diff -r a057dc4457fc -r 87b9e3e2c1a7 marking1/drumb_test5.scala
--- a/marking1/drumb_test5.scala	Tue Oct 29 11:11:44 2019 +0000
+++ b/marking1/drumb_test5.scala	Tue Oct 29 14:12:24 2019 +0000
@@ -1,18 +1,18 @@
-def myassert(cond : => Boolean) = {
+/*def myassert(cond : => Boolean) = {
   try {
     assert(cond)
   } catch { 
     case _ : Throwable => System.exit(1)
   }
 }
-
+*/
 // get_prices(List("GOOG", "AAPL"), 2010 to 2012)
 val urban_prices = List(List(Some(312.204773), Some(26.782711)), 
                         List(Some(301.0466), Some(41.244694)), 
                         List(Some(331.462585), Some(51.464207)))
 
 
-myassert(get_deltas(urban_prices) == List(List(Some(-0.03573991804411003), Some(0.539974575389325)), 
+assert(CW6b.get_deltas(urban_prices) == List(List(Some(-0.03573991804411003), Some(0.539974575389325)), 
                                           List(Some(0.10103414222249969), Some(0.24777764141006836))))
 
 
@@ -22,6 +22,6 @@
                          List(Some(38.188)))
 
 
-myassert(get_deltas(urban_prices2) == List(List(None), List(None), 
+assert(CW6b.get_deltas(urban_prices2) == List(List(None), List(None), 
                                         List(Some(0.9277165354330709)), 
                                         List(Some(2.119679764725104))))