Convert hash into an array based matrix

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

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Re: Convert hash into an array based matrix by choroba (Cardinal) on Aug 13, 2013 at 14:03 UTC
Loops provided a solution where values are not sorted in the inner arrays. I was just about to post a similar solution: `my @array = map [ values %{ $HoH{$_} } ], sort keys %HoH;` [download] If you want to sort them byt he keys, you can use a bit more complicated incantation: `my @array = map { my $k = $_; [ map $HoH{$k}{$_}, sort keys %{ $HoH{$_} } ] } sort keys %HoH;` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l] [select]
Re^2: Convert hash into an array based matrix by Loops (Curate) on Aug 13, 2013 at 14:10 UTC
Yes, a more complete solution. Was just about to update my post with a solution like yours. ;o)	[reply]
Re: Convert hash into an array based matrix by NetWallah (Canon) on Aug 13, 2013 at 14:08 UTC
This one maintains 2 levels of Key order: `my @a=map { my $x=$_;[map { $HoH{$x}{$_} } sort keys %{$HoH{$x}} ] } + sort keys %HoH;` [download] Update: Just noticed that choroba beat me to the same solution. My goal ... to kill off the slow brain cells that are holding me back from synergizing my knowledge of vertically integrated mobile platforms in local cloud-based content management system datafication.	[reply] [d/l]
Re: Convert hash into an array based matrix by Loops (Curate) on Aug 13, 2013 at 13:58 UTC
`use Data::Dump qw(dd); my %HoH = ( A => { A => "1", B => "4", C => "2", }, B => { A => "4", B => "10", C => "3", }, C => { A => "2", B => "3", C => "9", }, ); my @a; push @a, [ values $HoH{$_} ] for sort keys %HoH; dd @a;` [download] Just iterate through each key, and accumulate the values into your array. The above prints: `([1, 2, 4], [4, 3, 10], [2, 9, 3])` [download]	[reply] [d/l] [select]
Re: Convert hash into an array based matrix by AnomalousMonk (Archbishop) on Aug 13, 2013 at 20:28 UTC
Uses arbitrary order, which could be sorted, or even two different orders: `>perl -wMstrict -le "use Test::More 'no_plan'; use Test::NoWarnings; ;; my %HoH = ( A => { A => '1', B => '4', C => '2', }, B => { A => '4', B => '10', C => '3', }, C => { A => '2', B => '3', C => '9', }, ); ;; my @order1 = my @order2 = ('A' .. 'C'); ;; my @ra = map [ @{ $HoH{$_} }{ @order1 } ], @order2; ;; my @array = ( [1, 4, 2], [4, 10, 3], [2, 3, 9]); ;; is_deeply \@ra, \@array; " ok 1 ok 2 - no warnings 1..2` [download] Update: Changed example code to show use of separate orders.	[reply] [d/l]
Re: Convert hash into an array based matrix by Anonymous Monk on Aug 13, 2013 at 14:07 UTC
See Also: converting a hash based matrix into an array based matrix	[reply]


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