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sadache/either-in-a-monad.scala

Created August 10, 2010 15:05
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either-in-a-monad.scala
case class Error(msg:String)
val one:Either[Int,Error]= Left(1)
val two:Either[Int,Error]= Right(Error("oops"))
val result=for(a<-one.left; t <- two.left) yield a + t
// defined class Error
// one: Either[Int,Error] = Left(1)
// two: Either[Int,Error] = Right(Error(oops))
// result: Either[Int,Error] = Right(Error(oops))
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