+− +− def urbanmain() = {+− import C2._+− +− val urban_list1 = List("a", "b", "b", "c", "d")+− val urban_list2 = List("d", "b", "d", "b", "d")+− +− assert(overlap(urban_list1, urban_list2) == 0.5384615384615384)+− assert(overlap(urban_list1, urban_list1) == 1.0)+− assert(overlap(urban_list2, urban_list2) == 1.0)+− }+−