Improving library documentation

If you find standard library documentation lacking in any way, please log it here. At the minimum record what library/module/function isn't properly documented. Please also suggest how to improve the documentation, in terms of examples, explanations and so on.

Example:

   package base
   Data.List
   unfoldr

   An example would be useful. Perhaps:

       -- A simple use of unfoldr:
       --
       -- > unfoldr (\b -> if b == 0 then Nothing else Just (b, b-1)) 10
       -- >  [10,9,8,7,6,5,4,3,2,1]
       --

dons 00:31, 26 November 2006 (UTC)

Tag your submission with your name by using 4 ~ characters, which will be expanded to your name and the date.

If you'd like, you can directly submit your suggestion as a darcs patch via the bug tracking system.

Please add your comments under the appropriate package:

base

   package base
   Data.Array.IO and Data.Array.MArray
   descriptions

   An example would be usefull.  Arrays can be very difficult when you see
   them the very first time ever with the assumption that you want to try 
   them right now and that Haskell is a relatively new to you. Maybe something 
   like this could be added into the descriptions of the array-modules.

   module Main where
   
   import Data.Array.IO
   
   -- Replace each element with 1/i, where i is the index starting from 1.
   -- Loop uses array reading and writing.
   loop :: IOUArray Int Double -> Int -> Int -> IO ()
   loop arr i aLast  
       | i > aLast = return ()
       | otherwise = do
            val <- readArray arr i
            writeArray arr i (val / (1+fromIntegral i))
            loop arr (i+1) aLast

    main = do
       arr <- newArray (0,9) 1.0   -- initialise an array with 10 doubles.
       loop arr 0 9                -- selfmade loop over elements
       arr <- mapArray (+1) arr    -- a map over elements
       elems <- getElems arr
       putStrLn $ "Array elements: " ++ (show elems)

    Isto 14:43, 26 November 2006 (UTC)