我创建了一个名为 try 的数组来收集用户猜到的数字。当用户最终猜到正确的数字时,会告诉用户尝试的次数和猜到的数字。我如何避免用户猜测他们已经猜到的数字?我知道每次猜测后我都必须检查数组,以查看该数字是否已经被猜测并且是否在数组中。 (如果猜测在数组中,显示消息说“你已经猜到了,再试一次”)另外,我应该将该猜测添加到猜测次数中还是不包括它,因为它是重复猜测?
let num = Math.floor(Math.random() * 20) + 1;
console.log(num);
let num_guess = 0
let tries = []
function do_guess() {
let guess = Number(document.getElementById("guess").value);
let message = document.getElementById("message");
if (isNaN(guess)) {
message.innerHTML = 'That is not a number!';
}
else if (guess > 20) {
message.innerHTML = 'That number is not in range, try again.';
num_guess++
tries.push(guess)
}
else if (guess > num) {
message.innerHTML = "No, try a lower number.";
num_guess++
tries.push(guess)
}
else if (guess < num) {
message.innerHTML = "No, try a higher number.";
num_guess++
tries.push(guess)
}
else if (guess == num) {
num_guess++
tries.push(guess)
message.innerHTML = "You got it! It took you " + num_guess + " tries and your guesses were " + tries + ".";
}
}
答案 0 :(得分:0)
简单,使用Array.includes
:
[1, 2, 3].includes(1)
> true
[1, 2, 3].includes(4)
> false
关于是否要包含重复的猜测:由您决定。
答案 1 :(得分:0)
您可以使用 includes 来检查数组中是否存在某个元素。
<块引用>includes() 方法判断一个数组是否包含某个 其条目之间的值,根据需要返回 true 或 false。
您需要在所有条件之前添加以下代码
db2 import ...
if (tries.includes(guess)) {
message.innerHTML = "You guessed that already, try again";
}
let num = Math.floor(Math.random() * 20) + 1;
console.log(num);
let num_guess = 0;
let tries = [];
const guessContainer = document.getElementById("guess");
const check = document.getElementById("check");
let message = document.getElementById("message");
guessContainer.addEventListener("keyup", (e) => {
message.innerHTML = "";
});
function do_guess() {
let guess = Number(guessContainer.value);
let isCorrect = false;
if (tries.includes(guess)) {
message.innerHTML = "You guessed that already, try again";
} else if (isNaN(guess)) {
message.innerHTML = "That is not a number!";
} else if (guess > 20) {
message.innerHTML = "That number is not in range, try again.";
num_guess++;
tries.push(guess);
} else if (guess > num) {
message.innerHTML = "No, try a lower number.";
num_guess++;
tries.push(guess);
} else if (guess < num) {
message.innerHTML = "No, try a higher number.";
num_guess++;
tries.push(guess);
} else if (guess == num) {
isCorrect = true;
num_guess++;
tries.push(guess);
message.innerHTML =
"You got it! It took you " +
num_guess +
" tries and your guesses were " +
tries +
".";
}
if (isCorrect) {
message.classList.add("right");
message.classList.remove("wrong");
} else {
message.classList.add("wrong");
message.classList.remove("right");
}
}
check.addEventListener("click", do_guess);
body {
padding: 1rem;
}
button {
background-color: indianred;
color: white;
border: none;
padding: .25rem .5rem;
border-radius: 4px;
text-transform: uppercase;
}
.wrong {
color: tomato;
}
.right {
color: green;
}
h5 {
margin-top: 1rem;
}
答案 2 :(得分:0)
试试这个:
var num = Math.floor(Math.random() * 20) + 1;
console.log(num);
var num_guess = 0;
var tries = [];
function go_guess() {
let guess = Number(document.getElementById("guess").value);
let message = document.getElementById("message");
if(tries.includes(guess)){
message.innerText = "You guessed that already, try again";
} else {
if (isNaN(guess)) {
message.innerHTML = 'That is not a number!';
}
else if (guess > 20) {
message.innerHTML = 'That number is not in range, try again.';
num_guess++;
tries.push(guess);
}
else if (guess > num) {
message.innerHTML = "No, try a lower number.";
num_guess++;
tries.push(guess);
}
else if (guess < num) {
message.innerHTML = "No, try a higher number.";
num_guess++;
tries.push(guess);
}
else if (guess == num) {
let _tries = `${tries[0]}`;
for(let i = 1;i<tries.length;i++){
_tries += `, ${tries[i]}`;
}
num_guess++;
message.innerText = `You got it! It took you ${num_guess} tries and your guesses were ${_tries}.`;
}
};
});