Re: [ANN] New blog post: Lisp's grandfather paradox

2024-07-30 Thread Raoul Duke
For me, sexprs are not fun for math, actually.

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Re: Emacs-cider

2020-03-13 Thread Duke Normandin
Informative article-thanks! I’ve tried both ‘cider-connect’ & ‘cider-jack-in. 
Both throw the error message. I’m having to use ‘nightcode’ to get going with 
my clojure test-drive. 

Sent from my iPhone

> On Mar 13, 2020, at 5:50 PM, Matching Socks  wrote:
> 
> 
> How cider-nrepl gets loaded, all depends. The manual has something to say 
> about it, at https://docs.cider.mx/cider/basics/up_and_running.html
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Re: Emacs-cider

2020-03-13 Thread Duke
WARNING: CIDER requires cider-nrepl to be fully functional. Some features 
will not be available without it!
 More information.
user>

GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)  of 2019-08-29

;; Connected to nREPL server - nrepl://localhost:51889
;; CIDER 0.24.0 (India), nREPL 0.6.0
;; Clojure 1.10.0, Java 1.8.0_241


On Friday, 13 March 2020 12:58:52 UTC-6, Alex Miller wrote:
>
> It would probably help to include any error information for someone to 
> learn more about the problem.
>
> On Friday, March 13, 2020 at 1:54:40 PM UTC-5, Duke wrote:
>>
>> The emacs-cider combo chokes with an error to the effect that cider-nrepl 
>> could not be loaded.
>> I'm on a Win10 box. Would someone point m to a possible solution please. 
>> Thx.
>>
>

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Re: [ANN] Clojure 1.10.2-alpha1

2020-03-13 Thread Duke Normandin
Okay- Got it! Thx. 

Sent from my iPhone

> On Mar 13, 2020, at 12:58 PM, 'Alex Miller' via Clojure 
>  wrote:
> 
> 
> Generally, you don't explicitly download it at all - you should just change 
> your dependency in your project.clj to use 
> 
> [org.clojure/clojure "1.10.2-alpha1"] 
> 
> and then leiningen will download it for you into your local Maven repository 
> (usually in ~/.m2/repository).
> 
> 
>> On Friday, March 13, 2020 at 1:54:40 PM UTC-5, Duke wrote:
>> Thanks for the  heads up!  Need some advice though - if I may. Being a 
>> clojure/lein newbie, I'm not sure how to tell Lein that I've just DLed the 
>> latest, bleeding-edge version of clojure.  And while I'm at it, to what 
>> directory on my Win10 box should I have DLed 1.10.2-alpha1 to?  Thanks in 
>> advance!
> 
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Emacs-cider

2020-03-13 Thread Duke
The emacs-cider combo chokes with an error to the effect that cider-nrepl 
could not be loaded.
I'm on a Win10 box. Would someone point m to a possible solution please. 
Thx.

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Re: [ANN] Clojure 1.10.2-alpha1

2020-03-13 Thread Duke
Thanks for the  heads up!  Need some advice though - if I may. Being a 
clojure/lein newbie, I'm not sure how to tell Lein that I've just DLed the 
latest, bleeding-edge version of clojure.  And while I'm at it, to what 
directory on my Win10 box should I have DLed 1.10.2-alpha1 to?  Thanks in 
advance!

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Re: Two Senior Clojure developers based in Moscow looking for the interesting challenges and possibility for remote work

2018-08-03 Thread Raoul Duke
what happened after they, "walked into a bar"?

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Re: Port graphs: What would Rich Hickey do?

2018-01-01 Thread Raoul Duke
€0.02 i like option #3, i think it would be possibly nice for edges to be
named based on the ports they connect.

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Re: State & GUIs

2017-12-02 Thread Raoul Duke
random tangential food for thought:
https://groups.google.com/forum/#!searchin/elm-discuss/Discussion$20on$20saying$20farewell$20to$20FRP$20|sort:relevance/elm-discuss/6U74_aNXC04/UY8dIIh-CQAJ

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was Re: ANN: Orchestra, complete instrumentation for clojure.spec

2017-04-06 Thread Raoul Duke
I am writing to ignorantly sincerely ask how spec + Orchestra compares to
other statically typed out of the box JVM languages. What are the succint
wins over not Scala shudder but eg Kotlin Ceylon, heck Frege, et. al.?

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Re: complex made simple?

2016-10-14 Thread Raoul Duke
we need the TRIZ of software :-/

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Re: Multi-OS Engine | Intel(R) Software

2016-08-09 Thread Raoul Duke
Whatever happened to Defrac, anyway?

