Re: org-mode Clojure babel

[Johannes Brauer]

thanks for the hint; indeed it works
Am 21.12.2015 um 16:12 schrieb martin_clausen 
mailto:martin.clau...@gmail.com>>:

I found that

Org-mode version 8.3.2 and CIDER 0.11.0 snapshot (package: 20151212.1044)

works great and can be easily be installed from repos.

On Sunday, December 20, 2015 at 6:16:15 PM UTC+1, Johannes wrote:
Thanks, for the explanations. I hope for the best, that there will be an 
working org-babel version in the future. In the mean time I will continue using 
lentilc.

Johannes
Am 10.12.2015 um 16:24 schrieb Matching Socks 
http://gmail.com/>>:

The latest stable Org Babel stopped working with the introduction of Cider 
0.10.0.

You can either go back to Cider 0.9.1, or
(1) get Org 8.3.2,
(2) git-clone Org's repo, and
(3) back-port to 8.3.2 the change in ob-clojure.el that accommodates the latest 
Cider.

The breakage was raised at https://github.com/clojure-emacs/cider/issues/1302 
and closed with a comment, "I don't have nor the time nor the energy to sync up 
with everyone maintaining a 3rd party extension. I just hope they're following 
the development and will do the necessary changes when needed."

But three considerations, which are not Cider's fault, argue for a kinder 
accommodation.  First, Org freezes for bundling into a major Emacs release only 
a few times a century, and the resulting Emacs release then enjoys wide 
distribution for many years.  Second, the bundled Org is unusually significant 
because overriding it with another version is not always fool-proof.  Third, 
Org with Clojure snippets is dynamite!  Therefore, I hope Org will get advice 
from Cider about a more durable technique, so the next Emacs+Org release might 
be useful even on the glacial Emacs time scale.


On Tuesday, November 3, 2015 at 3:25:51 AM UTC-5, Johannes wrote:
Hi,

I am looking for a working environment for using org-mode with Clojure babel. 
Googleing for the issue I can only find some apparently outdated hints. I am 
using org-mode version 8.2.10, Clojure 1.6.0, Leiningen 2.5.1, and CIDER 0.10.0.

Any hints, where I can find the right configuration?

Johannes


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Staatlich anerkannte private Fachhochschule
NORDAKADEMIE
Gemeinnützige Aktiengesellschaft
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Sitz:
Elmshorn, Amtsgericht Pinneberg, HRB 1682

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Can I use Clojure to build a mobile chat application?

[симон]

My project is to use build a simple chat client and I thinking of using 
clojure since it is the language am currently learning. And am liking it.


I don't know weather this is possible and what the possibilities/challenges 
are.


I need advice or suggestions on what projects else I can do with clojure as 
I just started learning it now and would need some more experience to 
decide.

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Re: is this macro right?

[Jacob Goodson]

It says that a number cannot be cast to a function.

(3 4)

The number 3 is not a function, thus the reason for the error.

On Monday, December 28, 2015 at 3:47:39 AM UTC-5, Mian Pao wrote:
>
>
> http://stackoverflow.com/questions/34448773/is-function-print-has-bug-in-clojure
>

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Re: Possible bug in AOT-compiled Clojure when ns-unmap is used

[Stuart Sierra]

AOT-compilation breaks almost any code that tries to redefine Vars. I 
wouldn't expect this to work.
—S


On Monday, December 28, 2015, wparker30 wrote:
>
> I have found what appears to be a bug in AOT-compiled Clojure when 
> ns-unmap is used.  I have the following reduced case:
>
> (ns unmap-test.core)
>
> (def a :test-1)
>
> (ns-unmap 'unmap-test.core 'a)
>
> (def a :test-2)
>
> It turns out that a is not resolvable when this namespace is loaded.  When 
> I looked at the compiled bytecode,
> it appears that the following operations occur:
>
> 1. A call to RT.var withe 'unmap-test.core and 'a returns a Var, which is 
> bound to a constant.
>   This var is added to the namespaces's mapping during this call.
> 2. Same as 1.
> 3. The var from 1 is bound to :test-1.
> 4. ns-unmap is called.
> 5. The var from 2 is bound to :test-2.
>
> Disclaimer: This is the first time I have had occasion to look directly at 
> bytecode and I could be missing something.
>
> The basic problem here is that the var is accessible from the load method, 
> but when step 5 executes the var is no longer
> accessible from the namespace mappings.  Thus, the root of the Var is set 
> to :test-2, but that Var is not mapped from the namespace.
> This works when there is no AOT compilation, as well as when I use 
>
> (ns unmap-test.core)
>
> (def a :test-1)
>
> (ns-unmap 'unmap-test.core 'a)
>
> (intern 'unmap-test.core 'a :test-2)
>
> I realize that creating defs, unmapping them, and then recreating them is 
> generally poor practice in Clojure.
> We have an odd case in that we need to have an interface and a Var of the 
> same name in the same namespace.  Simply
> doing definterface and then def causes a compilation failure:
>
> user=> (definterface abc)
> user.abc
> user=> (def abc 1)
> CompilerException java.lang.RuntimeException: Expecting var, but abc is 
> mapped to interface user.abc, 
> compiling:(/private/var/folders/3m/tvc28b5d7p50v5_8q5ntj0pmflbdh9/T/form-init4734176956271823921.clj:1:1)
>  
>
> Without going into too much detail, this is basically a hack to allow us 
> to refactor our internal framework code
> without immediately changing a very large amount of downstream consumer 
> code.  We get rid of the usage of the interface during macroexpansion,
> but it still needs to exist on the classpath so it can be imported by 
> downstream namespaces.  
> There are a number of other ways to accomplish this, so it isn't a 
> particularly big problem for us, but I thought the issue was worth raising.
> This was just the first thing I tried and I was surprised when it didn't 
> work.
>
> Note that I used the 1.8.0 RC4 version of Clojure in my sample project, 
> but I had the same behavior on 1.7.0.
>
> Relevant links:
>
> 1. Bytecode for the load method of the init class: 
> https://gist.github.com/WilliamParker/d8ef4c0555a30135f35a
> 2. Bytecode for the init0 method: 
> https://gist.github.com/WilliamParker/dc606ad086670915efd9
> 3. Decompiled Java code for the init class.  Note that this does not 
> completely line up with the bytecode as far as I can tell,
> but it is a quicker way to get a general idea of what is happening than 
> the bytecode.
> https://gist.github.com/WilliamParker/4cc47939f613d4595d94
> 4. A simple project containing the code above: 
> https://github.com/WilliamParker/unmap-test
> Note that if you try it without AOT compilation the target folder with any 
> previously compiled classes should be removed.
>
> I may or may not be able to respond to any replies before next week; I 
> apologize for any delayed responses.
>

