CSC302 2011S, Class 12: Scala (1)

Overview:
* Lab.

Admin:
* Using second unexcused absence: AT
* As you might expect, Assignment 5 won't get posted until late tonight.
  (Maybe sooner if Aaron posts it.)
* The fire on Wednesday was two doors south of us.  Front page news!
* Reading for Sunday night: Tate 5.3.
* Our Web server appears to be down.  You can access the lab at 
  /home/rebelsky/Web/Courses/CSC302/2011S/Labs/scala-1.{html,pdf}.
* EC for CS Table today.

Lab

* You can load a file with
  :load file
* However, if loading a file fails, the various keys no longer work 
  correctly.  Yay good software design!

* What do you do if you want arbitrarily large integers?

var x = 12345678901

does not work

var x: BigInt = 12345678901

* Tail recursion
  * Removes obvious tail recursion

What do you think about Scala so far
* More natural than Io and Prolog
  def fun(x: Int): Int = 2+x
* Still doesn't type infer as well as I'd like
  def fun(x) = 2 + x

* What else seemed important