The Programing Research Laboratory at Northeastern University is conducting
a study on the usability of visual and interactive syntax for
ClojureScript. Participation involves filling out a questionnaire and is
expected to take about 30 minutes. The questionnaire consists of multiple
choice an
se by the end-users of your language? I have a lot of
questions
about your language, actually, but I'll just wait for your demo.
It *is* an ambitious project, and I hope it succeeds. (Since most software
nowadays becomes part of "distributed systems" and they are, frankly, a
PITA.)
tionality of the libraries you
mentioned.
Muse and Urania give off a Haskell-y vibe (no surprise) and Graph feels
more Clojure-y
to me, but they are all interesting projects.
Thanks for the post,
Leif
On Tuesday, November 28, 2017 at 6:58:09 AM UTC-7, Eunmin Kim wrote:
Hi, folks
>
>
Nice, thanks.
You made it sound like regex-nav only navigates to simple substring
matches, which I was confused by, but I was pleased to find that it
navigates to full regex matches as returned by re-seq:
(transform
#"(\d{1,2})/(\d{1,2})/(\d{4})"
(fn [[date d m y]] (str m "/" d "/" y))
boilerplate)! This
is the future we've been waiting for.
Keep up the good work,
Leif
On Sunday, August 14, 2016 at 10:33:59 AM UTC-4, Ambrose Bonnaire-Sergeant
wrote:
>
> Hi,
>
> Happy to announce a new open-source Clojure tool
> to generate core.typed type annotat
data.
Functions in clojure are technically data, but an opaque,
uncommunicative form of
data. Me: “What’s your arity, fn?” Fn: *hostile silence*
- In conclusion, what’s your take on the proper relationship between
specification and
type checking?
—Leif
--
I guess I'm confused why the Clojure philosophy of "data > fns > macros" is
being ignored in this particular case, when the other schema libraries show
that there is an army of end-users that want to do unexpected things with
specifications, and to do that, it would be easiest if they had data I
On Wednesday, May 25, 2016 at 4:46:57 PM UTC-4, kovasb wrote:
>
>
> On Wed, May 25, 2016 at 3:01 PM, Mike Rodriguez > wrote:
>>
>> I always really liked that Prismatic Schema had a "data representation"
>> and that seems to be the Clojure-way anyways. I haven't dug into this too
>> much yet, bu
mentation hiding dooms clojure/core to write *all* the
translators. This just seems weird given how most other Clojure features
are open and user-extensible.
--Leif
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, se
7; in introduced, might take away the surprise and replace it
with luxurious comfort.
Is there a recommended way to introspect specs for our own purposes
(coercion, code generation)? An interpreter on the output of 'describe'
might work (although it's a little complicated for fn
to namespace all my damn map keywords, though
perhaps you'll lead me down the virtuous path.)
All that said, it looks good and I think I'll have fun trying it out.
--Leif
On Monday, May 23, 2016 at 10:12:29 AM UTC-4, Rich Hickey wrote:
>
> Introducing clojure.spec
>
> I'm hap
everyone: JVM/host
interactions more specific to deployment, like setting up the JVM to do
SSL/other networking correctly, JMX, much more I probably don't know about.
As I said, I don't know much Java, so I'd be interested in what more
seasoned devs think is important that I've le
short, having two libraries that do the same thing is not a problem, and
if it becomes a problem, I think we as a community can deal with it fairly
quickly.
--Leif
On Sunday, March 13, 2016 at 8:19:25 PM UTC-4, Dragan Djuric wrote:
>
> On Monday, March 14, 2016 at 12:28:24 AM UTC+
The Pedestal app is also strangely underperforming in some cases. A
Pedestal expert may want to take a look at its configuration.
On Saturday, February 27, 2016 at 9:40:28 PM UTC-5, g vim wrote:
>
> In the latest round of Techempower benchmarks:
>
> https://www.techempower.com/benchmarks/#secti
bug-com "message" :id "REMOTE")
REMOTE: DEBUG -> message <- COM
nil
If it really needs to be an anonymous function, `fn` works with the same
syntax.
