On 2004-10-25, Peter Simons <[EMAIL PROTECTED]> wrote: > John Goerzen writes: > > > Now, if [I read with hGetContents h], then the first read > > I try to make using it works, but subsequent ones don't, > > since the first one made it half-closed already. > > Maybe I misunderstood something ... but why do you need to > read from the stream multiple times after calling > hGetContents? The function returns the _entire_ (lazily > evaluated) input stream, there is no need to read again. You > already _have_ everything.
Because I'd have to use a state monad or something to chop off the top of the list each time I read from it. This is a FTP client module, so, for instance, you might see this session: cwd h "/pub/linuc" nlst h Nothing etc. Each command sends something and reads a reply. "h" holds an instance of that data structure I posted. If I just try to read from the list during each command, I would just read the same (first) response over and over again. Or, I'd have to store a position (which also requires a state monad), which would lead to wasting memory keeping all that stuff around. _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
