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authorJoe Zhao <ztuowen@gmail.com>2015-03-31 23:41:55 +0800
committerJoe Zhao <ztuowen@gmail.com>2015-03-31 23:41:55 +0800
commita9abc1da41b56edbed00081800382e854d6698d0 (patch)
tree5265cc1c5296768438b67299afd59bcc57c58f0c /H17.hs
parent378f6303e8860b7bbca7dea787d584a6728cebf1 (diff)
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rename to H**, +31 +32 +33 +34 +35 +36
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+split :: [a] -> Int -> ([a],[a])
+split xs c = splitHelper [] xs c
+ where
+ splitHelper pre nxt 0 = (reverse pre, nxt)
+ splitHelper pre (x:nxt) c = splitHelper (x:pre) nxt (c-1)
+
+split' (x:xs) c | c>0 =
+ let (pre,nxt) = split' xs (c-1)
+ in (x:pre,nxt)
+split' xs _ = ([],xs)