... FAQs such as union, difference, intersection of lists are FAQs for a reason. ... it would be nice to have a real simple easy answer for p6.
And indeed it could be:
my @a is Set = (1,2,3); my @b is Set = (2,3,4);
say @a + @b; # (1,2,3,4) say @a / @b; # (2,3)
etc. Possibly with nice Unicode equivalents. -- TSa (Thomas Sandla▀)