[Haskell-cafe] Something like scan1

Is there a generalisation of scan1, such that eg. foo (+) [0,1] (1,2) = [0,1,1,2,3,5,8,13,...] ? I came up with it while thinking about the equivalence of laziness and strictness resp. pull and push. To be more specific, I was thinking about ArrowLoop and how that beast generalises over time-varying values. It's some kind of helixoid fixed point (which might not help at all if your visualisation is incompatible with mine). -- (c) this sig last receiving data processing entity. Inspect headers for past copyright information. All rights reserved. Unauthorised copying, hiring, renting, public performance and/or broadcasting of this signature prohibited.