1 /*def myassert(cond : => Boolean) = {

     2   try {

     3     assert(cond)

     4   } catch { 

     5     case _ : Throwable => System.exit(1)

     6   }

     7 }

     8 */

     9 // get_prices(List("GOOG", "AAPL"), 2010 to 2012)

    10 val urban_prices = List(List(Some(312.204773), Some(26.782711)), 

    11                         List(Some(301.0466), Some(41.244694)), 

    12                         List(Some(331.462585), Some(51.464207)))

    13 

    14 

    15 assert(CW6b.get_deltas(urban_prices) == List(List(Some(-0.03573991804411003), Some(0.539974575389325)), 

    16                                           List(Some(0.10103414222249969), Some(0.24777764141006836))))

    17 

    18 

    19 //get_prices(List("BIDU"), 2004 to 2008)

    20 val urban_prices2 = List(List(None), List(None), 

    21                          List(Some(6.35)), List(Some(12.241)), 

    22                          List(Some(38.188)))

    23 

    24 

    25 assert(CW6b.get_deltas(urban_prices2) == List(List(None), List(None), 

    26                                         List(Some(0.9277165354330709)), 

    27                                         List(Some(2.119679764725104))))