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Module: Directory
Function: doesDirectoryExist
Type: FilePath -> IO Bool
Description: The operation doesDirectoryExist returns True if the argument file exists and is a directory, and False otherwise.
Related:

Example 1
Program source: 

import Directory 

main = aaa "/tmp/FOO"

aaa ddd = do createDirectory ddd
	     d <- doesDirectoryExist ddd
	     print d
	     removeDirectory ddd
	     d <- doesDirectoryExist ddd
	     print d

Output: True

Output: False