Okey, I admit it, that I really don't know what the Tony's post is it. I don't know what those option methods are and how those option methods exchange higher-order functions.
Rather, I do the tutorials from the scala-lang site. I did the case class exercise and I'm wondering that how the scala provides the equals, hashCode, toString methods. So, this is my aim for the next days, figure out it.
http://docs.scala-lang.org/tutorials/scala-for-java-programmers.html









