Re: Clojure/West (Portland, Mar 18-20) - Mission Kontrol, unsessions, lightning talks

[Rich Morin]

On Feb 6, 2013, at 21:07, Leonardo Borges wrote:
> Where can we find more about this datomic hack session?

Sorry, it appears that I only posted about this to the Datomic list:

  There will be some unconference sessions Monday evening, so I'll try to
  schedule something then for Codeq / Datomic.  However, those sessions
  will be pretty short, so I'm still planning to do a hack session Sunday
  afternoon from 3-6 (or so :-).

  I probably won't have a specific location until Sunday afternoon, so my
  plan is to leave some cookie crumbs lying about.

  *  a relevant tweet, eg:

   The #datomic hack session at #clojurewest is located at ___.
   Look for the ___.

  *  a note on a message board and/or front desk, eg:

   Datomic hack session, 3-6 pm, ___

  This is a good-sized hotel, so I'm pretty sure we'll be able to find a
  spot to hang out (eg, in the main lobby).  Worst case, a few of us can
  meet in my hotel room.  After the session, I'll lead a dinner run.

If anyone is arriving earlier and wants to help with logistics, contact me
(off-list) so we can coordinate...

-r

 -- 
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http://www.cfcl.com/rdm/resume r...@cfcl.com
http://www.cfcl.com/rdm/weblog +1 650-873-7841

Software system design, development, and documentation


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Re: mysql auth issue when using upstart for ring

[Michael Wood]

Hi

On 7 February 2013 09:12, Omer Iqbal  wrote:
> Hey, I used a similar upstart script which works fine for ring.
> However, weirdly enough, my auth with a mysql database fails. I'm using
> korma to interface with the db. The problem only occurs with upstart
> script,, because it works fine when I run it myself.
> To be clearer. When I run: lein trampoline run/lein ring server, my db
> connects fine.
> However, I use the following upstart script:
>
> start on startup
> start on runlevel [2345]
> stop on runlevel [!2345]
> chdir /home/ubuntu/www
> setuid ubuntu
> exec lein trampoline run > out.log 2>&1
>
> When I run the daemon, ring runs fine. However, when it communicates with
> the mysql server, it throw the following exception (amongst a sea of stack
> traces): "java.sql.SQLException: Access denied for user 'root'@'localhost'
> (using password: NO)"
>
> This is weird because my korma config does supply a password, and it works
> fine when I run lein run myself. However for reference sake, I check for an
> environment variable(CLJ_ENV) to decide which config to use. SInce the only
> differentiating factor is upstart, my assumption is that the problem is due
> to setuid. But to be honest, I have no idea what's going wrong.

See this:

http://upstart.ubuntu.com/cookbook/#environment-variables

In particular this part:

"Note that a Job Configuration File does not have access to a user's
environment variables, not even the superuser. This is not possible
since all job processes created are children of init which does not
have a user's environment."

I suspect that has something to do with the problem.

> Oh, and for clarification this is all on an aws machine running Ubuntu
> Server 12.04 LTS.
> Any ideas on whats going on?


-- 
Michael Wood 

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Re: [ANN] Morph v0.1.0 Monads & friends: pure functions, less boilerplate

[Marek Šrank]

btw, have you seen https://github.com/jduey/protocol-monads ?

Marek

On Thursday, February 7, 2013 1:06:39 AM UTC+1, Armando Blancas wrote:
>
> Morph is a new implementation of monads based on protocols. It's intended 
> to provide the common patterns of error-handling, short-circuit sequencing, 
> and modeling of stateful computations in pure functions. I've tried to make 
> this library idiomatic while keeping it close to its Haskell roots.
>
> This is a utility library that, I hope, can make your coding easier. No 
> particular knowledge is assumed or required. The docs name things but rely 
> on getting an intuitive feeling of what's going on. Protocols are relevant 
> only if you want to write your own plumbing, which shouldn't be difficult; 
> otherwise it's all ready to use.
>
> Project:   https://github.com/blancas/morph
> User Guide: https://github.com/blancas/morph/wiki
> Codox API:  http://blancas.github.com/morph
>
> Please use the project wiki for feedback, bug reports, or feature requests.
>
>

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Re: Prismatic Plumbing and Graph Open-Source Release

[Edmund]

Hey Aria / Jason,

  Thanks for OSing this library, its really useful.  One question: how do 
you deal with nesting on the output side of graph declaration ?  I 
understand it for fnk, but but how would I achieve:

{:a {:b 1}} -> {:a {:b 1, :c 2}}

with a single declaration:

(graph/eager-compile
 {??? (fnk [[:a b]] (inc b))}

where ??? is the binding form I'm after to describe the nesting ?  

I'm currently doing this by breaking up my map and using update-in, but it 
seems you must have a sneaky trick to do this declaratively ?

I figure [:a :c] would be an possible syntax ?

Thanks again,

 Edmund
On Tuesday, 29 January 2013 18:46:54 UTC, Aria Haghighi wrote:
>
> Hey all,
>
>  Prismatic has open-sourced our Plumbing and Graph library on 
> github. 
> Jason Wolfe gave a 
> talkabout
>  how we use graph for systems composition at Strange loop last year. 
> Please give the library
> a whirl and let us know if you're using it and if you find any issues or 
> feature requests. We use this library very heavily throughout our code and 
> hope others find it useful as well.
>
>  Best, Aria
>

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Re: mysql auth issue when using upstart for ring

[Omer Iqbal]

Thanks Michael. That was the problem!

On Thu, Feb 7, 2013 at 5:20 PM, Michael Wood  wrote:

> Hi
>
> On 7 February 2013 09:12, Omer Iqbal  wrote:
> > Hey, I used a similar upstart script which works fine for ring.
> > However, weirdly enough, my auth with a mysql database fails. I'm using
> > korma to interface with the db. The problem only occurs with upstart
> > script,, because it works fine when I run it myself.
> > To be clearer. When I run: lein trampoline run/lein ring server, my db
> > connects fine.
> > However, I use the following upstart script:
> >
> > start on startup
> > start on runlevel [2345]
> > stop on runlevel [!2345]
> > chdir /home/ubuntu/www
> > setuid ubuntu
> > exec lein trampoline run > out.log 2>&1
> >
> > When I run the daemon, ring runs fine. However, when it communicates with
> > the mysql server, it throw the following exception (amongst a sea of
> stack
> > traces): "java.sql.SQLException: Access denied for user 'root'@
> 'localhost'
> > (using password: NO)"
> >
> > This is weird because my korma config does supply a password, and it
> works
> > fine when I run lein run myself. However for reference sake, I check for
> an
> > environment variable(CLJ_ENV) to decide which config to use. SInce the
> only
> > differentiating factor is upstart, my assumption is that the problem is
> due
> > to setuid. But to be honest, I have no idea what's going wrong.
>
> See this:
>
> http://upstart.ubuntu.com/cookbook/#environment-variables
>
> In particular this part:
>
> "Note that a Job Configuration File does not have access to a user's
> environment variables, not even the superuser. This is not possible
> since all job processes created are children of init which does not
> have a user's environment."
>
> I suspect that has something to do with the problem.
>
> > Oh, and for clarification this is all on an aws machine running Ubuntu
> > Server 12.04 LTS.
> > Any ideas on whats going on?
>
>
> --
> Michael Wood 
>
> --
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Re: [ANN] Kern 0.5.0 -- A text-parsing library

[Ragnar Dahlén]

Hi Armando,

Thank you for your great work with this library! I don't have much previous 
experience with parser combinators, but with your implementation, and the 
wonderful documentation, I've had a lot of fun playing and learning.

I've been hacking on a small project for implementing a subset of HAML for 
Clojure, with the goal of using HAML instead of HTML for enlive templates. 
It is very early days, but if you're interested, I'd be very happy for any 
feedback on the parser, which uses kern. I've probably done a lot of stupid 
stuff.

Project:
https://github.com/ragnard/hamelito

Parser:
https://github.com/ragnard/hamelito/blob/master/src/hamelito/parsing.clj

Best regards,

Ragnar


On Monday, 21 January 2013 18:27:07 UTC, Armando Blancas wrote:
>
> Kern is a text-parsing library based on Parsec, the Haskell monadic 
> combinators library. It is useful for parsing all kinds of text: data, 
> program input, configuration files, DSLs, or a full-blown programming 
> language.
>
> My main goal is, like the Self folks, the power of simplicity. In the 
> ideal case the grammar is the implementation, but I'm OK with something 
> close. Next comes performance, which appears to be fine with hot code but 
> not great otherwise. Let me know and will see what I can do.
>
> https://github.com/blancas/kern
>
> The wiki has a user's guide, tutorials, and links to several samples; will 
> be adding some more topics there. There's also a Codox API zip file 
> available for download. Feedback, suggestions, requests, bug reports are 
> all very welcome; please use the project wiki.
>
>

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Re: Prismatic Plumbing and Graph Open-Source Release

[Valentin Golev]

Graph definitions really remind me of `do` syntax in Haskell, where you can 
bind values and then use them in later steps of the computation.

