我有一个包含不同食物的数组，然后出现一个提示，您可以在其中选择其中一个，然后我想向他们展示他们在“grocery()”函数中选择的内容，但它只显示“完成”，因为这是我输入的最后一个单词，当我在提示中输入它时，是否有办法从第一个数组中取出该内容，并将其存储在一个新的数组变量中，然后显示它？我已经尽力了。
任何人都可以帮忙吗！我将不胜感激！
这是代码
function blue() {
alert("You start walking on the blue road");
alert("You spot a grocery store at the side of the road.");
alert("You decide to walk inside, and buy yourself some food.")
alert("You open the door to the store, you hear a loud bell as you opened the door.")
alert("You notice the cashier turning her head towards you.")
alert("You take a bag, and nods politely, then walks in to the store.")
alert("Here's a list of all the things available in the store.")
var inStock = ['apples', 'eggs', 'milk', 'cookies', 'cheese', 'bread', 'ham', 'carrot',
'broccoli', 'pizza', 'crackers', 'onion', 'banana', 'frozen dinner', 'cereals'
];
var search = prompt(inStock + " " + "Choose which things you want to buy, type 'done' when you are done." + " type one thing at the time.");
while (inStock.indexOf(search) > -1) {
alert("You grabbed a " + search + " and put it in the bag")
search = prompt(inStock + " " + "Choose which things you want to buy, type 'done' when you are done." + " type one thing at the time.")
if (search === "done") {
grocery();
}
}
function grocery() {
alert("You decided that its enough")
alert("In your bag you have " + search);
}
}
那是因为这行：
alert("In your bag you have " + search);
它显示“完成”，因为您在消息中输入了“搜索”值。您要求用户输入“完成”，因此
search=="done"您需要创建一些东西来保留输入的每个项目，例如另一个数组：
var inBag = [];
每次用户输入一个项目时，请像这样添加它：
inBag.push(search);
这是一个工作示例： https://jsfiddle.net/vknvLtzb/1/
问题是您每次都不断将
search也有几种方法可以做到这一点。我的偏好是创建一个数组并将所有未完成的输入粘贴到该数组中。然后你可以用“，”将它们连接起来并得到一个很好的句子。
添加这一点：
var search = prompt(inStock + " " + "Choose wich things you wanna buy, type 'done' when you are done." + " type one thing at the time.");
var bag = []; //Shorthand for an empty array
bag.push(search); //adding your first selection to the bag array
这声明了一个数组，因为 search 只是一个字符串值。这个
bag然后，将“如果完成”更改为：
if (search === "done") {
grocery();
}else{
bag.push(search);
}
这会检查每次尝试，如果未“完成”，则会将其添加到包中。否则它会调用你的函数。
然后将最后一点更改为：
alert("In your bag you have " + bag.join(", "));
join这是一个正在工作的小提琴。
您走在正确的轨道上，但主要问题是您不断地覆盖
searchfunction blue() {
var search;
var index;
var items = [];
var inStock = [
'apples',
'eggs',
'milk',
'cookies',
'cheese',
'bread',
'ham',
'carrot',
'broccoli',
'pizza',
'crackers',
'onion',
'banana',
'frozen dinner',
'cereals'
];
alert("You start walking on the blue road");
alert("You spot a grocery store at the side of the road.");
alert("You decide to walk inside, and buy yourself some food.");
alert("You open the door to the store, you hear a loud bell as you opened the door.");
alert("You notice the cashier turning her head towards you.");
alert("You take a bag, and nods politely, then walks in to the store.");
alert("Heres a list of all the things available in the store.");
search = promptMessage(inStock);
while (search !== 'done') {
index = inStock.indexOf(search);
if (index > -1) {
items.push(inStock.splice(index, 1)[0]);
alert("You grabbed a " + search + " and put it in the bag");
} else {
alert("Sorry, the store is out of " + search);
}
search = prompt(inStock);
}
grocery(items);
}
function promptMessage(inStock) {
return prompt(inStock + " Choose wich things you wanna buy, type 'done' when you are done. Type one thing at the time.");
}
function grocery(items) {
alert("You decided that its enough");
alert("In your bag you have " + items);
}
blue();您应该将商品存储在新数组中，如果商品有效，则从 inStock 数组中删除商品。
概念证明（也添加了缺失的分号）：
function blue() {
alert("You start walking on the blue road.");
alert("You spot a grocery store at the side of the road.");
alert("You decide to walk inside, and buy yourself some food.");
alert("You open the door to the store, you hear a loud bell as you opened the door.");
alert("You notice the cashier turning her head towards you.");
alert("You take a bag, and nods politely, then walks in to the store.");
alert("Heres a list of all the things available in the store.");
var inStock = [ 'apples', 'eggs', 'milk', 'cookies', 'cheese', 'bread', 'ham', 'carrot', 'broccoli', 'pizza', 'crackers', 'onion', 'banana', 'frozen dinner', 'cereals' ];
var results = [];
var search;
while (search !== 'done') {
search = prompt(inStock.join(', ') + "\n" + "Choose which things you wanna buy, type 'done' when you are done." + "\n" + "Type one thing at the time.");
if (search === "done") {
grocery();
break;
} else if (inStock.indexOf(search) > -1) {
alert("You grabbed a " + search + " and put it in the bag");
results.push(search);
inStock.splice(inStock.indexOf(search), 1);
} else {
alert("Invalid item.");
}
}
function grocery() {
alert("You decided that its enough")
alert("In your bag you have " + results.join(', '));
}
}
blue();