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-- If you're on a Unix-like system, look through the documentation for the
-- System.Posix.Files module, and see if you can find a replacement for the
-- doesNameExist function.
-- The replacement is the fileExist function that checks for existence of both
-- regular file and directories.
ghci> :module + System.Posix.Files
ghci> fileExist "nonexistent_file"
False
-- Regular file
ghci> fileExist "8_b_2.txt"
True
-- Directory
ghci> fileExist "../ch08/"
True
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