I see little to be 'sorry' about in your new code at Re: correspondence between two arrays -- aside from your opens (see the first bullet below for a preferred form). Unless that's the basis upon which other (aka "wiser"?) monks have downvoted the new node, I think the - -s are ill-justified: while 'XP is just a game,' some newcomers do still conflate rep and XP & mis-read a node's rep as a measure of its merit.

In any case, your latest would benefit from:

• syntactically-correct 3-argument opens with lexical handles and testing ( open($fh1,'<', "$file1")  or die "Can't open $file: $!"; where $file1 and $file2 are declared and instantiated with your filenames)
• use of strict and warnings (see The strictures, according to Seuss)
• better indentation (and vertical white space - Perl doesn't charge for either)
        ...and
• setting my $found to " " (e.g., for the sake of the reader/maintainer, an explicit string, rather than a number).

Please note also that the comment at line 7 in your first code (while -- arguably -- "technically correct") uses "hash" in a manner that's potentially misleading. Although PHP (for example) uses "hash" to describe the constructs there, the Perl venacular uses "array."

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