You may need to call `(flush-output)` after printing to ensure the buffer is
flushed. The library racket/place/distributed provides some convenience
wrappers like printf/f and displayln/f which print and immediately flush the
output port.
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Hello all,
The videos for RacketCon are finally up.
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~Leif Andersen
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For clarity, that line where I call:
(make '() req)
Is the one that's failing because '() is clearly not a "connection".
Thanks!
Luke
On Fri, Nov 11, 2016 at 2:18 PM, Luke Bayes wrote:
> Disclaimer: I'm a long-time software engineer, but very new to Lisp/Scheme
> and even newer to Racket.
Disclaimer: I'm a long-time software engineer, but very new to Lisp/Scheme
and even newer to Racket. Please bear with me!
I have a basic web-server working that has handlers configured for
different routes. I can return markup for GET requests and process params
on POST requests with different han
The package Racquel creates a neat DB-agnostic interface that you can use with
many different types (basically everything in the db package). You might have
to get creative if you want to use mongo, though there is a mongo package
around. You may be able to create a fork or a pull request to Rac
On Nov 11, 2016, at 10:16 AM, dear chap wrote:
> Hi MB
> That did the trick. Using the macro stepper didnt help much but after
> running the (message-syntax ...) I see the message object getting populated
> correctly with field objects. Why is there a difference ?
`quote` converts its input
Well I am using DB liberally so to be clear I am thinking there could be
several possible data store formats that I deal with out the gate.
1. sqlite
2. mysql
3. postgresql
4. mongo
5. text fixed width
6. cvs
I know it seems crazy but right now part of what I am dealing with is a
lot of formats I
I think the first question is "what are you trying to achieve?" What
differences should the system demonstrate if it's hooked to MySQL vs
PostgreSQL?
Personally, I just pass connection objects around. As long as you stick
with standard SQL this is all that's required to make your system work wit
Hi MB
That did the trick. Using the macro stepper didnt help much but after running
the (message-syntax ...) I see the message object getting populated correctly
with field objects. Why is there a difference ?
Thanks
p.s pollen is the reason I started learning Racket. Thanks !!!.
On Frida
On Nov 11, 2016, at 7:24 AM, dear chap wrote:
> (define-syntax (message-syntax stx)
> (syntax-parse stx
> ([_ name field:field_binding ...]
> #`(begin
>(define message-inst (message 'name '((field-syntax field) ...)
>
>
> I want the message object to contain the nam
Hi
I'm writing a macro similar to this
(struct field (x y z) )
(struct message (name field-list))
(define-syntax (field-syntax stx)
(syntax-parse stx
([_ field:field_binding]
#`(begin
(field 1 2 5)
(define-syntax (message-syntax stx)
(syntax-parse stx
([_ na
Thanks to whoever wrote Racket's nixpkgs derivation. I have found that
nix is a great development tool. With nix-shell:
* You set declare an environment, commit it to your repo, and all devs
are on the same page.
* When dealing with ISSUEs you can easily switch between racket versions.
* You can
ICPE 2017
8th ACM/SPEC International Conference on Performance Engineering
Sponsored by ACM SIGMETRICS, SIGSOFT, and SPEC RG
L'Aquila, Italy
April 22-26, 2017
I am trying to figure out the best way to do this and granted I am not sure my
architecture is the most sane or sensible way to handle it. I am trying to
build my DB interface and I want to allow the system to deal with numerous
types of data stores. So I have a config file that is read and ge
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