It reads from standard input so you either have to type some lines in and hit Ctrl-D or pipe a file to standard input using the shell. On May 19, 2014 4:17 PM, "Pierre R" <[email protected]> wrote:
> > > On Monday, May 12, 2014 4:27:37 AM UTC+2, Gabriel Gonzalez wrote: >> >> Earlier today I wrote up a fold for somebody else for retrieving the >> last N elements of a sequence. That's the non-trivial bit: >> >> http://lpaste.net/103997<http://www.google.com/url?q=http%3A%2F%2Flpaste.net%2F103997&sa=D&sntz=1&usg=AFQjCNGn-hu-CTTeuqPcUTfgK2xhH7QjHg> >> >> > I am almost ashamed to ask but I fail to see why the `main` (in the above > lpaste) does not output a thing > > while it works as expected with a file > > main = withFile "test" ReadMode $ \hIn -> do > ls <- purely fold (lastN 5) $ P.fromHandle hIn > runEffect $ for (each ls) (lift . putStrLn) > > > -- > You received this message because you are subscribed to the Google Groups > "Haskell Pipes" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > -- You received this message because you are subscribed to the Google Groups "Haskell Pipes" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected].
