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dcsobral/sieve.scala

Created July 5, 2011 11:52
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Sieve of Eratosthenes One-Liner
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sieve.scala
(n: Int) => (2 to n) |> (r => r.foldLeft(r.toSet)((ps, x) => if (ps(x)) ps -- (x * x to n by x) else ps))
// Forward-pipe courtesy of Scalaz, or look here: http://stevegilham.blogspot.com/2009/01/pipe-operator-in-scala.html
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