The logic still depends on dividing the array length by the number of columns to obtain an approximation of the max rows required, so it won't always work as expected. I don't see any clean way to circumvent such a dependence, so failsafes would have to be implemented for uneven division results to ensure proper execution.
#!/usr/bin/perl
use strict;
my @sorted_list = qw(a b c d e f g h i j k l m n);
my @new_list;
my $cols = '3';
my $element = '0';
while ($element <= $#sorted_list) {
for my $x (0..(@sorted_list / $cols)) {
push @{$new_list[$x]}, $sorted_list[$element++];
}
}
for my $row (@new_list) {
for (@{$row}) {
print "$_ ";
}
print "\n";
}
__END__
a f k
b g l
c h m
d i n
e j
Roses are red, violets are blue. All my base, are belong to you.
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