use feature ":5.14";
use warnings FATAL => qw(all);
use strict;
use Data::Dump qw(dump pp);

my %h1 = (key1=>[qw(1.1.1 1.1.2 1.1.3)], key2=>[qw(1.2.1 1.2.2 1.2.3)]
+);
my %h2 = (key1=>[qw(2.1.1 2.1.2 2.1.3)], key2=>[qw(2.2.1 2.2.2 2.2.3)]
+);

my %c; 
for my $h(\%h1, \%h2)
 {push @{$c{$_}}, $h->{$_} for keys %$h;
 }

pp(\%c)

[download]

Produces:

{
  key1 => [["1.1.1", "1.1.2", "1.1.3"], ["2.1.1", "2.1.2", "2.1.3"]],
  key2 => [["1.2.1", "1.2.2", "1.2.3"], ["2.2.1", "2.2.2", "2.2.3"]],
}

[download]

In reply to Re^3: how to use the values of the first hash to be the keys for the second hash by philiprbrenan
in thread how to use the values of the first hash to be the keys for the second hash by lrl1997

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