Happy hacking,
Leif
On Tuesday, February 23, 2016 at 3:14:58 PM UTC-5, Fernando Abrao wrote:
>
> Hello, it w
I tried to answer this on your other thread. If it was unclear, please
tell me (on that thread) what points need to be clarified, and I'll try my
best. I am unsure why you started a new thread asking the same question,
with even less context.
--Leif
On Monday, December 28, 2015 at 3:
function interface, and
the call above is equivalent to
(get 1 'print '(2 3)) => '(2 3) ; Tries to look up 'print in the data
structure 1, fails, uses default value '(2 3).
Hope that helps,
Leif
On Thursday, December 24, 2015 at 8:38:44 AM UTC-5, Mian Pao wrote:
>
function interface, and
the call above is equivalent to
(get 1 'print '(2 3)) => '(2 3) ; Tries to look up 'print in the data
structure 1, fails, uses default value '(2 3).
Hope that helps,
Leif
On Thursday, December 24, 2015 at 8:38:44 AM UTC-5, Mian Pao wrote:
>
I took it to mean "How many people are *using* your Clojure app?"
On Friday, December 4, 2015 at 3:33:10 PM UTC-5, puzzler wrote:
>
> I took it to mean "How many people are working on your Clojure project?"
>
> On Fri, Dec 4, 2015 at 8:44 AM, James Reeves > wrote:
>
>> What does this question mea
your project is interesting: I think lots of
companies / open source orgs would like to know which portions of their
codebase need the most cross-training.
Good luck on your research,
Leif
On Friday, August 7, 2015 at 12:21:40 PM UTC-4, Guilherme Avelino wrote:
>
> As part of my PhD researc
as a whole will be more verbose, but it will be a verbosity that
has evident meaning.
Happy Clojuring,
Leif
On Thursday, July 30, 2015 at 7:59:27 PM UTC-4, kirby urner wrote:
>
>
> Thanks to excellent feedback, I now realize my code was overly verbose, a
> common phenomenon among
oling, it's probably advisable to test against 1.7-RC.
--Leif
On Tuesday, May 26, 2015 at 9:19:00 PM UTC-4, Alex Miller wrote:
>
> That's not what I see with 1.7.0-RC1 (or any of the betas). I tried with
> both Java 1.7.0_25 and 1.8.0-b132.
>
> user=> *cloju
java.util.concurrent.TimeUnit) (range)) (into {}) (java.util.EnumMap.)
(.entrySet) (map str) (into []))
["DAYS=6" "DAYS=6" "DAYS=6" "DAYS=6" "DAYS=6" "DAYS=6" "DAYS=6"]
--Leif
On Tuesday, May 26, 2015 at 8:39:14 PM UTC-4, Dani
"Elapsed time: 1155.723592 msecs"
I implemented the changes Amith and Steven suggested on my multithreaded
version. I think we can safely say that, with a modest effort, Clojure can
compare favorably to C#. :)
https://gist.github.com/leifp/a864bca941ecdacb5840
Cheers,
Leif
On Tuesd
ting to you. Questions / comments welcome.
Leif
P.S. I apologize for the messy, repetitive, stream-of-consciousness code.
On Thursday, May 14, 2015 at 4:02:42 AM UTC-4, Amith George wrote:
>
> I wrote the following code to solve this challenge -
> https://www.reddit.com/r
;t well-trodden ground, given the amount of
people using Components to organize their apps, but I can't find any
examples. Perhaps I am just failing to use the internet properly.
Thanks,
Leif
--
You received this message because you are subscribed to the Google
Groups "Clojure" grou
d moff7 (bit-shift-right num off7))
(throw IAE
Or just write the unrolled version by hand. I think you would get a fair
speedup if you did that for ldb and dpb.
Hoping that's clearer,
Leif
On Monday, February 23, 2015 at 9:20:12 PM UTC-5, Leif wrote:
>
>
> If you
-time. So you
could partially evaluate (i.e. unroll, i.e. ~make lookup table for) 'ldb'
and 'dpb' for the 8 or 9 different first arguments you actually call it
with. I unrolled your 'mask' fn into a 8-way case statement, and got about
6% speedup.
