Scala's MapLike
trait has a method
mapValues [C] (f: (B) ⇒ C): Map[A, C]
But I sometimes want a different type:
mapKeysAndValues [C] (f: (A, B) ⇒ C): Map[A, C]
Is there a simple way to do this which I am missing? Of course, this can be done with a fold.
map
method iterates though all (key, value)
pairs. You can use it like this:
val m = Map("a" -> 1, "b" -> 2)
val incM = m map {case (key, value) => (key, value + 1)}