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RE: Frustrations so far

2016-07-22 Thread Raoul Duke
Unfortunately, dynamically typed most often means what you are experiencing, as 
far as I know. Python, JavaScript, Scheme, Lua, etc. all have something like 
NPE that can happen at any random time, it feels like, no?

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Re: Having trouble doing what I want using macros, is there a better way?

2016-06-10 Thread Raoul Duke
My $0.02 is only resort to macros when all else has failed. Can just higher
order functions and composition and injection get you closer to what you
want?

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Re: I knew that primitives were better, but this is ridiculous

2016-05-12 Thread Raoul Duke
On Thu, May 12, 2016 at 3:11 PM, Nicola Mometto  wrote:
> Fair enough, but in this case types wouldn't really have helped: the author 
> did use `Double` type hints, mistakenly assuming that would make its code use 
> primitive types, which it does not since `Double` is boxed and not primitive.
> Clojure already has compile time warnings about boxed math that would've 
> helped in this case if turned on, without any need for types: try compiling 
> OP's code after running `(set! *unchecked-math* :warn-on-boxed)`

Thanks for the details re: double. Apologies for being annoyed/ing.

Next up: something like `(set! *unchecked-laziness* :warn-on-lazy)? We
can relive the ignominious history of "$!" in Haskell.

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Re: I knew that primitives were better, but this is ridiculous

2016-05-12 Thread Raoul Duke
On Thu, May 12, 2016 at 2:59 PM, Nicola Mometto  wrote:
> Static types wouln't have helped at all in this case. Types are about 
> correctness, not performances. This comment was needless

Here I thought maybe knowing when something was or was not something
could have been useful in, you know, making the code (benchmarks in
this case) actually do what the author wanted it to be doing. Silly
me.

I will always have my fingers crossed for core.typed. :-)

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Re: I knew that primitives were better, but this is ridiculous

2016-05-12 Thread Raoul Duke

y'know, if only there were something, i dunno, something static that
could you know have some, i dunno, 'types' that would help annotate
things such that at maybe compile time, we'd know if the things we're
handling are lazy or boxed or whatever-else or not.


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Re: Addressing Matthias Felleisen's concerns?

2016-05-09 Thread Raoul Duke
(Did he mention Wadler? Probably. http://lambda-the-ultimate.org/node/2538)

I have it from friends who have used TR "in anger" that it is not really a
win. My own experience with other things, e.g. the typed stuff in the lands
of JavaScript and TypedLua, is in line with that, unfortunately.
http://lambda-the-ultimate.org/node/5320

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Re: Porting Clojure to Native Platforms

2016-04-26 Thread Raoul Duke
> Sorry, never heard of horses for courses.  Does it mean sth like different
> strokes for different folks?

yessir.

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Re: Porting Clojure to Native Platforms

2016-04-26 Thread Raoul Duke
Horses for courses. Ask all the game people who use Lua big time. :-)

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Re: Porting Clojure to Native Platforms

2016-04-26 Thread Raoul Duke
RC & GC might complement. Don't throw out RC. Also, there are different
kinds of 'performance'. Horses for courses, you know.

https://www.google.com/search?q=bacon+gc+reference+counting+equation

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Re: Porting Clojure to Native Platforms

2016-04-25 Thread Raoul Duke
> The main motivation would be performance gains.

blah? so many impedance mismatches and layers of indirection that i
don't think it will gain much? i mean, it would probably be better to
spend time tuning gc parameters or something. just a rant / guess.
e.g. robovm is for some use cases perfectly fine performance wise
believe it or not.

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Re: Porting Clojure to Native Platforms

2016-04-25 Thread Raoul Duke
things like robovm are another possible approach.

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Re: Memory Locality - Maps vs. Vectors vs. Transient Maps & Vectors

2016-04-20 Thread Raoul Duke
You can only tell by benchmarking. And even then it can change when
you move to different hardware. You can debate about big O and
constant factors and numa and all that jazz till you are blue in the
face.

There are 3 kinds of people in the world:
1) those who think we should stick with arrays because, after all,
they *are* contiguous, and even if we have ssd's we still have cpu
cache limits.
3) those who think programmer productivity is most important and just
want to get it done and ship it and not have to bend over backwards to
use some api that is not really as easy to use for their use case as,
say, just using a blankeyblank hashmap.
2) everybody else.

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my new favorite s-expr video (seriously)

2016-03-29 Thread Raoul Duke
https://www.youtube.com/watch?v=HnZipJOan54

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Re: Clojure as first language

2016-03-19 Thread Raoul Duke
one word: redstone.

