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rirakkumya/sample.scala

Created May 16, 2012 15:35
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[scala] Eitherのサンプル
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sample.scala
scala> val l = Left(3)
l: Left[Int,Nothing] = Left(3)
scala> val r = Right(3)
r: Right[Nothing,Int] = Right(3)
scala> def calc = (x:Either[Int,Int]) => x.right.map(_ + 2).left.map(_ * 2).right.map(_ + 3)
culc: Either[Int,Int] => Product with Either[Int,Int] with Serializable
scala> calc(r)
res10: Product with Either[Int,Int] with Serializable = Right(8)
scala> calc(l)
res11: Product with Either[Int,Int] with Serializable = Left(6)
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