UTF-8
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(question - what about other string encodings?) |
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| - | The simplest solution seems to be to use the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/utf8-string utf8-string package] from Galois. It provides a drop-in replacement for System.IO | + | The simplest solution seems to be to use the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/utf8-string utf8-string package] from Galois. It |
| + | provides a drop-in replacement for System.IO | ||
| + | |||
| + | ''What about other string encodings?'' | ||
| + | |||
| + | == Example == | ||
| + | If we use a function from System.IO.UTF8, we should also hide the equivalent one from the Prelude. (Alternatively, we could import the UTF8 module qualified) | ||
| + | |||
| + | <haskell> | ||
| + | > import System.IO.UTF8 | ||
| + | > import Prelude hiding (readFile, writeFile) | ||
| + | > import System.Environment (getArgs) | ||
| + | </haskell> | ||
| + | |||
| + | The readFile and writeFile functions are the same as before... | ||
<haskell> | <haskell> | ||
| - | + | > main :: IO () | |
| - | + | > main = | |
| + | > do args <- getArgs | ||
| + | > mapM_ reverseUTF8File args | ||
| - | + | > reverseUTF8File :: FilePath -> IO () | |
| - | + | > reverseUTF8File f = | |
| - | + | > do c <- readFile f | |
| - | + | > writeFile (f ++ ".rev") $ reverseLines c | |
| + | > where | ||
| + | > reverseLines = unlines . map reverse . lines | ||
</haskell> | </haskell> | ||
Current revision
The simplest solution seems to be to use the utf8-string package from Galois. It
provides a drop-in replacement for System.IO
What about other string encodings?
Example
If we use a function from System.IO.UTF8, we should also hide the equivalent one from the Prelude. (Alternatively, we could import the UTF8 module qualified)
> import System.IO.UTF8 > import Prelude hiding (readFile, writeFile) > import System.Environment (getArgs)
The readFile and writeFile functions are the same as before...
> main :: IO () > main = > do args <- getArgs > mapM_ reverseUTF8File args > reverseUTF8File :: FilePath -> IO () > reverseUTF8File f = > do c <- readFile f > writeFile (f ++ ".rev") $ reverseLines c > where > reverseLines = unlines . map reverse . lines
