Re: New CSS library - Garden
Jeremy, Looks good. I've been tinkering with grid systems on and off for the past month or so. Have you thought of trying your hand at porting something like the Foundation or Gumby grid system? One thing I've discovered, and you might try this with your 960 implementation, is that using higher order functions can be very handy for building them out. For example, a make-grid function which accepts a map of configuration options and returns a function which takes a column number and optional parameters for, say, push and pull. It's a nice way to package things up. I'm close to wrapping up a small colors framework for Garden which will be available in the next beta (hopefully it won't be in beta much longer). When I take it out of beta it'll probably include a Clojure flavored implementation of either the grid system that ships with Bootstrap or Foundation (including the mobile parts). On the side I've been taking of advantage of Clojure to create a new concept for a layout system. It's based on the font-size/line-height ratio and allows for the construction of stylesheets such that the grid system and typography are harmonious. IOW it's a fat pain in the ass, but I don't think I could even fathom the idea of doing it in Sass. TL;DR you have Clojure at your disposal! Though we're SOL on some very nice Sass libraries, we can potentially do more and at a higher level! Thanks for sharing! It's inspiring. On Jun 18, 2013, at 4:41 AM, JeremyS jschoffen@gmail.com wrote: Hi Joel, I have a quick and dirty implementation of a 960-ish grid system using a DSL similar to garden If you want to take a look. On Friday, April 26, 2013 1:01:44 AM UTC+2, Joel Holdbrooks wrote: It's funny you should bring that up! I've actually been working on extracting the grid system from Bootstrap and modular scale from Foundation. But it's mostly been tinkering. I am sorely tempted to give this a try. Please do! If I come up with something I'll be sure to share a Gist. On Thu, Apr 25, 2013 at 3:27 PM, Clinton Dreisbach cli...@dreisbach.us wrote: One interesting thing you could do, given both Garden and ClojureScript, is package CSS frameworks like Twitter Bootstrap or Zurb Foundation as a Clojure library. I am sorely tempted to give this a try. On Thu, Apr 25, 2013 at 6:12 PM, Joel Holdbrooks cjhold...@gmail.com wrote: Murtaza, Thanks for having a look at the library. I'll try to answer you questions as best as I can. How does Garden compare to other pre processors such as sass and less? There are some similarities with Garden and other CSS preprocessors. I've tried to bring over the ones I found most useful when using them. Nested selectors and declarations, parent selector references, and unit arithmetic are all currently available to stylesheet authors. The big difference and, in my opinion, the big win is you can build your stylesheets with regular Clojure. This gives you a lot of power and freedom you won't find anywhere else (AFAIK). To name just a few benefits: There's no file parsing or interpretation step. It's just data transformation. There's no need for any sort of special @mixin syntax or macros, you can use Clojure function. There's no need for an @include directive thanks to clojure namespaces. This can help you organize your stylesheet in ways (I think) are much cleaner and less surprising than SASS and other preprocessors. Thanks to Clojure, Garden (potentially) has clearer syntax than CSS which, if you look closely, can be pretty random in some places. WIth regard to the third point, if you've ever tried using the SMACSS approach to stylesheet authoring with a preprocessor like SASS, you can end up with an explosion of files and tons of @include directives. It's not fun, it's hard to manage, and it's difficult to see where code is coming from - especially when using 3rd-party libraries. Also can I use it in my clojurescript projects ? I mean does it have any java lib dependencies that would prevent it? It does have one small dependency on java.net.URI but I need some time to think about whether or not it would be worth dropping. As far as using it from a ClojureScript project, what sort of use case are you considering? What is the workflow when using Garden? My experience using Garden is probably close to others at this point. It's kind of funny in that regard. I'm building a tool and at the same time am learning how to use it. Personally, I create a namespace for my core stylesheets and separate namespaces for things like utilities and so forth (ie. (ns me.css (:require [me.css.button :as button])) . Then I have a call to function that compiles and saves the stylesheet at the bottom of the core stylesheets. Since I develop with Emacs and nREPL this means all I have to do is reload the file and the CSS is refreshed. It isn't the best approach, but
Re: Clojure in production
We're using Clojure for a year in one of our backend project (real-time social feeds aggregation processing) at AboutEcho.com (Novosibirsk Ulyanovsk, Russia). 1.5.1 + a little bit of ClojureScript for internal dashboard. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: 'foldcat' slower than 'mapv' even for 10,000 elements
Jim - FooBar(); jimpil1...@gmail.com writes: Hi Jim, I'm finding that (r/foldcat (r/map f coll)) is consistently slower than a simple mapv, even for a collection of 10,000 elements and more! I might be wrong, but I think reducers are only faster in situations where you bash many filters/maps/mapcats/etc on top of each other. Bye, Tassilo -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: 'foldcat' slower than 'mapv' even for 10,000 elements
On Wed, Jun 19, 2013 at 4:03 PM, Tassilo Horn t...@gnu.org wrote: I might be wrong, but I think reducers are only faster in situations where you bash many filters/maps/mapcats/etc on top of each other. Or use fold on a large vector with a multi-core machine. You might try fold-into-vec to see if there is any difference; (defn fold-into-vec [coll] Provided a reducer, concatenate into a vector. Note: same as (into [] coll), but parallel. (r/fold (r/monoid into vector) conj coll)) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Clojure in production
Hi, we at doo.net are using clojure and clojurescript for all our backend and web development. We are also still in need for clojure developers. :) Florian 2013/6/19 Nikita Prokopov proko...@gmail.com We're using Clojure for a year in one of our backend project (real-time social feeds aggregation processing) at AboutEcho.com (Novosibirsk Ulyanovsk, Russia). 1.5.1 + a little bit of ClojureScript for internal dashboard. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Clojure in production
I mentioned that! :D On Wednesday, June 19, 2013 9:40:57 AM UTC+2, Florian Over wrote: Hi, we at doo.net are using clojure and clojurescript for all our backend and web development. We are also still in need for clojure developers. :) Florian 2013/6/19 Nikita Prokopov prok...@gmail.com javascript: We're using Clojure for a year in one of our backend project (real-time social feeds aggregation processing) at AboutEcho.com (Novosibirsk Ulyanovsk, Russia). 1.5.1 + a little bit of ClojureScript for internal dashboard. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: 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 javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: core logic