--Leif
On Monda
components
That means only code in your blessed ns can read the file, or things
break. Also, the edn spec disallows keywords beginning with "::". So, I'd
suggest either following the edn spec or using the ".clj" ending for the
config files.
--Leif
On Saturday, January 2
use once, I usually
just inline it. Unless of course I believe deep in my heart I'll have need
of it somewhere else soon :).
This is somewhat a matter of taste, and again, the requirements history
usually determines what gets abstracted into functions, and history can be
messy. :)
undreds or thousands of variables. Maybe I'm just not
experienced enough with core.logic, experts chime in if so.
--Leif
On Friday, May 16, 2014 3:31:26 PM UTC-4, Brad Kurtz wrote:
>
> I'm pretty new to Clojure so I'm trying out simple examples to see if I
> can get my
//clojure.github.io/clojure/clojure.core-api.html#clojure.core/isa?>on
their corresponding elements:
(isa? [::square ::rect] [::shape ::shape])"
--Leif
On Monday, May 12, 2014 8:41:35 PM UTC-4, r wrote:
>
> Why is something like
>
> (derive [::matrix ::ring-element] ::ring-ele
ed to be shared, you'll have to make your own
version of assoc, dissoc, maybe conj & into, etc etc, and remember to
always use them. It could get complicated.
--Leif
On Saturday, May 3, 2014 10:27:29 PM UTC-4, Mike Fikes wrote:
>
> Are there common techniques or idioms for achie
reduction, I'll put the collection at the end; This adds
an element, I'll put the collection at the beginning.").
--Leif
On Wednesday, April 30, 2014 11:22:55 PM UTC-4, Colin Fleming wrote:
>
> Hi everyone,
>
> After the very interesting keyword argument debate, I h
Since you already like clojurewerkz EEP, why not just add a time-sliding
window to it?
--Leif
On Wednesday, April 30, 2014 5:13:42 PM UTC-4, Paulo Suzart wrote:
>
> Humm. Actually narretor flushes all messages. Still not what I'm looking
> for somethiing like this:
> http://d
e Maven coordinates and the Java
package names are not necessarily the same or even similar.
--Leif
On Wednesday, April 30, 2014 11:40:31 AM UTC-4, Alan Forrester wrote:
>
> I would like to try the JTransforms Java FFT library from Clojure:
>
> https://sites.google.com/site/piotrwendykier/s
q=https%3A%2F%2Fucb.youcanbook.me%2F&sa=D&sntz=1&usg=AFQjCNGoo6exDmYGhdu-4qu3L9tL2v8AkQ>
Best wishes,
Leif
On Thursday, April 10, 2014 8:53:26 AM UTC-4, Leif wrote:
>
> Hi, everybody. Inspired by the SF Bay Area clojure group, ClojureBridge,
> and the great talks on community e
ers" picking up
clojure for a specific reason or library can have a more productive
session. E.g. some descriptions could read:
Leif Poorman
Location: Eastern USA
Languages: en
Tags: beginners, absolute beginners, web, data analysis, machine learning
Rich Hickey (obviousl
e the
code calling the predicate, only the getter fn (if that),
--Leif
On Thursday, April 17, 2014 12:33:42 PM UTC-4, Sean Corfield wrote:
>
> The library coding standards[1] say:
>
> * Use '?' suffix for predicates.
> - N.B. - predicates return booleans
>
> a
probably just silent because the time
difference is so large; So, I definitely think some European / African /
Asian / Australian clojure devs' office hours would be popular. It's fun,
and you might find some people to hire, if that's your thing!
--Leif
On Thursday, April 17, 2
@Everyone: To clarify / reiterate: You do *not* need a plan, a project,
or a specific problem. If you want to work through Project Euler,
4clojure, clojure-koans, the ClojureBridge materials, some other clojure
tutorial, or just play it by ear, I am happy to try it out.
--Leif
On Tuesday, A
ing they do this even for non-"code
blows up" errors, they must make a list of common mistakes and the output
generated by those mistakes (which to do correctly would require lots of
user testing).
