Re: [Haskell-beginners] lifting to applicative: recomputing an argument each time it is used?

8 Sep 2012


      On Sat, Sep 8, 2012 at 5:40 PM, Chaddaï Fouché wrote:
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listOfN n g = replicateM n g
mixIntersperse genSep genWord = do
  n <- arbitrary
Probably you should rather use
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Positive n <- arbitrary
No reason to waste your time checking empty lists after all...
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ws <- listOfN n genWord
  ss <- listOfN (n-1) genSep
  return $ interlace ws ss