I'd use List::Compare (though I'm not sure I like its object-oriented interface)

Then use the same author’s List::Compare::Functional instead  :-)

#! perl
use strict;
use warnings;
use feature                   qw/ say /;
use List::Compare::Functional qw/ get_unique get_complement /;
use List::MoreUtils           qw/ uniq /;

my %hash1 = (abc => [1, 2, 3, 4]);
my %hash2 = (abc => [1, 3, 5, 7]);

$, = ',';

foreach my $key (uniq(keys %hash1, keys %hash2))
{
    say get_unique    ( [ $hash1{$key} // [], $hash2{$key} // [] ] );
    say get_complement( [ $hash1{$key} // [], $hash2{$key} // [] ] );
}

[download]

Output:

13:23 >perl 1000_SoPW.pl
2,4
5,7

13:23 >

[download]

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^2: Comparing 2 hash tables where values are stored in arrays by Athanasius
in thread Comparing 2 hash tables where values are stored in arrays by jumpingmonkey

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