--Leif
On Saturday, January 25, 2014 1:54:10 PM UTC-5, Bridget wrote:
>
> Ope
uot;; #{"documentation"}]
["https://github.com/michaelklishin/neocons"; #{"usability"
"documentation"}]
["https://github.com/michaelklishin/quartzite"; #{"documentation"}]
["https://github.com/cfpb/qu"; #{"docs"}]
[&
ood! Of course, now I'll have to take some time this weekend
and try to actually understand Om. :) (or maybe ?o_0? )
--Leif
On Thursday, April 10, 2014 9:56:37 AM UTC-4, frye wrote:
>
> Sounds great. I just sent a request.
>
> Tim Washington
> Interruptsoftware.com &l
work queues and distributed caches and
such, you might want to use Immutant as a platform to prototype, as it
wraps all that up with a nice bow for you.
And again, if you narrow the design space somewhat, many people way more
informed than me will probably chime in.
Hope that helps,
Leif
On Thu
s://leifpoorman.youcanbook.me/
Note: all the times are evening, US Eastern. That pretty much limits it to
the western hemisphere and any east asian friends that want to do some
morning hacking. Eastern hemisphere friends, make noise on this thread,
and maybe some brave European/Asian cloju
idate your feeling that this shouldn't be a
one-liner; you can generalize 'set-item-name', and then if you do want to
change the data structure later, you only have to change the general
function.
--Leif
On Tuesday, April 8, 2014 7:10:13 PM UTC-4, Ivan Schuetz wrote:
>
>
, one good design decision that you
may want to borrow is separating the graph construction, compilation, and
execution phases.
Cheers,
Leif
On Monday, April 7, 2014 7:03:48 PM UTC-4, Hesen Peng wrote:
>
>
> Hi everybody,
>
> You might have experienced writing up multiple functio
Very nice. Thanks for all your hard work, Peter!
On Monday, April 7, 2014 11:52:31 AM UTC-4, Peter Taoussanis wrote:
>
> Hi all, quick batched update on some libs that I put out. Hope someone
> finds these useful. As usual, API docs are available on each GitHub page.
>
> Have fun, cheers :-)
>
>
Wow! Great job!
Of course, with the bar set so high, this means that every clojure
conference will have to be live-streamed from now on ;)
On Tuesday, March 25, 2014 8:46:50 AM UTC-4, Ustun Ozgur wrote:
>
> Looks like most of the videos at Clojure/West 2014 which started yesterday
> have been
meone else with a byte-munging specific library, if that
exists) has done.
--Leif
On Thursday, March 13, 2014 7:42:35 AM UTC-4, Leif wrote:
>
> Hi, Ignacio.
>
> Performance tuning in clojure being somewhat complicated, I would look for
> prior art here. For instance, the suggestions
dling. I would look/ask
around.
If you're interested, the main slowdown in the above suggestions is
probably the extra work from safe typecasts clojure does. The hiphip
library uses the unsafe equivalents from clojure.lang.RT.
Cheers,
Leif
On Thursday, March 13, 2014 1:26:33 AM UTC-4, I
You may want to try the naive approach: 400k records sounds like it
could very well fit into memory, as long as each record doesn't have a huge
amount of data.
4. A library that has tools to deal with big files:
https://github.com/kyleburton/clj-etl-utils
--Leif
On Monday, March 10, 20
st if data is actually being synced to disk at
my specified interval?
Please forgive my suspicious nature,
Leif
On Friday, March 7, 2014 4:21:44 PM UTC-5, Zach Tellman wrote:
>
> I added the above-described features a few weeks back, but only got around
> to marking 0.1.1 today. Fsy
up
`(macrolet [~defpop-decl]
(defn execute [~x] ~body
Hope that helps,
Leif
On Wednesday, March 5, 2014 12:37:24 PM UTC-5, milinda wrote:
>
> Thanks Konrad. Your unquoting trick worked. But I am not exactly sure how
> to reason about these types of situations. Can you please
re you want directly.
