Hi, I just noticed an odd behavior in this Tk script, where a variable $b is used without being declared with "my $b", and strict dosn't issue a warning. Can someone tell me why? 
#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::Photo;
use Tk::JPEG;

# substitute any jpg file here, and it should be 
# scaled down by a factor of 4 and put in the 
# button
my $file   = "zen16.jpg";
my $w      = new MainWindow;

my $image1 = $w->Photo( -file => "$file", -format => 'jpeg' );

my $image  = $w->Photo();

$image->copy( $image1, -subsample => 4 );

$b = $w->Button( -image => $image )->pack();

$b->configure( -image => $image );

MainLoop;

[download]
I'm not really a human, but I play one on earth. Cogito ergo sum a bum

2006-07-05 Retitled by broquaint, as per Monastery guidelines
Original title: 'Why dosn't strict complain here'

In reply to Why doesn't strict complain here? by zentara

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.