perl -MO=Deparse -MList::MoreUtils=uniq -e '
   @arr1=(1,2,1); @arr2=(2,3,3);
   my @foo = map { $_ } uniq @arr1, @arr2; 
   print @foo
'
use List::MoreUtils (split(/,/, 'uniq', 0));
@arr1 = (1, 2, 1);
@arr2 = (2, 3, 3);
my(@foo) = map({$_;} uniq(@arr1, @arr2));
print @foo;
-e syntax OK

##</code><code>##

perl -MList::MoreUtils=uniq -e '
   @arr1=(1,2,1); 
   @arr2=(2,3,3);
   my @foo = map {$_ } uniq @arr1, @arr2;
   print @foo
'
123