FYI:
http://stackoverflow.com/questions/21759848/
On Thursday, February 13, 2014 11:02:07 AM UTC-5, Xiaojun Weng wrote:
I am a new clojure player,but i have wrote java code by few years.
when i use emacs run my clojure code (read a big file 50M ) , nrepl run
over use 30 second.
but i
inline
On Saturday, February 15, 2014 12:41:52 AM UTC-5, Mars0i wrote:
Could someone clarify for me why some? as a name for not nil makes sense
at all in the first place? Not criticizing. I just don't understand what
existence or there being some of something has to do with nil.
Maybe
I'm also very new to clojure but this is how I'd do it:
(def hr-zones {
[0 100] :low
[101 120] :fat-burn
[121 140] :aerobic
[141 160] :anaerobic
[161 333] :max})
(defn hr-zone [hr]
(some (fn [x]
(and (= (first (key x)) hr (second (key x)))
(val x)))
hr-zones))
)))
(partition 2 1 m))
Cheers
On Sunday, February 16, 2014 6:47:51 PM UTC-5, Andy- wrote:
I'm also very new to clojure but this is how I'd do it:
(def hr-zones {
[0 100] :low
[101 120] :fat-burn
[121 140] :aerobic
[141 160] :anaerobic
[161 333] :max})
(defn hr-zone [hr
On Sunday, February 16, 2014 6:05:24 PM UTC-5, puzzler wrote:
I am unable to find a style file that supports clojure code in LaTeX. Can
anyone point me in the right direction?
Pygments can output LaTeX. (There is also minted)
HTH
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On Sunday, February 16, 2014 11:19:58 PM UTC-5, Bruno Kim Medeiros Cesar
wrote:
(BTW, Andy, how do you format your code so prettily?)
I usually just paste it into pygments.org and then paste it back into
google groups (which accepts the generated HTML).
Cheers
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On Monday, February 17, 2014 6:43:18 PM UTC-5, Laurent Droin wrote:
(def inf Long/MAX_VALUE)
(defn quantize
[x markers values]
(let
[f (partial (fn([%1 %2 %3] (cond (= %1 %2) %3))) x)]
(first (filter #(not (nil? %))(map f (conj markers inf) values)
The reason I didn't go
Without having tested it: I think you're curl -d format is wrong. It's
not semicolon separated:
http://superuser.com/questions/149329/what-is-the-curl-command-line-syntax-to-do-a-post-request
HTH
On Wednesday, February 18, 2015 at 7:09:19 AM UTC-5, g vim wrote:
I have a Liberator app which
Off topic for this list but I'm sure helpful to some:
On Windows: You can see open file handles with MS's Process Explorer.
On Linux: There is `lsof`, or if you like interactive: The popular `htop`
utility allows you to press `l` to see all open ports, files and cwd of a
process.
This quickly
Tried myself and my first transducer for fun:
(defn partition-when
[f]
(fn [rf]
(let [a (java.util.ArrayList.)
fval (volatile! false)]
(fn
([] (rf))
([result]
(let [result (if (.isEmpty a)
result
to
some public location, this is a great place to get involved contributing to
ClojureScript without needing to dig into the compiler.
My earlier points about the general performance expectations of
multimethods in ClojureScript still stands :)
David
On Mon, Apr 27, 2015 at 9:44 AM, Andy
Looks like they're pretty slow compared to a simple case:
http://jsperf.com/cljs-multimethods
https://github.com/rauhs/cljs-perf
On Saturday, April 25, 2015 at 10:33:18 AM UTC-4, Timur wrote:
Hi everyone,
There are situations where I want to dispatch functions using based on
their
In addition to James comment: IMO clojure.org/metadata should be clearer
about this. It's mentioned more clearly on the reader page:
http://clojure.org/reader#The%20Reader--Macro%20characters
The metadata reader macro first reads the metadata and attaches it to the
next form read (see with-meta
%)
Is this a good idea and rock solid implementation? I'm a little worried
this breaks down for corner cases (and this would be no fun to debug).
Or am abusing transducers here? What would be a good way to implement this?
Possibly even further up the chain?
Thanks for reading,
Andy
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confusing. The metadata documentation says clearly that
are equivalent, but are not equivalent.
Thank you very much again.
Regards.
