Write/reading java maps and lists using fressian/transit
Hi, I have a program I wrote who needs to serialize java HashMaps and ArrayLists to and from disk but AFAIK (and after some simple tests) it seems fressian writes those maps/lists correctly but read them back as clojure maps and lists (persistent). Is there a way to tell fressian (could be transit too) to read them back as java maps/lists? Just for some context, it's a huge amount of data and it should be serialized in binary format/non-human readable way for performance and space considerations. All the data is composed of simple types (maps, lists, strings, numbers, keywords only. No complex objects) I'm thinking about maybe just using some java serialization library if fressian/transit doesn't support that. Thanks in advance. -- 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/d/optout.
Re: Write/reading java maps and lists using fressian/transit
Ok, I got it. Instead of using transit-clj I can user the java library directly. The reader automatically returns ArrayList and HashMap. Great! On Thursday, August 7, 2014 8:11:50 PM UTC+2, Thomas Heller wrote: Both Transit and fressian take a Handler map as arguments to the reader/writer functions/constructors. So its pretty straightforward to replace the default handlers with handlers that do what you want. I have no example handy but it should be documented in both libraries. Transit has something called mapBuilder, not sure about fressian. HTH, /thomas On Thursday, August 7, 2014 2:48:20 PM UTC+2, Islon Scherer wrote: Hi, I have a program I wrote who needs to serialize java HashMaps and ArrayLists to and from disk but AFAIK (and after some simple tests) it seems fressian writes those maps/lists correctly but read them back as clojure maps and lists (persistent). Is there a way to tell fressian (could be transit too) to read them back as java maps/lists? Just for some context, it's a huge amount of data and it should be serialized in binary format/non-human readable way for performance and space considerations. All the data is composed of simple types (maps, lists, strings, numbers, keywords only. No complex objects) I'm thinking about maybe just using some java serialization library if fressian/transit doesn't support that. Thanks in advance. -- 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/d/optout.
Re: Is Korma still a good current choice for DB backend?
Sean, that was exactly what we did when we changed to yesql. With separated queries our Postgres specialist could optimize each query separately, and for the if nesting we used cond or core.match. Even with all the boilerplate of maintaining separated queries it was still much better than Korma limited DSL. How much better yesql was compared to raw clojure.java.jdbc was an open question though. On Wednesday, July 23, 2014 4:35:14 AM UTC+2, Sean Corfield wrote: I'm curious as to how folks using Yesql deal with conditional queries - which is something we seem to run into a lot. For example, we have some business logic that might optionally be passed a date range and maybe some other qualifier so our query would be: (str SELECT ... main query stuff WHERE basic conditions (when date-range (str AND dateUpdated = ? AND dateUpdated ?)) (when qualifier AND someColumn = ?)) and then some conditions to build the parameters: (cond- basic-params date-range (concat date-range) qualifier (concat [qualifier])) It seems like with Yesql we'd have to have four different query functions and then code like this: (if date-range (if qualifier (query-with-date-range-and-qualifier db basic params (first date-range) (second date-range) qualifier) (query-with-date-range db basic params (first date-range) (second date-range))) (if qualifier (query-with-qualifier db basic params qualifier) (query-basic db basic params))) Sean On Jul 22, 2014, at 6:08 AM, Timothy Baldridge tbald...@gmail.com javascript: wrote: Also, read the rationale behint yesql: https://github.com/krisajenkins/yesql IMO, it hits the nail on the head. ORMs are both crappy object systems and crappy DB DSLs. With a library like yesql you write your queries in pure SQL and get pure data back. Now you can fully leverage both SQL and 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/d/optout.