On Tuesday, January 29, 2013 10:46:54 PM UTC+4, Aria Haghighi wrote:
>
> Hey all,
>
>  Prismatic has open-sourced our Plumbing and Graph library on 
> github. 
> Jason Wolfe gave a 
> talkabout
>  how we use graph for systems composition at Strange loop last year. 
> Please give the library
> a whirl and let us know if you're using it and if you find any issues or 
> feature requests. We use this library very heavily throughout our code and 
> hope others find it useful as well.
>
>  Best, Aria
>

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Re: Clojure - Python Style suggestion

[Softaddicts]

Having worked with a number of languages sensitive to white spaces including
 "magic" columns reminiscent of the paper cards, I honestly do not find any
sex-appeal in a syntax relying on spaces, line breaks and indentation.

It's error prone, errors are harder to detect, and breaks the tool chain.

As far as this alternate proposal, I find the end result ugly at best.
It does not favor a compact coding style which I have chosen years ago
after stopping using the older languages above which did not allow me to be
concise.

Mixing both styles together does not do anything to dissipate this repulsion 
feeling.

Frankly, I do not catch it, I have been working in at least a dozen languages
and half  a dozen assemblers dating back to Fortran and Cobol, older Lisps,...
Working I said, not as a hobby.

I never tried to bend a language to my previous habits. I adapted and made my 
playground within the  limits imposed by the language, that's it.

Are these discussions about parenthesis a sign that humans cannot adapt anymore
and truly try new concepts before judging their merit ? In a decent amount of 
time ?
It took me three months to adapt to Clojure while writing production code and 
I started at ... 47 years old.

It's like if this parenthesis issue is the end of the world.

What will happen the day Earth suffers a major blow (The aftermath series) ?
Insects will pick up were we left ?

http://www.banquedessinee.be/all--21-58.html

No need to understand french, just look at the last picture of the page...

Sorry for the rant but I find these discussions a bad use of our life time.
There is so much to do aside from nit picking on parenthesis

Luc P.



> If someone does write a Lisp with significant whitespace, can we please
> call it "Whitespathe"?
> 
> On 7 February 2013 10:30, Marco Munizaga  wrote:
> 
> > We had this talk with scheme. They called it I expressions. Here is the
> > link http://srfi.schemers.org/srfi-49/srfi-49.html
> >
> > Do it because you can, and so you can decide for yourself what to think
> > about it.
> >
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Re: Clojure/West (Portland, Mar 18-20) - Mission Kontrol, unsessions, lightning talks

[Leonardo Borges]

ah now that makes sense. I'll watch the twittersphere :)
Leonardo Borges
www.leonardoborges.com


On Thu, Feb 7, 2013 at 7:07 PM, Rich Morin  wrote:
> On Feb 6, 2013, at 21:07, Leonardo Borges wrote:
>> Where can we find more about this datomic hack session?
>
> Sorry, it appears that I only posted about this to the Datomic list:
>
>   There will be some unconference sessions Monday evening, so I'll try to
>   schedule something then for Codeq / Datomic.  However, those sessions
>   will be pretty short, so I'm still planning to do a hack session Sunday
>   afternoon from 3-6 (or so :-).
>
>   I probably won't have a specific location until Sunday afternoon, so my
>   plan is to leave some cookie crumbs lying about.
>
>   *  a relevant tweet, eg:
>
>The #datomic hack session at #clojurewest is located at ___.
>Look for the ___.
>
>   *  a note on a message board and/or front desk, eg:
>
>Datomic hack session, 3-6 pm, ___
>
>   This is a good-sized hotel, so I'm pretty sure we'll be able to find a
>   spot to hang out (eg, in the main lobby).  Worst case, a few of us can
>   meet in my hotel room.  After the session, I'll lead a dinner run.
>
> If anyone is arriving earlier and wants to help with logistics, contact me
> (off-list) so we can coordinate...
>
> -r
>
>  --
> http://www.cfcl.com/rdmRich Morin
> http://www.cfcl.com/rdm/resume r...@cfcl.com
> http://www.cfcl.com/rdm/weblog +1 650-873-7841
>
> Software system design, development, and documentation
>
>
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Type hints ignored in proxy-super

[Vladimir Tsichevski]

Hi,

seems type hints are ignored when we use proxy-super:

(set! *warn-on-reflection* true)
(proxy [Object][]
  (equals[o]
(proxy-super equals)))

Reflection warning, null:3 - reference to field equals can't be resolved.

Regards,
Vladimir

PS: I'm on clojure-1.4

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Re: Prismatic Plumbing and Graph Open-Source Release

[László Török]

+1, was also wondering

2013/2/7 Valentin Golev 

> Graph definitions really remind me of `do` syntax in Haskell, where you
> can bind values and then use them in later steps of the computation.
>
>
> On Tuesday, January 29, 2013 10:46:54 PM UTC+4, Aria Haghighi wrote:
>>
>> Hey all,
>>
>>  Prismatic has open-sourced our Plumbing and Graph library on 
>> github.
>> Jason Wolfe gave a 
>> talkabout
>>  how we use graph for systems composition at Strange loop last year.
>> Please give the library
>> a whirl and let us know if you're using it and if you find any issues or
>> feature requests. We use this library very heavily throughout our code and
>> hope others find it useful as well.
>>
>>  Best, Aria
>>
>  --
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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

> You've also got a max-age of 90 for your session cookies, which would 
mean your sessions will 
> time out in 90 seconds. Is that what you want?

Yes, a painful compromise, since the designers didn't want to make the 
"Start Over" link obvious, we went with a short session. This is for a 
little search widget that most users would only interact with for 60 
seconds or so. (Or we could be wrong about this, in which case we will need 
to extend the session length). 

Thanks for the tips I am implementing them now. 

>  (route/resources "/")

What is your hunch about this? The placement? 



On Wednesday, February 6, 2013 4:37:09 PM UTC-5, James Reeves wrote:
>
> Could you try replacing the wrap-resource middleware with the 
> route/resources function? The latter operates in a slightly different way 
> to the Ring middleware, and if the Compojure route works without issue, I 
> might have an idea what the problem is.
>
> i.e. your code should look like:
>
> (defroutes app-routes
>   (ANY "/" request (index request))
>   ;; 
>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>   (route/resources "/")
>   (route/not-found "Page not found"))
>
> You've also got a max-age of 90 for your session cookies, which would mean 
> your sessions will time out in 90 seconds. Is that what you want?
>
> Also:
>
>(GET "/foo" request (foo request))
>
> Is equivalent to:
>
>(GET "/foo" [] foo)
>
> - James
>
>
>  On 6 February 2013 15:10, larry google groups 
> 
> > wrote:
>
>>
>> I created a web app using Ring, Jetty, Enlive, Compojure. 
>>
>> At the end, I bundled everything together by running the command "lein 
>> uberjar". The resulting file was 21 megs. 
>>
>> I scp the file to the server, then I ssh to the server. I start a 
>> "screen" session. Inside the screen session I type :
>>
>> java -jar kiosk-0.1-standalone.jar 30001
>>  
>> The number at the end is the port that I have it running on. 
>>
>> Sometimes, when people look at the app, none of the CSS files load. I 
>> have run into this bug myself. Sometimes, when I look at the app, the 
>> Javascript and CSS paths are broken. If I click "view source" and see the 
>> source, and if I try to follow the links to the CSS or Javascript, then I 
>> get 404 errors. 
>>
>> I have this in my code: 
>>
>>   (wrap-resource "public")
>>
>> The structure of the code is: 
>>
>> /resources
>> /public
>> /css
>> /javascript
>> /templates
>> /src
>> /kiosk
>>
>> The code is still able to find the templates in resources/templates, and 
>> that HTML is given to Enlive, so something appears on screen. It's just the 
>> stuff in "public" that sometimes goes missing. 
>>
>> Can anyone suggest why? My routes are defined like this:
>>
>>
>> (defroutes app-routes
>>   (ANY "/" request (index request))
>>   (GET "/search-results" request (search-results request))
>>   (GET "/schema" [] (schema))
>>   (GET "/account" request (account request))
>>   (GET "/login" request (login request))
>>   (GET "/start-over" request (start-over request))
>>   (GET "/admin" request (admin request))
>>   (GET "/ok" request (ok request))
>>   (POST "/admin" request (record-new-question-if-any request))
>>   (GET "/delete-question/:question-to-delete" request (delete-question 
>> request))
>>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>   (route/not-found "Page not found"))
>>
>> (def app
>>   (-> app-routes
>>   (wrap-resource "public")
>>   (wrap-session {:cookie-name "discovery-session" :cookie-attrs 
>> {:max-age 90 }})
>>   (wrap-cookies)
>>   (wrap-keyword-params)
>>   (wrap-nested-params)
>>   (wrap-params)))
>>
>>
>>  -- 
>> -- 
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clo...@googlegroups.com
>> Note that posts from new members are moderated - please be patient with 
>> your first post.
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>> clojure+u...@googlegroups.com 
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>>  
>>  
>>
>
>

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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

About this:

>(defroutes app-routes
 > (ANY "/" request (index request))
  >;; 
 > (GET "/finish-user-sign-up" request (finish-user-sign-up request))
 > (route/resources "/")
 > (route/not-found "Page not found"))


I removed (wrap-resource) and added (route/resources "/") to the routes, in 
the penultimate position as you suggest, but that seems to have busted 
things completely. None of the images, css or javascript inside of 
resources/public can now be found. 

