My lab is developing a new probabilistic programming language, embedded in Clojure. (More on this soon.) As part of the process of developing tutorial material for this language, I'm trying to get lein-jupyter and clojuypter working with this project. I'm a Clojure novice, and a clojuypter novice, so I may be missing something basic. Right now I can't seem to access functions defined in clojure.core from clojuypter. Here is an input/output example from within lein repl:

user=> (boolean? true)
true

In [1]: (boolean? true)
CompilerException java.lang.RuntimeException: Unable to resolve symbol: boolean? in this context, compiling:(null:1:1) 

Hi All. Had a small clojure question: Why doesn't this line work: (let [x 1] (eval (read-string "(str x)")))? It throws the following error: CompilerException java.lang.RuntimeException: Unable to resolve symbol: x in this context, compiling:(null:1:1)

@punit-naik https://stackoverflow.com/questions/6221716/variable-scope-eval-in-clojure

@vkm I just installed lein-jupyter and I’m able to run (boolean? true). whats your project.clj look like?

given that the boolean? function was added in clojure 1.0, the likely issue here is some error in creating the initial namespace the notebook started with

if you ask lein to switch to a namespace at init that wasn't created properly you can end up with a situation where clojure.core isn't available

there should be some error message about loading the initial namespace (or something it loaded...) and that's the real issue

(clojure.core/refer-clojure) followed by (require 'my.ns :reload) is likely to show you the error

The boolean? predicate was introduced in 1.9, right?

ugh, you are right! typo

+user=> (meta #'boolean)
{:arglists ([x]), :doc "Coerce to boolean", :inline #object[clojure.core$boolean__inliner__5416 0x6e4566f1 "clojure.core$boolean__inliner__5416@6e4566f1"], :added "1.0", :line 1597, :column 1, :file "clojure/core.clj", :name boolean, :ns #object[clojure.lang.Namespace 0x5e4bd84a "clojure.core"]}
+user=> (meta #'boolean?)
{:arglists ([x]), :doc "Return true if x is a Boolean", :added "1.9", :line 519, :column 1, :file "clojure/core.clj", :name boolean?, :ns #object[clojure.lang.Namespace 0x5e4bd84a "clojure.core"]}

thanks for catching that

I thought it was a 1.9 addition, then double checked, but I should have double checked my double check :D

@lilactown (defproject metaprob "0.1.0-SNAPSHOT" :description "FIXME: write description" :url "http://example.com/FIXME" :license {:name "GNU General Public License Version 3, 29 June 2007" :url "http://www.gnu.org/licenses/"} ;; Default stack size is 1MB or less, increase to 50 :jvm-opts ["-Xss50M"] :dependencies [[org.clojure/clojure "1.9.0"] [kixi/stats "0.4.0"] [criterium "0.4.4"] [org.apache.commons/commons-math3 "3.6.1"] [incanter "1.9.3"] [org.clojure/math.numeric-tower "0.0.4"]] :plugins [[lein-jupyter "0.1.16"]] ;; :aot [metaprob.basic-trace] )

OK, since you are using 1.9, is clojure.core loaded properly? I'd go back to my broken ns theory in that case.

https://clojurians.slack.com/archives/C03S1KBA2/p1532914314000023

@noisesmith When I create a new project, lein chooses 1.8.0 by default. Could that be related?

what matters is the project that is actually running

it's simple to test that in a repl too though *clojure-version*

or clojure.core/*clojure-version* since in a broken ns the first one wouldn't work

@noisesmith Did you mean (require 'my.ns :reload) literally? Or did you mean for me to replace my.ns with some namespace from my project that references boolean?

@noisesmith (I assume the latter)

I mean your init-ns - the ns that your project wants to load at startup

@noisesmith Progress! It appears that despite my project.clj depending on 1.9.0, the Clojure version I am ending up with from lein jupyter notebook is 1.8.0:

clojure.core/*clojure-version*
=> {:major 1, :minor 8, :incremental 0, :qualifier nil}

vikash, where are you running that command?

lein jupyter notebook

@lilactown @noisesmith Here is a transcript showing how the juypter notebook appears to be starting with a different clojure version than lein repl:

Vikashs-MacBook-Air:metaprob-clojure vkm$ pwd
/Users/vkm/metaprob-clojure
Vikashs-MacBook-Air:metaprob-clojure vkm$ cat project.clj
(defproject metaprob "0.1.0-SNAPSHOT"
  :description "FIXME: write description"
  :url ""
  :license {:name "GNU General Public License Version 3, 29 June 2007"
            :url ""}
  ;; Default stack size is 1MB or less, increase to 50
  :jvm-opts ["-Xss50M"]
  :dependencies [[org.clojure/clojure "1.9.0"]
                 [kixi/stats "0.4.0"]
                 [criterium "0.4.4"]
                 [org.apache.commons/commons-math3 "3.6.1"]
		 [incanter "1.9.3"]
		 [org.clojure/math.numeric-tower "0.0.4"]]

