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2 points by conanite 5606 days ago | link | parent

a faster 'in, without the nasty corner case:

  (mac faster-in (x . choices)
    (w/uniq g
      `(let ,g ,x
         (if ,@(mappend (fn (c) `((is ,g ,c) t)) choices)))))
it's a tiny difference, and if you know in advance you're not looking for nil, the other version is just as good.