http://www.perlmonks.org?node_id=474156


in reply to Specific hash to array conversion query

Here's one with a subselect on the keys (you can do a sort to get whatever order for the keys - left as an exercise for the reader ;)
#!/usr/bin/perl use warnings; use strict; use Data::Dumper; my %properties = ( if_mac => { 0 => { value => '00:11:1A:F2:E1:92', fixed => 0 }, 1 => { value => '00:11:1A:F2:E1:93', fixed => 0 }, }, if_ip => { 0 => { value => '132.181.30.3', fixed => 0 }, 1 => { value => '132.181.30.4', fixed => 0 }, } ); my @values = map { my $key=$_; map { [ $key, $_, $properties{$key}->{$_}->{value} + ] } keys %{$properties{$_}}} keys %properties; print Dumper(\%properties); print "\n"; print Dumper(\@values), "\n"; __OUTPUT__ $VAR1 = { 'if_ip' => { '1' => { 'fixed' => 0, 'value' => '132.181.30.4' }, '0' => { 'fixed' => 0, 'value' => '132.181.30.3' } }, 'if_mac' => { '1' => { 'fixed' => 0, 'value' => '00:11:1A:F2:E1:93' }, '0' => { 'fixed' => 0, 'value' => '00:11:1A:F2:E1:92' } } }; $VAR1 = [ [ 'if_ip', '1', '132.181.30.4' ], [ 'if_ip', '0', '132.181.30.3' ], [ 'if_mac', '1', '00:11:1A:F2:E1:93' ], [ 'if_mac', '0', '00:11:1A:F2:E1:92' ] ];

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Re^2: Specific hash to array conversion query
by monarch (Priest) on Jul 11, 2005 at 23:00 UTC
    That is perfect. I like the way you've saved the value of the outer key map { my $key=$_; map... and used that in the inner query.