(getWalletFacts(wallet2)); // => 'My wallet is Grey and does not have cash'

Answer 2

function getWalletFacts(wallet) {
let money = " ";
if (wallet.hasCash === true) {
    money = "has cash";
}   else {
    money = "does not have cash";
}
let sentence = "My wallet is " + wallet.color + " and " + money;
return sentence;

}