Sorting hash keys by sub hash values

ZlR has asked for the wisdom of the Perl Monks concerning the following question:

Hello monks,

I know i'm being a little lazy here, but i'm still working on cleaning my HoHoH script and it makes my head hurt !

I now have the following hash :

    'card' => {
                                     'mac1' => {
                                                             'fa' => '
+9A',
                                                             'port' =>
+ '0'
                                                           },
                                     'mac2' => {
                                                             'fa' => '
+8A',
                                                             'port' =>
+ '0'
                                                           }
                                   }
[download]

I want to sort the keys according to val, ie get : (item2, item1) since 8A < 9A

I've done that before but can find it back, i'm sure you have a gazillion ways of doing it :)

Comment on Sorting hash keys by sub hash values Download Code

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Re: Sorting hash keys by sub hash values by Corion (Patriarch) on Mar 31, 2010 at 13:28 UTC
Array of hash sorting problem, sorting hash of hash by values.	[reply]
Re^2: Sorting hash keys by sub hash values by ZlR (Chaplain) on Mar 31, 2010 at 14:02 UTC
ok, ok, so it wasn't so difficult to find a way to do it : `my $ref = $hash->{'card'} ; my @keys = sort { hex $ref->{$a}{'fa'} <=> hex $ref->{$b}{'fa'} } key +s % { $ref } ;` [download] Thanks !	[reply] [d/l]
Re: Sorting hash keys by sub hash values by moritz (Cardinal) on Mar 31, 2010 at 13:28 UTC
See perlfaq4 for answers to very similar problems. Perl 6 - links to (nearly) everything that is Perl 6.	[reply]