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Build a big vector for the memo table.

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Rob Rix 2016-06-06 23:15:33 -04:00
parent 0061d075f2
commit 3f93773159
1 changed files with 1 additions and 1 deletions
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src/SES.hs
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@ -82,7 +82,7 @@ memoizeEnum :: Enum a => (a -> b) -> a -> b
memoizeEnum f = (fmap f [toEnum 0 ..] !!) . fromEnum
memoize2d :: Int -> Int -> (Int -> Int -> a) -> (Int -> Int -> a)
memoize2d width height f = outof (fmap (into f) [0..] !!)
memoize2d width height f = outof (Vector.generate ((width + 1) * (height + 1)) (into f) Vector.!)
where into f i | width > 0 = if i < (width * height)
then f (i `div` width) (i `mod` width)
else f width height