-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 20/06/11 18:00, Dmitri O.Kondratiev wrote:
Hi, What is right way to do conditional IO? For example, I need to write to file errors only in case they exist, otherwise my function should do nothing:
handleParseErrors errors | (not . null) errors = writeFile "parse-errors.txt" (show errors) | otherwise = ?
What should be an 'otherwise' case ?
How about `return ()'? -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJN/v/hAAoJEDiWqExGnQ/Q7VQP/js4XZc92bHeM8f/ErQeQ4LT UwINtt8WFtTWevQtwfO6wNc96CVcjnybb2SwPqnQMISnb4EPc9RvfFz24FTBneQ9 d7MD44uNnW1wAgY8VKaQQJ2v5VVrUd8Gq/m0toUKuefaT9yKMVIG/EeEPaLEUe3y tJUyykCXcUpTzllDyk9kjb/1Og9CNWD+y4rdrWSldWCwgIPMHE2nwNOvs6RquPDQ Om5eFdk2AFwAgDl1FIR2EiuWdQ3jUVPaDsHC0L24fvCeC/TA6AoHmC0panCYCchc 8nEruqwmiA/nU+Uh1Z6SWEicBeuWcXSk6iPuRYM7xU9dDLKFNEHAvCTLYdg2+zwR sovOOYrOEnQ8FDwyZGXC7atxrNGl/nk09Q2RNkXryGo/nNdkUG0AuvoXI5gn8Q6v 7mZiXJr2AbUFqcDA4qXOj8IwddtU5hvwqkGj7xSqCck9sHWWXjZLrJqFH+mW8oMU 8rHVkSpMEFH0vbfvvgRMqzdcpnuDKa4/t+o8wvJy/lr9pdhP2o2azpxvb6NFlDpP dgDwnOe/v8c9Mz7tqs41k94SYTVk2lNpsoXShVoB9tg0EttHKjDNM2ykGJl90Hcf 6vJUGEyNqE78s6qMxiAauxatlQdkw40j2ifcriElj5U7cogpZUGxnb/RODsl0rqn BHPJVkHC/iEQ+t/4lfaT =HGbC -----END PGP SIGNATURE-----