  :plugins [[lein-jupyter "0.1.16"]]

  ;; :aot [metaprob.basic-trace]
  )
Vikashs-MacBook-Air:metaprob-clojure vkm$ jupyter-console --kernel clojure
Jupyter console 5.0.0

Clojupyters-0.1.0


In [1]: (println *clojure-version*)
{:major 1, :minor 8, :incremental 0, :qualifier nil}

In [2]:                                                                                                                                                                                          
Do you really want to exit ([y]/n)? y
Shutting down kernel
Vikashs-MacBook-Air:metaprob-clojure vkm$ lein repl
nREPL server started on port 63907 on host 127.0.0.1 - 
REPL-y 0.3.7, nREPL 0.2.12
Clojure 1.9.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_151-b12
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
    Exit: Control+D or (exit) or (quit)
 Results: Stored in vars *1, *2, *3, an exception in *e

user=> (println *clojure-version*)
{:major 1, :minor 9, :incremental 0, :qualifier nil}
nil
user=> 

@lilactown @noisesmith Aha, it looks like my original bare clojupyter install (as opposed to my lein-juypter install) may have been pulling the wrong clojure version. When I start "lein juypter notebook" from that directory, and manually choose the kernel type to be "lein-clojure", I get version 1.9.

@lilactown @noisesmith Thanks for the help! I really appreciate it. I've gotten something minimal running now, and am on to debugging incanter plotting in lein-jupyter (as opposed to clojuypter, where it works out of the box).

I suspect there isn't due to it not being listed on https://clojure.org/guides/reader_conditionals but is there an approach for doing something like:

#?([:clj :cljs] (inc x)
   :cljr (.incInterop x))

Looks like someone proposed boolean login in https://dev.clojure.org/display/design/Reader+Conditionals

@dominicm I also suspect there is not, but have you tested with something like this? #?(:cljr (.incInterop x) :default (inc x)) ?

@andy.fingerhut yeah, in this case it works. I'm thinking about it's use in scenarios like https://shadow-cljs.github.io/docs/UsersGuide.html#_conditional_reading though. Particularly once you have quite a few js platforms where there is 3 branches, for example. Also evaluating it for use in config files.

Hi All, I had a small question. How to change the context of lein run from null to any other namespace?

@punit-naik from the doc:

...
USAGE: lein run -m NAMESPACE[/MAIN_FUNCTION] [--] [ARGS...]
Calls the main function in the specified namespace. You may have to use -- to
escape the first argument in case it begins with `-' or `:'.

how mature is clojupyter? this is my first time hearing about it

Can anyone recommend a good map based database like library? I'm using https://github.com/riverford/compound at the moment, which keeps track of multiple indexes, but there isn't any sort of joining between indexes or compounds. Ideally it would be something with a pretty good query language, but datascript doesn't really suit, because I want queries to be fast enough I can re-run all queries when the database changes. Writes don't have to be fast, so I'm imgining something that just writes to many indexes.

I suppose what I really want is reactive datascript materialized views... 😛

@ghopper what you want is what is known as a production rules system, or a rete network.

https://github.com/cerner/clara-rules is one example

naga is another: https://github.com/threatgrid/naga

Hmm, I've heard of this before. I'll have to look into it more. Thanks!

Databases assume that your queries will change very often (or be ad-hoc), but that your data will change less often. Rules engines (most of which are based on Rete networks) assume that your rules (or queries) will remain static, but that your data changes a lot.

So with a rules engine, you define a bunch of rules at the start, and then flow data into the engine, the engine will call callbacks when rules have new results

That's a very helpful distinction that I hadn't heard before.

Hi you all

I'm having trouble here

trying to compile a robocode robot from clojure

Is this the right place to get help?

I'm getting a stacktrace when robocode try to initialise my bot

I'm packing the robot class with clojure itself, using lein uberjar

robocode then initialises the class (in my case is supimpabots.RichardTheLizard class)

but fails

Here's the stackstrace:

