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dacr/stream4alternatives2

Created July 13, 2014 17:09
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stream4alternatives2
scala> def from1:Option[String]=None
from1: Option[String]
scala> def from2:Option[String]=Some("found")
from2: Option[String]
scala> def from3:Option[String]={println("oups"); Some("found again")}
from3: Option[String]
scala> val alts=from1#::from2#::from3#::Stream.empty
alts: scala.collection.immutable.Stream[Option[String]] = Stream(None, ?)
scala> alts.find(_.isDefined).getOrElse(Some("Default value"))
res3: Option[String] = Some(found)
scala>
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