From 3ae71a6adaf7cb9249a1a610c228e8ac84afab6d Mon Sep 17 00:00:00 2001
From: Joe Zhao <ztuowen@gmail.com>
Date: Wed, 18 Mar 2015 15:09:18 +0800
Subject: +20 +21 +22 +23 +24 +25

---
 h20.hs | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 h20.hs

(limited to 'h20.hs')

diff --git a/h20.hs b/h20.hs
new file mode 100644
index 0000000..670edf6
--- /dev/null
+++ b/h20.hs
@@ -0,0 +1,7 @@
+import Control.Arrow
+removeAt :: Int -> [a] -> [a]
+removeAt n xs = (take (n-1) xs) ++ (drop n xs)
+
+removeAtT :: Int -> [a] -> (a,[a])
+removeAtT 1 (x:xs) = (x,xs)
+removeAtT n (x:xs) = (fst &&& ((x:).snd)) $ removeAtT (n-1) xs
-- 
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