dons: > briqueabraque: > > Hi, > > > > I need to edit big text files (5 to 500 Mb). But I just need to > > change one or two small lines, and save it. What is the best way to do > > that in Haskell, without creating copies of the whole files? > > > > I'd think maybe a lazy bytestring would be ok. > > Something like: > import Data.ByteString.Lazy.Char8 > B.putStr . B.unlines . B.map edit . B.lines =<< B.getContents > > in the darcs version of Data.ByteString, here, > http://www.cse.unsw.edu.au/~dons/fps.html > Let me know how you go, it would make a good benchmark.
Oh, of course, if you actually don't want to copy the file, you'll need to strictly read the input file, in order to write over it safely. - Don _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