Any further thoughts on this? This app is suppose to go live today so I 
would like to figure this out. 





On Wednesday, February 6, 2013 4:37:09 PM UTC-5, James Reeves wrote:
>
> Could you try replacing the wrap-resource middleware with the 
> route/resources function? The latter operates in a slightly different way 
> to the Ring middleware, and if the Compojure route works without issue, I 
> might have an idea what the problem is.
>
> i.e. your code should look like:
>
> (defroutes app-routes
>   (ANY "/" request (index request))
>   ;; 
>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>   (route/resources "/")
>   (route/not-found "Page not found"))
>
> You've also got a max-age of 90 for your session cookies, which would mean 
> your sessions will time out in 90 seconds. Is that what you want?
>
> Also:
>
>(GET "/foo" request (foo request))
>
> Is equivalent to:
>
>(GET "/foo" [] foo)
>
> - James
>
>
>  On 6 February 2013 15:10, larry google groups 
> 
> > wrote:
>
>>
>> I created a web app using Ring, Jetty, Enlive, Compojure. 
>>
>> At the end, I bundled everything together by running the command "lein 
>> uberjar". The resulting file was 21 megs. 
>>
>> I scp the file to the server, then I ssh to the server. I start a 
>> "screen" session. Inside the screen session I type :
>>
>> java -jar kiosk-0.1-standalone.jar 30001
>>  
>> The number at the end is the port that I have it running on. 
>>
>> Sometimes, when people look at the app, none of the CSS files load. I 
>> have run into this bug myself. Sometimes, when I look at the app, the 
>> Javascript and CSS paths are broken. If I click "view source" and see the 
>> source, and if I try to follow the links to the CSS or Javascript, then I 
>> get 404 errors. 
>>
>> I have this in my code: 
>>
>>   (wrap-resource "public")
>>
>> The structure of the code is: 
>>
>> /resources
>> /public
>> /css
>> /javascript
>> /templates
>> /src
>> /kiosk
>>
>> The code is still able to find the templates in resources/templates, and 
>> that HTML is given to Enlive, so something appears on screen. It's just the 
>> stuff in "public" that sometimes goes missing. 
>>
>> Can anyone suggest why? My routes are defined like this:
>>
>>
>> (defroutes app-routes
>>   (ANY "/" request (index request))
>>   (GET "/search-results" request (search-results request))
>>   (GET "/schema" [] (schema))
>>   (GET "/account" request (account request))
>>   (GET "/login" request (login request))
>>   (GET "/start-over" request (start-over request))
>>   (GET "/admin" request (admin request))
>>   (GET "/ok" request (ok request))
>>   (POST "/admin" request (record-new-question-if-any request))
>>   (GET "/delete-question/:question-to-delete" request (delete-question 
>> request))
>>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>   (route/not-found "Page not found"))
>>
>> (def app
>>   (-> app-routes
>>   (wrap-resource "public")
>>   (wrap-session {:cookie-name "discovery-session" :cookie-attrs 
>> {:max-age 90 }})
>>   (wrap-cookies)
>>   (wrap-keyword-params)
>>   (wrap-nested-params)
>>   (wrap-params)))
>>
>>
>>  -- 
>> -- 
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clo...@googlegroups.com
>> Note that posts from new members are moderated - please be patient with 
>> your first post.
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>>  
>>  
>>
>
>

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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

Ah, sorry, that does seem to have worked (I think I forgot to recompile). 
What do you think the problem was?


On Thursday, February 7, 2013 10:41:00 AM UTC-5, larry google groups wrote:
>
> About this:
>
> >(defroutes app-routes
>  > (ANY "/" request (index request))
>   >;; 
>  > (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>  > (route/resources "/")
>  > (route/not-found "Page not found"))
>
>
> I removed (wrap-resource) and added (route/resources "/") to the routes, 
> in the penultimate position as you suggest, but that seems to have busted 
> things completely. None of the images, css or javascript inside of 
> resources/public can now be found. 
>
> Any further thoughts on this? This app is suppose to go live today so I 
> would like to figure this out. 
>
>
>
>
>
> On Wednesday, February 6, 2013 4:37:09 PM UTC-5, James Reeves wrote:
>>
>> Could you try replacing the wrap-resource middleware with the 
>> route/resources function? The latter operates in a slightly different way 
>> to the Ring middleware, and if the Compojure route works without issue, I 
>> might have an idea what the problem is.
>>
>> i.e. your code should look like:
>>
>> (defroutes app-routes
>>   (ANY "/" request (index request))
>>   ;; 
>>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>   (route/resources "/")
>>   (route/not-found "Page not found"))
>>
>> You've also got a max-age of 90 for your session cookies, which would 
>> mean your sessions will time out in 90 seconds. Is that what you want?
>>
>> Also:
>>
>>(GET "/foo" request (foo request))
>>
>> Is equivalent to:
>>
>>(GET "/foo" [] foo)
>>
>> - James
>>
>>
>>  On 6 February 2013 15:10, larry google groups wrote:
>>
>>>
>>> I created a web app using Ring, Jetty, Enlive, Compojure. 
>>>
>>> At the end, I bundled everything together by running the command "lein 
>>> uberjar". The resulting file was 21 megs. 
>>>
>>> I scp the file to the server, then I ssh to the server. I start a 
>>> "screen" session. Inside the screen session I type :
>>>
>>> java -jar kiosk-0.1-standalone.jar 30001
>>>  
>>> The number at the end is the port that I have it running on. 
>>>
>>> Sometimes, when people look at the app, none of the CSS files load. I 
>>> have run into this bug myself. Sometimes, when I look at the app, the 
>>> Javascript and CSS paths are broken. If I click "view source" and see the 
>>> source, and if I try to follow the links to the CSS or Javascript, then I 
>>> get 404 errors. 
>>>
>>> I have this in my code: 
>>>
>>>   (wrap-resource "public")
>>>
>>> The structure of the code is: 
>>>
>>> /resources
>>> /public
>>> /css
>>> /javascript
>>> /templates
>>> /src
>>> /kiosk
>>>
>>> The code is still able to find the templates in resources/templates, and 
>>> that HTML is given to Enlive, so something appears on screen. It's just the 
>>> stuff in "public" that sometimes goes missing. 
>>>
>>> Can anyone suggest why? My routes are defined like this:
>>>
>>>
>>> (defroutes app-routes
>>>   (ANY "/" request (index request))
>>>   (GET "/search-results" request (search-results request))
>>>   (GET "/schema" [] (schema))
>>>   (GET "/account" request (account request))
>>>   (GET "/login" request (login request))
>>>   (GET "/start-over" request (start-over request))
>>>   (GET "/admin" request (admin request))
>>>   (GET "/ok" request (ok request))
>>>   (POST "/admin" request (record-new-question-if-any request))
>>>   (GET "/delete-question/:question-to-delete" request (delete-question 
>>> request))
>>>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>>   (route/not-found "Page not found"))
>>>
>>> (def app
>>>   (-> app-routes
>>>   (wrap-resource "public")
>>>   (wrap-session {:cookie-name "discovery-session" :cookie-attrs 
>>> {:max-age 90 }})
>>>   (wrap-cookies)
>>>   (wrap-keyword-params)
>>>   (wrap-nested-params)
>>>   (wrap-params)))
>>>
>>>
>>>  -- 
>>> -- 
>>> You received this message because you are subscribed to the Google
>>> Groups "Clojure" group.
>>> To post to this group, send email to clo...@googlegroups.com
>>> Note that posts from new members are moderated - please be patient with 
>>> your first post.
>>> To unsubscribe from this group, send email to
>>> clojure+u...@googlegroups.com
>>> For more options, visit this group at
>>> http://groups.google.com/group/clojure?hl=en
>>> --- 
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>>> Groups "Clojure" group.
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>>> an email to clojure+u...@googlegroups.com.
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>>>  
>>>  
>>>
>>
>>

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Re: ANN: Tawny-OWL 0.9

[Phillip Lord]

Michael Klishin  writes:

> 2013/2/6 Phillip Lord 
>
>> You mean "what is the name of this library as maven artifact"? Rather
>> than it's dependencies.
>
> Are you sure people will find it there if it's not in the README? The
> thinking "if I can't even get started with it, why do I need to see
> documentation" may be fairly common.


