当正确猜到时，如何用字母替换字母占位符？

Question

每次我使用这段代码时，我都会猜错了。如果它在单词中，我需要它能够用下划线替换猜到的字母。

function guess(){
  for (var j = 0; j < words.length; j++) {
    if (words[j] === userGuesses) {
      underScores[j] = userGuesses
      randomWord--
    } else {
      return 'wrong letter'
    }
  }
}

这是我的完整代码，或者至少到目前为止我所拥有的代码。我需要这些字母也留下来，我需要弄清楚如何让他们输掉游戏，然后在3个错误的猜测之后显示单词而不会得到这个词。

console.log('HANGMAN\nTry to solve the puzzle by guessing letters using guess(letter).\nIf you miss a letter you get a strike.\nGet 3 strikes and you lose the game.\nTo select difficulty, type difficulty(difficulty).\nDifficulties:\nEasy\nMedium\nHard\nExtreme\nTo start game type start().')

const easyWords = [
  'DOG',
  'CAT',
  'HELLO',
  'FISH',
  'RED',
  'FOOD'
]

const mediumWords = [
  'I LIKE THE COLOR PINK',
  'MY FISHES NAME IS BEN',
  'THE GREATEST SHOWMAN IS THE BEST MOVIE',
  'OK GOOGLE HOW TO PASS IMD',
  'I WORK AT LANDMARK CINEMAS',
  'LEGO BATMAN IS THE ONLY GOOD BATMAN MOVIE'
]

const hardWords = [
  'THIS IS AN EXAMPLE OF A HARDER PHRASE THIS PROJECT IS SO HARD',
  'IVE BEEN STARING AT THIS PROJECT FOR 4 HOURS TODAY I DONT KNOW IF I CAN DO THIS ANYMORE',
  'I REALLY MISS MY DOG HER NAME IS CASSY AND SHES A SHIH TZU AND BARKS A LOT',
  'MY FAVOURITE SONG IS CALLED MASTERPIECE THEATRE PART 3 BY MARIANAS TRENCH',
  'I BOUGHT THE HEDLEY TICKETS 5 MONTHS BEFORE THE ALLEGATIONS CAME OUT',
  'CAN SOMEONE PLEASE HELP ME WITH THIS PROJECT OH  MY GOD'
]

const extremeWords = [
  'LOREM IPSUM DOLOR SIT AMET, CONSECTETUR ADIPISCING ELIT, SED DO EIUSMOD TEMPOR INCIDIDUNT UT LABORE ET DOLORE MAGNA ALIQUA. UT ENIM AD MINIM VENIAM, QUIS NOSTRUD EXERCITATION ULLAMCO LABORIS NISI UT ALIQUIP EX EA COMMODO CONSEQUAT. DUIS AUTE IRURE DOLOR IN REPREHENDERIT IN VOLUPTATE VELIT ESSE CILLUM DOLORE EU FUGIAT NULLA PARIATUR. EXCEPTEUR SINT OCCAECAT CUPIDATAT NON PROIDENT, SUNT IN CULPA QUI OFFICIA DESERUNT MOLLIT ANIM ID EST LABORUM',
  'According to all known laws of aviation, there is no way a bee should be able to fly. Its wings are too small to get its fat little body off the ground. The bee, of course, flies anyway because bees don`t care what humans think is impossible. Yellow, black. Yellow, black. Yellow, black. Yellow, black.'
]