Happy coding,
Leif
On Monday, February 17, 2014 5:50:13 PM UTC-5, Joerg wrote:
>
> Hi,
>
> From a for-function over some xml-input (filtered and mapped), I get this
> list:
>
> ("ITEM2" ["ITEM1"] ["B"] "A" "ITEM1
n't expand special
form
> (macroexpand '(stch.schema/fn* simple-fn :- Int [x :- Int] (inc x)))
; => (let* [ufv__ stch.schema.util/use-fn-validation ...) ; works
--Leif
On Thursday, February 6, 2014 2:18:58 PM UTC-5, da...@dsargeant.com wrote:
>
> Please check out the repo README page
As Mars0i says below, this is due to concat; more specifically, since map,
partition, and concat all return lazy sequences, with recursion you are
constructing a large chain of nested lazy sequences, as explained here:
http://stackoverflow.com/questions/5294055/why-am-i-getting-a-stackoverflow
b.com/ztellman?tab=repositories (potemkin, clj-tuple,
immutable-bitset, et al)
Hope that helps,
Leif
On Saturday, November 16, 2013 7:01:14 PM UTC-5, Alexandru Nedelcu wrote:
>
> Hi,
>
> I'm trying to understand the design of Clojure's collections and one
> thing th
Maybe vijual?
https://github.com/drcode/vijual
Development seems to have stopped, but one of the forks might be up-to-date
enough for you.
On Monday, November 11, 2013 9:51:19 AM UTC-5, Tim Visher wrote:
>
> This smacks of something that I saw in a Stu Halloway talk once. I
> also can't rememb
. Is there a list somewhere
of "Javascript gotchas that you still have to worry about in Clojurescript"?
Thanks to all the clojurescript devs,
Leif
On Monday, October 28, 2013 12:25:31 AM UTC-4, David Nolen wrote:
>
> Given the source map improvements to ClojureScript, now is a good
[x y] y) a b))
;; bonus: also useful for fns that don't return a map
(defn max-depth [m]
(->> m
flatten
(map (comp count first))
(apply max 0)))
I think these fns are the same as yours. I have not tested them in any
significant way, though. I am also not think
;(:in [1 2 3]). This appears within Alex's
solution.
I would personally go with Meikel's solution, though. It seems the nicest.
--Leif
On Monday, September 9, 2013 7:02:43 PM UTC-4, Mark Mandel wrote:
>
> The solution I've actually gone with is:
>
> (apply esd/sear
's (f x logger emailer metric-logger
...)
4. I'm not really familiar with the methods you describe, so any
elaboration on your comments would be welcome. Or even better, a link to a
project that uses the designs you mentioned.
Thanks,
Leif
On Monday, March 25, 2013 5:57:34 AM UTC-4,
Hi, Allen.
My own version of with-redefs? That *sounds* kind of hard. Could you keep
an atom with the "original" bound value (the first one my-with-redefs sees,
anyway) and then always roll back to that value? Something like that?
Thanks,
Leif
On Monday, March 25, 2013 1:58:5
quot;." in this case probably means
"look in the root of all directories on the classpath." (I'm guessing;
Java experts speak up.)
--Leif
On Tuesday, March 26, 2013 12:25:43 PM UTC-4, MC Andre wrote:
>
> I tried setting *compile-path* to ".", but Clojure st
trust your instincts on this one. :)
--Leif
On Sunday, March 24, 2013 8:24:53 AM UTC-4, Ryan wrote:
>
> Hello all,
>
> I am trying to figure out which is the most idiomatic way to go in a
> project I am doing. I've noticed the following pattern in my code and I
> sta
integration tests that ran permanently
rewrote some fns. I would imagine that this could even happen in unit
tests, though, if your test runner executed tests in parallel.
Has anyone run into a similar problem, and come up with a safer way of
stubbing / mocking non-dynamic vars?
Thanks,
Leif
This may be slightly off topic, but your "longest contiguous common
subsequence" problem sounds like the "longest common substring" problem.
