Util

Contents

• Flags dependent on the compiler build
• General list processing
• Tuples
• List operations controlled by another list
• For loop
• Sorting
• Comparisons
• Edit distance
• Transitive closures
• Strictness
• Module names
• Argument processing
• Floating point
• read helpers
• IO-ish utilities
• Filenames and paths
• Utils for defining Data instances
• Utils for printing C code
• Hashing

Description

Synopsis

• ghciSupported :: Bool
• debugIsOn :: Bool
• ncgDebugIsOn :: Bool
• ghciTablesNextToCode :: Bool
• isWindowsHost :: Bool
• isDarwinHost :: Bool
• zipEqual :: String -> [a] -> [b] -> [(a, b)]
• zipWithEqual :: String -> (a -> b -> c) -> [a] -> [b] -> [c]
• zipWith3Equal :: String -> (a -> b -> c -> d) -> [a] -> [b] -> [c] -> [d]
• zipWith4Equal :: String -> (a -> b -> c -> d -> e) -> [a] -> [b] -> [c] -> [d] -> [e]
• zipLazy :: [a] -> [b] -> [(a, b)]
• stretchZipWith :: (a -> Bool) -> b -> (a -> b -> c) -> [a] -> [b] -> [c]
• zipWithAndUnzip :: (a -> b -> (c, d)) -> [a] -> [b] -> ([c], [d])
• unzipWith :: (a -> b -> c) -> [(a, b)] -> [c]
• mapFst :: (a -> c) -> [(a, b)] -> [(c, b)]
• mapSnd :: (b -> c) -> [(a, b)] -> [(a, c)]
• chkAppend :: [a] -> [a] -> [a]
• mapAndUnzip :: (a -> (b, c)) -> [a] -> ([b], [c])
• mapAndUnzip3 :: (a -> (b, c, d)) -> [a] -> ([b], [c], [d])
• mapAccumL2 :: (s1 -> s2 -> a -> (s1, s2, b)) -> s1 -> s2 -> [a] -> (s1, s2, [b])
• nOfThem :: Int -> a -> [a]
• filterOut :: (a -> Bool) -> [a] -> [a]
• partitionWith :: (a -> Either b c) -> [a] -> ([b], [c])
• splitEithers :: [Either a b] -> ([a], [b])
• foldl1' :: (a -> a -> a) -> [a] -> a
• foldl2 :: (acc -> a -> b -> acc) -> acc -> [a] -> [b] -> acc
• count :: (a -> Bool) -> [a] -> Int
• all2 :: (a -> b -> Bool) -> [a] -> [b] -> Bool
• lengthExceeds :: [a] -> Int -> Bool
• lengthIs :: [a] -> Int -> Bool
• lengthAtLeast :: [a] -> Int -> Bool
• listLengthCmp :: [a] -> Int -> Ordering
• atLength :: ([a] -> b) -> (Int -> b) -> [a] -> Int -> b
• equalLength :: [a] -> [b] -> Bool
• compareLength :: [a] -> [b] -> Ordering
• isSingleton :: [a] -> Bool
• only :: [a] -> a
• singleton :: a -> [a]
• notNull :: [a] -> Bool
• snocView :: [a] -> Maybe ([a], a)
• isIn :: Eq a => String -> a -> [a] -> Bool
• isn'tIn :: Eq a => String -> a -> [a] -> Bool
• fstOf3 :: (a, b, c) -> a
• sndOf3 :: (a, b, c) -> b
• thirdOf3 :: (a, b, c) -> c
• firstM :: Monad m => (a -> m c) -> (a, b) -> m (c, b)
• first3M :: Monad m => (a -> m d) -> (a, b, c) -> m (d, b, c)
• third3 :: (c -> d) -> (a, b, c) -> (a, b, d)
• uncurry3 :: (a -> b -> c -> d) -> (a, b, c) -> d
• takeList :: [b] -> [a] -> [a]
• dropList :: [b] -> [a] -> [a]
• splitAtList :: [b] -> [a] -> ([a], [a])
• split :: Char -> String -> [String]
• dropTail :: Int -> [a] -> [a]
• nTimes :: Int -> (a -> a) -> a -> a
• sortWith :: Ord b => (a -> b) -> [a] -> [a]
• minWith :: Ord b => (a -> b) -> [a] -> a
• isEqual :: Ordering -> Bool
• eqListBy :: (a -> a -> Bool) -> [a] -> [a] -> Bool
• eqMaybeBy :: (a -> a -> Bool) -> Maybe a -> Maybe a -> Bool
• thenCmp :: Ordering -> Ordering -> Ordering
• cmpList :: (a -> a -> Ordering) -> [a] -> [a] -> Ordering
• removeSpaces :: String -> String
• fuzzyMatch :: String -> [String] -> [String]
• fuzzyLookup :: String -> [(String, a)] -> [a]
• transitiveClosure :: (a -> [a]) -> (a -> a -> Bool) -> [a] -> [a]
• seqList :: [a] -> b -> b
• looksLikeModuleName :: String -> Bool
• getCmd :: String -> Either String (String, String)
• toCmdArgs :: String -> Either String (String, [String])
• toArgs :: String -> Either String [String]
• readRational :: String -> Rational
• maybeRead :: Read a => String -> Maybe a
• maybeReadFuzzy :: Read a => String -> Maybe a
• doesDirNameExist :: FilePath -> IO Bool
• getModificationUTCTime :: FilePath -> IO UTCTime
• modificationTimeIfExists :: FilePath -> IO (Maybe UTCTime)
• global :: a -> IORef a
• consIORef :: IORef [a] -> a -> IO ()
• globalM :: IO a -> IORef a
• type Suffix = String
• splitLongestPrefix :: String -> (Char -> Bool) -> (String, String)
• escapeSpaces :: String -> String
• parseSearchPath :: String -> [FilePath]
• data Direction
  • = Forwards
  • | Backwards
• reslash :: Direction -> FilePath -> FilePath
• makeRelativeTo :: FilePath -> FilePath -> FilePath
• abstractConstr :: String -> Constr
• abstractDataType :: String -> DataType
• mkNoRepType :: String -> DataType
• charToC :: Word8 -> String
• hashString :: String -> Int32

Flags dependent on the compiler build

General list processing

 (lengthExceeds xs n) = (length xs > n)

  atLength atLenPred atEndPred ls n
   | n < 0         = atLenPred n
   | length ls < n = atEndPred (n - length ls)
   | otherwise     = atLenPred (drop n ls)

Tuples

List operations controlled by another list

For loop

Sorting

Comparisons

Edit distance

Transitive closures

Strictness

Module names

Argument processing

Floating point

read helpers

IO-ish utilities

Filenames and paths

Utils for defining Data instances

Utils for printing C code

Hashing

 hashString = foldl' f golden
   where f m c = fromIntegral (ord c) * magic + hashInt32 m
         magic = 0xdeadbeef

 testp :: Int32 -> Int
 testp k = (n - ) . length . group . sort . map hs . take n $ ls
   where ls = [] : [c : l | l <- ls, c <- ['\0'..'\xff']]
         hs = foldl' f golden
         f m c = fromIntegral (ord c) * k + hashInt32 m
         n = 100000