List::Compare was built for working with two, three or more arrays at once.
use List::Compare;
my @Llist = ('A','B','C','D','E');
my @Rlist = ( 'D','E','F','G','H','I','J');
my $lc = List::Compare->new(\@Llist, \@Rlist);
# If I read your post correctly,
# this is what you want.
my @LorRonly = $lc->get_symmetric_difference;
print join ", ", @LorRonly;
# Also does...
my @intersection = $lc->get_intersection;
my @union = $lc->get_union;
# And much, much more.
Output:
A, B, C, F, G, H, I, J
Cheers,
Brent
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