basic haskell: Comparing a set of Ints and a set of set of ints -


is there easy way in can check if 2 lists contain common elements.

ie

set1 = [1,2,3,4] set2 = [[1,5,7],[1,2,3,8]]

would there way potentially isolate elements in set1 not in of sets in set2? best way add x-amount of sets in set2 have 1 big set (using concat) compare set1 or waste of time?

much appreciated advice.

import data.set set foldl (\x y -> set.difference  x (set.fromlist y)) (set.fromlist set1) set2

gives following output:

fromlist [4]

and give members of set1 not in of sets within set2 - seems question.


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