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Re: New Matrix Multiplication benchmarks - Neanderthal up to 60 times faster than core.matrix with Vectorz

2016-03-14 Thread Raoul Duke
Awesome would be a way for Cojure to generate C (perhaps with e.g.
Boehm–Demers–Weiser GC to get it kicked off) and JNI bindings all
automagically.

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Re: ANN replikativ 0.1.0 - strong eventual consistent P2P replication for clj and cljs

2016-01-22 Thread Raoul Duke
http://lambda-the-ultimate.org/search/node/crdt

nice to see powerful theory being made more practically available to
us masses. ;-)

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Re: Ultralight Components

2015-11-23 Thread Raoul Duke
re: mixins, traits, etc. those terms have all been used in both
research & shipped languages. Please see e.g. how Scala evolved with
those terms. :)

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Re: Data visualization workshops post-mortem

2015-11-19 Thread Raoul Duke
Wow, thank you for sharing the info! Cool.

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mbrace style integration?

2015-11-02 Thread Raoul Duke
hi,

ignorant question from me:

F#/dotnet has 'mbrace' which lets you, apparently, *super* easily
spawn things off to a cluster (cloud based). Instead of doing async {
/*worker code*/ }; you do cloud { /*worker code*/ }; and all the
management of getting it sent to the cloud, run, and back is
automagically handled.

What kinds of things might be similar in the clojure/java/scala world?

thanks.

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Re: If a Java function seems to never return, how do I test?

2015-11-02 Thread Raoul Duke
flush twice, oracle is far far away?

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Re: Ted Dziuba: The S in REST

2015-10-13 Thread Raoul Duke
The thought that came to my mind when reading it was something like,
"Hasn't anybody heard of MVCC?"

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Re: How to do functional programming

2015-10-08 Thread Raoul Duke
> https://www.coursera.org/course/proglang

cool. thanks for the pointer, i will have to find the time.

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Re: How to do functional programming

2015-10-08 Thread Raoul Duke
heck if you pay me U$D120 an hour, you can send me your code (as long
as it isn't more than a single page at 10 pt font, with regular
formatting ;-) and i'll tell ya how to do it more FPish
(kidding.)

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Re: How to do functional programming

2015-10-08 Thread Raoul Duke
> https://tbaldridge.pivotshare.com/media/oop-lesson-1/28290
> I do not remember if the other tutorials (2,3 and 4) on OOP are free as
> well…


i did this one a while back as a refresher on my university stuff :-)
https://www.coursera.org/course/progfun

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Re: How to do functional programming

2015-10-08 Thread Raoul Duke
> The way I like to think about FP vs OO is that OO usually couples state with
> identity and the code that operates on both, while FP defines a clear
> boundary between data, state, and the functions that operate on the data.

https://en.wikipedia.org/wiki/Expression_problem

> Designing a FP program often involves looking at the data first, then
> thinking about what transformations that the data needs in order to become
> what you want it to be. I like to think of functions as instructions about
> how to transform that data.

http://lists.racket-lang.org/users/archive/2010-April/038935.html

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Re: How to do functional programming

2015-10-08 Thread Raoul Duke
https://duckduckgo.com/?q=amit+clojure+book
http://www.htdp.org/
http://realmofracket.com/about.html
http://landoflisp.com
http://book.realworldhaskell.org/
http://www.powells.com/biblio/9781617290657

etc.

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Re: Writing Friendlier Clojure

2015-10-08 Thread Raoul Duke
blah.

"Whenever you notice this pattern, you can probably turn to one of the
threading macros instead."

that would fly in the face of being more declarative; when we start to
put in explicit ordering, instead of leaving it as just relationships,
that can be bad. of course it can also be good. even both at the same
time.

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Re: Puzzlement over closing core.async channels asynchronously

2015-09-17 Thread Raoul Duke
> Thanks for the rapid response! You could say that you put this in there as
> an exercise for the viewer; I know that in discussing it amongst ourselves,
> we definitely sharpened our understanding of some of the concepts.


I guess I'd see it as an argument for static checking around
concurrency, but that's just me.

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Re: [ANN] sniper, emacs assistant for deleting dead code

2015-07-29 Thread Raoul Duke
> Inspired by YAGNI, I made this code analyzer and emacs assistant for
> deleting dead code (and then used it to delete 10% of our codebase):


oh, i thought the punch line was it was either going to delete you, or
delete itself ;-)

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Re: Advice on introducing a Java dev to Clojure

2015-07-09 Thread Raoul Duke
> and I need to be 10 times more productive. =)

you mean, after your 2 week ramp-up time, right?

