I, too, am a bit confused about just what you want. See much more about working with complex data structures in the Perl Data Structures Cookbook.

However, here's an approach that might be useful:

Win8 Strawberry 5.8.9.5 (32)  Sun 09/24/2023 19:20:01
C:\@Work\Perl\monks
>perl

use strict;
use warnings;

# Subscription DATA sets
my @Subscription = (
    { 'Sub_Name' => "Morph",  'Archive_File' => "Morph Archive.txt", }
+,
    { 'Sub_Name' => "Cat",    'Archive_File' => "Cat Archive.txt",   }
+,
    { 'Sub_Name' => "Hydro",  'Archive_File' => "Hydro Archive.txt", }
+,
    { 'Sub_Name' => "Foo",    'Zip'          => "Xyzzy Archive.txt", }
+,
    { 'Sub_Name' => "Bar",                                           }
+,
    { 'Xyzzy'    => "Foo",    'Archive_File' => "Xyzzy Archive.txt", }
+,
    { 'Xyzzy'    => "Foo",    'Zot'          => "Xyzzy Archive.txt", }
+,
    { 'Xyzzy'    => "Bar",                                           }
+,
    );

key_extract_and_handle(\@Subscription, 'Sub_Name', \&hashref_handler_e
+xample);

exit;

sub key_extract_and_handle {

    my ($ar_hashes,      # required: ref to array of refs to hashes (A
+oH)
        $key_to_handle,  # required: string: key in each hash to handl
+e
        $cr_handle,      # required: ref to code of handler
        ) = @_;

    for my $hash_ref (@$ar_hashes) {
        $cr_handle->($hash_ref, $key_to_handle);
        }

    }

sub hashref_handler_example {

    my ($hashref,        # required: ref to hash
        $key_to_handle,  # required: string: key in hash to handle
        ) = @_;

    print "checking subscription ";
    if (exists $hashref->{$key_to_handle}) {
        print "'$hashref->{$key_to_handle}' ";
        }
    else {
        print "(exception: subscription key '$key_to_handle' absent) \
+n";
        return;  # or maybe warn or die
        }

    print "via archive file ";
    if (exists $hashref->{'Archive_File'}) {
        print "'$hashref->{'Archive_File'}': ";
        }
    else {
        print "(exception: archive file absent) \n";
        return;
        }

    # do actual subscription currency check here
    print "ok \n";  # or whatever...

    }

^Z
checking subscription 'Morph' via archive file 'Morph Archive.txt': ok
checking subscription 'Cat' via archive file 'Cat Archive.txt': ok
checking subscription 'Hydro' via archive file 'Hydro Archive.txt': ok
checking subscription 'Foo' via archive file (exception: archive file 
+absent)
checking subscription 'Bar' via archive file (exception: archive file 
+absent)
checking subscription (exception: subscription key 'Sub_Name' absent)
checking subscription (exception: subscription key 'Sub_Name' absent)
checking subscription (exception: subscription key 'Sub_Name' absent)
[download]

Update: Posting error at about line 18
    key_extract_and_handle(\@Subscription, 'Sub_Name', \&hashref_handler_example);
Semicolon was missing at end of statement. Fixed.

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.