The trouble, sadly, is that this grammar is ambiguous. In
(for ([(x y) s])
)
should (x y) be parsed as a single match pattern or as two binders for a
two-valued sequence (such as one produced by in-hash, for example)? You could
make it unambiguous in various ways, such as by
I'm porting a web application from Ruby/Rails to Racket, and I'd like
something to manage the Racket server processes.
In the Ruby world, I'm currently using Unicorn (
https://en.wikipedia.org/wiki/Unicorn_(web_server) ) prior to that I used
Nginx Passenger (
Maybe you could have something like (in-match ...) ?
On Fri, Nov 23, 2018 at 4:54 PM Alexis King wrote:
> The trouble, sadly, is that this grammar is ambiguous. In
>
> (for ([(x y) s])
> )
>
> should (x y) be parsed as a single match pattern or as two binders for a
> two-valued
I actually have an experimental `in-match` macro, analogous to `in-value`:
https://docs.racket-lang.org/adjutor/Experimental.html#(form._((lib._adjutor%2Fmain..rkt)._in-match))
One open question with my version (and one of the reasons I consider this
experimental) is what should be done if one of
On 11/23/2018 4:38 PM, Philip McGrath wrote:
I'm not familiar with Ruby, so this is just some general information.
The Racket web server already supports concurrency with its built-in
green threads, so handling one request won't block the concurrent
handling of another. (Not all languages'
I'm not familiar with Ruby, so this is just some general information.
The Racket web server already supports concurrency with its built-in green
threads, so handling one request won't block the concurrent handling of
another. (Not all languages' built-in web servers do this; I don't know
about
> The trouble, sadly, is that this grammar is ambiguous. In
>
> (for ([(x y) s])
> )
>
> should (x y) be parsed as a single match pattern or as two binders for a
> two-valued sequence (such as one produced by in-hash, for example)?
Unless I'm being dense, (x y) isn't a valid single
I'm not sure if this was clear from what I said earlier, but I use the
Racket web server without anything in front of it. In fact, Racket does SSL
termination and serves as a proxy for non-Racket services. We have been
completely satisfied with its performance and reliability.
-Philip
On Sat,
Depends on what `x` is, both symbolically and in terms of binding:
(for/first ([(list _) #hash([(a) . 1])])
list)
(define-match-expander x
(syntax-rules ()
[(_ pat) (list pat)]))
(match '(ok)
[(x v)
v])
-Philip
On Fri, Nov 23, 2018 at 11:41 PM Greg Hendershott
wrote:
> > The
In my experience a Racket web server will just stubbornly continue to
work for months at a time, if you let it.
(Reminds me of the aviation joke. In the future, cockpits will have
just one human pilot and a dog. The dog is there to bite the human if
they try to turn off the autopilot.)
I have a
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