Hi all, I want to set up a two dimensional array hold start and stop positions. There are 8 rows and two columns (although there may be more rows in future). I have defined my array as: 
  my @Column_Info = { [ 1024, 1067 ],     # Column 1 start stop
                      [ 1068, 1093 ],     # Column 2 start stop
                      [ 1094, 1137 ],     # Column 3 start stop
                      [ 1138, 1163 ],     # Column 4 start stop
                      [ 1164, 1207 ],     # Column 5 start stop
                      [ 1208, 1233 ],     # Column 6 start stop
                      [ 1234, 1277 ],     # Column 7 start stop
                      [ 1278, 1321 ] };   # Column 8 start stop

[download]
When I try and use the array 
    my $StartPos = $Column_Info{$Count->[0]};    # Slot to start at
    my $Pos = $StartPos;    # Slot to start at
    my $EndPos = $Column_Info{$Count->[1]};

    open(IN,"cat /tmp/show_library.$$|");
    while (<IN>) {
      $_ =~ s/^ //;
      while ($Pos <= $EndPos) {
        if ($Pos == 1024) {
<snip>

[download]
I get the error 
Use of uninitialized value in numeric le (<=) at ./show_library.pl lin
+e 143, <IN> line 69.
Use of uninitialized value in printf at ./show_library.pl line 140, <I
+N> line 70.

[download]
How do I correctly set up and reference this array?
TIA
coec

PS: I have another question about returning a single dimension array from a subroutine but that can wait until later...

In reply to Two dimensional array problem by coec

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.