Given the distinction between lists and sets, you might also consider Prelude Data.Set Data.List> [] `isInfixOf` [1,2,3] True Prelude Data.Set Data.List> (fromList []) `isSubsetOf` (fromList [1,2,3]) True Of course `isInfixOf` is in general more restrictive than `isSubsetOf`, in the sense that the infix relationship depends on ordering, which the subset relationship does not. Hope that helps, -jn- On Wed, Mar 25, 2015 at 8:55 AM, Shishir Srivastava < shishir.srivastava@gmail.com> wrote:
Hi,
Can someone please explain why this results in error -
[] `elem` [1,2,3]
Shouldn't the empty set by definition be the element of all sets including a non-empty set ?
I am assuming 'Lists' are different from 'Sets' in Haskell, if yes, is there a separate module for dealing/working with sets ?
Thanks, Shishir Srivastava
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