Tidying, mainly parsers

[advent-of-code-23.git] / advent07 / MainWithCase.hs

diff --git a/advent07/MainWithCase.hs b/advent07/MainWithCase.hs
index 36b4cd86a5178b4db55be5da2de60862907cc016..bd0aa85906dab170f5235500673f0ca25d3786f7 100644 (file)
--- a/advent07/MainWithCase.hs
+++ b/advent07/MainWithCase.hs
@@ -40,10 +40,7 @@ enJoker (Hand cards bid) = Hand jCards bid
   where jCards = replace Jack Joker cards
 
 replace :: Eq a => a -> a -> [a] -> [a]
-replace _ _ [] = []
-replace f t (x:xs) 
-  | x == f = t : replace f t xs
-  | otherwise = x : replace f t xs
+replace f t = fmap (\x -> if x == f then t else x)
 
 classify :: Hand -> ClassifiedHand
 classify (Hand cards bid) =
@@ -74,7 +71,7 @@ handP :: Parser Hand
 cardP :: Parser Card
 
 handsP = handP `sepBy` endOfLine
-handP = Hand <$> ((many1 cardP) <* space) <*> decimal
+handP = Hand <$> many1 cardP <* space <*> decimal
 
 cardP = (Two <$ "2") <|> (Three <$ "3") <|> (Four <$ "4") <|> 
         (Five <$ "5") <|> (Six <$ "6") <|> (Seven <$ "7") <|>