move demo documents into separate files

demo/docs/scala.scala

@@ -0,0 +1,12 @@
+//http://www.scala-lang.org/node/227
+/* Defines a new method 'sort' for array objects */
+object implicits extends Application {
+  implicit def arrayWrapper[A : ClassManifest](x: Array[A]) =
+    new {
+      def sort(p: (A, A) => Boolean) = {
+        util.Sorting.stableSort(x, p); x
+      }
+    }
+  val x = Array(2, 3, 1, 4)
+  println("x = "+ x.sort((x: Int, y: Int) => x < y))
+}