Here is a simple example of the mistake you're making by defining the sub within a loop, and then using a loop-scoped variable as a global passing into the sub:

use strict; 
use warnings; 
use Modern::Perl;

for ( 1 .. 10 ) {
    my $iterator = $_;
    test();
    sub test {
        say $iterator;
    }
}

[download]

The result printed is '1' on every iteration. This is because the sub can only be defined one time. That one time it's defined all the variables available to it will be cemented into place. The definition can not change even though the loop *appears* to be re-defining it. This means that the first iteration of the loop creates a closure around the sub, and only those variables available to it on the first iteration will be available to it ever.


Dave

In reply to Re^2: exiting a for loop by davido
in thread exiting a for loop by velocitymodel

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.