Mathias,
I wrote a short article about building more complex reduce functions
here[1]. I wrote it mostly to reinforce my own knowledge. The bottom
section will be most relevant to you.
Hope it helps,
Jarrod
[1]: http://jarrodswart.com/articles/clojure-tutorial-reduce-functions
On Friday, De
Awesome thank you!
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James,
It appears Sean and yourself have identified the issue. The tmux scripts
that launch my dev environment don't pull in the necessary environment.
I have seen your environ library and I was to thank you for all your
contributions. Sean too!
While I have you James do you have a good ex
Sean,
Thanks for the input. There is a good chance you are right. The process
is launched from tmuxinator a tool that opens multiple processes and joins
them all to a tmux session.
I suppose I'll have to investigate that but it seems odd that if I type
"echo $MY_VAR" I get the expected value
Yep I ran
export MY_VAR=foo
and all subsequent "calls" to get or print the env var on the CLI work fine.
I set the var and restarted all repl processes.
I'll try setting it in .bashrc as well.
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To pos
If I call:
(System/getenv "MY_VAR") ;=> nil
>From bash
set | grep MY_VAR ;=> foo
echo $MY_VAR' ;=> foo
I can do this from bash, as well as my tmux session. I use tmuxinator to
launch a repl and vim, thus my repl process is running inside TMUX. That
said, I can see the env var in other tmu
As Richard said most places that run Java, will run your Clojure. Google
App Engine and Engine Yard appear to take a WAR file.
lein ring uberwar (in your project dir)
While heroku pushes your code to the "server" and then does its magic.
git push
If you run on your own servers most people do
Thank you.
The compojure-app template does something similar, and I was using that
from LightTable, evaling a (start-server) var.
This was good info and reminded me what I was doing and how to apply it to
the new environment.
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I've noticed that when using Ring + Compojure w/ LightTable the following
process will get me access to any newly added routes.
1. Add a route
2. Eval the route NS
3. Eval the handler NS
4. Check route in browser
5. Success
Recently I've begun using Vim + Fireplace.
I cd to my project dir and s
I've been reading about Heroku's process model and their approach to web
app architecture.
I'm curious how you could recreate something like this:
https://devcenter.heroku.com/articles/getting-started-with-clojure#one-off-scripts
Using an uberjar in environments other than heroku.
Would it mak
Just to add to this because I ran across this reading some code a few days
ago:
https://github.com/overtone/at-at/blob/master/src/overtone/at_at.clj#L43-51
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A tip if you are completely stuck on 4clojure:
Often the 4clojure problem will say you can't use a particular function.
The first thing I would do is go look at the source code for that
function, then I would try to find other functions with similar
functionality.
Much like learning to paint
Oh wow, thanks for all the responses!
I'm certainly not making it a PHP vs. Clojure all or nothing debate.
Anything other than PHP would be helpful, not simply because I want to bad
mouth PHP. After 2 years working with it I know firsthand its shortcomings
for building actual applications.
Wh
Alan,
Thanks for your input! ClojureScript is something I have wanted to try
more but it seems even more cutting edge than Clojure. It might be too
much effort to try and tackle that now.
I do agree though that Clojure+Ring is a great back-end setup for
connecting to with JavaScript.
Best,
David,
Awesome thanks for sharing!
I hope it works out for you!
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Sean,
Thanks for the reply and insight. I completely agree on your points.
We will be in a 12 week accelerator program so it is quite possible that
this code & business could fail. Our work is likely going to be more
back-end API centric as a point of integration for other businesses rather
Sean,
Oops I didn't realize you were asking these questions:
- What are you building?
- An application for businesses to help leverage the power of crowds
in non-traditional "crowdsource" environments.
- The main use-case for many will be that of integration with-in
No problem, happy to help. Here is one way you might write the above with
fs. I didn't check this I just typed it out so there may be a few tiny
bugs.
(defn jar? [filename]
(if (= (fs/extension filename) "jar")
true
false))
(defn list-paths [path-str]
(println "Files in " path-str
Hey Brandon,
I had a really simple blog post about reading a directory of files that I
never published, I updated it and hopefully it can help:
http://jarrodswart.com/clojure-like-im-five-working-with-files/
Best,
Jarrod
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Christopher,
Absolutely I agree. I enjoyed that book very much.
I think I misstated my question a bit in that I don't need to be convinced
of the value, but rather how best to relay Clojure's benefits to
non-technical business types.
Thanks for your input.
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Gary,
Thanks for your observations. I agree it doesn't necessarily have to be
all or nothing. I'm hoping to get as much as possible insight before I
present to the founders.
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I'm about to be an early employee at a small startup.
I will be the first technical hire and am a competent but not
extraordinarily experienced developer. The founders know this and hired me
based on soft as well as technical skills.
I don't want to be the first technical employee and make
No edit button so I have to post again, that first example should end with
";; (make-profile-url "John Smith") => "/John-Smith"
And to reiterate you decide what your url will look like in your template:
http://myapp.com/JohnSmith";>View John Smith's Profile
or
http://myapp.com/John-Smith";>View
Right, either way the compojure route would be the same. (GET
"/:profile-name" [profile-name] ...).
