Re: [racket-users] New module log-bracketed; should probably be something else

[jackh...@gmail.com]

This looks quite a bit like you're trying to implement tracing, which is 
like logging, but instead of emitting messages associated with *points* in 
time, you emit messages for *ranges* of time. Rust has an excellent library 
 for tracing. Perhaps that will 
provide some good inspiration?

On Friday, September 3, 2021 at 8:30:18 AM UTC-7 david@gmail.com wrote:

> On Thu, Sep 2, 2021 at 5:32 PM Sorawee Porncharoenwase <
> sorawe...@gmail.com> wrote:
>
>> Thoughts:
>>
>>- Perhaps the logger should be optional. The default value would be 
>>(current-logger). 
>>- The event name (like on-complete) could also be optional. The 
>>default would be the source location of the macro invocation site 
>>- Instead of “time: ~a”, I think it would be nice to support many 
>>“pairs”, which are formatted like raise-arguments-error. 
>>
>> Example:
>>
>> (define (on-complete x)
>>   (log-test-debug "I'm in on-complete")
>>   x)
>>
>> (with-log ()
>>   1)
>>
>> (with-log (#:logger test-debug
>>#:msg "on-complete"
>>["time" (current-seconds)])
>>   (on-complete (person 'bob)))
>>
>> would output:
>>
>> test: entering test.rkt:5:1
>> test: exiting test.rkt:5:1
>> result: 1
>> 1
>> test: entering on-complete
>> time: 123
>> test: I'm in on-complete
>> test: exiting on-complete
>> time: 124
>> result: (person 'bob)
>> (person 'bob)
>>
>>
>>
> First of all, thank you.  I like the idea of the event name being optional 
> and the logger defaulting but I'm not keen on the syntax.  It's very 
> verbose for something that might occasionally be wrapped around a single 
> line of code. The raise-arguments-error formatting would be a nice default 
> but I prefer to give the option to use a format string if you want 
> something different.
>
>
>> On Thu, Sep 2, 2021 at 2:06 PM Martin DeMello  
>> wrote:
>>
>>> I do like the second form better, especially since the actual code being 
>>> run is not obscured by simply being the last argument to a long log 
>>> function.
>>>
>>
> Cool.  I'll move towards that.
>
>
>>> martin
>>>
>>> On Thu, Sep 2, 2021 at 1:55 PM David Storrs  wrote:
>>>
 I often find that for debugging I want to see a log message saying "I'm 
 about to do X" followed by X followed by "I'm done with X" and I want it 
 to 
 return the result of X.

 I wrote this macro and posted it to the package server:  
 https://pkgs.racket-lang.org/package/log-bracketed

 In retrospect, the syntax is bad and I should change it.  Can anyone 
 suggest something better?

   (define (on-complete x) (log-test-debug "entering on-complete") x)
   (struct person (name) #:transparent)

   (log-bracketed test-debug "on-complete" "time: ~a" (current-seconds) 
 (on-complete (person 'bob)))
   (log-bracketed test-debug "on-complete" "" "no user-specified logging 
 information")

 Spits out:


 test: about to on-complete. time: 1630611613
 test: entering on-complete
 test: after on-complete. time: 1630611613. result: (person 'bob)
 (person 'bob)
 test: about to on-complete
 test: after on-complete. result: "no user-specified logging information"
 "no user-specified logging information"


 The problem is that this looks like it's a simple logging message when 
 in fact it's real code that should not be ignored.  I'm trying to think of 
 a better way to do it...maybe something like this?:

   (with-bracketing-logs ([test-debug "on-complete" "time: ~a" 
 (current-seconds)])

  (on-complete (person 'bob))



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[racket-users] Announcing Fission Flare, a falling block video game

[Ryan Kramer]

I've just released v0.1 of a falling block video game: 
https://github.com/default-kramer/fission-flare It draws a lot of 
inspiration from Dr Mario but I don't like to advertise that since my game 
has plenty of unique ideas. And although the patent on Dr Mario has 
expired, I'm not a lawyer and I don't want to invite trouble.

The game is 100% Racket, most of it Typed. The graphics are all done using 
pict. Perhaps I'll start a blog and write up some of the more interesting 
things I learned, but not today. 

Warning - it can be pretty addicting! Well over 90% of my "development" 
time was just me playing the game.

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Re: [racket-users] [ANN] Introducing "social" contracts

[Nathaniel W Griswold]

The changes look good, i like the idea of this.

> On Aug 25, 2021, at 10:59 AM, Siddhartha Kasivajhula  
> wrote:
> 
> Hello again folks,
> I recently migrated one of my repos to use social-contract, and thought I'd 
> share the before/after as an example to illustrate what the package does:
> 
> https://github.com/countvajhula/seq/commit/c959be577448640e00ab7015bdaddabb7f8b49ba?branch=c959be577448640e00ab7015bdaddabb7f8b49ba=split

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[racket-users] Re: Writing to serial port?

[Zeta Convex]

Ah, OK. It seems fairly straightforward:

(system "stty -F /dev/ttyACM0 115200 crtscts")

(define out 0)
(set! out (open-output-file "/dev/ttyACM0" #:mode 'binary #:exists 'append))
;(set! in  (open-input-file  port-name #:mode 'binary))
(file-stream-buffer-mode out 'none)
(write-byte whatever out)

(close-output-port out)

On Thursday, 23 September 2021 at 18:31:53 UTC+1 Zeta Convex wrote:

>
> How do I write to a serial port? I'm on Linux, and want a baud rate of 
> 115200.
>
> I'm new to Scheme. I can't seem to find a library to do what I want.
>

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[racket-users] Writing to serial port?

[Zeta Convex]

How do I write to a serial port? I'm on Linux, and want a baud rate of 
115200.

I'm new to Scheme. I can't seem to find a library to do what I want.

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Re: [racket-users] Autumn Lisp Game Jam 2021

[Stephen De Gabrielle]

There is a collection of links that may be useful for games at
https://github.com/racket/racket/wiki/Game-Development

And don’t forget 2htdp/universe can be used from #lang racket

Bw
Stephen

On Thu, 23 Sep 2021 at 09:16, Bruce O'Neel  wrote:

>
> This might interest some of you...
>
> Autumn Lisp Game Jam 2021 - itch.io
> 
>
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> 
> .
>
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[racket-users] Autumn Lisp Game Jam 2021

[Bruce O'Neel]

This might interest some of you...

Autumn Lisp Game Jam 2021 - itch.io
[https://itch.io/jam/autumn-lisp-game-jam-2021]

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