That's an enjoyable and educational read, thanks! There's one form under TMTOWTDI that I'd like to see, but can't figure out myself. It's the version analogous to this perl5 snippet-
sub odd {$_ % 2} say grep odd,0..6; -where the line that filters the list mentions no variables at all, and "$_" does its work behind the curtains. perl6 golfers, what can you formulate- using anything you like in the "odd" sub, not adding to the Int class, not using anything with a sigil in the filter expression? I haven't figured out how to match p5's brevity yet.