You don't need an extra column in your DB unless you want to do so.
The route/compojure is simply responding to the URL you write out in your
template, or that is requested by some other mecha
in the URL.
I recommend not having a space, take a look at google+ where my username is
"Jarrod Swart" but my profile url is: plus.google.com/+JarrodSwart
Hopefully this helps, or perhaps I misread the thread.
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Awesome, thanks for bringing these great libraries to my attention!
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Thanks for the elaboration, I just wanted to make sure I understood.
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On Monday, March 3, 2014 11:35:58 AM UTC-5, Mikera wrote:
>
>
> Obviously, there are cases where allocating a sequence will be slower than
> iterative techniques. But that's *easy enough to fix by just using
> iterations in those cases* use the right tool for the job and all
> that.
>
>
I
This is a cool project. I primarily use static site generators to build
the front-end for sites that I will use enlive to template inside my app.
I currently use: http://harpjs.com for this purpose because it allows easy
integration of LESS and Jade which are auto recompiled & watched by the de
I do something very similar to this where I parse large CSVs and
keep/discard rows of the CSV based on the values of columns. Like you I
had a hard time "getting" how to use reduce beyond trivial implementations.
I spent some time messing with reduce and learning how to construct more
advanced
> if not, I'd use doseq. This is a guess, but it seems like you don't have
> any need for the results, you just want the side effects of updating the DB
> and storing the file, so I'd just use doseq. I hope that helps!
>
> Shaun
>
> On Monday, February 10, 2014 7:
> (process-api-result!)
> ;; do whatever you want with the state, for now return the entity
> and the result file
> (select-keys [:db-entity :api-result-file])))
>
>
> In this example you'd just call api-call-pipeline! with the database
> entity. This let
I'm having a hard time coming up with a satisfactory way to implement the
following:
1. Call an API with a map from the DB containing various endpoint data
like URL, etc.
2. If the response has an HTTP 200, update the map-from-db and then
write response body to a file.
3. If ste
eshire for JSON?
>
> Yes, I am probably taking the wrong approach. Is the Clojure way to put
> the JSON in Clojure data structures and manipulate it with filters etc?
>
> Many Thanks
>
> Paul
>
>
> On Mon, Jan 27, 2014 at 3:35 PM, Jarrod Swart
> > wrote:
>
&g
It looks like the method exists to me:
https://github.com/jayway/JsonPath/blob/master/json-path/src/main/java/com/jayway/jsonpath/JsonPath.java#L-445-505
It looks like the problem is that you are passing in empty strings:
https://github.com/jayway/JsonPath/blob/master/json-path/src/main/java/com
MBP --> Mac Book Pro
MBA --> Mac Book Air
Best,
Jarrod
On Saturday, January 25, 2014 11:12:37 PM UTC-5, greybird wrote:
>
> In case it helps, I've also seen this CPU eating problem. I'm using:
> REPL-y 0.1.9 Clojure 1.5.1. I don't know what you guys mean by MBP and MBA.
> --mark
>
>
--
--
Y
Awesome, glad you got it working. I highly
recommend: http://pragprog.com/book/dswdcloj/web-development-with-clojure,
for step by step Web Dev in Clojure. Reading through it got me up to speed
really quickly as far as project structure, common libs and practices, etc.
On Saturday, January 25
>
> I have been spending a lot of time thinking about the Clojure newcomer
> perspective lately, and I'd like to work on some things that help smooth
> that path.
I've been thinking about this as well, and I would love to hear your
thoughts. Please elaborate!
On Saturday, January 25, 2014
Nothing sticks out, but a NullPointerException is something I most commonly
get as a result of an incorrect file path. Things I would do:
1. Make sure that (gallery-path) actually exists or is writable.
2. I would do (POST "/upload" [file] (println file) (handle-upload file))),
to inspect what
This was talked about here:
https://groups.google.com/forum/#!searchin/clojure/user$3A$20g$20vim/clojure/XqPGnX5aSAI/PoLYaydgX3cJ
TLDR: The JVM carves out its own chunk of memory from the OS. It then uses
very advanced and finely tuned means to manage said memory. So even though
the app isn't
task.
>
> Cheers,
>
> Josh
>
>
> On Saturday, January 25, 2014 at 7:40, Jarrod Swart wrote:
>
> > I appreciate your outlook, and yes I have definitely discussed the pros
> of Clojure. They are apprehensive in the event they have to outsource
> development
-timestamp function? Checking that link right now.
>
> On Friday, January 24, 2014 9:05:35 PM UTC-8, Jarrod Swart wrote:
>>
>> Well that isn't quite what I meant. In that case you are just casting
>> what is likely the map of upload data to a string.
>>
>> Try
ntire map as:
>
> {:size 17401, :tempfile #, :content-type "image/jpeg", :filename
> "AngryBaby4.jpg"}
>
> How can feed it just the :filename portion of the map as string to the
> add-timestamp function? Checking that link right now.