Hello Josh, I would be glad you share your code :) Piotr 2013/6/18 David Nolen dnolen.li...@gmail.com This is a variant of the Zebra/Einstein Puzzle. You can probably Google for miniKanren core.logic zebra and find a solution if you get stuck ;) David On Tue, Jun 18, 2013 at 7:57 AM, Josh Kamau joshnet2...@gmail.com wrote: Hi ; I am trying to learn clojure core.logic. I have gone through some documentation on github by David Nolen. I am now trying to solve this problem: Anyone willing to do some practice can try and share the solution. *SOLVE THIS PROBLEM.* *The Diplomats at Muthaiga Estate* The facts essential to solving the problem - which can indeed be solved by combining deduction, analysis, and sheer persistence - are as follows. Givens 1. There are five houses, each of a different colour and inhabited by people of different nationalities, with different pets, drinks, and pastimes. 2. The English live in the Red house. 3. The Spaniards own the Dog. 4. Coffee is drunk in the Green house. 5. The Ukrainians drink Tea. 6. The Green house is immediately to the right (your right) of the Ivory house. 7. The Chess players own Snails. 8. Scrabble is played in the Yellow house. 9. Milk is drunk in the Middle house. 10. The Norwegians live in the First house on the Left. 11. People who play Cribbage live in the house next to the people who own a pet Fox. 12. Scrabble is played in the house next to the house where the Horse is kept. 13. The Bridge players drink Orange Juice. 14. The Japanese play Monopoly. 15. The Norwegians live next to the Blue house. *ANSWER THE FOLLOWING QUESTIONS*. Who drinks water? And who owns the Zebra? 1. The WATER drinkers are: 1. *English http://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 2. *Spaniardshttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 3. *Norwegianshttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 4. *Japanesehttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 5. I Give UP!! *Tell Me Who Drinks The Waterhttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 2. Who owns the Zebra? 1. *English http://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 2. *Spaniardshttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 3. *Norwegianshttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 4. *Japanesehttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 5. I Give UP!!! *Tell Me Who Drinks The Water And Who Owns The Zebrahttp://www.brocku.ca/sdc/leadership/both_answers.php * -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: core logic
Piotr i will as soon as am done. Josh On Wed, Jun 19, 2013 at 11:26 AM, 良ϖ p2b@gmail.com wrote: Hello Josh, I would be glad you share your code :) Piotr 2013/6/18 David Nolen dnolen.li...@gmail.com This is a variant of the Zebra/Einstein Puzzle. You can probably Google for miniKanren core.logic zebra and find a solution if you get stuck ;) David On Tue, Jun 18, 2013 at 7:57 AM, Josh Kamau joshnet2...@gmail.comwrote: Hi ; I am trying to learn clojure core.logic. I have gone through some documentation on github by David Nolen. I am now trying to solve this problem: Anyone willing to do some practice can try and share the solution. *SOLVE THIS PROBLEM.* *The Diplomats at Muthaiga Estate* The facts essential to solving the problem - which can indeed be solved by combining deduction, analysis, and sheer persistence - are as follows. Givens 1. There are five houses, each of a different colour and inhabited by people of different nationalities, with different pets, drinks, and pastimes. 2. The English live in the Red house. 3. The Spaniards own the Dog. 4. Coffee is drunk in the Green house. 5. The Ukrainians drink Tea. 6. The Green house is immediately to the right (your right) of the Ivory house. 7. The Chess players own Snails. 8. Scrabble is played in the Yellow house. 9. Milk is drunk in the Middle house. 10. The Norwegians live in the First house on the Left. 11. People who play Cribbage live in the house next to the people who own a pet Fox. 12. Scrabble is played in the house next to the house where the Horse is kept. 13. The Bridge players drink Orange Juice. 14. The Japanese play Monopoly. 15. The Norwegians live next to the Blue house. *ANSWER THE FOLLOWING QUESTIONS*. Who drinks water? And who owns the Zebra? 1. The WATER drinkers are: 1. *Englishhttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 2. *Spaniardshttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 3. *Norwegianshttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 4. *Japanesehttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 5. I Give UP!! *Tell Me Who Drinks The Waterhttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 2. Who owns the Zebra? 1. *Englishhttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 2. *Spaniardshttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 3. *Norwegianshttp://www.brocku.ca/sdc/leadership/water_answer_page_1.php * 4. *Japanesehttp://www.brocku.ca/sdc/leadership/water_answer_page_2.php * 5. I Give UP!!! *Tell Me Who Drinks The Water And Who Owns The Zebrahttp://www.brocku.ca/sdc/leadership/both_answers.php * -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an
Namespace qualification of symbols
So, I was thinking that ' and ` were basically the same, unless a ~ was involved somewhere. But I have discovered this. (ns john) (println '(paul)) (println `(paul)) ;;= (paul) (john/paul) With the ' paul is not namespace qualified, while with the ` paul is. Turns out to be a bit of a pain, actually, although I have worked around it. But mostly I am surprised. Is this expected? Phil -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: 'foldcat' slower than 'mapv' even for 10,000 elements
I know I promised a representative example yesterday and didn't
deliver...let's try it now even though I'm outside the comfort of my own
house/desktop...
Right ,we're gonna need a single external dependency which I propose we
dynamically load via pomegranate. like so:
(use '[cemerick.pomegranate :only (add-dependencies)])
(add-dependencies :coordinates '[[org.apache.lucene/lucene-snowball
3.0.3]]
:repositories (merge
cemerick.pomegranate.aether/maven-central {clojars
http://clojars.org/repo}))
(import '[org.tartarus.snowball.ext EnglishStemmer]) ;;english ony
(defn porter-stemmer ;;NEED THIS TO COMPILE
Depending on lang, returns the appropriate porter-stemmer instance.
Using Snowball underneath.
Supported languages include the following:
[danish, french, italian, spanish dutch, german, english, romanian,
turkish, finnish, hungarian, russian, swedish, norwegian, portugese]
If the language you specified does not match anything, an instance of
the english stemmer will be returned.
^org.tartarus.snowball.SnowballProgram
[^String lang]
(case lang
english (EnglishStemmer.) ;;there are actually more langs but
removed them or simplicity
(EnglishStemmer.)) )
(defn porter-stem A function that stems words using Porter's algorithm.
(^String [^String s lang-or-stemmer]
(let [^org.tartarus.snowball.SnowballProgram stemmer
(cond- lang-or-stemmer
(string? lang-or-stemmer) (porter-stemmer))] ;if a
stemmer object was passed in, use it!
(.getCurrent
(doto stemmer
(.setCurrent s)
.stem
([ss] ;;a collection?
(mapv #(porter-stem % english) ss)) )
(def words (- [eating drinking dancing]
cycle
(take 1)
vec))
(defn mapv-res []
(time (porter-stem words)))
(defn foldcat-res []
(time (into [] (r/foldcat (r/map #(porter-stem % english) words )
After letting the jvm warm up a bit I am getting:
Elapsed time: 68.498756 msecs for mapv
Elapsed time: 49.066978 msecs for foldcat (!!!)
HmmI think I see what was happening 2 days ago...when measuring
'mapv' I'd like to reuse the same Object as everything happens serially
(no danger). However when measuring foldcat I must create a new stemmer
object for every single word and then throw it out because there is
parallelism.
I tried foldcat with the same stemmer-object and everything went fine!
I'm pretty sure the stemmer objects are not thread-safe...how am I able
to use the same object from separate threads on different words? I was
expecting seriously broken behaviour but everythig went smoothly...
