If I understand your data structure, you could do it the following way.

#!perl

use strict;

my %data = (
            'sort 1' => {'a.b.c' => ['19:20', '20:30'],
                         'a.b.d' => ['15:10', '19:40']},
            'sort 2' => {'e.f.g' => ['12:13'],
                         'g.h.i' => ['8:15', '23:11']});

my %times;

foreach my $sorter (values %data) {
    foreach my $domain (keys %$sorter) {
        foreach my $time (@{$sorter->{$domain}}) {
            push(@{$times{$time}}, $domain);
        }
    }
}

foreach my $time (sort { cmpTime($a, $b) } keys %times) {
    foreach my $domain (@{$times{$time}}) {
        print "domain: $domain, time: $time\n";
    }
}

sub cmpTime {
    my ($t1, $t2) = @_;
    my ($h1, $m1) = split(/:/, $t1);
    my ($h2, $m2) = split(/:/, $t2);
    return 60*$h1 + $m1 <=> 60*$h2 + $m2;
}

[download]

Of course, you'd have to adapt cmpTime to reflect the format your time stamps are in.

Hope this helps, -gjb-

In reply to Re: Hash of Arrays Sorting Problem by gjb
in thread Hash of Arrays Sorting Problem by Anonymous Monk

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