2023: reformat Haskell

2023/1/Main.hs

@@ -1,3 +1,5 @@
+{-# LANGUAGE TupleSections #-}
+
 import           Data.Char (isDigit, digitToInt)
 import           Data.Function (on)
 import           Data.List (tails, findIndex, isPrefixOf, minimumBy)
@@ -15,19 +17,19 @@ wordMap = [ ("one", 1)
           , ("six", 6)
           , ("seven", 7)
           , ("eight", 8)
-          , ("nine", 9)
-          ]
+          , ("nine", 9)]
 
 fullWordMap :: [(String, Int)]
-fullWordMap = wordMap ++ (zip =<< map show) [1..9]
+fullWordMap = wordMap ++ (zip =<< map show) [1 .. 9]
 
 opLineBasic :: LineOp
-opLineBasic l = (combineDigits `on` ($ digitToInt <$> filter isDigit l)) head last
+opLineBasic l =
+  (combineDigits `on` ($ digitToInt <$> filter isDigit l)) head last
 
 firstNumInLine :: String -> [(String, Int)] -> Int
 firstNumInLine l = fst . minimumBy (compare `on` snd) . mapMaybe numIndex
   where
-    numIndex (str, num) = (num,) <$> findIndex (isPrefixOf str) (tails l)
+    numIndex (str, num) = (num, ) <$> findIndex (isPrefixOf str) (tails l)
 
 opLineAdvanced :: LineOp
 opLineAdvanced l = (combineDigits `on` uncurry firstNumInLine)

2023/12/Main1.hs

@@ -8,9 +8,8 @@ getConsecutives = map length . filter ((== '#') . head) . group
 allSprings :: String -> [String]
 allSprings = foldr (liftA2 (:) . getChars) [""]
   where
-    getChars c
-      | c == '?' = ['.', '#']
-      | otherwise = [c]
+    getChars '?' = ['.', '#']
+    getChars c = [c]
 
 solve :: [Int] -> String -> Int
 solve records = length . filter ((== records) . getConsecutives) . allSprings
@@ -21,4 +20,5 @@ parseLine l = (map read . splitOn "," $ y, x)
     (x:y:_) = splitOn " " l
 
 main :: IO ()
-main = print . sum . map (uncurry solve . parseLine) . lines =<< readFile "data.txt"
+main = print . sum . map (uncurry solve . parseLine) . lines
+  =<< readFile "data.txt"

2023/7/Main.hs

@@ -3,24 +3,35 @@ import Data.List (group, sort, sortOn)
 import qualified Data.HashMap.Strict as HMS
 
 cardOrder :: HMS.HashMap Char Int
-cardOrder = HMS.fromList $ zip "AKQT98765432J" [0..]
+cardOrder = HMS.fromList . zip "AKQT98765432J" $ [0 ..]
 
 getWorth :: String -> [Int]
-getWorth cards = handType : map (cardOrder HMS.!) cards
+getWorth cards = handType:map (cardOrder HMS.!) cards
   where
     noJs = filter (/= 'J') cards
+
     jCount = 5 - length noJs
-    groupedCards = map length $ group $ sort noJs
+
+    groupedCards = map length . group . sort $ noJs
+
     handType = case length groupedCards of
       0 -> 1
       1 -> 1
-      2 -> if minimum groupedCards == 1 then 2 else 3
-      3 -> if maximum groupedCards + jCount == 3 then 4 else 5
+      2 -> if minimum groupedCards == 1
+           then 2
+           else 3
+      3 -> if maximum groupedCards + jCount == 3
+           then 4
+           else 5
       4 -> 6
       5 -> 7
 
 solve :: [String] -> Int
-solve = sum . zipWith (*) [1..] . map snd . sortOn (map negate . getWorth . fst) . map parseLine
+solve = sum
+  . zipWith (*) [1 ..]
+  . map snd
+  . sortOn (map negate . getWorth . fst)
+  . map parseLine
   where
     parseLine = second read . splitAt 5
 

2023/8/Main1.hs

@@ -9,14 +9,14 @@ getDirection 'R' = snd
 countTimes :: String -> DataMap -> Int
 countTimes directions m = countTimes' directions "AAA" 0
   where
-    countTimes' (d:ds) s
-      | s == "ZZZ" = id
-      | otherwise = countTimes' ds (getDirection d $ m HMS.! s) . succ
+    countTimes' _ "ZZZ" = id
+    countTimes' (d:ds) s = countTimes' ds (getDirection d $ m HMS.! s) . succ
 
 getDataMap :: [String] -> DataMap
 getDataMap = HMS.fromList . map parseLine
   where
     get3At x = take 3 . drop x
+
     parseLine l = (get3At 0 l, (get3At 7 l, get3At 12 l))
 
 main :: IO ()

2023/8/Main2.hs

@@ -1,5 +1,5 @@
-import qualified Data.HashMap.Strict as HMS
 import           Data.List (foldl1')
+import qualified Data.HashMap.Strict as HMS
 
 type DataMap = HMS.HashMap String (String, String)
 
@@ -10,9 +10,9 @@ getDirection 'R' = snd
 countTimes :: String -> DataMap -> String -> Int
 countTimes directions m start = countTimes' directions start 0
   where
-    countTimes' (d:ds) ss@(s:_)
-      | s == 'Z' = id
-      | otherwise = countTimes' ds (getDirection d $ m HMS.! ss) . succ
+    countTimes' _ ('Z':_) = id
+    countTimes' (d:ds) ss@(s:_) = countTimes' ds (getDirection d $ m HMS.! ss)
+      . succ
 
 solve :: String -> DataMap -> Int
 solve directions m = foldl1' lcm
@@ -25,6 +25,7 @@ getDataMap :: [String] -> DataMap
 getDataMap = HMS.fromList . map parseLine
   where
     get3At x = reverse . take 3 . drop x
+
     parseLine l = (get3At 0 l, (get3At 7 l, get3At 12 l))
 
 main :: IO ()