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scaladictionarypartialfunction

How can I convert scala Map to a partial function

Currently I use the following snippet of code:

private val aMap = Map(
  "J" -> Journey,
  "T" -> Training
)

def partialFunction = {
  case x if aMap isDefinedAt x => aMap(x)
}

It seems to me that Maps naturally should define a partial function. Does Scala have any standard/more concise and explicit way to convert a map to a partial function? Maybe some kind of an implicit conversion?

Solution

  • A Scala Map actually is a PartialFunction; you can just use it as such. No conversion required, implicit or explicit.

    For instance:

    val pf: PartialFunction[Int, String] = Map(1 -> "one")