Andrey
2015-05-05 21:49 GMT+02:00 Andy- andre...@gmail.com javascript::
In addition to James comment: IMO clojure.org/metadata should be clearer
about this. It's
:
On May 9, 2015, at 6:28 PM, Andy- andre...@gmail.com javascript:
wrote:
(defn take-while-xf
Takes a transducer and returns a transducer that will immediately
finish (ie
call (reduced)) when the transducer did not call the reducing function
and
just returned the result. Only
There was just this question the other day:
http://stackoverflow.com/questions/30922413/why-does-metadata-symbol-not-work
There is also a few threads a few weeks ago here on google groups about it:
https://groups.google.com/d/msg/clojure/_e7vBom2acw/0AAKTiGuzv4J
HTH
On Thursday, June 25,
The sidebar on reddit is actually pretty decent:
http://www.reddit.com/r/clojure
My #1 resource for looking up docs is nowadays clojuredocs.org since it
gives examples/comments for most of the functions.
HTH
On Thursday, June 25, 2015 at 4:59:12 AM UTC-4, Baskar Kalyanasamy wrote:
hi
On Thursday, June 11, 2015 at 5:32:02 AM UTC-4, Ritchie Cai wrote:
Just wondering though, is there a faster way to load an array than this
way?
https://github.com/malloc82/imaging/blob/45475b99f564b1ac77e668e04b91cb9c01a096d7/src/imaging/dicom.clj#L138
the data file I'm trying to read from
I have yet to evaluate it myself but this might do help you:
https://github.com/nathanmarz/specter
On Wednesday, August 19, 2015 at 10:18:06 AM UTC-4, Hussein B. wrote:
Hi,
I have transformed JSON response into the equivalent data structure using
Cheshire library.
The result is a huge
You might like some of immutant's stuff:
http://immutant.org/documentation/2.0.2/apidoc/guide-transactions.html
Even though it's called caching, it can be used as a kv-store. They do
offer persistence and transaction.
HTH
On Sunday, August 16, 2015 at 10:59:09 AM UTC-4, Jeremy Vuillermet
Only to answer the "retry on error" part of you question: You might like
hara/event:
http://docs.caudate.me/hara/hara-event.html
HTH
On Wednesday, September 2, 2015 at 8:44:07 PM UTC-4, jo...@signafire.com
wrote:
>
> TLDR: how do you use Component when the application logic involves
>
Try to adapt my code:
https://gist.github.com/rauhs/63054a06631c0be598d3
where you change your accept function to incorporate:
http://stackoverflow.com/questions/813710/java-1-6-determine-symbolic-links
HTH
On Saturday, October 3, 2015 at 5:14:51 PM UTC-4, hpw...@gmail.com wrote:
>
> The
To add a little variant of James Reeve's code: You can avoid the loop/recur
by using reduce:
(defn valid-parens? [s]
(let [opening-brackets {\( \), \[ \], \{ \}}
closing-brackets (clojure.set/map-invert opening-brackets)]
(empty?
(reduce
(fn [stack c]
(if
That's described here:
https://github.com/clojure/core.match/wiki/Basic-usage#sequential-types
Use: [([1] :seq)]
On Friday, April 8, 2016 at 2:37:37 PM UTC+2, Russell Wallace wrote:
>
> How do you do pattern matching on lists in Clojure? I've tried using
> core.match but the examples all deal
Hi,
dedupe is almost what you need, but you can just copy the source and modify
it slightly:
(defn dedupe-by
"Similar to dedupe but allows applying a function to the element by which to
dedupe."
([f]
(fn [rf]
(let [pv (volatile! ::none)]
(fn
([] (rf))
One option is to use keep-indexed:
(first
(keep-indexed
(fn [i xs]
(first
(keep-indexed
(fn [j x]
(when (= x "5")
[i j]))
xs)))
players))
On Wednesday, December 7, 2016 at 5:32:10 PM UTC+1, Rickesh Bedia wrote:
>
> If I have
way.
On Thursday, December 8, 2016 at 11:13:42 AM UTC+1, Rickesh Bedia wrote:
>
> Is there a way to generalise?
>
> I.e a function that allows you to swap any of the 1-9?
>
> On Wednesday, 7 December 2016 18:06:19 UTC, Andy- wrote:
>>
>> One option is to use keep-indexed
for resources/
particular tips/any advice for improving Clojure skills. Does anybody have
any websites used for solving
Clojure problems? other than the most popular ones.
