gistfile1.scala

scala> :paste
// Entering paste mode (ctrl-D to finish)

  val doOne = (user: String) => List("one" + "*" + user)
  val doTwo = (user: String) => List("two" + "*" + user)
  val doThree = (user: String) => List("three" + "*" + user)

  def collectAll(funs: List[String => List[String]])(user: String): List[String] =
    (List[String]() /: funs)((a, b) => a ::: b(user))

  val actMap = Map(
    "one" -> List(doOne),
    "one+two" -> List(doOne, doTwo)
  )

  def act(action: String, user: String): List[String] = {
    collectAll(actMap(action))(user)
  }

// Exiting paste mode, now interpreting.

doOne: String => List[String] = <function1>
doTwo: String => List[String] = <function1>
doThree: String => List[String] = <function1>
collectAll: (funs: List[String => List[String]])(user: String)List[String]
actMap: scala.collection.immutable.Map[String,List[String => List[String]]] = Map(one -> List(<function1>), one+two -> List(<function1>, <function1>))
act: (action: String, user: String)List[String]

scala> 

scala> 

scala> act("one+two", "void")
res5: List[String] = List(one*void, two*void)

scala>