On Sun, Dec 11, 2011 at 4:19 PM, dokondr
Hi, I got quite used to a sequence providing simple data persistence : 1) Store my data to a file: writeFile fileName (show someData)
2) Some time later read this data back: line <- readFile fileName let someData = read line :: SomeDataType
I can't help you with your question, but I suggest using safecopy [1] even for simple cases. It's *much* faster and also safer. Also, it's easy to use, just use L.writeFile fileName $ S.runPutLazy $ safePut someData and ret <- S.runGetLazy safeGet <$> L.readFile fileName case ret of Left err -> print err Right someData -> ... where import Control.Applicative ((<$>)) import qualified Data.ByteString.Lazy as L -- [2] import qualified Data.Serialize.Get as S -- [3] import qualified Data.Serialize.Put as S -- [4] Cheers, [1] http://hackage.haskell.org/package/safecopy [2] http://hackage.haskell.org/packages/archive/bytestring/0.9.2.0/doc/html/Data... [3] http://hackage.haskell.org/packages/archive/cereal/0.3.4.0/doc/html/Data-Ser... [4] http://hackage.haskell.org/packages/archive/cereal/0.3.4.0/doc/html/Data-Ser... -- Felipe.