That's a risk, although they will be hyperlinked. The library is
specialist enough, though, that I don't think this will be too much of a
problem. I would expect that most of the people who are interested in
the library will not know what a maven artifact is, or if they do, not
know what to do with it in the context of Clojure, as they will not know
what Clojure is. 

Won't know, till we try!

Phil

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Re: ANN: Tawny-OWL 0.9

[Phillip Lord]

Frank Siebenlist  writes:
> There is one more important difference between EPL and GPL/LGPL that
> we should be aware off:
>
> You cannot copy snippets out of Philip's LGPL'ed code and use them in
> your own EPL'ed code.

This is a true and is, indeed, a risk. Most of the code in tawny is not
that much use, I suspect, outside of the immediate context of the
library; in a sense, it's not really a library, more an end user
application. 

If there is stuff in it which is generic enough that others wish to use,
and that is of general use, I would be happy enough to spin it out as
an independent library. 


> For me, one of the great benefits of all the EPL'ed clojure libraries out
> there is, that I've freely borrowed and stolen many functions and snippets
> from libraries of coders much smarter than me…

Just so; although I generally prefer LGPL or GPL all things being equal,
in this case my reason for choosing this license (which I did carefully)
was for consistency with the libraries that I am using. The OWL API is
doing most of the work under the hood is LGPL. The two reasons I offer
are dual LGPL/Apache, and Apache so that was an option also. In gaining
this consistency, I lost it with Clojure.

Still, it's always better to use a library than copy the code, and this
is still allowable; hopefully, therefore, this should not be a problem. 


> This is just an observation and warning, and I do not want to engage in any
> religious open source licensing argument…

Indeed; they do tend to be drag a bit, as most people already have their
opinions, so it's a bit pointless. Sadly, the legal issues cannot be
avoided, and it's good that you point out the consequences of this.


Phil

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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

Any reason this would work on all browsers except IE? 


On Thursday, February 7, 2013 10:45:02 AM UTC-5, larry google groups wrote:
>
> Ah, sorry, that does seem to have worked (I think I forgot to recompile). 
> What do you think the problem was?
>
>
> On Thursday, February 7, 2013 10:41:00 AM UTC-5, larry google groups wrote:
>>
>> About this:
>>
>> >(defroutes app-routes
>>  > (ANY "/" request (index request))
>>   >;; 
>>  > (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>  > (route/resources "/")
>>  > (route/not-found "Page not found"))
>>
>>
>> I removed (wrap-resource) and added (route/resources "/") to the routes, 
>> in the penultimate position as you suggest, but that seems to have busted 
>> things completely. None of the images, css or javascript inside of 
>> resources/public can now be found. 
>>
>> Any further thoughts on this? This app is suppose to go live today so I 
>> would like to figure this out. 
>>
>>
>>
>>
>>
>> On Wednesday, February 6, 2013 4:37:09 PM UTC-5, James Reeves wrote:
>>>
>>> Could you try replacing the wrap-resource middleware with the 
>>> route/resources function? The latter operates in a slightly different way 
>>> to the Ring middleware, and if the Compojure route works without issue, I 
>>> might have an idea what the problem is.
>>>
>>> i.e. your code should look like:
>>>
>>> (defroutes app-routes
>>>   (ANY "/" request (index request))
>>>   ;; 
>>>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>>   (route/resources "/")
>>>   (route/not-found "Page not found"))
>>>
>>> You've also got a max-age of 90 for your session cookies, which would 
>>> mean your sessions will time out in 90 seconds. Is that what you want?
>>>
>>> Also:
>>>
>>>(GET "/foo" request (foo request))
>>>
>>> Is equivalent to:
>>>
>>>(GET "/foo" [] foo)
>>>
>>> - James
>>>
>>>
>>>  On 6 February 2013 15:10, larry google groups wrote:
>>>

 I created a web app using Ring, Jetty, Enlive, Compojure. 

 At the end, I bundled everything together by running the command "lein 
 uberjar". The resulting file was 21 megs. 

 I scp the file to the server, then I ssh to the server. I start a 
 "screen" session. Inside the screen session I type :

 java -jar kiosk-0.1-standalone.jar 30001
  
 The number at the end is the port that I have it running on. 

 Sometimes, when people look at the app, none of the CSS files load. I 
 have run into this bug myself. Sometimes, when I look at the app, the 
 Javascript and CSS paths are broken. If I click "view source" and see the 
 source, and if I try to follow the links to the CSS or Javascript, then I 
 get 404 errors. 

 I have this in my code: 

   (wrap-resource "public")

 The structure of the code is: 

 /resources
 /public
 /css
 /javascript
 /templates
 /src
 /kiosk

 The code is still able to find the templates in resources/templates, 
 and that HTML is given to Enlive, so something appears on screen. It's 
 just 
 the stuff in "public" that sometimes goes missing. 

 Can anyone suggest why? My routes are defined like this:


 (defroutes app-routes
   (ANY "/" request (index request))
   (GET "/search-results" request (search-results request))
   (GET "/schema" [] (schema))
   (GET "/account" request (account request))
   (GET "/login" request (login request))
   (GET "/start-over" request (start-over request))
   (GET "/admin" request (admin request))
   (GET "/ok" request (ok request))
   (POST "/admin" request (record-new-question-if-any request))
   (GET "/delete-question/:question-to-delete" request (delete-question 
 request))
   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
   (route/not-found "Page not found"))

 (def app
   (-> app-routes
   (wrap-resource "public")
   (wrap-session {:cookie-name "discovery-session" :cookie-attrs 
 {:max-age 90 }})
   (wrap-cookies)
   (wrap-keyword-params)
   (wrap-nested-params)
   (wrap-params)))


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Re: [ANN] Morph v0.1.0 Monads & friends: pure functions, less boilerplate

[Armando Blancas]

Yeap, I've had looked at Jim Duey's projects and had read his articles at 
his website; it's good content.

On Thursday, February 7, 2013 1:48:12 AM UTC-8, Marek Srank wrote:
>
> btw, have you seen https://github.com/jduey/protocol-monads ?
>
> Marek
>
> On Thursday, February 7, 2013 1:06:39 AM UTC+1, Armando Blancas wrote:
>>
>> Morph is a new implementation of monads based on protocols. It's intended 
>> to provide the common patterns of error-handling, short-circuit sequencing, 
>> and modeling of stateful computations in pure functions. I've tried to make 
>> this library idiomatic while keeping it close to its Haskell roots.
>>
>> This is a utility library that, I hope, can make your coding easier. No 
>> particular knowledge is assumed or required. The docs name things but rely 
>> on getting an intuitive feeling of what's going on. Protocols are relevant 
>> only if you want to write your own plumbing, which shouldn't be difficult; 
>> otherwise it's all ready to use.
>>
>> Project:   https://github.com/blancas/morph
>> User Guide: https://github.com/blancas/morph/wiki
>> Codox API:  http://blancas.github.com/morph
>>
>> Please use the project wiki for feedback, bug reports, or feature 
>> requests.
>>
>>

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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

Okay, got all this working. Thank you very much for your tip. Can you say 
what you think the problem was? 


On Thursday, February 7, 2013 11:16:46 AM UTC-5, larry google groups wrote:
>
> Any reason this would work on all browsers except IE? 
>
>
> On Thursday, February 7, 2013 10:45:02 AM UTC-5, larry google groups wrote:
>>
>> Ah, sorry, that does seem to have worked (I think I forgot to recompile). 
>> What do you think the problem was?
>>
>>
>> On Thursday, February 7, 2013 10:41:00 AM UTC-5, larry google groups 
>> wrote:
>>>
>>> About this:
>>>
>>> >(defroutes app-routes
>>>  > (ANY "/" request (index request))
>>>   >;; 
>>>  > (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>>>  > (route/resources "/")
>>>  > (route/not-found "Page not found"))
>>>
>>>
>>> I removed (wrap-resource) and added (route/resources "/") to the routes, 
>>> in the penultimate position as you suggest, but that seems to have busted 
>>> things completely. None of the images, css or javascript inside of 
>>> resources/public can now be found. 
>>>
>>> Any further thoughts on this? This app is suppose to go live today so I 
>>> would like to figure this out. 
>>>
>>>
>>>
>>>
>>>
>>> On Wednesday, February 6, 2013 4:37:09 PM UTC-5, James Reeves wrote:

 Could you try replacing the wrap-resource middleware with the 
 route/resources function? The latter operates in a slightly different way 
 to the Ring middleware, and if the Compojure route works without issue, I 
 might have an idea what the problem is.

 i.e. your code should look like:

 (defroutes app-routes
   (ANY "/" request (index request))
   ;; 
   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
   (route/resources "/")
   (route/not-found "Page not found"))

 You've also got a max-age of 90 for your session cookies, which would 
 mean your sessions will time out in 90 seconds. Is that what you want?

