Using a basic loop and List::Util. Most of the additional code is there for simple formatting.
use List::Util qw(max);
use warnings;
use strict;
my @array1 = (1..5, 10);
my @array2 = ('a'..'h');
my $length = max map {length} @array1;
for my $i (0..max($#array1, $#array2)) {
printf "% ${length}s %s\n", $array1[$i] // '', $array2[$i] // '';
}
__END__
1 a
2 b
3 c
4 d
5 e
10 f
g
h
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