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Re: let vs. let*

2015-06-25 Thread Raoul Duke
My apologies (sincerely). Won't use that again.

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Re: Writing REST api the right way

2015-06-24 Thread Raoul Duke
> That would apply to common actions like typing and entering. Login being
> slower than that isn't likely to be as much of a bother as you likely only
> do it infrequently, maybe as much as once a day if you're paranoid and clear
> cookies nightly.

Yeah, to me that is the sort of reasoning that leads in the long run
to the kind of experiences we regularly have with the web: slow. Death
of a thousand overheads of 250 msec cuts. $0.02. I know, I know, there
are more important things for the engineers to fix right now, and for
the forseeable future, I know! :-)

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Re: Writing REST api the right way

2015-06-24 Thread Raoul Duke
> 350ms sounds fast enough for a low-frequency user interaction. In fact, once
> login is fast enough not to annoy your users, you don't *want* any more
> speed from it, as further speedup then only benefits blackhats trying to
> brute-force one of your users' accounts. So, it might be a feature, not a
> bug.

Those seem like really weird statements to me. :-)

a) I thought it was 250 msec as the upper abound for things feeling
snappy. Tho others apparently say 100 msec or less.
http://stackoverflow.com/questions/536300/what-is-the-shortest-perceivable-application-response-delay

b) If anybody is relying on 350 msec vs. e.g. 100 msec as some grand
solution to black hats brute forcing logins, I strongly suspect they
are doing it very wrong.

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Re: let vs. let*

2015-06-18 Thread Raoul Duke
http://lmgtfy.com/?q=clojure+%22let+vs.+let*%22

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re: functional == slow

2015-05-15 Thread Raoul Duke
at least, it often feels like that is the practical reality cf.
clojure vs. java; f# vs. c#; haskell vs. c -- oh, wait a minute:
http://www.cs.ru.nl/P.Achten/IFL2013/symposium_proceedings_IFL2013/ifl2013_submission_20.pdf

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Re: Why does the following Clojure code take 10x the time the C# version does? How to improve the Clojure version?

2015-05-14 Thread Raoul Duke
> I.e. your time is better spent optimizing a fn that's called 1k times per
> second and it's a little slow (for example, missing a type hint and has to
> do reflection or using boxed math) vs. a fn that's very slow but is only
> called once a minute.

not all apps, and not all developers, end up with code that has hot
spots (ha ha).

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Re: separation of concerns w/o encapsulation

2015-05-14 Thread Raoul Duke
> Once an engineer comes to grok FP, they tend to organize code around how
> data 'flows' between these pure functions to produce output data. The
> structure of how functions connect to form the structure of a functional
> computation has typically been informal. Until now

see Flow Based Programming, Dataflow, LabView, etc.

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Re: Why does the following Clojure code take 10x the time the C# version does? How to improve the Clojure version?

2015-05-14 Thread Raoul Duke
Ditto F# vs. C#.

One has to wonder when / where / if functional-pure-immutable
approaches will ever under the covers get "fast enough"?

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Re: What does ^:internal mean?

2015-05-12 Thread Raoul Duke
knowing how to break down Clojure's syntax a bit helps, too. which
means newbies are kinda screwed until they divine this.

http://stackoverflow.com/questions/8920137/clojure-caret-as-a-symbol

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Re: What does ^:internal mean?

2015-05-12 Thread Raoul Duke
even github gets it totally wrong, apparently?

https://github.com/laurentpetit/ccw/search?utf8=%E2%9C%93&q=%22^%3Ainternal%22&type=Code

because, you know, it isn't as if github is mostly all about hosting *code*.

such that, you know, you'd think they'd have realized by now this kind
of feature is desirable / the current functionality is a huge
lameness.

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Re: What is a real example of the Observer pattern?

2015-05-07 Thread Raoul Duke
Observer is often used in Java & iOS-Objective-C & Android-Java.

As with any "eventing" kind of thing it is a very double-edged tool.

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Re: how goeth the STM experiment?

2015-05-06 Thread Raoul Duke
Thanks for the thoughts!

If anybody also has any other STM experience (e.g. Haskell?) to
compare/contrast, that would be nifty to hear.

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how goeth the STM experiment?

2015-05-05 Thread Raoul Duke
hi,

What do people think of STM after all these years? What pros vs. cons
are there - has the community evolved the list of them?

thanks for any thoughts.

