We are pleased that the children are taking note of their lessons. ;)

I assumed that you were not using strictures because you didn't mention the warning and "uninitialized value" warnings are not subtle. I see now that you meant to imply that the mechanism of the bug was subtle, rather than that the effects were subtle or the location of the faulty code was difficult to determine. My appologies for the misunderstanding.

Note that we only know what you tell us. We didn't know from your node what the problem was - you didn't even present the output generated, nor the output you expected, let alone that you knew that the issue was an uninitialized value.

DWIM is Perl's answer to Gödel

In reply to Re^3: Regex capture consumed by non-capturing match by GrandFather
in thread Regex capture consumed by non-capturing match by ribasushi

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.