Hi piccard, I am assuming that you need to sort hashes of AAA, BBB...
The following works if my assumption is correct. 
#!/usr/bin/perl
use strict;
use warnings;

my($hash);
$hash->{"AAA"}->{"KEY1"} = "VALUE1";
$hash->{"AAA"}->{"KEY2"} = "VALUE2";
$hash->{"AAA"}->{"KEY3"} = "VALUE3";
$hash->{"BBB"}->{"KEY1"} = "VALUEA";
$hash->{"BBB"}->{"KEY2"} = "VALUEB";
$hash->{"BBB"}->{"KEY3"} = "VALUEC";

for my $set (sort {$hash->{$a}->{"KEY2"} cmp $hash->{$b}->{"KEY2"}} (k
+eys %{$hash})){
        print "$set:\n";
        for my $key (sort(keys %{$hash->{$set}})){
                print "\t$key: $hash->{$set}->{$key}\n";
        }
}

[download]
The above returns 
AAA:
        KEY1: VALUE1
        KEY2: VALUE2
        KEY3: VALUE3
BBB:
        KEY1: VALUEA
        KEY2: VALUEB
        KEY3: VALUEC

[download]
sort takes an optional code block which uses the package variables $a and $b for comparison of the members of the list.

Hope that helps

print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."

In reply to Re: Sorting a multidimensional hash by column by Utilitarian
in thread Sorting a multidimensional hash by column by piccard

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