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Re: Clojure needs a web framework with more momentum

2015-05-04 Thread Raoul Duke
> Yes, Play has overtaken Lift, not because it is necessarily better, but 
> because TypeSafe are pouring marketing dollars into it, as part of their 
> drive to encourage Enterprise uptake of Scala. They have a vested interest in 
> Play being very successful as it will drive more business for them.


of course, there are folks who say Typesafe wears no clothes.

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Re: Clojure needs a web framework with more momentum

2015-05-04 Thread Raoul Duke
> Can you elaborate? Lift got it right or was a disaster?

oh! good question, sorry :-)

i believe it got it far more right than wrong.

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Re: Clojure needs a web framework with more momentum

2015-05-04 Thread Raoul Duke
>> vulnerabilities that would not exist using an integrated framework.

fwiw, web + security always makes me think of http://liftweb.net/

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Re: I wrote a functional Lisp in Clojure. Come have a look

2015-05-04 Thread Raoul Duke
re: lux -- keen! also, check out http://shenlanguage.org/, it has a
clojure target in the works.

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Re: Embedded systems and transpiling Clojure to Nim

2015-05-01 Thread Raoul Duke
My goodness, there are other things than Clojure in the universe.
People have been making "native" software with "real" languages for
ages. There's probably even some that are fpish or heck go get an
actual lisp that's been used for ever (franz, allegro, ecl, gambit,
chicken, clozure, tinyscheme, etc.). Or an async or sync dataflow
langauge. Or just lua. etc. etc. etc. :-)

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Re: Embedded systems and transpiling Clojure to Nim

2015-05-01 Thread Raoul Duke
> Both Nim and Pixie ultimately compile to C, and would have just as many
> layers of indirection.

aand they are all insane for anything other than learning
themselves at this point, i'd hazard to guess. but i'm a realist, who
knows. i'd rather go for a real jvm e.g. azul's embedded stuff, or
something like that first if at all possible. :-)

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Re: Embedded systems and transpiling Clojure to Nim

2015-05-01 Thread Raoul Duke
all i'm trying to say is that the more layers of indirection you add,
the more i won't give you any money on kickstarter.

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Re: Embedded systems and transpiling Clojure to Nim

2015-05-01 Thread Raoul Duke
I just would guess that anything other than an embedded JVM would
be... poor r.o.i., to be polite.

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Re: Embedded systems and transpiling Clojure to Nim

2015-05-01 Thread Raoul Duke
> Another possibility is https://github.com/takeoutweight/clojure-scheme. It
> compiles Clojure to Gambit Scheme to C to metal.

another possibility is to stab oneself in the eye with a sharp stick.

just sayin'.

:-)

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Re: Zelkova: Elm-style FRP for Clojure and ClojureScript

2014-12-06 Thread Raoul Duke
i guess "big projects" at the bottom of
http://elm-lang.org/Examples.elm

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Re: Zelkova: Elm-style FRP for Clojure and ClojureScript

2014-12-06 Thread Raoul Duke
> From what I understand it's conceptually not ready for anything other
> than toy problems yet. Like Elm's restriction on static flow graphs. It's
> like programming without 1st class functions, you don't get very far.


I am not an Elm user, but I am on the mailing list :-) and I see real
things happening, I guess. So I'm interested to hear more, learn more,
eavesdrop more on any conversation that high-lights what you mean, how
you see the limits. Like, would the Elm folks just disagree from the
get-go since they've apparently made real things with it?

sincerely.

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Re: [ANN] silc - a tiny entity database for clojure (games)

2014-12-02 Thread Raoul Duke
> Actually, I would just use Long's. (MAX_VALUE = 9223372036854775807)

https://www.google.com/search?q=youtube+gangnam+overflow

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Re: If code is data why do we use text editors?

2014-11-17 Thread Raoul Duke
> Code is data, and sometimes the best way to format that data for human
> readability is sufficiently ad-hoc that no autoindent/pprinter could do a
> fully general good job.

+1

there should therefore be a region annotation that tells IDEs to leave
it the hell alone when the user invokes "reindent the whole file" type
commands :-)

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Re: If code is data why do we use text editors?

2014-11-14 Thread Raoul Duke
http://en.wikipedia.org/wiki/Intentional_programming

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Re: CCW bug [SEVERE]

2014-10-28 Thread Raoul Duke
> I remain wholly unconvinced that it's worth the hassle for a project this
> small.

personally i find your points persuasive; i hate going through that
stuff when i just wanted to finish a feature or whatever. still,
losing your code would suck a lot, and not having history can be a
frustrating thing sometimes, i've experienced.

i would hope that all developers already know and use some kind of
familiar vcs, even if it is just rcs on the same hard disk; at least
you get history then. the question to me is less "git or nothing" but
"vcs or nothing" to which i hope all devs vote for vcs.

if it is svn or a popular dvcs then you can probably get it hosted /
backed up with a cloud repro easily for free somewhere.

