How do I identify the corresponding position in a parallel array, if I know the index of the corresponding position in one array?_问答_开发者

How do I identify the corresponding position in a parallel array, if I know the index of the corresponding position in one array?

开发者 https://www.devze.com 2023-03-16 02:11 出处：网络

I have a simple JavaScript program to calculate the winner of an election. I use a FOR loop to assign the total of each candidates votes into a new array called totalVotesArray, I then output the corr

I then need to output the highest scoring candidate - I've used another FOR loop but I'm not sure I've done that part correctly. I'm stuck finding the index of the winning score and relating that the corresponding position in the parallel array.

Anyone know how I do this?

<HTML>
<HEAD>
<TITLE>
Election Results
</TITLE>
<LINK REL="stylesheet" TYPE="text/css" HREF="tma03.css">
<script type="text/javascript">

var candidateArray = ['Ms A  Brown .......', 
                      'Mr C Smith .......', 
                      'Ms F Patel .......', 
                      'Ms B Jones .......', 
                      'Mr E Williams...', 
                      'Mr D Johnson ....', 
                      'Ms G Taylor'];
var onlineVotesArray = [41,37,43,11,59,21,36];
var paperVotesArray = [22,3,15,11,7,1,18];


//initialises totalVotesArray with a new empty array the same size as candidateArray
var totalVotesArray = new Array(candidateArray.length)

//for loop counts the number of times the addition of the online and paper votes should be performed
for (var i = 0; i <= candidateArray.length; i = i + 1)
{
/*adds elements at the position in the onlineVotesArray Array to the开发者_如何学Go element in the same position in the paperVotesArray Array, and stores result in corresponding position in the total votes array  */
    totalVotesArray[i] = onlineVotesArray[i] + paperVotesArray[i];
}
//outputs the election report heading and results to the browser document window
document.write('Eatanswill Historical Society By Election' + '<BR>' + 'Declaration of Results' + '<BR>' + '<BR>');
document.write(candidateArray[0] + totalVotesArray[0] + '<BR>');
document.write(candidateArray[1] + totalVotesArray[1] + '<BR>');
document.write(candidateArray[2] + totalVotesArray[2] + '<BR>');
document.write(candidateArray[3] + totalVotesArray[3] + '<BR>');
document.write(candidateArray[4] + totalVotesArray[4] + '<BR>');
document.write(candidateArray[5] + totalVotesArray[5] + '<BR>');
document.write(candidateArray[6] + totalVotesArray[6] + '<BR>');
//this outputs an extra line break
document.write('<BR>');


//debugger;
var maximumTotalVoteIndex = 0;

for (var count = 1; count < totalVotesArray.length; count = count + 1)
{
    if (totalVotesArray[count] > maximumTotalVoteIndex)
        {
            maximumTotalVoteIndex = totalVotesArray[count];
        }
}

document.write( **THIS IS THE BIT I'M STUCK WITH** + ' is declared the winner');
</SCRIPT>

</HEAD>
<BODY>
</BODY>
</HTML>

try like this

var maximumTotalVoteIndex = 0;
    var maximumVote=totalVotesArray[0];

    for (var count = 1; count < totalVotesArray.length; count = count + 1)
    {
        if (totalVotesArray[count] > maximumVote)
            {
                maximumVote = totalVotesArray[count];
                maximumTotalVoteIndex = count;
            }
    }

    document.write("Highest scoring Candidate is "+candidateArray[maximumTotalVoteIndex]+"with votes"+maximumVote);

maximumTotalVoteIndex = totalVotesArray[count]; There is the main problem.

totalVotesArray[count] is the number of votes for the count-th person, whereas maximumTotalVoteIndex is the person.

So you should keep maximumTotalvoteIndex = count.

By the way, count should begins from 0 in your for loop.

Typo on this loop, should be < not <= so;

//for loop counts the number of times the addition of the online and paper votes should be performed
for (var i = 0; i < candidateArray.length; i++)

Then the simplest way later on, given that you must account for ties is to;

//get max value;
var maximumTotalVoteValue = 0;
for (var count = 0; count < totalVotesArray.length; count++) {
    if (totalVotesArray[count] > maximumTotalVoteValue) {
        maximumTotalVoteValue = totalVotesArray[count];
    }
}

//find ppl with maximum vote
var winners= [];
for (var count = 0; count < totalVotesArray.length; count++) {
    if (totalVotesArray[count] === maximumTotalVoteValue) {
        winners.push(candidateArray[count]);
    }
}

//show results
if (winners.length === 1) {
    document.write(winners[0] + " is declared the winner");
} else {
    document.write(" Tied: " + winners.join(" and "));
}

document.write(", with: " + maximumTotalVoteValue );