On Fri, 10 Feb 2006, Creighton Hogg wrote: > Hi, > If I have something like > data Patootie = Pa Int | Tootie Int > and I want to pull out the indices of all elements of a list > that have type constructor Tootie, how would I do that? > > I thought I might be able to use findIndices, but I don't > know how to express the predicate.
(\p -> case p of {Pa _ -> False; Tootie _ -> True}) _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe