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{-# LANGUAGE TransformListComp #-}
-- GHC 7.0.1 failed because the renamer didn't attach
-- all the used variables to the TransformListComp constructor
module List where
intersectFront :: Ord a => [a] -> [a] -> [a]
intersectFront xs ys = [x | (x,y) <- zip xs ys, then takeWhile by x == y]
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