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Re: multimethod, record, type, and protocol pitfalls?

2014-10-27 Thread Raoul Duke
> Sure. But since Alan Kay is the guy who invented the term "object oriented",
> I guess his definition should be, at least, considered.
> It seems that nowadays that only Java is properly "object oriented". This is
> far from true.


i suspect you read my note as trying to pick a side.

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Re: multimethod, record, type, and protocol pitfalls?

2014-10-27 Thread Raoul Duke
> Notice that he intentionally left "inheritance" out from that definition.

there are more connotations of "object oriented" than there are quills
on a porcupine.

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Re: Critiques of "my-flatten" which uses CPS

2014-07-17 Thread Raoul Duke
> http://clojure.org/reducers

i dare say the "When to use" part should not be at the bottom but come
right after the otherwise laughably specious "yielding code that will
get faster automatically as machines get more cores".

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Re: An Averaging function

2014-07-10 Thread Raoul Duke
here are some related resources (books, videos). imbibe all of these
and it might help.
http://realmofracket.com/
http://landoflisp.com/
https://news.ycombinator.com/item?id=1023970

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Re: [Request for Feedback] Clojure Lab: IDE for Clojure in Clojure

2014-06-27 Thread Raoul Duke
> I've been on Java 8 on my development Mac for ages. The only thing holding
> us back from going to Java 8 in production is New Relic don't yet support
> it...
>
> We upgraded our entire stack to Java 7 back in October and I thought we were
> late since Java 6 had been EOL'd for so long :)

i'm on to 7 now at least. so now i can show my face at parties.

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Re: [Request for Feedback] Clojure Lab: IDE for Clojure in Clojure

2014-06-27 Thread Raoul Duke
ugh, thanks. nice how i can just update it with app store. oh, wait??

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Re: [Request for Feedback] Clojure Lab: IDE for Clojure in Clojure

2014-06-27 Thread Raoul Duke
why does it require java 1.7? this newish mavericks macbook only has
1.6 so i would guess you've just made it hard for a lot of people to
try this out? :-(

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Re: Clojure: Clojure.contrib.sql: How do I update ALL the rows of a database table?

2014-06-26 Thread Raoul Duke
er, should the various pages be updated to say that they are all super
deprecated now?
e.g. things that turn up in google:
http://dev.clojure.org/display/doc/Clojure+Contrib+Libraries

On Thu, Jun 26, 2014 at 3:58 PM, Sean Corfield  wrote:
> Clojure Contrib libraries are all deprecated and very out of date.
>
> For clojure.contrib.sql, you'll want to use clojure.java.jdbc instead.
> Complete (community-maintained) documentation can be found here:
>
> http://clojure-doc.org/articles/ecosystem/java_jdbc/home.html
>
> Reference documentation can be found here:
>
> http://clojure.github.io/java.jdbc/
>
> Sean
>
> On Jun 25, 2014, at 7:40 AM, June  wrote:
>
> clojuredocs.org/clojure_contrib/clojure.contrib.sql/… How do I set the where
> clause to 1=1?
>
>
>

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Re: deep thinking

2014-05-02 Thread Raoul Duke
> This is code Clojure programmers depend on to work. Are you suggesting
> that it is easier to read this code than a few paragraphs of natural
> language?
>
> I must say I really find it puzzling that there is so much
> resistance to writing words. It's not that hard.

if the code is so bad that it needs comments, then fix the freaking
source code in the first place.

;-) ;-)

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Re: Concurrently updating two structures

2014-03-21 Thread Raoul Duke
> I am just using this as a learning exercise, I do not need to be lectured
> about how to write a game loop...  I said obviously since that was my
> original request, I am only asking to learn clojure a little better.  I
> could just drop into java and write a serial loop that does this really fast
> but I don't care about that; also, telling me how something was done on an
> 8-bit computer is about as relevant as explaining to me the intricate
> biological reactions involved in elephant defecation.

you're hired! :-)

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Re: Concurrently updating two structures

2014-03-21 Thread Raoul Duke
> update them one at a time.  Obviously, I do not want to write something that
> updates the enemies and, after the enemies are fully updated, the bullets
> get updated. I need something that updates enemies while updating the
> bullets, at the same time.  Maybe a code example would help?

er... i suspect you need to explain better... it doesn't make any
sense to me what you are saying. you have to break out what you mean
by updating, and why they "obviously" cannot be done sequentially.
since, i suspect, that's how most all games have done it since the
dawn of 8 bit cpus :-) no?

