diff --git a/2019/day7/day7.hs b/2019/day7/day7.hs
index 0ccab52..614bb04 100644
--- a/2019/day7/day7.hs
+++ b/2019/day7/day7.hs
@@ -11,44 +11,44 @@ type TuringMachine = (Tape,Int)
 main = do
     content <- readFile "input"
     let tape = fromList $ L.concatMap (L.map read . splitOn ",") (lines content)
-    print $ find_max tape [0..4]
-    print $ find_max tape [5..9]
+    print $ findMax tape [0..4]
+    print $ findMax tape [5..9]
 
-find_max :: Tape -> [Int] -> Int
-find_max tape range = L.maximum [run_amps_feedback tape xs | xs <- L.permutations range]
+findMax :: Tape -> [Int] -> Int
+findMax tape range = L.maximum [runAmps tape xs | xs <- L.permutations range]
 
-run_amps_feedback :: Tape -> [Int] -> Int
-run_amps_feedback tape intseq = L.head $ run_amps_feedback' tms intseq [0]
+runAmps :: Tape -> [Int] -> Int
+runAmps tape intseq = L.head $ runAmps' tms intseq [0]
     where tms = L.replicate 5 (tape,0)
 
-run_amps_feedback' :: [TuringMachine] -> [Int] -> [Int] -> [Int]
-run_amps_feedback' ((t,p):tms) intseq prev =
+runAmps' :: [TuringMachine] -> [Int] -> [Int] -> [Int]
+runAmps' ((t,p):tms) intseq prev =
     if halt == Halt then prev else
-        run_amps_feedback' (tms L.++ [tm_new]) tailseq tm_out
-    where (tm_new,tm_in,tm_out,halt) = exec_steps ((t,p),xprev,[],Continue)
+        runAmps' (tms L.++ [tm_new]) tailseq tm_out
+    where (tm_new,tm_in,tm_out,halt) = execSteps ((t,p),xprev,[],Continue)
           tailseq = if L.null intseq then [] else L.tail intseq
-          xprev = if L.null intseq then prev else (L.head intseq):prev
+          xprev = if L.null intseq then prev else L.head intseq:prev
 
-opl :: Int -> Int
-opl x
+opLength :: Int -> Int
+opLength x
     | n`L.elem`"1278"=4
     | n`L.elem`"56"=3
     | n`L.elem`"34"=2
     | otherwise=1
     where n = L.last $ show x
 
-parsemodes :: String -> [Bool]
-parsemodes m = L.replicate (3 - L.length l) False L.++ l
+parseModes :: String -> [Bool]
+parseModes m = L.replicate (3 - L.length l) False L.++ l
     where l = L.map (toEnum . digitToInt) m
 
-paramch :: [Bool] -> TapeSection -> Tape -> TapeSection
-paramch m opvec t = imap f (V.tail opvec)
-    where f i a = if (L.reverse m) !! i then a else t ! a
+paramChange :: [Bool] -> TapeSection -> Tape -> TapeSection
+paramChange m opvec t = imap f (V.tail opvec)
+    where f i a = if L.reverse m !! i then a else t ! a
 
-getopmodes :: TapeSection -> (String, [Bool])
-getopmodes opvec = (op_dedup,parsed_modes)
+getOpModes :: TapeSection -> (String, [Bool])
+getOpModes opvec = (op_dedup,parsed_modes)
     where (op,modes) = L.splitAt 2 $ L.reverse $ show $ opvec ! 0
-          parsed_modes = parsemodes $ L.reverse modes
+          parsed_modes = parseModes $ L.reverse modes
           op_dedup = if L.last op == '0' then [L.head op] else op
 
 step :: TapeSection -> (TuringMachine, [Int], [Int]) -> (TuringMachine, OutAction, [Int], [Int])
@@ -56,24 +56,24 @@ step opvec ((t,p),input,val)
         | op=="1" = (tm_binop (+),Continue,input,val)
         | op=="2" = (tm_binop (*),Continue,input,val)
         | op=="3" = (new_tm t (L.head input),Continue,L.tail input,val)
-        | op=="4" = ((t,p),Output,input,(V.last $ params):val)
-        | op=="5" = ((t, if (params ! 0)/=0 then (params ! 1) else p),Continue,input,val)
-        | op=="6" = ((t, if (params ! 0)==0 then (params ! 1) else p),Continue,input,val)
+        | op=="4" = ((t,p),Output,input,V.last params:val)
+        | op=="5" = ((t, if params ! 0/=0 then params ! 1 else p),Continue,input,val)
+        | op=="6" = ((t, if params ! 0==0 then params ! 1 else p),Continue,input,val)
         | op=="7" = (new_tm t (if (params ! 0)<(params ! 1)
                     then 1 else 0),Continue,input,val)
         | op=="8" = (new_tm t (if (params ! 0)==(params ! 1)
                     then 1 else 0),Continue,input,val)
         | op=="99" = ((t,p),Halt,input,val)
-        where (op,m) = getopmodes opvec
-              params = paramch m opvec t
+        where (op,m) = getOpModes opvec
+              params = paramChange m opvec t
               tm_binop x = new_tm t ((params ! 0) `x` (params ! 1))
-              new_tm t x = ((t // [((V.last opvec), x)]),p)
+              new_tm t x = (t // [(V.last opvec, x)],p)
 
-exec_steps :: (TuringMachine, [Int], [Int], OutAction) -> (TuringMachine, [Int], [Int], OutAction)
-exec_steps ((t,p),input,output,halt) =
-    let command_length = opl $ t ! p
+execSteps :: (TuringMachine, [Int], [Int], OutAction) -> (TuringMachine, [Int], [Int], OutAction)
+execSteps ((t,p),input,output,halt) =
+    let command_length = opLength $ t ! p
         opvec = slice p command_length t
         ((t_new,p_new),cond,input_new,output_new) =
             step opvec ((t,p+command_length),input,output) in
     if cond `L.elem` [Output, Halt] then ((t_new,p_new),input_new,output_new,cond)
-        else exec_steps ((t_new,p_new),input_new,output_new,cond)
+        else execSteps ((t_new,p_new),input_new,output_new,cond)