On Tue, Sep 1, 2015 at 10:03 AM, Ben wrote:
> Hi,
>
> I'm trying to build a web application using Racket. But I don't understand
> continuations yet. I think the package is capable of writing simple
> applications without continuations. So
>
> 1. Which part of the web-server package should I stay away from if I don't
> want to use continuations?
The web-server/servlet module
> 2. Why not separate the basic functionalities of handling requests and
> sending responses out from the package? I think the advanced concepts like
> continuations will scare some beginners like me away.
It is divided in the way you suggest. The only things that require
continuations are the functions in web-server/servlet, all other
functions and modules do not use them.
> 3. I'm actually interested in continuation. Are there any resources to
> learn about it?
The tutorial discusses them: http://docs.racket-lang.org/continue/index.html
> 4. URLs like 'standalone.rkt;(("k" . "(1 3 49600023)"))' is not pretty in my
> eye. Is it possible to make it "standalone.rkt" if I'm programming in the
> continuation style?
Yes, but the continuation encoding has to be somewhere in the request.
It could be in the URL (the default), it could be in a hidden form
field, in POST data, in an HTTP header, etc. For everything other than
the URL, you need to have special HTML application support to put it
in the right spot.
Jay
> Thanks,
> Ben
>
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--
Jay McCarthy
http://jeapostrophe.github.io
"Wherefore, be not weary in well-doing,
for ye are laying the foundation of a great work.
And out of small things proceedeth that which is great."
- D&C 64:33
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