Jim
On 19/06/13 08:14, Alan Busby wrote:
On Wed, Jun 19, 2013 at 4:03 PM, Tassilo Horn t...@gnu.org
mailto:t...@gnu.org wrote:
I might be wrong, but I think reducers are only faster in situations
where you bash many filters/maps/mapcats/etc on top of each other.
Or use fold on a large vector with a multi-core machine.
You might try fold-into-vec to see if there is any difference;
(defn fold-into-vec [coll]
Provided a reducer, concatenate into a vector. Note: same as (into []
coll), but parallel.
(r/fold (r/monoid into vector) conj coll))
--
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Re: 'foldcat' slower than 'mapv' even for 10,000 elements
On 19/06/13 11:15, Jim wrote: After letting the jvm warm up a bit I am getting: Elapsed time: 68.498756 msecs for mapv Elapsed time: 49.066978 msecs for foldcat (!!!) HmmI think I see what was happening 2 days ago...when measuring 'mapv' I'd like to reuse the same Object as everything happens serially (no danger). However when measuring foldcat I must create a new stemmer object for every single word and then throw it out because there is parallelism. or could it be that I have 4 cores at home but only 2 here? i anything I'd expect faster execution with 4 cores not sloweron the other hand maybe with 4 cores there are more concatenations going on... or could I just be confusing my timings from 2 days ago? maybe... Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Namespace qualification of symbols
On 19/06/13 09:46, Phillip Lord wrote: With the ' paul is not namespace qualified, while with the ` paul is. Turns out to be a bit of a pain, actually, although I have worked around it. But mostly I am surprised. Is this expected? Yes, this is very much expected! :) How else would you be able to write macros without ` ? Vars needs to resolve to something eventually... Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: 'foldcat' slower than 'mapv' even for 10,000 elements
I've got a quadcore machine here: user= (c/bench (porter-stem words)) Evaluation count : 2220 in 60 samples of 37 calls. Execution time mean : *27.571133 ms* Execution time std-deviation : 317.554208 mus Execution time lower quantile : 26.797791 ms ( 2.5%) Execution time upper quantile : 27.939500 ms (97.5%) Overhead used : 10.264005 ns Found 4 outliers in 60 samples (6.6667 %) low-severe 4 (6.6667 %) Variance from outliers : 1.6389 % Variance is slightly inflated by outliers user= (c/bench (into [] (r/foldcat (r/map #(porter-stem % english) words Evaluation count : 5880 in 60 samples of 98 calls. Execution time mean : *10.222315 ms* Execution time std-deviation : 107.594094 mus Execution time lower quantile : 10.027915 ms ( 2.5%) Execution time upper quantile : 10.448660 ms (97.5%) Overhead used : 10.264005 ns Found 3 outliers in 60 samples (5. %) low-severe 1 (1.6667 %) low-mild 2 (3. %) Variance from outliers : 1.6389 % Variance is slightly inflated by outliers Everything seems in order. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Data vs API
Great question and great answers, thank you. Regarding (3), what if want to process various customer order implementations (say, sort them) in a polymorphic way depending just on their total-price? Assuming I do not control the implementations.. Is it ok in this case to define *HasTotalPrice* protocol (or *total-price*multimethod) and code against that? Or is it better to accept a data structure * along with *total-price-fn* function as an additional parameter? * with :*total-price-fn* as a part of the data structure? * with *:total-price* value already computed? Thanks for any hints.. On Thursday, May 3, 2012 8:30:33 AM UTC+12, stuart@gmail.com wrote: I've read in some recent posts that Clorujians prefer data to APIs. I'm not sure I understand what this means, in practice. When I'm in the early stages of developing an application, the data structures undergo a great deal of change. One of the ways, I isolate parts of the code from these sorts of changes is by writing accessor functions. Maybe this is OO thinking but it seems to me a wise application of DRY. Would these accessor functions be considered an API? If so, why should I prefer accessing the raw data structure? If not, what is constitutes an API? (1) You always have to choose a representation for your data. (2) Having chosen a data representation, if you make an accessor function API, you now have two representations. This is the very opposite of DRY. If you think that the representation implied by the accessor functions is better/more stable than the data representation, then choose a data representation like the one implied by your accessor functions. (3) If you have helper functions for dealing with a particular representation, those helpers can and should be separate from the representation itself. For example, a customer order is some combination of maps, vectors, etc. totalPrice is never a member function of some accessor-riddled Order object -- it is instead a plain function that knows how to navigate a data representation (or, via a la carte polymorphism, many different representations). Cheers, Stu Stuart Halloway Clojure/core http://clojure.com -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
anyone interested in authoring a book on Clojure for machine-learning ?
Hi all, I was approached by a publishing company last week and they proposed to me to author this book-title. Unfortunately, as soon as I mentioned this to my supervisor she completely flipped out! She is very much against me writing a book at this point in time, ad thus I've informed the publishers that I cannot proceed... To that end, I'd like to throw this opportunity on the table in case someone else finds it interesting + feasible (without risking a 4-year degree!)... I know several people have a solid background in machine-learning and of course Clojure. If anyone fancies this opportunity please let me know and I'll provide the contact details of the publisher. I cannot post them publicly for obvious reasons (they'd be flooded in emails) and in fact I was only told to forward the details to people that I know personally. I don't really know anyone from this list personally (I feel like I know many people but I 've never actually met anyone in person!), but I trust there will be at least some interest... cheers, Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: New CSS library - Garden
Hi Joel,
Thank for the interest ! You can also take a look at some code have done
around css unit types there https://github.com/JeremS/units. It's got
arithmetic for
units and a namespace dedicated to colors. In it you'll find conversions
between rgb en hsl (that I have taken from the color
libraryhttps://github.com/jolby/colors
)
and the implementation of SASS color helpers. May be you could adapt my
library to garden. From what I have seen Garden uses
protocols to compile different types into css and every unit (including
colors) I define is a record. So you might be able to extend my library
with Garden protocols and use it in garden without much effort. I'd be glad
to see that !
About higher order function I have thought about that and went back, my
first approach made for to complicated function (complected even). With the
actual implementation I can just define stuff like:
(def grid {}) ; grid spec with column, gutter...
(def width (partial grid/witdh grid))
(def push (partial grid/push grid))
and then :
(def side-style [:#side (width 4)
(push 1)])
for a side element spanning onto 4 columns and pushed off 1.
Regarding more advanced systems like Foundation I haven't spent much time
trying to implement them with my DSL.
To do so I need to up my CSS game because I am not yet well versed into the
art of responsive design and it will take me
a bit of time wrapping my head around the media queries involved. If I try
to got responsive, I might probably study
the Unsemantic http://unsemantic.com system from the creator of the 960
one I think.
Good luck with your work and don't hesitate on browsing my github, right
now most of the projects are oriented around CSS and there
might be some ideas there who knows !
