将变量与javascript中的特定字符串数组对象进行比较

Question

我是Java的新手，正在尝试做一个简单的猜彩色游戏，这是我的代码：

<!doctype html>
<html>
<head>
    <title>Guessing Color Game</title>
</head>
<body onload="do_game()">
<script>

    var target;
    var colors;
    var finished = false;
    var guess_input;
    var guesses = 0;


    var random_number = Math.random() * 11;
    var random_number_index = Math.floor(random_number);

    colors = ["Aqua", "Black", "Blue", "Brown", "Cyan", "Grey", "Green", "Orange", "Red", "White", "Yellow"];
    target = colors[random_number_index];

    function do_game() {

        alert("Hello mate, wanna play a game???");
        alert("You gotta guess a color, alright???");
        alert("Available colors are: \n\n0. Aqua \n1. Black \n2. Blue \n3. Brown \n4. Cyan \n5. Grey \n6. Green \n7. Orange" +
            " \n8. Red \n9. White \n10. Yellow");
        alert("Random color to guess is " + target + ", which is index " + random_number_index + " in the array");

        while (!finished) {
            guess_input = prompt("Write the name of your chosen color please:").toLowerCase();
            guesses++;
            finished = check_guess();
        }
    }

    function check_guess() {
        if (target == guess_input)
            return true;
    }
</script>
</body>
</html>

我的问题是使用check_guess（）函数：由于没有将目标与guess_input进行比较，我遇到了无限循环。 为什么会这样呢？

Answer 1

您正在使用小写的guess_input检查target颜色。

而是将.toLowerCase()应用于target和guess_input或者两者都不应用。

你需要检查.toLowerCase()的target色与的guess_input 。

因此，您唯一需要做的更改如下：

colors[random_number_index].toLowerCase();

  var target; var colors; var finished = false; var guess_input; var guesses = 0; var random_number = Math.random() * 11; var random_number_index = Math.floor(random_number); colors = ["Aqua", "Black", "Blue", "Brown", "Cyan", "Grey", "Green", "Orange", "Red", "White", "Yellow"]; target = colors[random_number_index].toLowerCase(); function do_game() { alert("Hello mate, wanna play a game???"); alert("You gotta guess a color, alright???"); alert("Available colors are: \\n\\n0. Aqua \\n1. Black \\n2. Blue \\n3. Brown \\n4. Cyan \\n5. Grey \\n6. Green \\n7. Orange" + " \\n8. Red \\n9. White \\n10. Yellow"); alert("Random color to guess is " + target + ", which is index " + random_number_index + " in the array"); while (!finished) { guess_input = prompt("Write the name of your chosen color please:").toLowerCase(); guesses++; finished = check_guess(); } } function check_guess() { console.log(target, guess_input) if (target == guess_input) return true; } do_game();

Answer 2

尝试这个：

function check_guess() {
  if (target === guess_input) {
    return true;
  }
}

将变量与javascript中的特定字符串数组对象进行比较

问题描述

2 个解决方案

解决方案1
1 已采纳 2017-01-15 04:03:20

解决方案2
-1 2017-01-15 04:00:48

将变量与javascript中的特定字符串数组对象进行比较

问题描述

2 个解决方案

解决方案1 1 已采纳 2017-01-15 04:03:20

解决方案2 -1 2017-01-15 04:00:48

解决方案1
1 已采纳 2017-01-15 04:03:20

解决方案2
-1 2017-01-15 04:00:48