Javascript - 使用 document.onkeyup 拼接数组

Question

我正在制作一款刽子手游戏。我试图用 document.onkeyup 捕获用户猜测，然后从数组中拼接该项目。如果用户的猜测正确，那就是。这是我的功能:

var alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
var i = alphabet.indexOf;

document.onkeyup = function(event) {
  console.log("event=", event);
  var userGuess = String.fromCharCode(event.which).toLowerCase();

  if (userGuess === alphabet[1] || alphabet[2] || alphabet[3]) {

    alphabet.splice(i, 1 || 2 || 3);
    console.log(alphabet);
  }
};

这可能吗？或者我是否必须添加更多行代码才能达到相同的预期效果，因为我知道如何拼接和推送，但似乎不知道这是否可能？我已经搜索了相当长一段时间，似乎只能找到更复杂问题的答案。我知道这是一个基本问题，但我确实需要帮助 - 请并谢谢您。

Answer 1

您可以尝试以下解决方案。如果用户点击按钮并且给定的单词包含该指定字符，则将其从 alphabet 数组中删除。请随意修改它，如您所愿。

var words = "One apple a day",
    alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];

document.addEventListener('keyup', function(e) { //listen to the keyboard events
  if (e.keyCode > 64 && e.keyCode < 91 && alphabet.indexOf(e.key) > -1) { //to avoid spam with logs, we will restrict the range of keycodes from 64 to 91 (a-z) ===> a keycode is 65, z is 90 
    if (words.indexOf(e.key) > -1) { //if clicked letter is included inside the words
      alphabet.splice(alphabet.indexOf(e.key), 1); //then remove it from the alphabet
      console.log('correct letter');
    } else {
      console.log('incorrect letter');
    }
    console.log(JSON.stringify(alphabet)); //show the alphabet and its actual state
  }
});