You've received some excellent advice about your code. At the risk of confusing the issue (and I apologize in advance if it does), consider the following:

use Modern::Perl;
use open ':utf8';
use autodie;

my (%nonmatchhash, @hashvalues);

open my $NONMATCHINPUT, '<', 'OutputNonMatchedWords.txt';

do { /(.*)\t(.*)/; $nonmatchhash{$1} = $2; push @hashvalues, $2 }
  for <$NONMATCHINPUT>;

close $NONMATCHINPUT;

while ( my ( $key, $value ) = each %nonmatchhash ) {

    given ($key) {
        when (/\A$value\z/) {
            say "key '$key' eq value '$value'";
        }

        when (/(.*)(agtig)(e|er|ste)?$/) {
            say "$key\t$_" 
              for grep /(.*)(achtig)(e|er|ste)?$/, @hashvalues;
        }

        default {
            say "No match for key '$key'";
        }
    }
}

[download]

From what I could gather from your code, it looks like you're taking an action after testing for three conditions, viz., 1) key/value equality, 2) matching a key, then a value under that key, and 3) no match. The script above handles these three cases, and may assist your coding decisions.

Hope this helps!

In reply to Re: Comparing hash keys and values with Regular Expressions by Kenosis
in thread Comparing hash keys and values with Regular Expressions by SayWhat?!

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.