On Wednesday, June 19, 2013 8:54:48 AM UTC+2, Joel Holdbrooks wrote:
Jeremy,
Looks good. I've been tinkering with grid systems on and off for the past
month or so. Have you thought of trying your hand at porting something like
the Foundation or Gumby grid system?
One thing I've discovered, and you might try this with your 960
implementation, is that using higher order functions can be very handy for
building them out. For example, a *make-grid* function which accepts a
map of configuration options and returns a function which takes a column
number and optional parameters for, say, push and pull. It's a nice way to
package things up.
I'm close to wrapping up a small colors framework for Garden which will be
available in the next beta (hopefully it won't be in beta much longer).
When I take it out of beta it'll probably include a Clojure flavored
implementation of either the grid system that ships with Bootstrap or
Foundation (including the mobile parts).
On the side I've been taking of advantage of Clojure to create a new
concept for a *layout* system. It's based on the font-size/line-height
ratio and allows for the construction of stylesheets such that the grid
system and typography are harmonious. IOW it's a fat pain in the ass, but I
don't think I could even fathom the idea of doing it in Sass.
TL;DR you have Clojure at your disposal! Though we're SOL on some very
nice Sass libraries, we can potentially do more and at a higher level!
Thanks for sharing! It's inspiring.
On Jun 18, 2013, at 4:41 AM, JeremyS jschof...@gmail.com javascript:
wrote:
Hi Joel,
I have a quick and dirty implementation of a 960-ish grid
systemhttps://github.com/JeremS/cljss-gridusing a DSL similar to garden If
you want to take a look.
On Friday, April 26, 2013 1:01:44 AM UTC+2, Joel Holdbrooks wrote:
It's funny you should bring that up! I've actually been working on
extracting the grid system from Bootstrap and modular scale from
Foundation. But it's mostly been tinkering.
* I am sorely tempted to give this a try.*
Please do! If I come up with something I'll be sure to share a Gist.
On Thu, Apr 25, 2013 at 3:27 PM, Clinton Dreisbach
cli...@dreisbach.uswrote:
One interesting thing you could do, given both Garden and
ClojureScript, is package CSS frameworks like Twitter Bootstrap or
Zurb Foundation as a Clojure library. I am sorely tempted to give this
a try.
On Thu, Apr 25, 2013 at 6:12 PM, Joel Holdbrooks cjhold...@gmail.com
wrote:
Murtaza,
Thanks for having a look at the library. I'll try to answer you
questions as
best as I can.
How does Garden compare to other pre processors such as sass and less?
There are some similarities with Garden and other CSS preprocessors.
I've
tried to bring over the ones I found most useful when using them.
Nested
selectors and declarations, parent selector references, and unit
arithmetic
are all currently available to stylesheet authors.
The big difference and, in my opinion, the big win is you can build
your
stylesheets with regular Clojure. This gives you a lot of power and
freedom
you won't find
Re: Graph API
If you'd like to take a stab at integrating your proposed protocol into Loom, I'd be happy to merge the changes. Thanks! On Tuesday, June 18, 2013 1:12:04 PM UTC-4, Stephen Kockentiedt wrote: That sounds great! I'll mail you my complete code in case you want to take a look at it or want to use parts of it. And in case I can help in any other way, feel free to ask. Am Dienstag, 18. Juni 2013 18:44:33 UTC+2 schrieb Aysylu Biktimirova: Stephen, thanks for reaching out to me! I really like your ideas and agree with the issues you pointed out in Loom's API. I'd like to incorporate your ideas into Loom to improve its API and have 1 graph library in Clojure. I'm actively working on it and would be happy to combine our efforts. There's one implementation of the API, as far as I know, https://github.com/aysylu/loom/blob/titanium/src/loom/titanium.clj, which integrates Loom with Titanium. I'm planning to refactor it out of Loom and release as a separate project. Since I'm the author and the only maintainer of Titanium+Loom, I'd be happy to handle the transition. On Tuesday, June 18, 2013 3:10:23 AM UTC-4, Stephen Kockentiedt wrote: My bad. I did only find the original repository of loom and thought it was abandoned. I should have taken more care while looking at it. My approach was apparently the same in abstracting multiple graph implementations under one API. However, I see some problems with Loom's API, namely: 1. The specifications of the protocol functions are very sparse. E.g., which nodes shall a directed graph return from neighbors? Successors, predecessors or both? 2. How do I know if the graph implementation works by mutating the given object or returning a new one? 3. Loom assumes that every graph is editable. That is definitely not the case. 4. I think a protocol should be as easy to implement as possible. The additional functionality can be given by functions relying on the protocol functions. E.g., in the user API of my code, there is a function direct-predecessors which provides this functionality (albeit slow) for graph implementations which did not implement the corresponding protocol function: (defn direct-predecessors Returns a set or sequence of all nodes n2 for which (has-edge? g n2 n) returns true. May not contain duplicates. [g n] (if (satisfies? p/PPredecessorGraph g) (p/direct-predecessors g n) (filter #(p/has-edge? g % n) (p/nodes g E.g., implementations of Loom's API need to provide two implementations of neighbors and need to implement add-nodes* instead of only add-node*. This may not be much more work to do. However, the easier the API, the more implementations there will be. Please, don't get me wrong. I think that Loom is a great project, has the same goals and, in terms of functionality, is way ahead of my efforts. Said all that, I definitely don't want there to be two competing graph APIs. That would be counterproductive. I see the following possible solutions: 1. I keep the code to myself and let loom be the sole graph API. 2. We transfer the advantages of my proposal to Loom and change its API. Do you know of any implementations of the API outside Loom itself? If there are none, this should be possible without much trouble. Also, the README states that the API is alpha-stage. 3. I publish my code and each API can be implemented in terms of the other one. I'm not sure that this is possible in a simple way. Maybe each protocol could be extended to java.lang.Object, which calls the protocols of the other API, but I don't know if that is feasible. Please tell me what you think. I will also send Aysylu an email so that she can chime in on the conversation. Am Dienstag, 18. Juni 2013 07:02:52 UTC+2 schrieb Rob Lachlan: Loom was indeed working on this, and it's a very nice library. One thing that I particularly liked about Justin's design, was the ability to run a graph algorithm without worrying about conforming to a particular graph representation. See for example the bread first search function, here: https://github.com/jkk/loom/blob/master/src/loom/alg_generic.clj#L110 All the bfs function requires is a neighbors function and and a start vertex. Simple and easy to use. Justin had said that he won't be actively developing loom for the forseeable future; I was hoping to develop it further, but I only got as far as implementing a max flow algorithm before the rest of my life got in the way of my plans. I know that Aysylu was doing a fair amount of work on loom, so I'd guess that her repo is the most advanced one. Stephen: I think the set of protocols above is good, better than Loom's in fact; notably, the decision to make direct-predecessors optional is the correct one, and a lot of graph libraries get that wrong. If you want to compare how loom did it:
Re: anyone interested in authoring a book on Clojure for machine-learning ?