Your code uses the dynamic programming solution, which is O(M*N), but
there are O(M+N) algorithms that might be faster depending on the length
and "alpha
uot;, :id "P-678",
:iid 3,
:product "P-678",
:quantity 1,
:purchased true,
:iname "Shirt"}
...}
It might look even nicer if you just used regular maps with namespaced keys
instead of records:
(clojure.set/join items products {:item/product :product
+1. I know of a couple tools in python for this purpose that are called
"workflow management systems." It would be good to know if there is a
robust one in clojure.
On Monday, August 20, 2012 12:18:54 AM UTC-4, matt hoffman wrote:
>
> I have a problem that I'm trying to figure out how to tack
- Slow. If you're dispatching to a fn that runs for > 10ms, it's not a
huge problem. But, yeah, it's a lot slower than any other kind of
dispatch. But if you're doing dispatch this complicated, the speedy
alternative is giant nested cond and case statements.
A
od example of testing code that modifies
global state? Right now I'm adding multimethods and derive-ing things,
extending protocols, etc.. I'd like to make sure tests don't interfere
with each other.
This might all be off topic. Should I start a new thread (or two)?
--Leif
On Sa
of subtyping between maps in Typed Clojure, where
>
> {:a 1, :b 2} <: {:a Number}
>
> Thanks,
> Ambrose
>
> On Wed, Jul 11, 2012 at 2:16 PM, Leif wrote:
>
>> Hi, everybody. I reimplemented the function isa? in terms of a protocol
>> Is-A.
>>
>
omes, to a certain extent, open. See the
README.
Comments, critique, code, and questions welcome.
Cheers,
Leif
P.S. As an aside to people that like weird, obscure programming languages,
the rough idea of how is-a? should work for maps was inspired by (but very
much simpler than) the functi
I know this doesn't answer your question, but why are you contemplating
using Jade in Clojure, instead of Hiccup or Enlive, which seem like better
markup solutions (for different reasons)? Is it just for the sake of
uniformity throughout your codebase?
On Wednesday, July 4, 2012 10:32:17 PM UT
is will start some discussion.
I really think that single elements are the place to bottom out the
recursion.
On Sunday, May 20, 2012 3:24:57 PM UTC-4, Leif wrote:
>
> From the article: "The combining fn must supply an identity value when
> called with no arguments" This
23 and also equal to
Double.longBitsToDouble(0x7fefL). "
To explain the decimal exponent,
user> (/ (Math/log 10) (Math/log 2))
3.3219280948873626
user> (/ 1024 3.3219280948873626)
308.2547155599167
--Leif
On Tuesday, June 26, 2012 12:19:49 AM UTC-4, Cedric Greevey w
on []) ;==> throws ArityException
It might fix things to special-case empty collections and make the "leaves"
of the recursion single elements, but maybe functions with these weird
non-computable identity elements, like set intersection, are too rare to
bother. I can't think of ano
I'd also like to make sure people are aware of this oddity. I discovered
this after reading an article about the bad design of PHP. I read that in
PHP, "== is not transitive." I thought "Ha ha ha, that ridiculous PHP!"
Then I checked c.c/== ; Imagine my reaction when I learned that Clojure
ast property that causes the weird behavior for maps
and sets.
--Leif
On Tuesday, April 3, 2012 12:11:50 AM UTC-7, JuanManuel Gimeno Illa wrote:
>
> Playing with some problems of 4clojure, I wanted to make a map which, for
> each empty collection, returns a keyword. But it seems that it
Huh. That raises the question "Why doesn't
clojure.lang.ITransientCollection extend clojure.lang.IEditableCollection,
so the .asTransient method is idempotent?" Would that make a circular
reference?
--Leif
On Tuesday, March 20, 2012 3:32:28 PM UTC-7, Andy Fingerhut wrote:
&g
Unfortunately, the reader does not actually follow this spec, e.g. it will
happily accept :div#id.cla$$ as a valid keyword. Some web programming
clojure[script] libraries use this pseudo-CSS syntax in keywords, so if the
reader was changed to strictly follow these rules, a lot of web code woul
t;> > Sent from my iPod Shufflehttp://pepijndevos.nl
>
> --
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Cheers,
Leif
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>
> --
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