Wishing you the best of luck in life and coding.
best wishes fellow Clojurians,
Andy
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You can also get a REPL with https://coderpad.io/ . It even runs Clojure
1.9 and the editor has great VIM bindings.
If it asks you to register you can just start a new session in an incognito
window.
HTH
On Saturday, December 16, 2017 at 4:29:23 AM UTC+1, Didier wrote:
>
> Just realized that:
2009/2/27 Marko Kocić marko.ko...@gmail.com:
Interesting approach, nice explained.
Does anyone have similar example using one of the cells
implementations?
What would be pros/cons between this and cells approach?
The cells implementations I've seen posted to this list (in fact pretty much
this:
(require 'thalia.doc)
(thalia.doc/add-extra-docs!)
See the project page for a sample of the more detailed doc string you will
get if you do (doc ==):
https://github.com/jafingerhut/thalia
If you want to help write documentation like this, let me know.
Andy
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when I start the repl :
(defproject test 1.0.0-SNAPSHOT
:description FIXME: write description
:dependencies [[org.clojure/clojure 1.3.0]
[org.clojure/math.numeric-tower 0.0.2]])
:repl-options {
:init (clojure.core/use 'clojure.math.numeric-tower)}
andy
1.3.0]
[org.clojure/math.numeric-tower 0.0.2]])
:repl-options {
:dependencies [
[org.clojure/math.numeric-tower 0.0.2]]
:init (clojure.core/use 'clojure.math.numeric-tower)}
and the error I get is as follows :
andy@Aspire-V3
Ok valid point, but I still get the same kind of errors?
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yes, Ive seen that but it doesnt seem to help me greatly. Just out of
curiosity how do you generally setup your repl so it already includes these
kind of common libraries? I dont really want to be typing lots of 'use'
commands into the repl every time i start it. Is using leiningen the wrong
oops, you are right but if I paste into my project.clj I get a different
error when I run lein repl
andy@Aspire-V3-571:~/projects/clojure/test$ lein repl
Exception in thread main java.lang.IllegalArgumentException: No value
supplied for key: [:init (use (quote clojure.math.numeric-tower
as I can
tell):
http://www.eclipse.org/legal/eplfaq.php#USEINANOTHER
Andy
On Tue, Nov 19, 2013 at 11:16 PM, Andrey Antukh andrei.anto...@gmail.comwrote:
Hi agai Soan.
Repeating now: as I said previously, copyright notice of taken code should
to be present. And is my mistake from
Hi,
I am new to clojure and I was wondering if there is a macro I can use to
fully expand all symbols and macros in a form, without performing the final
evaluation of the built in functions?
Thanks
Andy
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It doesnt seem to expand function calls though right?
On Monday, 25 November 2013 12:55:27 UTC, Andy Smith wrote:
Hi,
I am new to clojure and I was wondering if there is a macro I can use to
fully expand all symbols and macros in a form, without performing the final
evaluation
In your example a full expansion might be : (. clojure.lang.Numbers (add 10
1))
On Monday, 25 November 2013 17:16:42 UTC, Guru Devanla wrote:
Hi Andy,
Not sure what you need in terms of function calls being expanded. Can you
provide an example.
Here is an silly example, even though
thanks for your helpful suggestions.
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To
structure. However, how does this actually work since a comparison of
hashes doesn't guarantee that two objects are equal. How does clojure
handle the case where two hashes are the same for two distinctly different
values.
Andy
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have a version of map that returns a vector when given a
vector? We can do this kind of thing in other languages with
templates/generics why not clojure?
There is obviously some basic principle/understanding that I am missing
here. This kind of thing surely cant be very efficient, can it?
Andy
])
Not this = (apply vector (map (partial * 2) [1 2 3]))
01.12.2013, 06:15, Andy Smith the4th...@googlemail.com javascript::
Hi,
I am trying to understand the manipulation of vectors from an efficiency
point of view. For example if I want to reverse a vector I can do the
following
(apply
of
indirection to avoid the need to copy elements of the original collection?
On Saturday, 30 November 2013 21:31:34 UTC, Jim foo.bar wrote:
On Sat, 30 Nov 2013 13:15:33 -0800 (PST)
Andy Smith the4th...@googlemail.com javascript: wrote:
but
my question is really about the more general case of any
Great point...
