/*def myassert(cond : => Boolean) = {+− try {+− assert(cond)+− } catch { +− case _ : Throwable => System.exit(1)+− }+− }+− */+− +− assert(M1.get_first_price("GOOG", 1980) == None)+− assert(M1.get_first_price("GOOG", 2010) == Some(312.204773))+− +−