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deque-blog/intersectAll.hs

Created September 9, 2017 17:01
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intersectAll.hs
intersectAll :: Foldable f => f (Shape coord) -> Shape coord
intersectAll shapes = Shape $ \coord -> all (`isInShape` coord) shapes
intersect :: Shape coord -> Shape coord -> Shape coord
intersect s1 s2 = intersectAll [s1, s2]
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