+
−
import CW7a._+
−
+
−
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)+
−