On Thu, Mar 8, 2012 at 11:19 AM, Christopher Done <chrisd...@googlemail.com> wrote: > ‘Ello. > > Is there a generalization of this operator? It's all over the place, > it's basically > > (!) :: (Monad m, Indexed collection index value) => index -> > container -> m value > > We have `(!!)` on lists, `(!)` on maps, vectors, json objects, … > (doesn't seem there's one for bytestring) > > (Though I seem to recall the monadic return value being frowned upon > but I don't recall why.) > > Thoughts?
Perhaps Data.Key meets your needs? http://hackage.haskell.org/packages/archive/keys/2.1.2/doc/html/Data-Key.html Anthony _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
