在Codecademy上使用JavaScript控制流编程

Question

该程序将给出三种路线选择，然后询问有关装备，鞋子和宠物的信息。 选择全部之后，我使用switch()语句根据用户的选择给出相应的答案。

问题在于，响应始终是我对if()条件的响应，这意味着如果条件不满足，它将仍然记录相同的响应。

这是Code Academy的练习； 该网站说我已经满足了该程序的要求，但是当然，由于结果不正确，我想寻求帮助。 感谢所有提前提供帮助的人。 :)

var user = prompt("Your path diverges to three roads, which one will you take?", "Forest, Mountain or Sea?").toUpperCase();
var gear = ["Oxygen tank", "Fire Starter", "Camp"]
var askGear = prompt("Choose your gear:", gear[0] + ", " + gear[1] + " or " + gear[2]).toUpperCase();
var shoes = ["Swimfin", "Studded", "BearPaw"]
var askShoes = prompt("Choose your shoes:", shoes[0] + ", " + shoes[1] + " or " + shoes[2]).toUpperCase();
var pet = ["Monkey", "Wolf", "Whale"]
var askPet = prompt("Choose your pet:", pet[0] + ", " + pet[1] + " or " + pet[2]).toUpperCase();
var choiceBank = [askGear, askShoes, askPet]
var choices = confirm("You chose to take " + askShoes + " shoes, " + askGear + " and a " + askPet + " to your adventure in the " + user + ". Are you ready to go?")
var choiceConfirm = confirm("This is your final chance, you sure?")

switch(user) {
    case "FOREST": {
        if (choiceBank[0] = 'CAMP' || 'FIRE STARTER', choiceBank[1] = 'BEARPAW', choiceBank[2] = 'WOLF' || 'MONKEY') {
            console.log("Congratulations! With those right supplies you chose, you survived to live another day!")
        } else {
            console.log("Really? You though you could survive with those supplies?")
        }
    }
        break;
    case "MOUNTAIN": {
        if (choiceBank[0] = 'CAMP' || 'FIRE STARTER', choiceBank[1] = 'STUDDED', choiceBank[2] = 'WOLF') {
            console.log("Wow! You're a survival expert!")
        } else {
            console.log("Really? You though you could survive with those supplies?")
        }   
    } 
        break;
    case "SEA": {
        if (choiceBank[0] = 'OXYGEN TANK', choiceBank[1] = 'SWIMFIN', choiceBank[2] = 'WHALE') {
            console.log("Congratulations on choosing well, you survived to live another day!")
        } else {
            console.log("Really? You though you could survive with those supplies?")
        } 
    }
        break;
    default: {
        console.log("Sorry, one of the responses was invalid, please try again.")
        }
}

Answer 1

发生了什么变化：

• var块，现在紧凑，带有,分隔
• 语句用;分开;
• case块不需要多余的{}
• if更改为更有意义的话。

原始码

if (choiceBank[0] = 'CAMP' || 'FIRE STARTER',
    choiceBank[1] = 'BEARPAW', 
    choiceBank[2] = 'WOLF' || 'MONKEY') {
//                ^        ^ ^
//       assignment        or and comma

变成

if ((choiceBank[0] === 'CAMP' || choiceBank[0] === 'FIRE STARTER') &&
    choiceBank[1] === 'BEARPAW' &&
    (choiceBank[2] === 'WOLF' || choiceBank[2] === 'MONKEY')) {

choiceBank[0] = 'CAMP'是一个赋值，但我们需要与choiceBank[0] === 'CAMP'进行比较，并与'FIRE STARTER' 。 这应该是'CAMP'选择的替代方法。 这可以通过逻辑或 || 。 , 和替换为&& 。 并且当或的优先级小于和时 ，需要括号。

• 较小的更改：添加为输出而不是console.log

 var user = prompt("Your path diverges to three roads, which one will you take?", "Forest, Mountain or Sea?").toUpperCase(), gear = ["Oxygen tank", "Fire Starter", "Camp"], askGear = prompt("Choose your gear:", gear[0] + ", " + gear[1] + " or " + gear[2]).toUpperCase(), shoes = ["Swimfin", "Studded", "BearPaw"], askShoes = prompt("Choose your shoes:", shoes[0] + ", " + shoes[1] + " or " + shoes[2]).toUpperCase(), pet = ["Monkey", "Wolf", "Whale"], askPet = prompt("Choose your pet:", pet[0] + ", " + pet[1] + " or " + pet[2]).toUpperCase(), choiceBank = [askGear, askShoes, askPet], choices = confirm("You chose to take " + askShoes + " shoes, " + askGear + " and a " + askPet + " to your adventure in the " + user + ". Are you ready to go?"), choiceConfirm = confirm("This is your final chance, you sure?"); switch (user) { case "FOREST": if ((choiceBank[0] === 'CAMP' || choiceBank[0] === 'FIRE STARTER') && choiceBank[1] === 'BEARPAW' && (choiceBank[2] === 'WOLF' || choiceBank[2] === 'MONKEY')) { out("Congratulations! With those right supplies you chose, you survived to live another day!"); } else { out("Really? You though you could survive with those supplies?"); } break; case "MOUNTAIN": if ((choiceBank[0] === 'CAMP' || choiceBank[0] === 'FIRE STARTER') && choiceBank[1] === 'STUDDED' && choiceBank[2] === 'WOLF') { out("Wow! You're a survival expert!"); } else { out("Really? You though you could survive with those supplies?"); } break; case "SEA": if (choiceBank[0] === 'OXYGEN TANK' && choiceBank[1] === 'SWIMFIN' && choiceBank[2] === 'WHALE') { out("Congratulations on choosing well, you survived to live another day!"); } else { out("Really? You though you could survive with those supplies?"); } break; default: out("Sorry, one of the responses was invalid, please try again."); } function out(s) { var node = document.createElement('div'); node.innerHTML = s + '<br>'; document.getElementById('out').appendChild(node); } 

 <div id="out"></div>