 Also:

(GET "/foo" request (foo request))

 Is equivalent to:

(GET "/foo" [] foo)

 - James


  On 6 February 2013 15:10, larry google groups wrote:

>
> I created a web app using Ring, Jetty, Enlive, Compojure. 
>
> At the end, I bundled everything together by running the command "lein 
> uberjar". The resulting file was 21 megs. 
>
> I scp the file to the server, then I ssh to the server. I start a 
> "screen" session. Inside the screen session I type :
>
> java -jar kiosk-0.1-standalone.jar 30001
>  
> The number at the end is the port that I have it running on. 
>
> Sometimes, when people look at the app, none of the CSS files load. I 
> have run into this bug myself. Sometimes, when I look at the app, the 
> Javascript and CSS paths are broken. If I click "view source" and see the 
> source, and if I try to follow the links to the CSS or Javascript, then I 
> get 404 errors. 
>
> I have this in my code: 
>
>   (wrap-resource "public")
>
> The structure of the code is: 
>
> /resources
> /public
> /css
> /javascript
> /templates
> /src
> /kiosk
>
> The code is still able to find the templates in resources/templates, 
> and that HTML is given to Enlive, so something appears on screen. It's 
> just 
> the stuff in "public" that sometimes goes missing. 
>
> Can anyone suggest why? My routes are defined like this:
>
>
> (defroutes app-routes
>   (ANY "/" request (index request))
>   (GET "/search-results" request (search-results request))
>   (GET "/schema" [] (schema))
>   (GET "/account" request (account request))
>   (GET "/login" request (login request))
>   (GET "/start-over" request (start-over request))
>   (GET "/admin" request (admin request))
>   (GET "/ok" request (ok request))
>   (POST "/admin" request (record-new-question-if-any request))
>   (GET "/delete-question/:question-to-delete" request (delete-question 
> request))
>   (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>   (route/not-found "Page not found"))
>
> (def app
>   (-> app-routes
>   (wrap-resource "public")
>   (wrap-session {:cookie-name "discovery-session" :cookie-attrs 
> {:max-age 90 }})
>   (wrap-cookies)
>   (wrap-keyword-params)
>   (wrap-nested-params)
>   (wrap-params)))
>
>
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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[James Reeves]

On 7 February 2013 16:37, larry google groups wrote:

> Okay, got all this working. Thank you very much for your tip. Can you say
> what you think the problem was?


I noticed that the wrap-resource middleware didn't account for the HTTP
HEAD method, while route/resources does.

According to the HTTP specification, a HEAD request to a URI should return
the same status and headers as a GET request to the same URI. My guess is
that sometimes, instead of sending a GET directly, the browser sends a
HEAD, perhaps to check the Last-Modified date or ETag. The HEAD request
would erroneously return a 404.

I'll mark this as an issue in Ring and get it fixed.

- James

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Re: Prismatic Plumbing and Graph Open-Source Release

[Jason Wolfe]

Hi Edmund,

Thanks for your interest.  There's actually no way to fill in ??? in your 
example, because it's a requirement of Graph that node names must be 
unique, and distinct from top-level input keys.  This ensures that the 
Graph has a unique topological order, and it's always clear where the input 
to a node comes from.  So we can't both treat :a as an input and an output. 
 (Of course, we could always wrap the graph function to merge the inputs 
in, but it still won't quite fit your example)

Here are three ways to do something similar:

;; As a single fnk that returns an explicit map
user> ((eager-compile {:a2 (fnk [[:a1 b]] {:b b :c (inc b)})}) 
   {:a1 {:b 1}})
{:a2 {:b 1, :c 2}}

;; As a single fnk that modifies the input map
user> ((eager-compile {:a2 (fnk [[:a1 b :as a1]] (assoc a1 :c (inc b)))}) 
   {:a1 {:b 1}})
{:a2 {:c 2, :b 1}}

;; As a hierarchical graph
user> ((eager-compile {:a2 {:b (fnk [[:a1 b]] b) 
:c (fnk [[:a1 b]] (inc b))}}) 
   {:a1 {:b 1}})
{:a2 {:b 1, :c 2}}

Note that these all take input key :a1 and output :a2, to avoid a key 
clash, and explicitly copy :b to the output.  If you give me some more 
details about your use case I may be able to provide better advice.

Hope this helps -- let me know if you have any questions.

Cheers,
Jason

On Thursday, February 7, 2013 1:55:13 AM UTC-8, Edmund wrote:
>
> Hey Aria / Jason,
>
>   Thanks for OSing this library, its really useful.  One question: how do 
> you deal with nesting on the output side of graph declaration ?  I 
> understand it for fnk, but but how would I achieve:
>
> {:a {:b 1}} -> {:a {:b 1, :c 2}}
>
> with a single declaration:
>
> (graph/eager-compile
>  {??? (fnk [[:a b]] (inc b))}
>
> where ??? is the binding form I'm after to describe the nesting ?  
>
> I'm currently doing this by breaking up my map and using update-in, but it 
> seems you must have a sneaky trick to do this declaratively ?
>
> I figure [:a :c] would be an possible syntax ?
>
> Thanks again,
>
>  Edmund
> On Tuesday, 29 January 2013 18:46:54 UTC, Aria Haghighi wrote:
>>
>> Hey all,
>>
>>  Prismatic has open-sourced our Plumbing and Graph library on 
>> github. 
>> Jason Wolfe gave a 
>> talkabout
>>  how we use graph for systems composition at Strange loop last year. 
>> Please give the library
>> a whirl and let us know if you're using it and if you find any issues or 
>> feature requests. We use this library very heavily throughout our code and 
>> hope others find it useful as well.
>>
>>  Best, Aria
>>
>

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Re: Prismatic Plumbing and Graph Open-Source Release

[Jason Wolfe]

Interesting.  Our model came from large 'let' statements in Clojure, which 
I think is similar (I'm not too familiar with Haskell).  The advantage over 
the let statement is that now you can manipulate the composition, run only 
part of it, wrap the value functions to monitor them, and so on.  I think 
the latter use-case is actually very closely related to the Haskell 
example, since it lets us do the same kinds of things you would do with a 
monad (see graph_examples_test for an example with 'resources') .  But here 
the wrapping is a higher-order function, rather than a monad that has to be 
specified up front.

On Thursday, February 7, 2013 2:38:50 AM UTC-8, Valentin Golev wrote:
>
> Graph definitions really remind me of `do` syntax in Haskell, where you 
> can bind values and then use them in later steps of the computation.
>
> On Tuesday, January 29, 2013 10:46:54 PM UTC+4, Aria Haghighi wrote:
>>
>> Hey all,
>>
>>  Prismatic has open-sourced our Plumbing and Graph library on 
>> github. 
>> Jason Wolfe gave a 
>> talkabout
>>  how we use graph for systems composition at Strange loop last year. 
>> Please give the library
>> a whirl and let us know if you're using it and if you find any issues or 
>> feature requests. We use this library very heavily throughout our code and 
>> hope others find it useful as well.
>>
>>  Best, Aria
>>
>

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Re: Clojure/West (Portland, Mar 18-20) - Mission Kontrol, unsessions, lightning talks

[Austin Haas]

The arcade is called Ground Kontrol (not Mission Kontrol).

http://groundkontrol.com/

Last summer, I attended another conference that rented Ground Kontrol
for a few hours of free play. Most games are multi-player, and you
know everyone is there for the conference, so it can be a really fun
way to meet people. (And they also have a full bar.)

-austin

-- 
Austin Haas
Pet Tomato, Inc.
http://pettomato.com

On Wed Feb 06 20:27 , Alex Miller wrote:
> Clojure/West has a great schedule lined up. If you haven't yet, check out
> the schedule at http://clojurewest.org/schedule. You can register at
> http://regonline.com/clojurewest2013.
> 
> If you've seen the odd couple (Dan Friedman and Will Byrd) talking about
> miniKanren and logic programming, you know they have a lot of interesting
> stuff to show. We've got a whole miniKanren Confo lined up colocated with
> Clojure/West, with not just Dan and Will, but David Nolen, and some other
> great talks (http://clojurewest.org/sessions#confo). Register as an
> optional item when you register for Clojure/West.
> 
> If you're coming in the night before the conference, we've got Mission
> Kontrol, the arcade wonderland reserved with FREE PLAY on all games from
> 7-9 pm. It's just a couple blocks from the hotel.
> 
> Unsessions (https://github.com/strangeloop/clojurewest2013/wiki/Unsessions)
> and lightning talks (http://bit.ly/WBqELu) are now open for submissions.
> Unsessions will be scheduled based on interest and lightning talks will be
> opened up to a poll of attendees prior to the conference.
> 
> Gonna be great!
> Alex
> 
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[ClojureScript] Please test CLJS-418, fixing browser REPL

[David Nolen]

http://dev.clojure.org/jira/browse/CLJS-418

Some of you may have encountered bizarre problems when trying to use
browser REPL with the latest releases of ClojureScript. This ticket
contains a patch that should resolve the issue but we need people to test.

Thanks,
David

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Re: [ANN] Kern 0.5.0 -- A text-parsing library

[Armando Blancas]

Ragnar, thanks for your kind words; I'm glad you're finding kern fun and 
useful.