i suspect you are saying you don't want enemies to step beyond a
bullet or some such issue. but waving some magic concurrency pixie
dust is not a solution, at least if you aren't able to explain how it
*would* be a solution.

generally in simple simulations you accept a certain finite time step
that things jump. and you have to deal with that explicitly e.g. in
your collision detection or whatever.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-19 Thread Raoul Duke
> I like FSMs, but they do not compose well.

some have argued for generative grammars that generate the fsm,
because it is generally easier to compose grammars, and then generate
the final fsm. iiuc.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-18 Thread Raoul Duke
> The thing is that our industry is based on layers upon layers of
> abstractions, whether at the physical level (integrated circuits,
> interfaces, etc.) or at the software level: binary (1GL) abstracted into
> assembly (2GL), then C language (3GL), etc. Virtual machines is now another

you maybe forgot microcode, too? ;-) ;-)

yes, there are a lot of abstractions! i day-dream that it would be
super keen if there were a way for us to have explicit models of them,
including their leaks! and if those models where composable. and then
if our tools could use those models to show us warnings and errors; to
generate stress tests in a guided-randomized quickcheck style; etc.
etc. etc.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-18 Thread Raoul Duke
> some sort of FSM. Perhaps concurrency could be modeled using FSMs, but I do
> not believe it is always a simple transition.

http://www.cis.upenn.edu/~stevez/papers/LZ06b.pdf

:-)

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Re: shenandoah

2014-03-14 Thread Raoul Duke
> unreachable. The "normal" GC would then have a lot less to do, helping
> achieve shorter pauses.

i have long wondered a similar wonder. :-) (i also naively day-dream
one could get the C# "IDisposing" style for free with something like
that.) the BitC folks have talked about all sorts of things along
these lines, including region inference stuff.

there are even real research results to back it up!

http://webcache.googleusercontent.com/search?q=cache:LyLsP0uBaywJ:researcher.ibm.com/files/us-bacon/Bacon03Pure.pdf+&cd=6&hl=en&ct=clnk

but i dunno that you should hold your breath waiting for this kind of
stuff to become mainstream.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-14 Thread Raoul Duke
> that closely match or can be massaged to match or 'have sympathy' for the
> hardware realities.  I think this can get lost when we stray too far.

i wish this were somehow more modeled, composed, and controllable up
in our ides and source code, rather than being esoteric tweaky options
in the various inscrutable layers. i want a futuristic JIT that does
this kind of stuff for me :-) :-)

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-14 Thread Raoul Duke
i am probably out of my depth here, i do not have extensive real-world
experience with the various ways to approach parallelism and
concurrency (to be distinguished of course), more run of the mill
stuff. so if i sound like i'm missing your point or am clueless i ask
for your patience :-)

> What's the sequential fraction of an arbitrary erlang program, can you even
> know (I don't know erlang, so I'm honestly asking)?

who cares? or rather, each person has to only care about their own
program & situation. maybe their stuff fits erlang. maybe it fits
better with something else e.g. LMAX. it. all. depends. :-)

everything depends on context. Martin's talk even included the part
where he bemoaned that people don't just stay single-threaded and fix
their crappy code first. running to concurrency and parallelism is
often a cop-out the way i hear him. that could be seen as arguing
'against' erlang.

so there are places where your program is mostly sequential and things
like "does the GC act like a GIL" do not matter as much as the
situation where you are trying to be more concurrent + parallel but
not distributed. in those sequential situations, maybe erlang becomes
a square peg for the round hole. (although i personally, through
suffering as a maintenance programmer, am a *huge* lover of the
recursive single assignment "turn" based approach to things, and i
love clojure's idea of having a consistent view of the world; most OO
people shoot me in the foot a year after they've left the company,
with their crappy macaroni code.)

> Shared memory pretty darn convenient, and we don't have hundred-core+ boxes
> yet.

i'm confused in that i thought you wrote shared memory ~= message
passing. so why talk about shared memory when that is a lie? just like
Martin said, RAM is a lie. why not realize everything is really
message passing in the long run, model it as such, understand the
issues as such? i do not have a chip on my shoulder about this, i'm
just sounding it out / exploring the thought.

sincerely.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-14 Thread Raoul Duke
>> cough cough erlang cough ahem
> Care to elaborate? :-)

"Now his point is that GC acts a super GIL which effectively kills all
the hard work done on the language and application design level."

erlang's approach to gc / sharing data / multi process / smp is i
think an interesting sweet spot. there sure as heck is not a GIL
effect by the GC.