Not sure who approached you, but I've also been approached by a couple of companies in this space and they are essentially scams / not serious publishers. For example, they apparently offer only about 16% royalty to the author, and do essentially no vetting or quality control. The fact that they decided on a title and only then go looking for authors via cold calling and referrals ought to be a warning sign I would of course be delighted to see more Clojure books in this space - but I encourage potential authors to go via a proper publisher (or self publish) On Wednesday, 19 June 2013 12:01:40 UTC+1, Jim foo.bar wrote: Hi all, I was approached by a publishing company last week and they proposed to me to author this book-title. Unfortunately, as soon as I mentioned this to my supervisor she completely flipped out! She is very much against me writing a book at this point in time, ad thus I've informed the publishers that I cannot proceed... To that end, I'd like to throw this opportunity on the table in case someone else finds it interesting + feasible (without risking a 4-year degree!)... I know several people have a solid background in machine-learning and of course Clojure. If anyone fancies this opportunity please let me know and I'll provide the contact details of the publisher. I cannot post them publicly for obvious reasons (they'd be flooded in emails) and in fact I was only told to forward the details to people that I know personally. I don't really know anyone from this list personally (I feel like I know many people but I 've never actually met anyone in person!), but I trust there will be at least some interest... cheers, Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: anyone interested in authoring a book on Clojure for machine-learning ?
On 19/06/13 13:56, Mikera wrote: Not sure who approached you, but I've also been approached by a couple of companies in this space and they are essentially scams / not serious publishers. For example, they apparently offer only about 16% royalty to the author, and do essentially no vetting or quality control. The fact that they decided on a title and only then go looking for authors via cold calling and referrals ought to be a warning sign Not that I'm disagreeing with you but the particular publishers are legit, meaning they are indeed technical book publishers (not text-books); they 've got a proper website and many titles published already. Of course, you saying that they offer 16% royalty to the author makes me suspicious as that is exactly the percentage I was offered...therefore, I can only conclude that you've been approached by the same people... I cannot express any opinions about vetting or quality control as I didn't go forward with this for the reasons mentioned earlier. Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Clojure generates unnecessary and slow type-checks
Jason Wolfe wrote: We thought we were being very careful Sorry, didn't mean to imply that you weren't. ;) It was me who wasn't careful: when I started investigating this, I used a dead-code loop similar to the Gist I posted, which made it look like Clojure 1.2 was much faster than 1.5. I guessed (incorrectly) that you had observed the same effect for the same reasons. -S -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Clojure in production
Hi Plínio, At Relevance, we use Clojure on many consulting projects for clients ranging from small startups to Fortune-500 companies. Datomic, a database, is written primarily in Clojure. http://thinkrelevance.com/ http://datomic.com/ http://clojure.com/ Good luck with your talk. Thanks, -S On Monday, June 10, 2013 5:47:25 PM UTC-4, Plinio Balduino wrote: Hi there I'm writing a talk about Clojure in the real world and I would like to know, if possible, which companies are using Clojure for production or to make internal tools. Thank you Plínio Balduino -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
why is catch defined with bare symbols?
It strikes me as a wart, albeit one that won't be much encountered, that there's no good way to discriminate between the user-defined function catch and the exception-catching magic symbol catch here: user (defn kick [ o] (apply println kick the o)) #'user/kick user (defn catch [ o] (apply println catch the o)) #'user/catch user (try (kick ball) (catch Exception e 1)) kick the ball nil user (let [e 1] (try (kick Exception e 1) (+ 1 2) (catch Exception e 1))) kick the java.lang.Exception 1 1 3 user (try (catch ball) (catch Exception e 1)) CompilerException java.lang.IllegalArgumentException: Unable to resolve classname: ball, compiling:(NO_SOURCE_PATH:1) user (let [e 1] (try (catch Exception e 1) (+ 1 2) (catch Exception e 1))) CompilerException java.lang.RuntimeException: Only catch or finally clause can follow catch in try expression, compiling:(NO_SOURCE_PATH:1) user There is *a* way (b): user (try (user/catch ball) (catch Exception e 1)) catch the ball nil But it's not a very *good* way (c): user (let [catch (fn [ o] (println actually, don't catch))] (try (user/catch ball) (catch Exception e 1))) catch the ball nil (b) works because try just looks for symbols whose first element is the symbol catch. But the workaround fails for (c) because the let-bound symbol isn't the same as the var named user/catch, so you end up with the wrong thing. If catch (and finally, I suppose) were defined in clojure.core, then the parsing code for try could check, not that the first element of a form is the symbol 'catch, but that it resolves to the var #'clojure.core/catch. (I assume it could do that, anyway! It's implemented in Java in the compiler and I'm not sure what information is available at that point.) Since symbols from clojure.core are imported by default, in most cases it wouldn't make a difference. But in cases like (a), (b), and (c), it would allow for sane disambiguation. -- 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] -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Graph API
Thought I'd mention a really nice Graph visualization library that I like. It would be great to include this into any new Graph library project. https://github.com/pallix/lacij From the readme: Lacij is a graph visualization library written in Clojure. It allows the *display and the dynamic modification of graphs as SVG documents* that can be viewed with a *Web browser* or with a *Swing component*. Undo/redo is supported for the dynamic modification. Automatic layout is provided for the visualization. I like graphviz too, but this might be a better fit. Cheers, Avram On Wednesday, June 19, 2013 5:57:02 AM UTC-7, Aysylu Biktimirova wrote: If you'd like to take a stab at integrating your proposed protocol into Loom, I'd be happy to merge the changes. Thanks! On Tuesday, June 18, 2013 1:12:04 PM UTC-4, Stephen Kockentiedt wrote: That sounds great! I'll mail you my complete code in case you want to take a look at it or want to use parts of it. And in case I can help in any other way, feel free to ask. Am Dienstag, 18. Juni 2013 18:44:33 UTC+2 schrieb Aysylu Biktimirova: Stephen, thanks for reaching out to me! I really like your ideas and agree with the issues you pointed out in Loom's API. I'd like to incorporate your ideas into Loom to improve its API and have 1 graph library in Clojure. I'm actively working on it and would be happy to combine our efforts. There's one implementation of the API, as far as I know, https://github.com/aysylu/loom/blob/titanium/src/loom/titanium.clj, which integrates Loom with Titanium. I'm planning to refactor it out of Loom and release as a separate project. Since I'm the author and the only maintainer of Titanium+Loom, I'd be happy to handle the transition. On Tuesday, June 18, 2013 3:10:23 AM UTC-4, Stephen Kockentiedt wrote: My bad. I did only find the original repository of loom and thought it was abandoned. I should have taken more care while looking at it. My approach was apparently the same in abstracting multiple graph implementations under one API. However, I see some problems with Loom's API, namely: 1. The specifications of the protocol functions are very sparse. E.g., which nodes shall a directed graph return from neighbors? Successors, predecessors or both? 2. How do I know if the graph implementation works by mutating the given object or returning a new one? 3. Loom assumes that every graph is editable. That is definitely not the case. 4. I think a protocol should be as easy to implement as possible. The additional functionality can be given by functions relying on the protocol functions. E.g., in the user API of my code, there is a function direct-predecessors which provides this functionality (albeit slow) for graph implementations which did not implement the corresponding protocol function: (defn direct-predecessors Returns a set or sequence of all nodes n2 for which (has-edge? g n2 n) returns true. May not contain duplicates. [g n] (if (satisfies? p/PPredecessorGraph g) (p/direct-predecessors g n) (filter #(p/has-edge? g % n) (p/nodes g E.g., implementations of Loom's API need to provide two implementations of neighbors and need to implement add-nodes* instead of only add-node*. This may not be much more work to do. However, the easier the API, the more implementations there will be. Please, don't get me wrong. I think that Loom is a great project, has the same goals and, in terms of functionality, is way ahead of my efforts. Said all that, I definitely don't want there to be two competing graph APIs. That would be counterproductive. I see the following possible solutions: 1. I keep the code to myself and let loom be the sole graph API. 2. We transfer the advantages of my proposal to Loom and change its API. Do you know of any implementations of the API outside Loom itself? If there are none, this should be possible without much trouble. Also, the README states that the API is alpha-stage. 