Hello perl monks, I am trying to loop through an array but am stuck pulling my hair out! Hoping you can assist. In the following example, it appears that the first loop cannot get the correct size of the first array; yet using similar code for the second it works fine

$arrref   = $queryHandle->fetchall_arrayref();
$colnames = $queryHandle->{NAME};
print Dumper($colnames);
print Dumper($arrref);

print "A size:" . @colnames . "\n";
for ($i=0; $i < @colnames; $i++) {

     print "A: " . $i . " : " . $colnames[$i] ."\n";
}

for ($i=0; $i<= @arrref; $i++) {
      print "B size:" . @{$arrref->[$i]} . "\n";
    for ($j=0; $j< @{$arrref->[$i]}; $j++) {
        print "B: " . $i . " : " . $j . " : " . $arrref->[$i]->[$j] . 
+"\n";
    }    
}

[download]
C:\temp>perl 1.pl
$VAR1 = [
          'MEASURE',
          'CNT'
        ];
$VAR1 = [
          [
            '# PLTADM Queries (ex batch) ',
            '0'
          ]
        ];
A size:0
B size:2
B: 0 : 0 : # PLTADM Queries (ex batch)
B: 0 : 1 : 0

[download]

In reply to Looping through an Array by jarrodb

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.