




Description 
Highly random utility functions


Synopsis 

ghciSupported :: Bool   debugIsOn :: Bool   ghciTablesNextToCode :: Bool   picIsOn :: Bool   isWindowsHost :: Bool   isWindowsTarget :: Bool   isDarwinTarget :: 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]   unzipWith :: (a > b > c) > [(a, b)] > [c]   mapFst :: (a > c) > [(a, b)] > [(c, b)]   mapSnd :: (b > c) > [(a, b)] > [(a, c)]   mapAndUnzip :: (a > (b, c)) > [a] > ([b], [c])   mapAndUnzip3 :: (a > (b, c, d)) > [a] > ([b], [c], [d])   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   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   sortLe :: (a > a > Bool) > [a] > [a]   sortWith :: Ord b => (a > b) > [a] > [a]   on :: (a > a > c) > (b > a) > b > b > c   isEqual :: Ordering > Bool   eqListBy :: (a > a > Bool) > [a] > [a] > Bool   thenCmp :: Ordering > Ordering > Ordering   cmpList :: (a > a > Ordering) > [a] > [a] > Ordering   removeSpaces :: String > String   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   createDirectoryHierarchy :: FilePath > IO ()   doesDirNameExist :: FilePath > IO Bool   modificationTimeIfExists :: FilePath > IO (Maybe ClockTime)   global :: a > IORef a   consIORef :: IORef [a] > a > IO ()   globalMVar :: a > MVar a   globalEmptyMVar :: MVar a   type Suffix = String   splitLongestPrefix :: String > (Char > Bool) > (String, String)   escapeSpaces :: String > String   parseSearchPath :: String > [FilePath]     reslash :: Direction > FilePath > FilePath 



Flags dependent on the compiler build
















General list processing




zipWithEqual :: String > (a > b > c) > [a] > [b] > [c]  Source 


zipWith3Equal :: String > (a > b > c > d) > [a] > [b] > [c] > [d]  Source 


zipWith4Equal :: String > (a > b > c > d > e) > [a] > [b] > [c] > [d] > [e]  Source 


zipLazy :: [a] > [b] > [(a, b)]  Source 

zipLazy is a kind of zip that is lazy in the second list (observe the ~)


stretchZipWith :: (a > Bool) > b > (a > b > c) > [a] > [b] > [c]  Source 

stretchZipWith p z f xs ys stretches ys by inserting z in
the places where p returns True


unzipWith :: (a > b > c) > [(a, b)] > [c]  Source 


mapFst :: (a > c) > [(a, b)] > [(c, b)]  Source 


mapSnd :: (b > c) > [(a, b)] > [(a, c)]  Source 


mapAndUnzip :: (a > (b, c)) > [a] > ([b], [c])  Source 


mapAndUnzip3 :: (a > (b, c, d)) > [a] > ([b], [c], [d])  Source 





Like filter, only it reverses the sense of the test


partitionWith :: (a > Either b c) > [a] > ([b], [c])  Source 

Uses a function to determine which of two output lists an input element should join



Teases a list of Eithers apart into two lists


foldl1' :: (a > a > a) > [a] > a  Source 

A strict version of foldl1


foldl2 :: (acc > a > b > acc) > acc > [a] > [b] > acc  Source 







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








atLength :: ([a] > b) > (Int > b) > [a] > Int > b  Source 

atLength atLen atEnd ls n unravels list ls to position n. Precisely:
atLength atLenPred atEndPred ls n
 n < 0 = atLenPred n
 length ls < n = atEndPred (n  length ls)
 otherwise = atLenPred (drop n ls)




















List operations controlled by another list


takeList :: [b] > [a] > [a]  Source 


dropList :: [b] > [a] > [a]  Source 


splitAtList :: [b] > [a] > ([a], [a])  Source 






For loop



Compose a function with itself n times. (nth rather than twice)


Sorting




sortWith :: Ord b => (a > b) > [a] > [a]  Source 


on :: (a > a > c) > (b > a) > b > b > c  Source 


Comparisons












Transitive closures


transitiveClosure :: (a > [a]) > (a > a > Bool) > [a] > [a]  Source 


Strictness


seqList :: [a] > b > b  Source 


Module names




Argument processing








Floating point




IOish utilities
















Filenames and paths









The function splits the given string to substrings
using the searchPathSeparator.







Produced by Haddock version 2.6.0 