9 Dec
2010
9 Dec
'10
8:30 p.m.
On 10/12/10 10:02, Russ Abbott wrote:
I recently was writing code long these lines.
f x = p1 x || p2 x || ... || pn x
I would have liked to write that in pointfree form but couldn't find a library function to do it.
I created this.
disj :: [a -> Bool] -> a -> Bool disj ps = (\x -> or $ map ($x) ps)
disj2 p1 p2 = disj [p1, p2] disj3 p1 p2 p3 = disj [p1, p2] disj4 p1 p2 p3 p4 = disj [p1, p2] ...
With that I can write my function as follows.
f = disj pi p2 p3 ... pn
Is there a standard way to do this? / -- Russ/
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disj = fmap or . sequence -- Tony Morris http://tmorris.net/