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For efficiency, operates on streams of strict ByteString chunks
IsStream t => t m ByteString) rather than directly on streams of Word8.
The chunkStream function is useful for generating an input stream from a
import Streamly import qualified Streamly.Prelude as S import Streamly.Csv (decode, encode, chunkStream) import System.IO import qualified Data.Csv as Csv import qualified Data.ByteString as BS import Data.Vector (Vector) main = do h <- openFile "testfile.csv" ReadMode let chunks = chunkStream h (64*1024) recs = decode Csv.HasHeader chunks :: SerialT IO (Vector BS.ByteString) withFile "dest.csv" WriteMode $ \ho -> S.mapM_ (BS.hPut ho) $ encode Nothing recs