copy contents of immutable map to new mutable map [duplicate]

Question

Possible Duplicate:
How can I convert immutable.Map to mutable.Map in Scala?

How do I create a new mutable map with the contents of the immutable map in Scala?

So far I have tried:

val m:scala.collection.mutable.Map[Int, Double] = scala.collection.mutable.Map[Int, Double](imm.map({case(key, value) => (key -> value) }))

to no avail.

Answer 1

val im = Map(1->1.0, 2->3.0)
val mm = collection.mutable.Map[Int,Double]() ++= im