## this is an example, works just as well if these arrays come from a require'd file
my @array1 = qw(a b c);
my @array2 = qw(d e f);

## again, just an example, works just as well if this comes from GetOpt
my $opt_f = '@array1, @array2';

## here is the magical and evil eval
my @combined = eval "$opt_f";

print "@combined\n";