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You might be hitting a bug in Clojure 1.5.1 where it incorrectly attempts
to access elements in an empty stack trace, which I have seen occur. This
should be fixed in Clojure 1.6.0 alpha releases:
http://dev.clojure.org/jira/browse/CLJ-1102
Andy
On Tue, Dec 17, 2013 at 9:14 AM, Dmitry Groshev
into their copy of the library.
Andy
On Sun, Dec 22, 2013 at 2:33 PM, larry google groups
lawrencecloj...@gmail.com wrote:
I know this has been discussed before but I could not find anything like a
canonical answer via Google. I just set to
:warn-on-reflection true
in my project.clj
Mark Engelberg's Instaparse most likely does not have the same feature set
as Regexp::Grammars (I haven't checked in enough detail to learn the
differences), but they do likely have features in common:
https://github.com/Engelberg/instaparse
Andy
On Mon, Jan 6, 2014 at 9:04 PM, gvim gvi
.
Go squash some bugs!
Andy Fingerhut
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specify these :eastwood-arglists.
Thoughts?
Andy
On Mon, Jan 13, 2014 at 11:56 AM, Sean Corfield s...@corfield.org wrote:
Thanx for the specific example!
Yeah, I've used :arglists for examples in a couple of places instead of
actual argument lists. I'll fix that in 0.3.3 and may do the same
to something other
than what defn would make it.
For macros, they are all expanded during Eastwood analysis, so any
incorrect number of arguments should cause an exception to be thrown during
analysis, much like it would if you attempted to compile such code.
Andy
On Mon, Jan 13, 2014 at 6:57 PM
defn is a macro, and thus macro-expanded during Eastwood analysis, I
believe ignoring the :arglists. I think it is really only the :arglists of
functions that matter for Eastwood :wrong-arity warnings
Andy
On Mon, Jan 13, 2014 at 10:22 PM, Colin Fleming colin.mailingl...@gmail.com
wrote
is a bit more interactive
than a typical mailing list.
Andy
On Sun, Jan 19, 2014 at 11:46 PM, t x txrev...@gmail.com wrote:
Hi,
(apologies for spamming non-bay area people)
Is there an official site listing Clojure study-groups / meetups?
In particular, I'm looking for one close
in this was, why cant let be implemented as
a macro rather than a special form?
Where have I gone wrong in my understanding here?
Andy
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typo : was=way
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Excellent post, thank you for that.
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To
Why did you add that to your repositories?
You can do 'lein install' to install a project into your local Maven repo,
and by default Leiningen will check for local copies of JARs in your local
Maven repo before going out to the Internet to look for them.
Andy
On Thu, Jan 23, 2014 at 9:35 AM
Banned from the Clojure group for reason of spamming.
Andy
On Thu, Jan 23, 2014 at 1:11 PM, Sean Corfield s...@corfield.org wrote:
This company has been spamming various technical lists lately with this
same generic promotion. Can a moderator please report them for spam and ban
them
On Wed, Jan 22, 2014 at 5:29 PM, John Chijioke johnben...@gmail.com wrote:
Not true. More RAM, more power.
Why?
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best guess is that in order to have a hash function (in this case Clojure's
hash, implemented as a Java method called hasheq()) that is consistent with
Clojure =, it is difficult to make such a hash function correct and fast if
there were not these 3 separate categories.
Andy
On Mon, Jan 27, 2014
on appropriate
messages for the group. I have deleted some similar messages recently, but
someone else must have approved this message, because I did not.
Andy
On Mon, Jan 27, 2014 at 12:01 PM, Sean Corfield s...@corfield.org wrote:
SunitLabs has been spamming a lot of technical lists lately.
Do we
/dakrone/clojuredocs-client
Andy
On Tue, Jan 28, 2014 at 7:04 AM, Dave Tenny dave.te...@gmail.com wrote:
Does anybody happen to know where 'clojuredocs' is defined? I grepped the
clojure and leiningen git trees but the word didn't show up.
I noticed it mentioned in some leiningen tutorials
I'm not sure wether it is easy, but the 'reply' namespace was in one of the
symbols in your original email, and Leiningen's project.clj file lists its
dependencies, which include reply.