const words = [
  'DOG',
  'CAT',
  'HELLO',
  'FISH',
  'RED',
  'FOOD',
  'I LIKE THE COLOR PINK',
  'MY FISHES NAME IS BEN',
  'THE GREATEST SHOWMAN IS THE BEST MOVIE',
  'OK GOOGLE HOW TO PASS IMD',
  'I WORK AT LANDMARK CINEMAS',
  'LEGO BATMAN IS THE ONLY GOOD BATMAN MOVIE',
  'THIS IS AN EXAMPLE OF A HARDER PHRASE THIS PROJECT IS SO HARD',
  'IVE BEEN STARING AT THIS PROJECT FOR 4 HOURS TODAY I DONT KNOW IF I CAN DO THIS ANYMORE',
  'I REALLY MISS MY DOG HER NAME IS CASSY AND SHES A SHIH TZU AND BARKS A LOT',
  'MY FAVOURITE SONG IS CALLED MASTERPIECE THEATRE PART 3 BY MARIANAS TRENCH',
  'I BOUGHT THE HEDLEY TICKETS 5 MONTHS BEFORE THE ALLEGATIONS CAME OUT',
  'CAN SOMEONE PLEASE HELP ME WITH THIS PROJECT OH  MY GOD',
  'LOREM IPSUM DOLOR SIT AMET, CONSECTETUR ADIPISCING ELIT, SED DO EIUSMOD TEMPOR INCIDIDUNT UT LABORE ET DOLORE MAGNA ALIQUA. UT ENIM AD MINIM VENIAM, QUIS NOSTRUD EXERCITATION ULLAMCO LABORIS NISI UT ALIQUIP EX EA COMMODO CONSEQUAT. DUIS AUTE IRURE DOLOR IN REPREHENDERIT IN VOLUPTATE VELIT ESSE CILLUM DOLORE EU FUGIAT NULLA PARIATUR. EXCEPTEUR SINT OCCAECAT CUPIDATAT NON PROIDENT, SUNT IN CULPA QUI OFFICIA DESERUNT MOLLIT ANIM ID EST LABORUM',
  'ACCORDING TO ALL KNOWN LAWS OF AVIATION, THERE IS NO WAY A BEE SHOULD BE ABLE TO FLY. ITS WINGS ARE TOO SMALL TO GET ITS FAT LITTLE BODY OFF THE GROUND. THE BEE, OF COURSE, FLIES ANYWAY BECAUSE BEES DON`T CARE WHAT HUMANS THINK IS IMPOSSIBLE. YELLOW, BLACK. YELLOW, BLACK. YELLOW, BLACK. YELLOW, BLACK.'
]

var randomWord = []
const underScores = []
const remainingLetters = words.length
const wrongLetter = []
const wrongGuessesLeft = 3
const userGuesses = []
const letter = []

function start(){
  return('Select difficulty by typing [difficulty](), else if type play() to randomize.')
}

function easy(){
  randomWord = easyWords[Math.floor(Math.random() * easyWords.length)]
  for (var i = 0; i < randomWord.length; i++) {
    underScores[i] = '_'
  }
  return(underScores)
}

function medium(){
  randomWord = mediumWords[Math.floor(Math.random() * mediumWords.length)]
  for (var i = 0; i < randomWord.length; i++) {
    underScores[i] = '_'
  }
  return(underScores)
}

function hard(){
  randomWord = hardWords[Math.floor(Math.random() * hardWords.length)]
  for (var i = 0; i < randomWord.length; i++) {
    underScores[i] = '_'
  }
  return(underScores)
}

function extreme(){
  randomWord = extremeWords[Math.floor(Math.random() * extremeWords.length)]
  for (var i = 0; i < randomWord.length; i++) {
    underScores[i] = '_'
  }
  return(underScores)
}

function play(){
  randomWord = words[Math.floor(Math.random() * words.length)]
  for (var i = 0; i < randomWord.length; i++) {
    underScores[i] = '_'
  }
  return(underScores)
}

function guess(){
  for (var j = 0; j < words.length; j++) {
    if (words[j] === userGuesses) {
      underScores[j] = userGuesses
      randomWord--
    } else {
      return 'wrong letter'
    }
  }
}

Answer 1

正则表达式解决方案可能如下所示：

• 当用户猜出一个字母时，你可以将push放入userGuesses数组中。
• 构造一个正则表达式，它将搜索不在数组中的任何字母：[^ABC ]将匹配A，B，C和空格以外的字符。
• replace全部与下划线匹配

var str = "IVE BEEN STARING AT THIS PROJECT FOR 4 HOURS TODAY I DONT KNOW IF I CAN DO THIS ANYMORE";
var userGuesses = ['A', 'B', 'C', ' '];

var regex = new RegExp('[^' + userGuesses.join("") + ']', 'g');

document.body.innerHTML = str.replace(regex, '_');

循环方法（看起来像你要走向）可能看起来像这样：

• 当用户猜出一个字母时，你可以将push放入userGuesses数组中。
• 循环实际的答案字符串 如果该字符包含在userGuesses数组中，请将该字符放入finalString 否则加下划线

var str = "IVE BEEN STARING AT THIS PROJECT FOR 4 HOURS TODAY I DONT KNOW IF I CAN DO THIS ANYMORE";
var userGuesses = ['A', 'B', 'C', ' '];
var finalString = "";

for (var i = 0; i < str.length; i++) {
  if (userGuesses.includes(str[i])) {
    finalString += str[i];
  } else {
    finalString += "_";
  }
}

document.body.innerHTML = finalString;