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Re: sending list
Re: sending list
12 Sep 2001 16:32:10 +0200
Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7
Alex Shinn <address@hidden> writes:
> Manuel> I don't understand how useful can be a "newly created
> Manuel> output port" on which you have no control (is a socket, a
> Manuel> file? which one?).
> Neither, it's just an output port. In Martin's example the port is
> passed as the argument to the (lambda (s) ...) expression. Inside the
> procedure he writes to the s port, and when the procedure is done, all
> the output to s is collected and returned by the c-w-o-s expression as
> a single string.
Ok! so this use of c-w-o-s is just to convert a list to a string. It's
sad that the name `list->string' is already used by R5RS because IMHO
what is done here with c-w-o-s is the *true* behaviour of
> Manuel> Anyway, is it possible with this function and
> Manuel> `call-with-input-string' to send a s-expression (as a
> Manuel> string) over socket, retrieve it on the server side and
> Manuel> evaluate it?
> Sure, you just want to convert the s-expression to a string somehow.
> Scheme will also do this for you automatically if you use
> (write '(define a 8) port)
> In this sense read and write are opposites, and anything you can read
> you can write. The converse is not true, there are things like ports
> themselves and smobs which have a written representation but cannot be
> read back in.
It works great! So now I can *easily* migrate my code everywhere I want to
... in fact everywhere there's a guile server launch.
I think it's time to remove all of these complex OSes from our
machines and simply install some guile servers ;-)
Jake:"See those berries? That's our breakfast! See that stream? That's
our drinking water!"
Daria:"See that skeleton? That's our future."
-From "The Teachings Of Don Jake."