I have a hash I am trying to sort. However, I am trying to sort it by deeper values than has been discussed on the monastery before. (I spent a good hour in the Super Search). So here's some test code: 
my %HoH =
( 1 => +{ foo => 'bar',
          baz => 'bletch', },
  2 => +{ foo => 'bar2',
          baz => 'bletch2', },
);

my @fookeys;

# select 'foo' from 'HoH' where 'foo' = 'bar2'
@fookeys = sort { $HoH{$a} -> {foo} eq 'bar2' } keys %HoH;

use Data::Dumper;

# fookeys is [ 1, 2 ]
print Dumper \@fookeys;

# try again
@fookeys = sort { $HoH{$a}{foo} eq 'bar2' } keys %HoH;

# fookeys is [ 1, 2 ]
print Dumper \@fookeys;

[download]
I want every key from HoH where $HoH -> {foo} eq 'bar2'. Seems to me that sort would work. Im actually pretty curious what it thinks im asking it to do. Can anyone shed some light on this?

Thanks,
brother dep.

--
Laziness, Impatience, Hubris, and Generosity.

In reply to Using 'sort' to emulate SQL's 'select'... by deprecated

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