I'm using Perl with MySql. I have query that I'm using with fetchall_arrayref to grab results data from my survey application. As recommended by documentation I use foreach to loop through fetchall_arrayref. Inside of this loop, I loop through my $answer1 data and run a counter to count all of the answers for a question and I want the total. When I push this information into an array and try to grab the last element in that array, I don't get the desired output. I ran a test outside of my fetchall_arrayref foreach loop, using the same logic and it was successful in getting me what I needed.

Here's my code: 

my $testQuery = "SELECT questionNum, question, answer1 FROM results WH
+ERE title = ? ORDER BY questionNum";
my $sty = $dbh->prepare($testQuery);
$sty->execute($marathon);
my $potential = $sty->fetchall_arrayref();
$sty->finish;

my $previous_question;
my $previous_answer;
my $countEm;
my @total;
my @totalAnswer;
my @norm;
my $last_arr_index;
foreach my $data (@$potential) {
    my ($questionNumber, $question, $answer1) = @$data;
    $answeredOne = 0;
    print qq{<tr><td>$questionNumber. $question</td></tr>} unless $pre
+vious_question eq $question;
    if ($answer1 ne "" && $questionNumber == 1){
        $optionOne = $answer1;
        $answeredOne = $answeredOne + 1;
        $countEm++;
        push @total, $countEm;
        push @totalAnswer, $optionOne;
    }
    if ($answeredOne != 0){
        #my $elementCount = scalar(@total);
        #say $elementCount;
        say @total[-1];
    }

$previous_question = $question;
$previous_answer = @totalAnswer[2];
}#end foreach

[download]
When I print: say @total[-1]; gives me the output of "1 2 3" when I just need "3".

I tested this same logic outside of the fetchall_arrayref foreach loop and I got the desired output: 

my $counting;
my @totalCounting;
my @link = ('water', 'water', 'water', 'water', 'water');
foreach my $i (@link){
    $counting++;
    push @total``Counting, $counting;
}
say @totalCounting[-1];

[download]
say totalCounting[-1]; gives me "5".

Why won't this work inside of fetchall_arrayref?

In reply to How can I get the last element of an array inside of fetchall_arrayref? by Lewisa

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.