Andy
On Tue, Jan 28, 2014 at 7:41 AM, Dave Tenny dave.te...@gmail.com wrote:
Thank you.
Is there some
://dev.clojure.org/display/design/Better+hashing
Andy
On Sat, Nov 2, 2013 at 9:44 AM, Andy Fingerhut andy.finger...@gmail.comwrote:
A few minutes ago I finished copying, pasting, and doing a little
reformatting on Mark Engelberg's document on the subject.
http://dev.clojure.org/display/design
multi-argument predicate functions.
Andy
On Fri, Jan 31, 2014 at 8:44 AM, Ryan arekand...@gmail.com wrote:
Hello,
I am wondering if all my predicates should be one argument functions
because I run into a couple of cases where I needed more than one.
For example, I have a function called
(recur (dec n)
(map (partial reduce +) (partition 2 1 (concat [0] row [0]))) 500)
Andy
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Correction problem #97 I mean
On Monday, 3 February 2014 21:19:36 UTC, Andy Smith wrote:
Hi,
I am working through the 4clojure questions, I have a few different
solutions to problem 87 but all of them run out of stack space. I tried to
convert to using recur but I still have the problem
Ok thanks, thats really helpful. The second link suggests using doall,
which seems to do the trick :
((fn pascal ([n] (pascal n [1M])) ([n row] (if (= n 1) row (recur (dec n)
(map (partial reduce +) (doall (partition 2 1 (concat [0] row [0]
500)
However you do lose the laziness, but
Similarly this works for my non-recursive effort, which I think is more
concise :
(fn [n] (nth (iterate (fn [r] (map (partial reduce +) (doall (partition 2 1
(concat [0N] r [0]) [1]) (dec n)))
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To
object model on
one sheet. I suppose I can derive this from the source if not of course...
Andy
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Hi,
I was wondering why use/require and import take quoted forms as their
arguments, other alternatives could be strings or keywords, so what is
special about the choice of quoted form here?
Andy
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in my project.clj dependencies: [me.raynes/fs 1.4.3]
Andy
On Thu, Feb 6, 2014 at 9:11 PM, larry google groups
lawrencecloj...@gmail.com wrote:
I imagine this question has been asked a million times before, but I can
not find the answer.
I was looking at Raynes/fs library:
https://github.com
You may also use a let form wrapped around your entire defproject if you
want to avoid the duplication of code present in your example.
Andy
On Fri, Feb 7, 2014 at 8:22 AM, Lee Spector lspec...@hampshire.edu wrote:
On Feb 5, 2014, at 11:42 PM, Michał Marczyk wrote:
This returns
#(mod (% 1) 3) {:a 3, :b 6}))
clojure.lang.LazySeq
One would expect to (map #(mod % 3) #{3 6}) evaluate into #{0}. Is it
arbitrary decision or there is a theory behind it?
Best,
Andy
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user= (map #(mod % 3) #{3 6})
(0 0)
user= (set (map #(mod % 3) #{3 6}))
#{0}
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I do perceive sets, lists, vector as atoms which are indivisible (well,
this is not true but this is popular meaning) from semantics standpoint.
Therefore map is just a function which processes them as whole, again from
semantics point of view. Implementation and laziness should not matter
really
I actually like the laziness by default but as you suggest, wish there is a
way to switch it on/off for blocks of the code (rather than compiler
option). Scala guys did some research and in most practical cases Lists are
very short hence they are not lazy and evaluated at once. Just an
interesting
On Sat, Feb 8, 2014 at 12:06 AM, Sean Corfield s...@corfield.org wrote:
But you're misunderstanding what map does: it converts its collection
arguments to _sequences_ and then it processes those sequences. Map
doesn't operate on sets, or vectors, or maps, only on sequences.
Your assertion
Every persistent collection in Clojure supports conversion to the sequence
of items. This is clearly documented in the official docs and there is no
surprise here.
Would you mind to point me to that piece where doc describes what order seq
chooses when converting a set to it. (I honestly tried to
an equal result).
I was curious whether anyone knows whether Haskell has hash-based data
structures like this, and do they somehow guarantee referential
transparency? Perhaps by requiring the items to be sortable?
