indexOf没有返回正确的索引

问题描述：

目标：用户猜测一个字母后，检索字中字母的索引。

问题：返回的数字不是单词的正确索引。这是代码的第三行。

我是一个新手，所以请容易我:)请这么难！

// JavaScript Document 


$(document).ready(function() {  // upon page load 

    var badGuesses; // reset bad guess counter 
    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", "Z"]; // array of letters to choose 
    $("#lettersRemaining").html(alphabet); // gets elements of the alphabet array and displays on UI 

// N E W G A M E B U T T O N C L I C K E D 

$("#newGame").click(function() { // when user clicks on Start New Game button... 

    $("#status").hide(); // upon game reset hide the status section stating game over 
    badGuesses = 0; // reset guess counter which is used later 
    var wordCollection = ["mansion", "statue", "gorilla", "notebook", "smartphone", "illustration", "photo", "elegant", "arborist", "keyboard", "calendar", "capital", "textbook", "horrible", "library"]; // array of words 
    var theWord = wordCollection[Math.floor(Math.random()*wordCollection.length)]; // randomly selects a word 
     console.log("theWord is ...."); 
     console.log(theWord); 

    var theWordLength = theWord.length;  // Get number of characters in randomly selected word 
     console.log("theWordLength is ...."); 
     console.log(theWordLength); 

// D I S P L A Y D A S H E S 

    var combineDashes = []; // creates an array to hold the number of dashes inside the for loop 
    for (var i = theWordLength; i > 0; i--) 
     { 
      combineDashes.push(" - "); // each loop through adds a dash to the array 
     } 
    combineDashes.join(" "); // joins cumulative dashes and converts to a string 
    $("#dashes").html(combineDashes); // displays dashes on UI 

}); 


// G U E S S L E T T E R 

$("#guessLetter").click(function(theWord) {  // when user clicks on the Guess Letter button pass in theWord value .... 
    var letter = $("#theLetter").val(); // gets the letter the user is guessing 
    console.log("letter is ..."); 
    console.log(letter); 

    // Is the letter a good or bad guess? 
    var letterContained = theWord.toString().indexOf(letter); // <-- NOT WORKING!! returns index from theWord for the letter guessed; -1 means bad guess 
    console.log("letterContained is..."); 
    console.log(letterContained); 


}); 

});

你有没有尝试theWord.indexOf没有toString（） –

我认为你的字母是大写，你的话是小写和indexOf区分大小写。 –

如果我的预感是正确的，设置theWord = wordCollection [你在这里选择] .toUpperCase（）应该有帮助 –

答

这是所有在上面的意见，但问题是，theWord需要在同一水平badGuesses拟申报（并分配，但在newGame，就像badGuesses未申报），并作为一个参数被移除猜猜信。然后guessLetter具有期望的WORD值，并且indexOf调用起作用。

indexOf没有返回正确的索引

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