3. I publish my code and each API can be implemented in terms of the other one. I'm not sure that this is possible in a simple way. Maybe each protocol could be extended to java.lang.Object, which calls the protocols of the other API, but I don't know if that is feasible. Please tell me what you think. I will also send Aysylu an email so that she can chime in on the conversation. Am Dienstag, 18. Juni 2013 07:02:52 UTC+2 schrieb Rob Lachlan: Loom was indeed working on this, and it's a very nice library. One thing that I particularly liked about Justin's design, was the ability to run a graph algorithm without worrying about conforming to a particular graph representation. See for example the bread first search function, here: https://github.com/jkk/loom/blob/master/src/loom/alg_generic.clj#L110 All the bfs function requires is a neighbors function and and a start vertex. Simple and easy to use.
try* macro to catch multiple exception classes with one body. feedback is needed.
Hi, I implemented small macro to catch multiple exception classes with one body. https://gist.github.com/Gonzih/5814945 What do you think? Are there better ways to achieve similar results? Thanks! -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Namespace qualification of symbols
Yes, it's expected, and if you need unqualified names you need to carefully unquote and requote, e.g. (defmacro def-a-fn [body] `(defn ~'a-fn ;; you can only define unqualified names, I think [] ~@body)) On Wed, Jun 19, 2013 at 3:32 AM, Jim jimpil1...@gmail.com wrote: On 19/06/13 09:46, Phillip Lord wrote: With the ' paul is not namespace qualified, while with the ` paul is. Turns out to be a bit of a pain, actually, although I have worked around it. But mostly I am surprised. Is this expected? Yes, this is very much expected! :) How else would you be able to write macros without ` ? Vars needs to resolve to something eventually... Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/**group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to a topic in the Google Groups Clojure group. To unsubscribe from this topic, visit https://groups.google.com/d/** topic/clojure/a4Dp8gdHev8/**unsubscribehttps://groups.google.com/d/topic/clojure/a4Dp8gdHev8/unsubscribe . To unsubscribe from this group and all its topics, send an email to clojure+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com . For more options, visit https://groups.google.com/**groups/opt_outhttps://groups.google.com/groups/opt_out . -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Software project estimation
Hi All, I saw a nice summation of software project estimation and thought some of you might like to view it: http://agile.dzone.com/articles/estimating-unknown-dates-or Enjoy! Alan Thompson -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
extending a protocol to arrays and handle nesting too
Hi again, quick question: Is it at all possible to extend a protocol to a particular primitive array type but also handle nesting of arrays? A double[] is not the same class as double[][] which in turn is not the same Class as double[][][] etc etc and there is no interface tying them together So this means I can't do the regular trick that I can do with any other Collection type. example: (defprotocol Normalisable (normalise [this transformer])) (extend-protocol Normalisable Number (normalise [this transform] (transform this)) String (normalise [this stem] (stem this)) java.util.List ;;if this fires, we're dealing with a Java list-like collection - return a vector (normalise [this transform] (if (instance? java.util.Collection (first this)) ;;handle nesting at the top interface and pray that an extension-point for that type exists (mapv #(normalise % transform) this) (let [top(delay (apply max this)) bottom (delay (apply min this))] (mapv (fn [x] (normalise x #(transform % [top bottom]))) this))) ) and so forth for Collections... for arrays it's the same story (but with amap) but it will only work for 1d arrays. Extending to object-arrays, thinking that the outer array is an Object[], fails miserably. How on earth am I supposed to handle nesting in a general way? thanks in advance... Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: why clojure.lang.Compiler.LOADER is null in clojure 1.5.1
Hi Stream, I have resolved the problem you are referring to. See comment in the issue you have opened https://github.com/apolenur/vert.x-mod-lang-clojure/issues/1 Regards, Alexi On Monday, 17 June 2013 23:15:37 UTC-4, Stream wrote: 在 2013年5月9日星期四UTC+8下午2时00分54秒，Stream写道： Hi all i wanna change the classloader of Clojure RT. in 1.5.1 so , i try to clojure.lang.Var.pushThreadBindings(clojure.lang.RT.map( clojure.lang.Compiler.LOADER, cl) ); but throws exception that cojure.lang.Compiler.LOADER is null Caused by: java.lang.NullPointerException at clojure.lang.RT.baseLoader(RT.java:2043) at clojure.lang.RT.load(RT.java:417) at clojure.lang.RT.load(RT.java:411) at clojure.lang.RT.doInit(RT.java:447) at clojure.lang.RT.clinit(RT.java:329) ... 9 more However this is work in the 1.4.0 someone could tell me what had happened in 1.5.1 thanks -- Sorry , i have disappear a month for my own things.. the problem is still hung. i don't how to resolve it , except back version of clojure to 1.4.0 The intention is that vertx project http://vertx.io/ use clojure as one of scriptlang to execute some logical so, i have own classloader which is cl, could load any other lib of jar dynamically. as @atkaaz desc, it seems LOADER has set NULL. and reason @sean corfield has given. i hope someone could give me a idea thanks again. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
ANN: Potemkin 0.3.0
Potemkin [1] is a collection of facades and utilities that I've found helpful when writing larger-scale libraries or applications. I've never formally announced it before, but I think it's gotten to the point where others can benefit from it. A few highlights: * 'def-map-type', which allows for the definition of custom map-like objects with 10x less code * 'unify-gensyms', which allows for more concise nested syntax-quotes * 'import-vars', which allows for code sprinkled across multiple namespaces to be exposed via a single namespace It's been pointed out before that ideally a library should have no dependencies but Clojure itself, or we risk transitive dependency conflicts when everyone uses different versions of a utility library. In deference to this, Potemkin is licensed such that any piece of code can be simply pasted into your library, as long as there's a comment describing the origin. If anyone has questions, I'm happy to answer them. If anyone has moral or aesthetic objections to 'import-vars', you're not alone, but please remember you're under no obligation to use it. Zach [1] https://github.com/ztellman/potemkin -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: ANN: Potemkin 0.3.0
We've been using Potemkin inside Titanium, Ogre, and Archimedes. It works well for importing functions, but I'm about to do a rewrite of Titanium and Ogre because of complications arising from being clever with importing dynamic vars. I would caution against trying to import dynamic vars (or functions that rely on dynamic vars) between libraries. -Zack On Wednesday, June 19, 2013 3:12:41 PM UTC-4, Zach Tellman wrote: Potemkin [1] is a collection of facades and utilities that I've found helpful when writing larger-scale libraries or applications. I've never formally announced it before, but I think it's gotten to the point where others can benefit from it. A few highlights: * 'def-map-type', which allows for the definition of custom map-like objects with 10x less code * 'unify-gensyms', which allows for more concise nested syntax-quotes * 'import-vars', which allows for code sprinkled across multiple namespaces to be exposed via a single namespace It's been pointed out before that ideally a library should have no dependencies but Clojure itself, or we risk transitive dependency conflicts when everyone uses different versions of a utility library. In deference to this, Potemkin is licensed such that any piece of code can be simply pasted into your library, as long as there's a comment describing the origin. If anyone has questions, I'm happy to answer them. If anyone has moral or aesthetic objections to 'import-vars', you're not alone, but please remember you're under no obligation to use it. Zach [1] https://github.com/ztellman/potemkin -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Loosing a space from an XML document
Hi,
Recently I found myself searching for a white space which got lost
somewhere between reading an XML file and presenting some results from that
via a little webapp.