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Re: STM and persistent data structures performance on mutli-core archs

2014-03-14 Thread Raoul Duke
cough cough erlang cough ahem

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Re: shenandoah

2014-03-13 Thread Raoul Duke
(related: asteroids in cal, by way of haskell.
http://s3.amazonaws.com/ns999/cal.html)

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Re: shenandoah

2014-03-12 Thread Raoul Duke
> pure way or the mutate objects in place way?  I can get great performance
> with clojure, no doubt about it, by violating the shat out of functional
> programming.  I can not get great performance with the beautiful, pure,
> composable, clojure that I desire!

(personally i think this is a great topic, of great interest to me
personally, and if one squints at it and forgets about the "game"
aspect, is a very relevant thing in general in terms of defending,
improving, being able to use "pure" approaches more often. i'm sure a
lot of folks who have heard of fp and pure fp equate it with utterly
bad performance, true or not.)

depending on the structure of your system, clojure's transients might
help. maybe. quite often in real games, there are explicit memory
pools per game tick. sorta like the autorelease pools in objective-c,
say. that's perhaps akin to region based memory management. (the BitC
folks pondered and pontificated upon regions for a while, but i don't
believe there's any "production quality" language that supports them
yet.)

in general, have there been closer-to-pure-than-mutating high
performance apps written ever, in any programming language? and if so,
how? could they have been done on a mobile device, or do they only
work when you have 4GB of main RAM etc.?

i've seen examples of "pure" asteroids in Haskell and CAL. J. Hague is
one of the standard urls to paste into a discussion like this.
http://prog21.dadgum.com/23.html.

Would things like linear/affine/uniqueness types be a better approach?
Personally I think/hope in the long run they would be, because they
get us the ability to *safely mutate*. So far I think the only
language which is remotely near to something one could use for
production, along those lines, is ATS which compiles down to C/++. It
might well be possible in Shen, that would be pretty exciting I think.

sincerely.

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Re: shenandoah

2014-03-12 Thread Raoul Duke
> bazillion pure functions.  I was wondering, would a GC like this one(or
> Azul's) make a significant impact so that I, or others, could make games in
> a more pure fashion?  I WANT MY EFFIN PURITY!

i'd rather have linear types or something like that, than some gc
solution. :-) i mean, if i'm dreaming.

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Re: is PG's "imperative outside-in" advice any good?

2013-10-15 Thread Raoul Duke
if a programming language doesn't have something like 'where', then i
am sad. http://stackoverflow.com/questions/4362328/haskell-where-vs-let

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Re: [ANN] 美味しいClojure

2013-10-03 Thread Raoul Duke
an olide: http://www.starling-software.com/en/tsac.html. i went once
when in town years back. it was fun. wish it were still going on.

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Re: In what OS do you code?

2013-06-14 Thread Raoul Duke
> Thanks for all the responses, it looks like Linux is the predominant OS in
> the Clojure community.


er, wow. that's a bit of a leap, isn't it?

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Re: possible side-effect/problem in http://clojure.org/concurrent_programming

2013-06-14 Thread Raoul Duke
> But only one task was active at a time, although Executors was configured
> with 4 threads. It occurred to me that map itself is lazy and it is realized
> in doseq one at a time. A possible fix is to use for instead of map to
> generate tasks


almost makes me wish there were types (er, sorry, metadata) associated
with functions that told us if they were single-threaded or not, so
one could more quickly find such blocks. :-)

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Re: Why the CLR languages fail?

2013-06-07 Thread Raoul Duke
> Be that as it may: if you work in a MS-centric company, shifting to JVM
> clojure is iffy at best. OTOH, convincing people who've never used anything
> except C# that there are alternatives worth considering is quite an uphill
> battle. At least one friend over the years has gotten fed up at my
> suggestions and sarcastically suggested doing everything in Prolog.

so sad. F# is one of the best languages out there.

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Re: Why aim for repeatability of specification / generative testing?

2013-06-06 Thread Raoul Duke
yes, a constant is weird. whenever i've implemented my own variant of
this, i always use a seed from the clock or whatever, and then spit
out the seed in test/assertion failure messages so people can paste it
back in to reproduce.

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Re: Why aim for repeatability of specification / generative testing?

2013-06-06 Thread Raoul Duke
i always thought it was basically solely for letting you re-run the
test that just/previously failed, nothing more weird or silly than
that.

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Re: "I don't feel the absence of a debugger, because I've learnt enough that I don't ever need a debugger."

2013-05-30 Thread Raoul Duke
for a long time haskell did not have a debugger. that sucked, imho.

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