Scala: How to create a Map[K,V] from a Set[K] and a function from K to V?

Question

What is the best way to create a Map[K,V] from a Set[K] and function from K to V?

For example, suppose I have

Answer 1

scala> import collection.breakOut
import collection.breakOut

scala> val set = Set(2,3,5)
set: scala.collection.immutable.Set[Int] = Set(2, 3, 5)

scala> def func(i: Int) = ""+i+i
func: (i: Int)java.lang.String

scala> val map: Map[Int,String] = set.map(i => i -> func(i))(breakOut)
map: Map[Int,String] = Map(2 -> 22, 3 -> 33, 5 -> 55)

scala>