diff -r 59779ce322a6 -r ca48ac1d3c3e progs/lecture2.scala
--- a/progs/lecture2.scala	Sat Jun 22 08:39:52 2019 +0100
+++ b/progs/lecture2.scala	Wed Jul 24 14:22:06 2019 +0100
@@ -366,7 +366,7 @@
 
 
 // you can also have cases combined
-def season(month: String) = month match {
+def season(month: String) : String = month match {
   case "March" | "April" | "May" => "It's spring"
   case "June" | "July" | "August" => "It's summer"
   case "September" | "October" | "November" => "It's autumn"
@@ -380,6 +380,15 @@
 println(season("foobar"))
 
 
+// Days of the months
+def days(month: String) : Int = month match {
+  case "March" | "April" | "May" => 31
+  case "June" | "July" | "August" => 30
+}
+
+
+
+
 // Silly: fizz buzz
 def fizz_buzz(n: Int) : String = (n % 3, n % 5) match {
   case (0, 0) => "fizz buzz"