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On 03/16/2018 11:28 PM, David Storrs wrote:
I'm noticing that when I store jsexpr?s into PostgreSQL 10 I end up with
them as strings, not as actual JSONB data. I've read the docs and tried
every combination of typecasting / methods of writing that I can think
of but nothing ends up working. C
I suspect this may be an issue with your PostgreSQL schema. Racket uses the
`jsexpr?` type for both the types "JSON" and "JSONB" at the PostgreSQL
level.[1] Can you confirm that your column is defined with the "JSONB" type?
[1]
http://docs.racket-lang.org/db/sql-types.html#%28part._postgresql-type
I'm noticing that when I store jsexpr?s into PostgreSQL 10 I end up with
them as strings, not as actual JSONB data. I've read the docs and tried
every combination of typecasting / methods of writing that I can think of
but nothing ends up working. Can anyone point me to the right way?
--
You re
> On Mar 16, 2018, at 2:38 PM, Kevin Forchione wrote:
>
> Hi guys,
> I’ve noticed that struct-copy doesn’t appear to work when fields are defined
> with #:auto. So this leads to my question, which may not be answerable since
> it would presumably be used to fix struct-copy, but is there a wa
Hi guys,
I’ve noticed that struct-copy doesn’t appear to work when fields are defined
with #:auto. So this leads to my question, which may not be answerable since it
would presumably be used to fix struct-copy, but is there a way to retrieve a
list of struct fields for a struct? I have a feelin
As far as I understand, your ‘length-ok’ is implementing in Redex the ‘(<=
(length ___) ___)’ I had in my ‘side-condition’. But I can’t see how it
addresses two important features from my original code: (1) ‘k’ is
parameterizable, and its value influences whether a list is valid or not;
and (2)
On 16/03/18 13:52, Matthew Flatt wrote:
>> But even more surprised that given I only open one
>> open (the null) port for stdout and stderr I still get the system error.
>
> There's no avoiding an OS-level file descriptor for each of stdin,
> stdout, and stderr. Even if you supply an existing fi
If you want to stay inside redex-land, you have to do something like the
code below, where you use typesetting to turn uses of length-ok (in other
relations) into something like "#(l) = k".
hth,
Robby
#lang racket
(require redex)
(define-term k 3)
(define-language L)
(define-judgment-form L
At Fri, 16 Mar 2018 13:30:07 +0100, "'Paulo Matos' via Racket Users" wrote:
> I was playing around with places and decided to try to spawn 200 places.
> [...]
> Is there anything I can do to avoid this? Which files are actually being
> created? And 200 is not a very large number...
This is a limit
> But I clearly don’t get what you really want so I will abandon this one.
>
> Good luck — Matthias
>
Thanks for trying, talking to you is always instructive 😀
For people that hasn’t abandoned this one: I decided to bite the bullet and
thread the ‘metaparameter’ in my definitions. This will
Hi,
I was playing around with places and decided to try to spawn 200 places.
#lang racket
(define (kaboom)
(define null-port (open-output-nowhere))
(define ps
(for/list ([i (in-range 200)])
(define-values (p _1 _2 _3)
(place* #:in #f
#:out null-port
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