[Haskell-beginners] Re: \x -> x < 0.5 && x > -0.5
stephen.tetley at gmail.com
Tue Oct 20 11:29:43 EDT 2009
Christian Maeder wrote:
> Hoogle did not find a function of type:
> (b -> b -> b) -> (a -> b) -> (a -> b) -> a -> b
> or (b -> c -> d) -> (a -> b) -> (a -> c) -> a -> d
> But maybe such a function is worth being added to Data.Function.
This is the big Phi or S' combinator. I would certainly second its
addition to Data.Function.
sprime p q r s = p (q s) (r s)
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