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Module: IO
Function: hIsWritable
Type: Handle -> IO Bool
Description: The functions hIsOpen, hIsClosed, hIsReadable, hIsWritable and hIsSeekable return information about the properties of a handle. Each of these returns True if the handle has the specified property, and False otherwise.
Related:

Example 1
Program source: 

import IO

main = do x <- openFile "/tmp/foo.txt" WriteMode
          y <-hIsWritable x
          print y

Output: True

Example 2
Program source: 

import IO

main = do x <- openFile "/tmp/foo.txt" ReadMode
          y <-hIsWritable x
          print y

Output: False




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