I think, I could track it down to the following example:
user (clojure.pprint/pprint
(clojure.zip/xml-zip
(clojure.xml/parse
(java.io.ByteArrayInputStream.
(.getBytes
root
ok
spanHello /span spanWorld/span
/ok
ok
spanHello /span dear spanWorld/span
/ok
wheredidmyspacego
spanHello/span spanWorld/span
/wheredidmyspacego
/root)
[{:tag :root,
:attrs nil,
:content
[{:tag :ok,
:attrs nil,
:content
[{:tag :span, :attrs nil, :content [Hello ]}
{:tag :span, :attrs nil, :content [World]}]}
{:tag :ok,
:attrs nil,
:content
[{:tag :span, :attrs nil, :content [Hello ]}
dear
{:tag :span, :attrs nil, :content [World]}]}
{:tag :wheredidmyspacego,
:attrs nil,
:content
[{:tag :span, :attrs nil, :content [Hello]}
{:tag :span, :attrs nil, :content [World]}]}]}
nil]
Take a look at the last tag wheredidmyspacego. The whitespace between
the span tags gets lost whereas the dear in the second example is
preserved including surrounding spaces.
Is this on purpose and/or expected behavior?
Regards,
Stefan
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Re: Performance optimizations dealing with java collections
That's it! Thanks so much for the help! In what cases is a function
turned into a RestFn? variadic clojure or vararg java? I was confused
about how clojure is turned into java, but things are a little clearer now.
(make-array) uses java.lang.reflect.Array.newInstance, which is bad as
well. I'm going to try and push this interpolation down into the java API.
On Tuesday, June 18, 2013 3:00:23 PM UTC-7, John Hume wrote:
Offhand it looks like the only RestFn you call from filter-link is
clojure.core/format. Have you tried replacing that with something like this?
(String/format (.get link 1) (doto (make-array String 1) (aset 0 (.get
link 2)))
I'm not suggesting that's idiomatic, but if it addresses the issue then
you can focus on the difference and look for a happy medium.
On Tue, Jun 18, 2013 at 4:10 PM, Tim Jones timoth...@hp.com javascript:
wrote:
(defn- filter-link
Format lang and cc into the link returned from the product.
[^List link]
[(.get link 0) (.get link 1) (.get link 2) (.get link 3)
(- (.get link 4)
(URLDecoder/decode UTF-8)
(format (.get link 1) (.get link 2)))])
(defn link-info
Retrieve all link info from a product as a lazy-seq of vectors of
String. The function
handles parameter substitution within the URL
[^Product p]
(map filter-link
(.getAllLinkInfo p @lib {h_lang %1$s h_cc %2$s})))
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Factual is hiring Clojure developers
At Factual, we build and constantly refine a canonical index of real world entities: businesses, locations, and products [1]. We also provide ways for other data to be resolved against our index [2] [3], allowing our service to act as a join table for real-world entities, breaking down barriers between otherwise siloed data. This involves a wide variety of challenges in both data analysis and systems engineering, many of which we solve with Clojure [4]. Working at Factual, you have the opportunity to solve difficult problems using large-scale data, and to solve them well. You can work alongside a number of smart, enthusiastic engineers to build, refine, and validate our data pipelines until the output is, well, factual. Factual's headquarters are in LA, and we also have offices in the SF Bay Area. Remote employment is possible, but usually only when the candidate has significant experience in a relevant area, and is considered on a case-by-case basis. Anyone who's interested in learning more should feel free to contact me at z...@factual.com. [1] http://www.factual.com/ [2] http://www.factual.com/data-apis/places/resolve [3] http://www.factual.com/data-apis/places/crosswalk [4] http://www.factual.com/jobs/clojure -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Namespace qualification of symbols
Thank you for this, you just fixed a bug for me :-) I was trying to do some tricky type hinting with definline using amolloy's great answer http://stackoverflow.com/a/11920022 on StackOverflow. Notice that he uses `BufferedImage and not 'BufferedImage. I stupidly figured that this was just a typo due to force of habit or similar and switched to using quote, and discovered that I had problems when BufferedImage wasn't imported when the inlined version of the function was called. Turns out that ` expands an imported class name to the fully qualified name, whereas ' does not. (import java.awt.image.BufferedImage) = #=java.awt.image.BufferedImage `BufferedImage = java.awt.image.BufferedImage 'BufferedImage = BufferedImage Mea culpa. I'm not sure I would ever have made this connection, very timely - thank you. Cheers, Colin On 19 June 2013 20:46, Phillip Lord phillip.l...@newcastle.ac.uk wrote: So, I was thinking that ' and ` were basically the same, unless a ~ was involved somewhere. But I have discovered this. (ns john) (println '(paul)) (println `(paul)) ;;= (paul) (john/paul) With the ' paul is not namespace qualified, while with the ` paul is. Turns out to be a bit of a pain, actually, although I have worked around it. But mostly I am surprised. Is this expected? Phil -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Loosing a space from an XML document
On 19 June 2013 20:32, Stefan Kamphausen ska2...@gmail.com wrote: Take a look at the last tag wheredidmyspacego. The whitespace between the span tags gets lost whereas the dear in the second example is preserved including surrounding spaces. Is this on purpose and/or expected behavior? Stefan, I think this is expected behaviour for XML as a whole: whitespace on its own isn't preserved. If you look at your XML, it actually has lots of whitespace other than the 'wheredidmyspacego' element - there's a newline and fifteen spaces between root and ok which (quite rightly) you don't expect to show up in the output. If whitespace on its own were preserved, you wouldn't be able to use it to lay out your XML like this. See also http://www.usingxml.com/Basics/XmlSpace: The document contains some white space that delimits various aspects of the XML syntax. When the white space is part of the XML syntax, it is discarded by XML parsers and not passed on to processing applications. XML allows for unbounded white space wherever white space is permitted in the XML syntax. This is useful for pretty printing an XML document. Rob -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: extending a protocol to arrays and handle nesting too