java.lang.ExceptionInInitializerError
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at clojure.lang.RT.classForName(RT.java:2204)
	at clojure.lang.RT.classForName(RT.java:2213)
	at clojure.lang.RT.loadClassForName(RT.java:2232)
	at clojure.lang.RT.load(RT.java:450)
	at clojure.lang.RT.load(RT.java:426)
	at clojure.lang.RT.doInit(RT.java:468)
	at clojure.lang.RT.<clinit>(RT.java:336)
	at clojure.lang.Namespace.<init>(Namespace.java:34)
	at clojure.lang.Namespace.findOrCreate(Namespace.java:176)
	at clojure.lang.Var.internPrivate(Var.java:153)
	at supimpabots.RichardTheLizard.<clinit>(Unknown Source)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at java.lang.Class.newInstance(Class.java:442)
	at net.sf.robocode.host.security.RobotClassLoader.createRobotInstance(RobotClassLoader.java:256)
	at net.sf.robocode.host.proxies.HostingRobotProxy.loadRobotRound(HostingRobotProxy.java:171)
	at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:210)
	at net.sf.robocode.host.proxies.BasicRobotProxy.run(BasicRobotProxy.java:44)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.FileNotFoundException: JAR entry clojure/core_instant18__init.class not found in /home/tiago/robocode/robots/supimpabots.RichardTheLizard-0.0.0.1-standalone.jar
	at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:144)
	at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:152)
	at clojure.lang.RT.lastModified(RT.java:403)
	at clojure.lang.RT.load(RT.java:441)
	at clojure.lang.RT.load(RT.java:426)
	at clojure.core$load$fn__6548.invoke(core.clj:6046)
	at clojure.core$load.invokeStatic(core.clj:6045)
	at clojure.core$load.doInvoke(core.clj:6029)
	at clojure.lang.RestFn.invoke(RestFn.java:408)
	at clojure.core$fn__8055.invokeStatic(core.clj:6709)
	at clojure.core$fn__8055.invoke(core.clj:6708)
	at clojure.core__init.load(Unknown Source)
	at clojure.core__init.<clinit>(Unknown Source)
	... 23 more

This line might be relevant: Caused by: java.io.FileNotFoundException: JAR entry clojure/core_instant18__init.class not found in /home/tiago/robocode/robots/supimpabots.RichardTheLizard-0.0.0.1-standalone.jar

clojure/core_instant18 is packed as clojure code

It seems that clojure classes are not being compiled?

the jar

@mrdalloca What's in your project.clj file?

(I suspect it's a combination of AOT and different versions of Clojure being loaded -- Clojure 1.10 no longer has the instant18 namespace because it's guaranteed to have Java Time due to requiring Java 8)

@mrdalloca - I created new project and mine project.clj look lie this: (defproject robocop "0.1.0-SNAPSHOT" :description "FIXME: write description" :url "http://example.com/FIXME" :license {:name "Eclipse Public License" :url "http://www.eclipse.org/legal/epl-v10.html"} :dependencies [[org.clojure/clojure "1.9.0"] [net.sf.robocode/robocode.api "1.9.2.1"]] :main ^:skip-aot robocop.core :target-path "target/%s" :profiles {:uberjar {:aot :all}})

I am able to build uberjar without any issue

I have a weird issue on 1.9.0 start happening. NoClassDefFound for com/stuartsierra/component/Lifecycle.class in my main class. My main class is AOT compiled and requires com.stuartsierra.component, and if I run clojure.main with the uberjar, I can require it manually and see Lifecycle.

(only my main class is AOT compiled)

I can, in fact, run clojure.main and require my main namespace without an issue.

@phoenixai2082 the problem is not with lein uberjar

I'm able to compile the uberjar with no problems

Hi, can anyone help me how to use bitpay-java-api in clojure? https://mvnrepository.com/artifact/ccfontes/bitpay-java-api/1.0

@seancorfield, I'm packaging clojure 1.9.0 with the jar

@blazekm1lan bitpay seems to have made its own java lib: https://github.com/bitpay/java-bitpay-client

@jonahbenton I thought it is only wrapper. How do I include it inside project.clj?

@mrdalloca Can you put your project up on GitHub so we can clone it and try to repro/debug?

@seancorfield sure!

will do it

@seancorfield

https://github.com/MrDallOca/supimpabots

To reproduce the bug, unzip the file, start robocode with ./robocode, import the standalone jar generated with lein uberjar (`Robot > Import robot or team`), create a new battle (`Battle > New`) and select RichardTheLizard and other bot.

@mrdalloca It's a combination of a bug in Clojure 1.9 and a bug in you robot code I think. First off, you haven't defined the -init function to perform the initialization. With that in place, it all works for Clojure 1.8.0 and for Clojure 1.10.0-alpha6.

Not quite sure what's going on with 1.9 but in the uberjar there are these files

clojure/core__init.class
clojure/core_deftype.clj
clojure/core_deftype__init.class
clojure/core_instant18.clj
clojure/core_print.clj
clojure/core_print__init.class
clojure/core_proxy.clj
clojure/core_proxy__init.class

This may be a dumb question, but if I want to return app version when called with -v, how can I make this automatically return the version from project.clj

My google-fu found some kind of solution. 🙂

@roklenarcic I think the most common way I've seen this done is to have a version file in your resources folder and for both project.clj and your app code to read that in to set the version (`project.clj`) and return the version (your app).

Ended up doing what amalloy answered on stackoverflow

reading version from META-INF