The lexer module has parsers that take care of whitespace, and conveniences 
like parens, braces, comma-sep (and others) that shorten things. You might 
start with the namespace blancas.kern.lexer.basic and use similar functions 
as core (but without the star) like sym and token that handle whitespace 
(these functions parse and then consume any whitespace until the next 
char). 

Using some of the functions from that namespace, lines 93-102 may come down 
to:
(def ruby-attributes (braces (comma-sep ruby-attr-pair)))

Similarly, lines 64-69 could be:
(def html-attributes (parens (many html-attr-pair)))

just surround the values with (lexeme) to ignore whitespace: the defs for 
html-name, html-value, ruby-name, etc:
(def html-name (lexeme (<|> ...)))

That would reduce the checks for spaces in your (bind) sequences. Just 
experiment with these ideas and see if it gets simpler. Feel free to ask me 
any more questions.

On Thursday, February 7, 2013 2:35:02 AM UTC-8, Ragnar Dahlén wrote:
>
> Hi Armando,
>
> Thank you for your great work with this library! I don't have much 
> previous experience with parser combinators, but with your implementation, 
> and the wonderful documentation, I've had a lot of fun playing and learning.
>
> I've been hacking on a small project for implementing a subset of HAML for 
> Clojure, with the goal of using HAML instead of HTML for enlive templates. 
> It is very early days, but if you're interested, I'd be very happy for any 
> feedback on the parser, which uses kern. I've probably done a lot of stupid 
> stuff.
>
> Project:
> https://github.com/ragnard/hamelito
>
> Parser:
> https://github.com/ragnard/hamelito/blob/master/src/hamelito/parsing.clj
>
> Best regards,
>
> Ragnar
>
>
> On Monday, 21 January 2013 18:27:07 UTC, Armando Blancas wrote:
>>
>> Kern is a text-parsing library based on Parsec, the Haskell monadic 
>> combinators library. It is useful for parsing all kinds of text: data, 
>> program input, configuration files, DSLs, or a full-blown programming 
>> language.
>>
>> My main goal is, like the Self folks, the power of simplicity. In the 
>> ideal case the grammar is the implementation, but I'm OK with something 
>> close. Next comes performance, which appears to be fine with hot code but 
>> not great otherwise. Let me know and will see what I can do.
>>
>> https://github.com/blancas/kern
>>
>> The wiki has a user's guide, tutorials, and links to several samples; 
>> will be adding some more topics there. There's also a Codox API zip file 
>> available for download. Feedback, suggestions, requests, bug reports are 
>> all very welcome; please use the project wiki.
>>
>>

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Re: Prismatic Plumbing and Graph Open-Source Release

[Jason Wolfe]

We've just posted a blog post with more high-level context on what we're 
trying to accomplish with Graph (plus more examples!)

http://blog.getprismatic.com/blog/2013/2/1/graph-abstractions-for-structured-computation

We're also answering questions and reading comments in the Hacker News 
thread, if that's your thing:

http://news.ycombinator.com/item?id=5183236

Cheers, Jason


On Tuesday, January 29, 2013 10:46:54 AM UTC-8, Aria Haghighi wrote:
>
> Hey all,
>
>  Prismatic has open-sourced our Plumbing and Graph library on 
> github. 
> Jason Wolfe gave a 
> talkabout
>  how we use graph for systems composition at Strange loop last year. 
> Please give the library
> a whirl and let us know if you're using it and if you find any issues or 
> feature requests. We use this library very heavily throughout our code and 
> hope others find it useful as well.
>
>  Best, Aria
>

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Re: Prismatic Plumbing and Graph Open-Source Release

[AtKaaZ]

Hello.
https://github.com/Prismatic/plumbing/blob/master/test/plumbing/graph_examples_test.clj#L148
Why do they return in a map instead of maybe a set ? do we ever get {:key
false} ?
Thanks.


On Thu, Feb 7, 2013 at 7:22 PM, Jason Wolfe  wrote:

> We've just posted a blog post with more high-level context on what we're
> trying to accomplish with Graph (plus more examples!)
>
>
> http://blog.getprismatic.com/blog/2013/2/1/graph-abstractions-for-structured-computation
>
> We're also answering questions and reading comments in the Hacker News
> thread, if that's your thing:
>
> http://news.ycombinator.com/item?id=5183236
>
> Cheers, Jason
>
>
> On Tuesday, January 29, 2013 10:46:54 AM UTC-8, Aria Haghighi wrote:
>>
>> Hey all,
>>
>>  Prismatic has open-sourced our Plumbing and Graph library on 
>> github.
>> Jason Wolfe gave a 
>> talkabout
>>  how we use graph for systems composition at Strange loop last year.
>> Please give the library
>> a whirl and let us know if you're using it and if you find any issues or
>> feature requests. We use this library very heavily throughout our code and
>> hope others find it useful as well.
>>
>>  Best, Aria
>>
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Please correct me if I'm wrong or incomplete,
even if you think I'll subconsciously hate it.

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Re: Prismatic Plumbing and Graph Open-Source Release

[Jason Wolfe]

On Thu, Feb 7, 2013 at 10:54 AM, AtKaaZ  wrote:
> Hello.
> https://github.com/Prismatic/plumbing/blob/master/test/plumbing/graph_examples_test.clj#L148
> Why do they return in a map instead of maybe a set ? do we ever get {:key
> false} ?
> Thanks.

The leaf value for output schemata is always 'true'.  It's a bit odd,
but to support specifications of functions/graphs that return nested
maps, the outer layers need to be maps.  It's true that the innermost
layers could be represented as sets, but we chose to keep things
uniform instead.

>
>
> On Thu, Feb 7, 2013 at 7:22 PM, Jason Wolfe  wrote:
>>
>> We've just posted a blog post with more high-level context on what we're
>> trying to accomplish with Graph (plus more examples!)
>>
>>
>> http://blog.getprismatic.com/blog/2013/2/1/graph-abstractions-for-structured-computation
>>
>> We're also answering questions and reading comments in the Hacker News
>> thread, if that's your thing:
>>
>> http://news.ycombinator.com/item?id=5183236
>>
>> Cheers, Jason
>>
>>
>> On Tuesday, January 29, 2013 10:46:54 AM UTC-8, Aria Haghighi wrote:
>>>
>>> Hey all,
>>>
>>>  Prismatic has open-sourced our Plumbing and Graph library on github.
>>> Jason Wolfe gave a talk about how we use graph for systems composition at
>>> Strange loop last year. Please give the library
>>> a whirl and let us know if you're using it and if you find any issues or
>>> feature requests. We use this library very heavily throughout our code and
>>> hope others find it useful as well.
>>>
>>>  Best, Aria
>>
>> --
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>
>
>
>
> --
> Please correct me if I'm wrong or incomplete,
> even if you think I'll subconsciously hate it.
>
> --
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Re: CSS sometimes disappears in uberjar web app using wrap-resource

[larry google groups]

Fantastic insight. Thanks much, it is working great now on all browsers 
(the bug had mostly appeared on IE). 


On Thursday, February 7, 2013 11:48:50 AM UTC-5, James Reeves wrote:
>
> On 7 February 2013 16:37, larry google groups 
> 
> > wrote:
>
>> Okay, got all this working. Thank you very much for your tip. Can you say 
>> what you think the problem was? 
>
>
> I noticed that the wrap-resource middleware didn't account for the HTTP 
> HEAD method, while route/resources does.
>
> According to the HTTP specification, a HEAD request to a URI should return 
> the same status and headers as a GET request to the same URI. My guess is 
> that sometimes, instead of sending a GET directly, the browser sends a 
> HEAD, perhaps to check the Last-Modified date or ETag. The HEAD request 
> would erroneously return a 404.
>
> I'll mark this as an issue in Ring and get it fixed.
>
> - James
>

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Simple Network Messaging

[JvJ]

I'm looking to do some simple messaging (json strings) between programs 
running on the same machine.  One will be in C# and one will be in Clojure. 
 Is there a library/set of libraries that could simplify this 
communication?  I haven't done much networking in the past, and I'd like to 
keep this as painless as possible.

Thanks.

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Re: Callbacks as Sequences

[JvJ]

Thanks, but I'm looking for something that would let me sent strings 
between programs on localhost.

