Here's a forward-looking approach: 
use Quantum::Superpositions;

my @arr1= qw (two two three five four six six six seven);
my @arr2= qw (one one three four bee seven eight six);

my @intersection = eigenstates(any(@arr1) eq any(@arr2));

print "There are ",scalar(@intersection)," common elements\n";
print "Values: @intersection\n";

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It should work perfectly the first time! - toma

In reply to Re: Code requested for array intersection count by toma
in thread Code requested for array intersection count by harry34

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