On Sun, Oct 10, 2010 at 4:47 PM, Ozgur Akgun <ozgurak...@gmail.com> wrote: > > On 10 October 2010 22:32, Johannes Waldmann <waldm...@imn.htwk-leipzig.de> > wrote: >> >> Oh, and while we're at it - are there standard notations >> for "forward" function composition and application? >> >> I mean instead of h . g . f $ x >> I'd sometimes prefer x ? f ? g ? h >> but what are the "?" > > While asking you use the same symbol for function composition, and something > like inverse function application. I don't think there exists an operator ?, > such that h . g . f $ x is equivalent to x ? f ? g ? h.
infixl 9 ? x ? f = f x h . g . f $ x = h (g (f x)) = h (g (x ? f)) = h (x ? f ? g) = x ? f ? g ? h Luke _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
