1st commit on 059_haskell

2 files changed, 29 insertions, 0 deletions

diff --git a/challenge-059/stuart-little/haskell/ch-1.hs b/challenge-059/stuart-little/haskell/ch-1.hs
new file mode 100755
index 0000000000..c84128b8cd
--- /dev/null
+++ b/challenge-059/stuart-little/haskell/ch-1.hs
@@ -0,0 +1,12 @@
+#!/usr/bin/env runghc
+
+-- run <script> <cutoff_nr> <space-separated list entries>
+
+import System.Environment (getArgs,)
+import Control.Monad (liftM,)
+import Data.List (partition,)
+import Data.List.Utils (join,)
+
+main = do
+  (cut:rest) <- liftM (map (read::String->Int)) getArgs
+  putStrLn $ join " -> " $ map show $ uncurry (++) $ partition (cut >) rest
diff --git a/challenge-059/stuart-little/haskell/ch-2.hs b/challenge-059/stuart-little/haskell/ch-2.hs
new file mode 100755
index 0000000000..1269923da7
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+++ b/challenge-059/stuart-little/haskell/ch-2.hs
@@ -0,0 +1,17 @@
+#!/usr/bin/env runghc
+
+-- run <script> <space-separated numbers>
+
+import System.Environment (getArgs,)
+import Control.Monad (liftM,)
+import Data.Digits (digitsRev,)
+import Data.List (transpose,)
+import Data.List.Utils (countElem,)
+
+diffs :: Int -> [Int] -> Int
+diffs l xs = let (zeros,ones,lxs) = (countElem 0 xs,countElem 1 xs,length xs) in
+      div (l*(l-1) - ones*(ones - 1) - (zeros + l - lxs)*(zeros+l - lxs - 1)) 2
+
+main = do
+  nrs <- liftM (map (read::String->Int)) getArgs
+  print $ sum $ map (diffs $ length nrs) $ transpose $ map (digitsRev 2) nrs