---------- Forwarded message ----------
From: deepak verma <deepakverma14021...@gmail.com>
Date: Wed, Apr 10, 2013 at 4:53 AM
Subject: Re: What is racket/cmdline?
To: Danny Yoo <d...@hashcollision.org>
next time i will remember to write the subject
and actually i only know about graphical interface..
and as far as documentation is concerned ... i read it approximately
3-4 hrs daily but..
it is really hard to grasp things out of it.
let me show u a code.
(define (serve port-no state)
(define listener (tcp-listen 1985 5 true "10.4.233.9"))
(define (loop)
(accept-and-handle listener state)
(loop))
(define t (thread loop))
(lambda ()
t
(kill-thread t)
(tcp-close listener)))
(define (accept-and-handle listener state)
(define-values (in out) (tcp-accept listener))
(thread
(lambda ()
(handle in out state)
(close-input-port in)
(close-output-port out))))
(define (handle in out state)
(begin (display state out)
(flush-output out)))
;;;;;here state is any string i would like to send .
i am trying to read the output from other computer using the tcp-connect.
but it is not showing output until i run the listner console again.
for tcp-connect
my code is :
(define-values (sin sout) (tcp-connect "10.4.233.9" 1985))
and i write (read sin )
in console .
On Tue, Apr 9, 2013 at 11:07 PM, Danny Yoo <d...@hashcollision.org> wrote:
>
> Deepak, please place a useful subject line on your emails. Right now,
> your emails have no subject line, which makes it difficult for people
> to judge whether or not the question is interesting to them. I'm
> changing the subject line to "What is cmdline?".
>
> ---
>
> It's a bit hard to answer this question without you telling us some
> background on what you already know. Are you already familiar with
> the command-line interface of certain operating systems, or are you
> only familiar with a graphical user interface?
>
>
> If there's a function you don't quite know, DrRacket provides fairly
> extensive documentation if you use your mouse and right-click the name
> of the function.
>
> In this case, command-line has documentation here:
>
> http://docs.racket-lang.org/reference/Command-Line_Parsing.html
>
> It's a library to manage some of the messiness of parsing command line
> arguments to a program. When a program is executed from the command
> line (http://docs.racket-lang.org/guide/scripts.html), the user can
> provide additional command line arguments to provide initial inputs
> into the program.
>
>
> These arguments are passed as a parameter to the program,
> current-command-line-arguments,
>
>
> http://docs.racket-lang.org/reference/runtime.html#%28def._%28%28quote._~23~25kernel%29._current-command-line-arguments%29%29
>
> but we would like to deal with that vector of strings in a way
> consistent with other command-line tools. e.g. provide a good
> "--help", print good error messages when the user passes bad
> arguments, etc. The racket/cmdline library, and the command-line
> function that it provides, are tools to help make these convenient to
> implement.
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