interact :: (String -> String) -> IO () is a very handy function for ghc -e, e.g.
ghc -e 'interact $ lines . map (show . (*2) . read) . unlines' will multiply the number on every line by 2. (interact takes a function which maps from entire input to entire output) On 05/11/2007, Graham Fawcett <[EMAIL PROTECTED]> wrote: > On Nov 5, 2007 1:46 PM, Maurício <[EMAIL PROTECTED]> wrote: > > Hi, > > > > Is there a way to run 'ghc -e' taking input > > from standard input? I would like to use it > > in a pipe. > > It seems to me that you can use getContents, et. al., as you would > from any other Haskell program: > > $ echo hello there mauricio | ghc -e "print =<< (Control.Monad.liftM > (reverse . words)) getContents" > ["mauricio","there","hello"] > > G > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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