Here's a variation on hdb's (nice++) approach that uses List::MoreUtils::part():
c:\@Work\Perl\monks\fidda>perl -wMstrict -le
"use List::MoreUtils qw(part);
;;
use constant KEYS => qw(H1 H2 H3 H4);
use constant ITEMS => 'A' .. 'O';
;;
my @steps = map { @$_, reverse @$_ } [ 0 .. KEYS-1 ];
;;
my $i = 0;
my @parts = part { $steps[ $i++ % @steps ] } ITEMS;
;;
my %h;
@h{ KEYS() } = @parts;
for my $k (KEYS) {
printf qq{$k };
printf qq{'$_' } for @{ $h{$k} };
print '';
}
"
H1 'A' 'H' 'I'
H2 'B' 'G' 'J' 'O'
H3 'C' 'F' 'K' 'N'
H4 'D' 'E' 'L' 'M'
If you don't like part(), you can use
my @parts;
push @{ $parts[ $steps[ $i++ % @steps ] ] }, $_ for ITEMS;
I kinda don't like the stray $i variable wandering through the code, but if you wrap this all up in a distributor function, this is no longer an issue.
Give a man a fish: <%-{-{-{-<
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