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-rw-r--r--h27.hs13
1 files changed, 0 insertions, 13 deletions
diff --git a/h27.hs b/h27.hs
deleted file mode 100644
index 8c0dab1..0000000
--- a/h27.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-import Control.Arrow
-combination :: Int -> [a] -> [([a],[a])]
-combination 0 xs = [([],xs)]
-combination _ [] = []
-combination c (x:xs) = (map ((x:).fst &&& snd) (combination (c-1) xs)) ++ (map (fst &&& (x:).snd) (combination c xs))
-
-group :: [Int] -> [a] -> [[[a]]]
-group [] _ = [[]]
--- group [n] xs = map ((:[]).fst) (combination n xs)
-group (n:ns) xs = concatMap (\(comb,rest) -> map (comb:) (group ns rest)) (combination n xs)
-
-group' [] = const [[]]
-group' (n:ns) = concatMap (uncurry $ (. group' ns) . map . (:)) . combination n