indexOf 没有返回正确的索引

Question

回复：刽子手游戏

Objective：用户猜完一个字母后，检索该字母在单词中的索引。

问题：返回的数字不是单词的正确索引。倒数第三行代码。

我是新手所以请放轻松:)这太难了！

// 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);


});

});

Answer 1

上面的评论都是这样，但问题是 theWord 需要在与 badGuesses 相同的级别声明（并且在 newGame 中分配但不声明，就像 badGuesses 一样）并作为参数删除给 guessLetter .然后 guessLetter 得到了 theWord 的期望值，并且 indexOf 调用起作用了。

indexOf 没有返回正确的索引

indexOf not returning correct index

javascript

indexof