Or you could go a step further and make an iterator.
sub break_by {
my ($by, $data) = @_;
my $i = 0;
return sub {
my $n = @$data - $i;
$n = $n < 0 ? 0 : $n > $by ? $by : $n;
$i += $n;
return @$data[$i-$n..$i-1];
}
}
my @data = ( 1,2,3,4,5,6,7,8,9,10,11,12 );
my $iter = break_by(5, \@data);
while (my @group = $iter->()) {
print("@group\n");
}
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