[Haskell-cafe] IO Help

Daniel Fischer daniel.is.fischer at web.de
Thu May 8 09:19:53 EDT 2008

Am Donnerstag, 8. Mai 2008 14:59 schrieb Mark Wallsgrove:
> Thank you very much for your fast response!
> Ok, that is now changed, but everything else in my program is expecting
> Catalogue without IO. Is there a way to change IO Catalogue into Catalogue?
Not a recommendable way. But there's no need to, your programme will probably 
look like

main = do
	args <- getArgs
	let realArgs = parseArgs args
	catalogue <- loadData
	doSomething realArgs catalogue

and doSomething might e.g. construct an updated catalogue and write it to a 

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