On Wednesday, 6 February 2013 22:17:02 UTC-5, Feng Shen wrote:
>
> I did something for a http lib:
>
> ;; get them concurrently(let [response1 (http/get "http://http-kit.org/";)
>   response2 (http/get "http://clojure.org/";)]
>   ;; handle responses one-by-one, waiting for response as necessary
>   ;; other keys :headers :status :error :opts
>   (println "response1: " (:body @response1))
>   (println "response2: " (:body @response2)))
>
>
>
> On Thursday, February 7, 2013 2:45:36 AM UTC+8, da...@dsargeant.com wrote:
>>
>> I'm not to clojure/clojurescript and was wondering if anyone has taken a 
>> crack at writing a macro that transforms callbacks into a sequence.  There 
>> is an awesome implementationion in LispyScript show here: 
>> https://gist.github.com/santoshrajan/3715526.  Thanks for help.
>>
>> David
>>
>

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Re: Clojure - Python Style suggestion

[Jason Lewis]

`quote` is a feature, not a bug. Its not just for distinguishing between
lists and function calls, its for deferring evaluation. Its also been part
of Lisp since the beginning... IIRC, its in McCarthy's paper that defined
the first lisp.
 On Feb 4, 2013 7:58 PM, "Dave Sann"  wrote:

> The syntax does complect in one case.
> When you really do want a list as opposed to a function call. hence quote
> and (list ...)
>
> On Tuesday, 5 February 2013 07:06:37 UTC+11, tbc++ wrote:
>>
>> Parens actually don't complect, they have a very very clear meaning. They
>> organize functions and arguments. Let's take one line from your example:
>>
>> filter smaller xs
>>
>> Sois that the python equivalent to which of these?
>>
>> filter(smaller(xs))
>> filter(smaller, xs)
>> filter(smaller(), xs())
>> filter(smaller(xs()))
>>
>> I would also assert that Python complects formatting and semantic meaning
>> of the code. I'm quite proficient at Python and even I hate that fact.
>>
>> Timothy
>>
>>
>>
>> On Mon, Feb 4, 2013 at 1:01 PM, Sergey Didenko wrote:
>>
>>> Hi,
>>>
>>> For us as Clojure community it is easy to see how Clojure benefits
>>> from being a Lisp. Homoiconity, extreme conciseness, esoteric look and
>>> feel, etc.
>>>
>>> However it is hard to see from the inside how Clojure as ecosystem
>>> (probably) suffer from being a Lisp. Please don't throw rotten eggs at
>>> me, I mean only the part of Lisp that is ... parentheses.
>>>
>>> I remember a number of people that mention parentheses as obstacles to
>>> the wider Clojure adoption, in the Clojure space - in the Clojure
>>> related discussions, even on this mailing list IIRC.
>>>
>>> But the number of people thinking this way outside the Clojure groups
>>> is even bigger! We probably don't notice it because got immune to this
>>> famous argument "it has too many parentheses" early when diving into
>>> Clojure.
>>>
>>> I suggest there are a big number of people that could gain interest in
>>> clojure if we provide them with parentheses-lite Clojure syntax. For
>>> example we can steal Python way of intending blocks.
>>>
>>> For example the following quicksort implementation
>>>
>>> (defn qsort [[pivot & xs]]
>>>   (when pivot
>>> (let [smaller #(< % pivot)]
>>>   (lazy-cat (qsort (filter smaller xs))
>>> [pivot]
>>> (qsort (remove smaller xs))
>>>
>>> could be written as
>>>
>>> (set! python-style-op-op true)
>>>
>>> defn qsort [[pivot & xs]]
>>>   when pivot
>>> let [smaller #(< % pivot)]
>>>   lazy-cat
>>> qsort
>>>   filter smaller xs
>>> [pivot]
>>> qsort
>>>   remove smaller xs
>>>
>>> What do you think?
>>>
>>> Isn't is less complex?
>>>
>>>
>>> P.S. Ok, I must confess, the mention of the C-Word in the last
>>> sentence was just a desperate way to get Rich's attention.
>>>
>>> P.P.S. Actually I would also love to see Clojure community making
>>> video clip "Clojure - Python Style" as a remix for "G... Style", but
>>> this idea is probably way ahead of its time.
>>>
>>>
>>> Regards, Sergey.
>>>
>>> --
>>> --
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>>> .
>>>
>>>
>>>
>>
>>
>> --
>> “One of the main causes of the fall of the Roman Empire was that–lacking
>> zero–they had no way to indicate successful termination of their C
>> programs.”
>> (Robert Firth)
>>
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Re: Simple Network Messaging

[Herwig Hochleitner]

I'd use sockets (or even pipes, if you really don't need any flexibility in
the setup),
it doesn't get much simpler than that.
They just work.

cheers


2013/2/7 JvJ 

> I'm looking to do some simple messaging (json strings) between programs
> running on the same machine.  One will be in C# and one will be in Clojure.
>  Is there a library/set of libraries that could simplify this
> communication?  I haven't done much networking in the past, and I'd like to
> keep this as painless as possible.
>
> Thanks.
>
> --
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Re: Clojure - Python Style suggestion

[Herwig Hochleitner]

On Feb 4, 2013 7:58 PM, "Dave Sann"  wrote:

> The syntax does complect in one case.
> When you really do want a list as opposed to a function call. hence quote
> and (list ...)
>

The evaluation rules are clojure's implementation of reduction in lambda
calculus.
Every clojure form has an associated evaluation rule.
So syntax and semantic are already complected from the start. Otherwise we
wouldn't call it a language.

On Tuesday, 5 February 2013 07:06:37 UTC+11, tbc++ wrote:
>
> I would also assert that Python complects formatting and semantic meaning
> of the code.
>

It does, however the mind of the typical human reader does too. I think
that's the point of python.
In this sense, I think, making formatting significant is actually a good
idea.

The reason we can still leave this thread now is:
- Python - style significant white space only works for code blocks
- It works great for python, because python is _an imperative language_
- In functional style, only let is consistently formatted as a block,
  hence blocks just don't work as the foundation of formatting

> filter(smaller, xs)
> filter(smaller(), xs())

This, btw, is the reason I have a bit of language envy towards haskell.
(with lazy evaluation, the difference between f and (f) vanishes)

cheers

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Re: Sending Clojure Objects over TCP

[Matthew]

Aleph 

On Thursday, February 7, 2013 12:16:03 PM UTC+11, JvJ wrote:
>
> Does anyone know if there's a simplified networking library that allows 
> this?

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Re: Sending Clojure Objects over TCP

[Feng Shen]

slacker - Transparent, non-invasive RPC by clojure and for clojure.


https://*github*.com/sunng87/*slacker*
*
*

   1. 
   2. 
   
On Thursday, February 7, 2013 9:16:03 AM UTC+8, JvJ wrote:
>
> Does anyone know if there's a simplified networking library that allows 
> this?

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Re: Simple Network Messaging

[Feng Shen]

For json, Clojure has a convenient lib:  
https://github.com/clojure/data.json 

for networking, how about using HTTP as the transport?  Clojure has 
many libraries for HTTP server & client,  c# has many libraries too.



On Friday, February 8, 2013 5:44:06 AM UTC+8, JvJ wrote:
>
> I'm looking to do some simple messaging (json strings) between programs 
> running on the same machine.  One will be in C# and one will be in Clojure. 
>  Is there a library/set of libraries that could simplify this 
> communication?  I haven't done much networking in the past, and I'd like to 
> keep this as painless as possible.
>
> Thanks.
>

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Re: Clojure - Python Style suggestion

[Dave Sann]

yes, I did not mean to imply otherwise.

On Friday, 8 February 2013 09:04:43 UTC+11, Jason Lewis wrote:
>
> `quote` is a feature, not a bug. Its not just for distinguishing between 
> lists and function calls, its for deferring evaluation. Its also been part 
> of Lisp since the beginning... IIRC, its in McCarthy's paper that defined 
> the first lisp.
>  On Feb 4, 2013 7:58 PM, "Dave Sann" > 
> wrote:
>
>> The syntax does complect in one case. 
>> When you really do want a list as opposed to a function call. hence quote 
>> and (list ...)
>>
>> On Tuesday, 5 February 2013 07:06:37 UTC+11, tbc++ wrote:
>>>
>>> Parens actually don't complect, they have a very very clear meaning. 
>>> They organize functions and arguments. Let's take one line from your 
>>> example:
>>>
>>> filter smaller xs
>>>
>>> Sois that the python equivalent to which of these?
>>>
>>> filter(smaller(xs))
>>> filter(smaller, xs)
>>> filter(smaller(), xs())
>>> filter(smaller(xs()))
>>>
>>> I would also assert that Python complects formatting and semantic 
>>> meaning of the code. I'm quite proficient at Python and even I hate that 
>>> fact. 
>>>
>>> Timothy
>>>
>>>
>>>
>>> On Mon, Feb 4, 2013 at 1:01 PM, Sergey Didenko wrote:
>>>
 Hi,

 For us as Clojure community it is easy to see how Clojure benefits
 from being a Lisp. Homoiconity, extreme conciseness, esoteric look and
 feel, etc.

 However it is hard to see from the inside how Clojure as ecosystem
 (probably) suffer from being a Lisp. Please don't throw rotten eggs at
 me, I mean only the part of Lisp that is ... parentheses.

 I remember a number of people that mention parentheses as obstacles to
 the wider Clojure adoption, in the Clojure space - in the Clojure
 related discussions, even on this mailing list IIRC.

 But the number of people thinking this way outside the Clojure groups
 is even bigger! We probably don't notice it because got immune to this
 famous argument "it has too many parentheses" early when diving into
 Clojure.

