fpinscala/fpinscala — pull request #319 by orionll (2014-10-04 05:58:20+00:00)
Title: Actor.scala does not compile in Scala 2.11

Two methods apply with default arguments (the first from case class Actor and the second from object Apply) makes the code not compile in Scala 2.11. The easiest solution is to remove the default argument from case class.