Can you please show some examples where it might be useful? I miss the point.
Thanks, Thiago. 2012/10/26 John Wiegley <[email protected]>: >>>>>> Greg Fitzgerald <[email protected]> writes: > >> I've recently found myself using the expression: "foldr (.) id" to compose a >> list (or Foldable) of functions. > > You want the Endo monoid: > > ghci> appEndo (Endo (+ 10) <> Endo (+ 20)) $ 3 > 33 > > John > > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
