Talk:Graham Scan Implementation
Revision as of 06:28, 1 September 2014 by Hrk (talk | contribs) (→Use foldr to simplify buttonLeft: new section)
Use foldr to simplify buttonLeft
The buttonLeft function can be simplified using foldr like so:
buttonLeft :: [Pt] -> Pt buttonLeft = folrd minY (Pt (1/0, 1/0)) where minY (Pt (ax, ay)) (Pt (bx, by)) | ay > by = Pt (bx, by) | ay < by = Pt (ax, ay) | ax < bx = Pt (ax, ay) | otherwise = Pt (bx, by)