isSubsetOf package:unordered-containers

isSubsetOf :: (Eq a, Hashable a) => HashSet a -> HashSet a -> Bool
unordered-containers Data.HashSet Data.HashSet.Internal
Inclusion of sets.

Examples

>>> fromList [1,3] `isSubsetOf` fromList [1,2,3]
True

>>> fromList [1,2] `isSubsetOf` fromList [1,3]
False