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scalascala-option

Scala Option ||

I want to get the value of one of several Option in scala, like this:

def or(a:Option[Int], b:Option[Int]):Option[Int]=
    if (a.isDefined) a else b

val a= Option(1)
val b= Option(2)
or(a,b).get

but I wonder why isn't the || operator defined for Option? Is there a more idiomatic way of doing this?

Solution

  • Use orElse.

    scala> Some(1) orElse Some(2)
res0: Option[Int] = Some(1)

scala> (None: Option[Int]) orElse Some(2)
res1: Option[Int] = Some(2)