scala: How to pass an expanded list as varargs into a method?
When creating a Map in scala, I call Map(entities.map{e => e.id -> e}), and I get:
found : scala.collection.mutable.IndexedSeq[(Int, Entity)]
required: (Int, Entity)
This is because the signature for Map.apply is: def apply[A, B](elems: (A, B)*): CC[A, B],
which requires a varargs style argument.
Is there a way to convert the IndexedSeq so that it can be accepted via Map.apply?
Solution 1:
Try this: Map(entities.map{e => e.id -> e}:_*)
Explicitly typing it as a varargs using :_* seems to work.
Solution 2:
Or this should work too:
entities.map{e => e.id -> e} toMap