Andy
On Sat, Feb 8, 2014 at 8:19 AM, Jozef Wagner jozef.wag...@gmail.com wrote:
Every
First, thanks everybody for explanations of design decision behind map and
collections. I should in fact change subject to seq semantics ;-).
For me the bottom line is that while I do not care about order so much I
still can count on that seq function will produce consistent sequences. Or
wait a
On Sat, Feb 8, 2014 at 1:46 PM, Jozef Wagner jozef.wag...@gmail.com wrote:
Two collections equivalent by their values may easily have a different
order of their items.
It all boils down this:
is it possible to have two clojure.lang.PersistentHashSet with identical
values (in mathematical
user (= s1 s2)
true
user (= (seq s1) (seq s2))
false
Thx. If a=b then f(a) must = f(b). Something is broken here.
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It is working as designed.
If you do not want this, consider using sorted sets / sorted maps, where (=
s1 s2) implies (= (seq s1) (seq s2)).
Or, perhaps another programming language would be more to your liking.
Andy
On Sat, Feb 8, 2014 at 4:10 PM, Andy C andy.coolw...@gmail.com wrote
for all
the replies,
Best regards,
Andy
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:-). Deriving from Lisp wisdom and expanding those powerful
concepts into a modern programming is priceless.
It is all good now.
Pozdr,
Andy
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Note
/17b18350bdd28154241bc7ae80f423a5976c6de2on
Jan 30 2014 near the bottom of the table for some speed comparisons
versus the first column labeled Using Clojure 1.6.0-alpha3 hash (same as
Clojure 1.5.1).
http://dev.clojure.org/display/design/Better+hashing
Andy
On Fri, Feb 14, 2014 at 11:00 PM, tcrayford tcrayf...@gmail.com
(require 'clojure.string)
Im just wondering why the language chose to use the quote form, rather than
a string or a keyword e.g.
(require clojure.string)
(require :clojure.string)
There obviously must be a good reason why.
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or the cost of calling virtual methods is
negligible.
I probably should check out generated JVM byte code to see the answer
firsthand but still would appreciate a higher level answer.
Thanks in advance,
Andy
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recommend going crazy with it, but it should be able to do the
job, at least after the alter-var-root takes effect.
Out of curiosity, what kind of linting does your function do?
Andy
On Tue, Feb 18, 2014 at 8:41 PM, t x txrev...@gmail.com wrote:
With apologies for spamming:
Solutions
= (println (disassemble (fn [])))
java.lang.NullPointerException
at
org.eclipse.jdt.internal.core.util.ClassFileStruct.u4At(ClassFileStruct.java:61)
at
org.eclipse.jdt.internal.core.util.ClassFileReader.init(ClassFileReader.java:76)
Andy
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(being not a native
speaker does not help). I actually tried it as a plugin but something else
came into play so it did not work :$
Best,
Andy
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Note
The OP almost certainly intended CLISP to mean Common Lisp.
I recall it now - it was Allegro CL which somebody demoed to me almost ten
years ago. I wish I started learning Lisp yet cannot believe that Clojure I
am learning now (and Scala I am actively using) did not exist back then.
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to achieve?
Andy
On Thu, Feb 20, 2014 at 2:59 PM, Jules jules.gosn...@gmail.com wrote:
So, having broken the back of fast re-combination of hash sets and maps, I
wanted to take a look at doing a similar sort of thing for vectors -
another type of seq that I use very heavily in this sort
identical objects.
Andy
On Wed, Feb 26, 2014 at 11:11 AM, Brian Craft craft.br...@gmail.com wrote:
Ok, trying a different way of asking this:
Is it common practice in clojure to write data transforms in a way that
will return the same object when possible (when the transform would be a
noop
transformed data structure is identical to the
original, but a large fraction of the sub-structures are, so if you do a
diff like comparison of an older structure and a newer one, you will find
many identical sub-structures.
Andy
On Wed, Feb 26, 2014 at 6:14 PM, Andy Fingerhut andy.finger
Hi,
Can someone correct my misunderstanding here. I was lead to believe that
map produced a lazy sequence, so why do I get three printed trace lines in
the following code :
user= (take 1 (map #(do (println (str trace: %)) %) [1 2 3]))
(trace:1
trace:2
trace:3
1)
Thanks for your help
Andy
doh!, thanks for the above. I actually did read this a few weeks ago but
totally forgot about it. :o/
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