 I suggest there are a big number of people that could gain interest in
 clojure if we provide them with parentheses-lite Clojure syntax. For
 example we can steal Python way of intending blocks.

 For example the following quicksort implementation

 (defn qsort [[pivot & xs]]
   (when pivot
 (let [smaller #(< % pivot)]
   (lazy-cat (qsort (filter smaller xs))
 [pivot]
 (qsort (remove smaller xs))

 could be written as

 (set! python-style-op-op true)

 defn qsort [[pivot & xs]]
   when pivot
 let [smaller #(< % pivot)]
   lazy-cat
 qsort
   filter smaller xs
 [pivot]
 qsort
   remove smaller xs

 What do you think?

 Isn't is less complex?


 P.S. Ok, I must confess, the mention of the C-Word in the last
 sentence was just a desperate way to get Rich's attention.

 P.P.S. Actually I would also love to see Clojure community making
 video clip "Clojure - Python Style" as a remix for "G... Style", but
 this idea is probably way ahead of its time.


 Regards, Sergey.

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>>>
>>>
>>> -- 
>>> “One of the main causes of the fall of the Roman Empire was that–lacking 
>>> zero–they had no way to indicate successful termination of their C 
>>> programs.”
>>> (Robert Firth) 
>>>
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Re: Clojure/West (Portland, Mar 18-20) - Mission Kontrol, unsessions, lightning talks

[Alex Miller]

CORRECT! Apparently I was hitting the Nyquil a little too hard the other 
night.

If someone wants to sponsor the night at Ground Kontrol, please let me 
know!  It's available.

Alex


On Thursday, February 7, 2013 10:58:07 AM UTC-6, Austin Haas wrote:
>
>
> The arcade is called Ground Kontrol (not Mission Kontrol). 
>
> http://groundkontrol.com/ 
>
> Last summer, I attended another conference that rented Ground Kontrol 
> for a few hours of free play. Most games are multi-player, and you 
> know everyone is there for the conference, so it can be a really fun 
> way to meet people. (And they also have a full bar.) 
>
> -austin 
>
> -- 
> Austin Haas 
> Pet Tomato, Inc. 
> http://pettomato.com 
>
> On Wed Feb 06 20:27 , Alex Miller wrote: 
> > Clojure/West has a great schedule lined up. If you haven't yet, check 
> out 
> > the schedule at http://clojurewest.org/schedule. You can register at 
> > http://regonline.com/clojurewest2013. 
> > 
> > If you've seen the odd couple (Dan Friedman and Will Byrd) talking about 
> > miniKanren and logic programming, you know they have a lot of 
> interesting 
> > stuff to show. We've got a whole miniKanren Confo lined up colocated 
> with 
> > Clojure/West, with not just Dan and Will, but David Nolen, and some 
> other 
> > great talks (http://clojurewest.org/sessions#confo). Register as an 
> > optional item when you register for Clojure/West. 
> > 
> > If you're coming in the night before the conference, we've got Mission 
> > Kontrol, the arcade wonderland reserved with FREE PLAY on all games from 
> > 7-9 pm. It's just a couple blocks from the hotel. 
> > 
> > Unsessions (
> https://github.com/strangeloop/clojurewest2013/wiki/Unsessions) 
> > and lightning talks (http://bit.ly/WBqELu) are now open for 
> submissions. 
> > Unsessions will be scheduled based on interest and lightning talks will 
> be 
> > opened up to a poll of attendees prior to the conference. 
> > 
> > Gonna be great! 
> > Alex 
> > 
> > -- 
> > -- 
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> > 
>

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Can a protocol method have the same name as a clojure.core function?

[Don Jackson]

I'd like to name a protocol method to be the same name as a clojure.core 
function, for example, get.

Is this possible, and if so, how?

user=> (ns ptest.protocol
(:refer-clojure :exclude [get]))
nil

ptest.protocol=> (defprotocol TestProtocol
(get
   [_ key]
"Returns the contents of field :key") )

TestProtocol

ptest.protocol=> (ns ptest.core
  (:require [ptest.protocol :as testp])
  (:refer-clojure :exclude [get]))

ptest.core=> (defrecord TF
 [a
 b
 ]
   testp/TestProtocol
   (get
[this key]
   "Doesn't work!"))

CompilerException java.lang.ClassFormatError: Duplicate method name&signature 
in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1) 


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Re: Can a protocol method have the same name as a clojure.core function?

[Ben Wolfson]

You just can't use defrecord, because defrecord macroexpands into a
deftype that implements a *different* protocol with a function *also*
named "get".

On Thu, Feb 7, 2013 at 9:24 PM, Don Jackson
 wrote:
>
> I'd like to name a protocol method to be the same name as a clojure.core
> function, for example, get.
>
> Is this possible, and if so, how?
>
> user=> (ns ptest.protocol
> (:refer-clojure :exclude [get]))
> nil
>
> ptest.protocol=> (defprotocol TestProtocol
> (get
>[_ key]
> "Returns the contents of field :key") )
>
> TestProtocol
>
> ptest.protocol=> (ns ptest.core
>   (:require [ptest.protocol :as testp])
>   (:refer-clojure :exclude [get]))
>
> ptest.core=> (defrecord TF
>  [a
>  b
>  ]
>testp/TestProtocol
>(get
> [this key]
>"Doesn't work!"))
>
> CompilerException java.lang.ClassFormatError: Duplicate method
> name&signature in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1)
>
>
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-- 
Ben Wolfson
"Human kind has used its intelligence to vary the flavour of drinks,
which may be sweet, aromatic, fermented or spirit-based. ... Family
and social life also offer numerous other occasions to consume drinks
for pleasure." [Larousse, "Drink" entry]

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Re: Can a protocol method have the same name as a clojure.core function?

[Don Jackson]

That makes perfect sense, and I should have figured that out since defrecord is 
implementing
a bunch of useful protocols underneath….

Thanks for the quick response!

On Feb 7, 2013, at 9:38 PM, Ben Wolfson  wrote:

> You just can't use defrecord, because defrecord macroexpands into a
> deftype that implements a *different* protocol with a function *also*
> named "get".
> 
> On Thu, Feb 7, 2013 at 9:24 PM, Don Jackson
>  wrote:
>> 
>> I'd like to name a protocol method to be the same name as a clojure.core
>> function, for example, get.
>> 
>> Is this possible, and if so, how?
>> 
>> user=> (ns ptest.protocol
>>(:refer-clojure :exclude [get]))
>> nil
>> 
>> ptest.protocol=> (defprotocol TestProtocol
>>(get
>>   [_ key]
>>"Returns the contents of field :key") )
>> 
>> TestProtocol
>> 
>> ptest.protocol=> (ns ptest.core
>>  (:require [ptest.protocol :as testp])
>>  (:refer-clojure :exclude [get]))
>> 
>> ptest.core=> (defrecord TF
>> [a
>> b
>> ]
>>   testp/TestProtocol
>>   (get
>>[this key]
>>   "Doesn't work!"))
>> 
>> CompilerException java.lang.ClassFormatError: Duplicate method
>> name&signature in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1)
>> 
>> 
>> --
>> --
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>> 
> 
> 
> 
> -- 
> Ben Wolfson
> "Human kind has used its intelligence to vary the flavour of drinks,
> which may be sweet, aromatic, fermented or spirit-based. ... Family
> and social life also offer numerous other occasions to consume drinks
> for pleasure." [Larousse, "Drink" entry]
> 
> -- 
> -- 
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> 

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Re: Can a protocol method have the same name as a clojure.core function?

[Meikel Brandmeyer (kotarak)]

Hi,

you can still use a defrecord. Just don't implement the protocol inline.

Clojure
user=> (ns foo.bar (:refer-clojure :exclude [get]))
nil
foo.bar=> (defprotocol FooBar (get [this]))
FooBar
foo.bar=> (ns foo.baz)
nil
foo.baz=> (alias 'fb 'foo.bar) ; this is due to working only in the repl. 
Normally you would use :require in the ns clause.
nil
foo.baz=> (defrecord Baz [a b c])
foo.baz.Baz
foo.baz=> (extend-type Baz
fb/FooBar
(get [{:keys [a b c]}] (str a b c)))
nil
foo.baz=> (fb/get (->Baz "fo" "ob" "ar"))
"foobar"

Implementing a protocol inline is an optimisation, not a requirement.

Meikel

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Re: Callbacks as Sequences

[Erik Bakstad]

Not sure it applies, but I found this very interesting: 
http://oobaloo.co.uk/clojure-from-callbacks-to-sequences

Erik


kl. 19:45:36 UTC+1 onsdag 6. februar 2013 skrev da...@dsargeant.com 
følgende:
>
> I'm not to clojure/clojurescript and was wondering if anyone has taken a 
> crack at writing a macro that transforms callbacks into a sequence.  There 
> is an awesome implementationion in LispyScript show here: 
> https://gist.github.com/santoshrajan/3715526.  Thanks for help.
>
> David
>

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