in reply to Hash with three keys
foreach my $key3 (sort keys %{$hash{$hash{$key1}} } ){ ... }
This may serve you better (untested):
foreach my $key3 (sort keys %{ $hash{$key1}{$key2} }) { ... }
Also note that with Perl version 5.14+, keys et al will take a hash reference directly: see keys EXPR
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Re^2: Hash with three keys
by Jeri (Scribe) on Dec 12, 2013 at 21:18 UTC |