diff -r 3c1107984b41 -r 317a2532c567 scala/lib.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scala/lib.scala	Thu Feb 21 16:07:40 2013 +0000
@@ -0,0 +1,20 @@
+package object lib {
+
+//some list functions
+def tl[A](xs: List[A]) : List[A] = xs match {
+  case Nil => Nil
+  case x::xs => xs
+}
+
+def hd[A](xs: List[A]) : A = xs.head
+
+def nth_of[A](xs: List[A], n: Int) = 
+  if (n <= xs.length) Some(xs(n)) else None 
+
+//some map functions
+def dget(m: Map[Int, Int], n: Int) = m.getOrElse(n, 0)
+
+//some string functions
+def join[A](xs: List[A]) = xs.foldLeft("")(_.toString + _)
+
+}