Re: [Haskell-cafe] Matching constructors

tootieIndices = findIndices isTootie where isTootie (Pa _) = False isTootie (Tootie _) = True would be my first approach. /g On 2/10/06, 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. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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