A little point-free tweak

diff --git a/advent01/Main.hs b/advent01/Main.hs
index 535fdf45410bf4884cc4103e426c6e25c079b69a..9d627260e2887769b4e74d8f7546fcc94bac9b25 100644 (file)
--- a/advent01/Main.hs
+++ b/advent01/Main.hs
@@ -12,7 +12,7 @@ part1 = countIncreasing
 
 part2 :: [Int] -> Int
 part2 nums = countIncreasing $ map sum windows
-  where windows = filter (\w -> length w == 3) $ map (take 3) $ tails nums
+  where windows = filter ((== 3) . length) $ map (take 3) $ tails nums
 
 countIncreasing :: [Int] -> Int
 countIncreasing nums = length $ filter (> 0) $ zipWith (-) (tail nums) nums