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.

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