I doubt you can extend it to all n-dimensional arrays of foo. What you can do, though, is (defmacro add-support-for-dimension [n] `(extend-protocol ...)) and document that users of your library should invoke this macro once for each number of dimensions that will need supporting. If that set's open-ended, they can construct and eval calls to the macro at run time, though that's a bit icky, every time a new dimension is first encountered. If it's true that if you have a protocol extended to a class C and its subclass S, and give it an S, it will always use the S specialization rather than the C version, and more generally will use the most specific extension that applies to the run-time type of an object, then you can extend the protocol to Object and have the Object version test for an array, handle that case generically, and throw an exception otherwise. You could also petition for clojure to be amended to add dummy types for x-dimensional arrays, arrays of foo, and x-dimensional arrays of foo generally, so one could put something in extend-protocol to extend it to all arrays of (ultimately) doubles or all three-dimensional arrays; but clojure itself changes relatively slowly, so you'd likely have to wait a year or two, if it ever did get done. On Wed, Jun 19, 2013 at 1:59 PM, Jim - FooBar(); jimpil1...@gmail.comwrote: Hi again, quick question: Is it at all possible to extend a protocol to a particular primitive array type but also handle nesting of arrays? A double[] is not the same class as double[][] which in turn is not the same Class as double[][][] etc etc and there is no interface tying them together So this means I can't do the regular trick that I can do with any other Collection type. example: (defprotocol Normalisable (normalise [this transformer])) (extend-protocol Normalisable Number (normalise [this transform] (transform this)) String (normalise [this stem] (stem this)) java.util.List ;;if this fires, we're dealing with a Java list-like collection - return a vector (normalise [this transform] (if (instance? java.util.Collection (first this)) ;;handle nesting at the top interface and pray that an extension-point for that type exists (mapv #(normalise % transform) this) (let [top(delay (apply max this)) bottom (delay (apply min this))] (mapv (fn [x] (normalise x #(transform % [top bottom]))) this))) ) and so forth for Collections... for arrays it's the same story (but with amap) but it will only work for 1d arrays. Extending to object-arrays, thinking that the outer array is an Object[], fails miserably. How on earth am I supposed to handle nesting in a general way? thanks in advance... Jim -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/**group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com . For more options, visit https://groups.google.com/**groups/opt_outhttps://groups.google.com/groups/opt_out . -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: ANN: Potemkin 0.3.0
If anyone has moral or aesthetic objections to 'import-vars', you're not alone, but please remember you're under no obligation to use it. I used lein-clique to make a graph of Lamina's dependencieshttps://github.com/Hendekagon/lein-clique/wiki/images/lamina-in-degree-huge.png(huge PNG), but the use of import-vars caused several mirrored subgraphs which I don't really know how to filter out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Clojure in production
Hi Plinio, I used Clojure at Airtime last year to do load testing and deploy infrastructure. More recently, I'm using Clojure to build Bitcoin-related projects backed by bitcoinj, including this bitcoin scratcher game http://bitcoinscratch.com for fun. On Monday, June 10, 2013 2:47:25 PM UTC-7, Plinio Balduino wrote: Hi there I'm writing a talk about Clojure in the real world and I would like to know, if possible, which companies are using Clojure for production or to make internal tools. Thank you Plínio Balduino -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: ANN: Potemkin 0.3.0
We're starting to use potemkin at Prismatic, and the part we've found most useful which Zach didn't mention in his post are the smart types. Especially definterface+, which is like a love child of defprotocol and definterface: - Same syntax as defprotocol, and defines functions in your namespace that wrap the interface functions (without extend-protocol support, obviously) - Allows for primitive arguments and return values (like clojure.core/definterface), which are propagated to the wrapper functions for maximal performance - Doesn't re-evaluate if the body has not changed, which can make repl development less painful (especially when used with its defrecord+ counterpart). On Wednesday, June 19, 2013 12:12:41 PM UTC-7, Zach Tellman wrote: Potemkin [1] is a collection of facades and utilities that I've found helpful when writing larger-scale libraries or applications. I've never formally announced it before, but I think it's gotten to the point where others can benefit from it. A few highlights: * 'def-map-type', which allows for the definition of custom map-like objects with 10x less code * 'unify-gensyms', which allows for more concise nested syntax-quotes * 'import-vars', which allows for code sprinkled across multiple namespaces to be exposed via a single namespace It's been pointed out before that ideally a library should have no dependencies but Clojure itself, or we risk transitive dependency conflicts when everyone uses different versions of a utility library. In deference to this, Potemkin is licensed such that any piece of code can be simply pasted into your library, as long as there's a comment describing the origin. If anyone has questions, I'm happy to answer them. If anyone has moral or aesthetic objections to 'import-vars', you're not alone, but please remember you're under no obligation to use it. Zach [1] https://github.com/ztellman/potemkin -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: try* macro to catch multiple exception classes with one body. feedback is needed.
Hi, Am Mittwoch, 19. Juni 2013 17:00:17 UTC+2 schrieb Max Gonzih: Hi, I implemented small macro to catch multiple exception classes with one body. https://gist.github.com/Gonzih/5814945 What do you think? Are there better ways to achieve similar results? I would just extend try a simply as possible: simply add the catch-all, but keep catch and finally as is. Here my try: (defmacro try* [ body] (let [catch-all? #(and (seq? %) (= (first %) 'catch-all)) expand-catch (fn [[_catch-all exceptions catch-tail]] (map #(list* 'catch % catch-tail) exceptions)) transform(fn [form] (if (catch-all? form) (expand-catch form) [form]))] (cons `try (mapcat transform body (try* (println :a) (println :b) (catch-all [A B C] e (println (type e))) (catch D _ (println Got D!)) (finally (println Finally!))) expands to (try (println :a) (println :b) (catch A e (println (type e))) (catch B e (println (type e))) (catch C e (println (type e))) (catch D _ (println Got D!)) (finally (println Finally!))) Kind regards Meikel -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
