scala: union of two maps whose key type is the same and whose value type is a collection of elements, but whose types are different

Question

I would like to create a union of two maps whose key type is the same and whose value type is a collection of elements, but whose types are different.

Consider the f

Answer 1

This appears to work.

val peopleToChildrenAndDogs: Map[String, (Seq[Child], Seq[Pet])] = {
  (peopleToChildren.keySet ++ peopleToPets.keySet).map { k =>
    k -> (peopleToChildren.getOrElse(k, Seq())
         ,peopleToPets.getOrElse(k, Seq()))
  }.toMap
}

Get all the keys. For every key do a getOrElse() on each of the feeder Maps.