>
> On Friday, January 24, 201
s => process coordination within the server (perhaps core.async,
> or other scheduling tools)
> - python scripts / micro-apps => separate Compojure routes / APIs within
> the server
> - hacking at the command line => hacking with the REPL
>
>
> On Saturday, 25 January 2014 1
pter alone.
>
> However, looking at http://www.manning.com/fogus2/ I can't seem to find
> it. Which chapter is it?
>
>
>
> On Fri, Jan 24, 2014 at 3:46 PM, Jarrod Swart
> > wrote:
>
>> The second version of The Joy of Clojure talks about building a debugging
>
Well that isn't quite what I meant. In that case you are just casting what
is likely the map of upload data to a string.
Try this:
(defn handle-upload [filename]
(str filename))
Why? This will show you what type of data you receiving on upload. My
guess is that it is a map containing all
I have a general question about application architecture as it relates to
deploying to the server.
Most of my previous development work involved python/php/ruby so we
typically had:
1. One massive framework / application complection nightmare
2. Background scripts run by crons
At prese
ng, as
> (intersection A Everything) = A no matter what A is.
>
>
> On Fri, Jan 24, 2014 at 7:38 PM, Jarrod Swart
> > wrote:
>
>> Good points. But the "identity" thing is still what gets me. What is
>> the identity of an intersection?
>>
>> Lik
> then (identical? (a-set b) a) and thus (not (identical? (a-set b) b)). The
>>> latter is true under the hypothesis for every "real" set but would be false
>>> for (intersection).
>>>
>>> Perhaps this is why (intersection) is not supported at thi
The second version of The Joy of Clojure talks about building a debugging
repl that allows insertion of breakpoints into code. Perhaps something
similar could be done here.
On Friday, January 24, 2014 4:38:59 PM UTC-5, t x wrote:
>
> Found it, apparently it's
>
> debug-repl => swank-clojure =>
The
> latter is true under the hypothesis for every "real" set but would be false
> for (intersection).
>
> Perhaps this is why (intersection) is not supported at this time, even
> though (union) returns an empty set object, the identity element for the
> union operation.
It works for me. I am guessing you are not passing in a string when you
are calling (add-timstamp filename). Which is to say that your param
'filename' is a map not a string.
If you are passing in a map of the upload information you need to grab the
filename for your let:
(let [ext-postion (
Ah cool, thanks for posting your solution!
On Friday, January 24, 2014 3:29:49 PM UTC-5, Tassilo Horn wrote:
>
> Jarrod Swart > writes:
>
> > The reason you can't get this to work is that r/map returns a
>
> > not a for reduce to operate on.
>
> Ah,
The reason you can't get this to work is that r/map returns a
not a for reduce to operate on. I'm not sure of a solution because
I'm not familiar with core.reducers. But reading this:
http://clojure.com/blog/2012/05/08/reducers-a-library-and-model-for-collection-processing.html
informed
me
I have not used core.async much but I did use Go a fair bit and I concur
with what Aaron said.
The missing piece for you Paul is that goblocks\channels are not just a way
to do concurrent work, but also a control flow mechanism.
What Aaron is saying is that by using channels to control various
Jim,
Thanks for the idioms, I appreciate it!
And thanks everyone for the help!
On Tuesday, January 21, 2014 8:43:40 AM UTC-5, Jim foo.bar wrote:
>
> On 21/01/14 13:11, Chris Perkins wrote:
> > This part: (some #{hashed} already-seen) is doing a linear lookup in
> > `already-seen`. Try (contain
Monday, January 20, 2014 11:55:00 PM UTC-7, Jarrod Swart wrote:
>>
>> I'm processing a large csv with Clojure, honestly not even that big (~18k
>> rows, 11mb). I have a list of exported data from a client and I am
>> de-duplicating URLs within the list. My final output i
I'm processing a large csv with Clojure, honestly not even that big (~18k
rows, 11mb). I have a list of exported data from a client and I am
de-duplicating URLs within the list. My final output is a series of
vectors: [url url-hash].
The odd thing is how slow it seems to be going. I have tri
This is exactly what I do and it works great!
On Saturday, January 11, 2014 7:00:22 PM UTC-5, Jan Herich wrote:
>
> I don't recommend using java's built in HTTP retrieval (by passing
> java.net.URL object to enlive html-resource function).
> Not only is it significantly slower then using clj-http
I will second http://clojure-toolbox.com and I also recently found:
http://www.clojuresphere.com/
On Monday, November 18, 2013 4:01:27 PM UTC-5, Brian Craft wrote:
>
> Wow, this result is shocking to me:
>
> In short, Clojure libraries are easy to find, their maintainers are
>> receptive to fee
16, 2013, at 4:34 PM, Jarrod Swart >
> wrote:
>
> I think the more interesting question is: *do web developers need
> Clojure? *If performance were the sole concern then everyone would still
> code web apps in C or assembler. There is great power in abstraction. I
>
I think the more interesting question is: *do web developers need Clojure?
*If performance were the sole concern then everyone would still code web
apps in C or assembler. There is great power in abstraction. I like this
talk by Uncle Bob:
http://skillsmatter.com/podcast/agile-testing/bobs-l
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