Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
I'm not sure how it would become empty randomly.

Yeah, me neither, but since you left out any inkling of where @dispRes and %hash come from, or how they are generated, or what might be in them, I am reduced to making wild guesses and suppositions. Having undefined column headings gives me an error similar to what you reported but I am running perl 5.16.1 so it may be different in newer Perls. Try running the following and see if your error is the same. If so, my previous comment stands, if not, well, sorry, my mind reading is not up to snuff.

use warnings; use strict; use Tk; my %w; $w{mw} = MainWindow->new; $w{lb} = $w{mw}->Scrolled( qw/MListbox -selectmode single -scrollbars oe -font small / )->pack(-expand => 1, -fill => 'both'); for my $x (qw//) { #for my $x (qw// || 'oops') { #for my $x (qw/a b c/) { $w{lb}->columnInsert('end', -text => $x ) ; } for (1 .. 10){ my @row = ($_, $_, $_,); $w{lb}->insert('end', \@row); $w{lb}->see('end'); $w{lb}->update; } MainLoop;

In reply to Re^3: TK MListbox random issue by thundergnat
in thread TK MListbox random issue by lightspd

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others chilling in the Monastery: (15)
    As of 2014-07-10 17:29 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      When choosing user names for websites, I prefer to use:








      Results (214 votes), past polls