Contents

object NthPrime {
  // The stream will cache calculated primes. This is nice for performance,
  // but not so nice for memory utilization.
  private lazy val primes: Stream[BigInt] =
    Stream.cons(BigInt(2), primes.map(b => new BigInt(b.bigInteger.nextProbablePrime)))

  def prime(n: Int): Option[Int] =
    if (n < 1) None
    else Some(primes.drop(n - 1).head.toInt)
}

Version data entries

164 entries across 164 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.179	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.178	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.177	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.176	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.175	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.174	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.173	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.172	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.171	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.170	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.169	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.167	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.166	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.165	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.164	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.163	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.162	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.161	tracks/scala/exercises/nth-prime/example.scala
trackler-2.2.1.160	tracks/scala/exercises/nth-prime/example.scala