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[ANN] 18th Tutorial of the modern-clsj series

[Mimmo Cosenza]

Hi all,
just before my vacation, I published the 18th tutorial of the modern-cljs 
series. It uses a TDD environment  augmented with REPLs to show how experiment 
within the CLJS REPL in the middle of a TDD workflow.

https://github.com/magomimmo/modern-cljs/blob/master/doc/second-edition/tutorial-18.md
 


HIH

Happy new year to all of you!

Mimmo

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boot-cljs-test: why is my test not included when tests are run?

[fahptv]

Hello again

git clone https://github.com/frankhenderson/boot-cljs-test-question

install boot

run: boot auto-test

Why does it say there are 0 tests instead of 1?

Thanks in advance!

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Re: Project structure when using reader conditionals

[Alan Moore]

Yes it would be handy for small projects but IMO larger applications should 
be broken up into client and server code. Some might argue for breaking up 
client and server into separate projects altogether but that begs the 
question about what to do with the .cljc files that are shared (e.g. put 
them in shared library(ies)?) Again, this probably depends on codebase 
size, granularity of your deployment and other considerations beyond just 
the compiler.

For now I'm sticking with keeping the .cljc files in the src/clj tree. I'd 
like to hear what others are doing as well.

Did you ask this on the clojurians slack channel? It seems a lot of the 
more chatty/Q&A traffic for this list has gone over there.

Alan

On Friday, December 25, 2015 at 1:00:58 PM UTC-8, Dru Sellers wrote:
>
> Is it fair to say that the accepted pattern now (with reader conditionals) 
> is to have a single src/ directory and then letting the file extension 
> (cljs,clj,cljc) do the heavy lifting rather than having a directory for 
> each?
>
> that would be handy if so. 
>
> -d
>
>
> On Friday, May 29, 2015 at 3:10:30 PM UTC-5, Daniel Compton wrote:
>>
>> When porting a library to reader conditionals, I found that I only needed 
>> one source directory for all my cljc and .clj files. Cljsbuild just picks 
>> up the ones it needs and leaves the .clj ones. 
>>
>> So in some cases it may not be necessary to have a clj/, cljs/, and cljc/ 
>> folder, although in applications this structure might make more sense. 
>> On Fri, 29 May 2015 at 10:31 pm Robin Heggelund Hansen <
>> skinn...@gmail.com> wrote:
>>
>>> No, it doesn't. I update with `lein ancient update :all` and committed 
>>> without checking if it worked. It's fixed locally :)
>>>
>>>
>>> fredag 29. mai 2015 12.01.32 UTC+2 skrev Colin Yates følgende:
>>>
 Thanks Robin, that was helpful. I notice that you are using garden 
 1.2.6 - that throws a CNF for garden.core and the garden page recommends 
 not using it - does it work for you?

>>> On 29 May 2015, at 10:49, Robin Heggelund Hansen  
 wrote:

 Take a look at my project.clj file.

 https://github.com/Skinney/oslo-programmene/blob/development/project.clj

 fredag 29. mai 2015 11.17.25 UTC+2 skrev Colin Yates følgende:
>
> In the vein of "there are no stupid questions" :), how does one 
> structure a combined clj and cljs project that uses reader conditionals? 
> At 
> the moment I am using cljx and have:
>  - src/clj for clojure files
>  - src/cljs for clojurescript files
>  - src/cljx for cljx 
>  - target/cljx/clj for clojure files compiled (transpiled?) from cljx
>  - target/cljx/cljs for clojurescript files compiled (transpiled?) 
> from clix
>
> On the source path in cljsbuild for example I have src/cljs and 
> /target/cljx/cljs
>
> To remove cljx and use reader conditionals is it sufficient to:
>  - replace src/cljx with src/cljc 
>  - remove target/cljx from cljsbuild source path
>  - add src/cljc to cljsbuild source path
>  - add src/cljc to leiningen source path
>
> Thanks!
>

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Re: Can I use Clojure to build a mobile chat application?

[William la Forge]

Here's a chat demo written in 
clojure/clojurescript: https://github.com/hoplon/demos/tree/master/castra-chat

It is a pretty basic starting point, but it does show how to do a reactive 
(mobile compatible) web chat. And for a school project it is likely fine.

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