Re: Meta-eX - The Music of Code
Overtone is amazing, I'm planning on doing some experiments with it as soon as I finish the supercollider book and improve my music theory skills. On Friday, April 11, 2014 4:44:22 PM UTC+2, Sam Aaron wrote: On 10 Apr 2014, at 03:18, Earl Jenkins ejenk...@gmail.com javascript: wrote: Good stuff, all the hard work you've done in the field of live coding, yet no mention of Meta-ex nor clojure in the Computer Music Journal which has a whole issue dedicated to this subject ;( To be honest, Overtone was never targeted at academics. It was built for Clojure hackers to be able to use their programming skills to realise their musical ideas. As such, it's gained a lot of traction with progressional programmers. I'm continuously amazed with what people are doing with Overtone - stretching it in incredible ways. However, I feel that the best is still yet to come. Now is a fantastic time to get involved... Sam --- http://sam.aaron.name -- 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/d/optout.
Re: Latest web framework for clojure
If you are learning go with a simple approach (compojure + http-kit + hiccup for example). If you already know clojure I recommend going with some library that provide everything as data, specially the routes, as the function composition approach of compojure only gets you so far (been there). On Friday, February 28, 2014 12:05:08 PM UTC+1, xavi wrote: I would recommend this combination of libraries: - Compojure - lib-noir - Enlive and Enfocus, for server-side and client-side templating respectively (I've also used Hiccup, but I prefer Enlive/Enfocus because with these, templates are pure HTML; I prefer them even for solo projects, but I would especially recommend them if the HTML/CSS is going to be written by people that don't necessarily know anything about Clojure/ClojureScript). - CongoMongo, if you're using MongoDB as a database (there's also Monger, but I don't have any experience with it) Some time ago I open-sourced a base web, with a complete authentication system, that used these libraries. Maybe you'll find it useful https://github.com/xavi/noir-auth-app Cheers, Xavi On Thursday, February 27, 2014 2:57:07 AM UTC+1, Moritz Ulrich wrote: Om is well-suited to handle the UI-part for you. It doesn't do any server communication or forces you into any particular programming style or project layout. On Thu, Feb 27, 2014 at 2:35 AM, Mark Engelberg mark.en...@gmail.com wrote: As far as I can tell, neither luminus nor caribou are well-suited to building, for example, interactive web apps like this web-based chat room which serves as the Hello World for the Opa web framework: https://github.com/MLstate/opalang/wiki/Hello%2C-chat Is this the kind of thing that Pedestal and Hoplon are meant for? Or Om? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- 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. 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: Do web apps need Clojure?
For me it's about 1 thing: Data. A web application is about taking data from the user, transform it and store it on the database and take data from the database, transform it and show it to the user. Clojure is the best language I used to work with data, it just gives you a composable set of tools and then get out of your way, and there's always macros for the more complex use cases. We have a web application that serves edn data to our clojurescript frontend, our webdevelopers created a new site for mobile in backbone.js that used json, I had just to create a function (ring middleware) that transformed my edn data to json based on the accept header. My 2¢ On Thursday, November 14, 2013 9:11:04 AM UTC+1, Bastien Guerry wrote: Marcus Blankenship mar...@creoagency.com javascript: writes: Brian, that’s really interesting. I think we’re seeing something similar, and are going to look at Pedestal and Caribou as options for a project we’re working on. Are their others we should consider? Perhaps you should consider starting from scratch, in parallel. Maybe that's because I'm a beginner in both the language and in web development, but so far I've found it's the best way to understand the choices behind framaworks. Otherwise I would confuse web development with those choices, and I feel the richness of the Clojure ecosystem is precisely to open your mind about web development. 2 cents, -- Bastien -- -- 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: wally: a alternative way to discover functions
Florian: I filter out all functions that end with ! but I can't know for
sure which functions have side effects.
On Sunday, September 8, 2013 7:24:48 AM UTC+2, Florian Over wrote:
Hi,
you could check for io! to find forms with side-effect, but i think it is
seldom used.
Florian
http://clojuredocs.org/clojure_core/clojure.core/io!
2013/9/8 Maximilien Rzepka maximili...@gmail.com javascript:
Found many times apropos useful...
user (apropos partition)
(partition-by partition-all partition)
But wally approach is really cool.
Thanks for sharing
@maxrzepka
Le jeudi 5 septembre 2013 23:23:28 UTC+2, Islon Scherer a écrit :
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it
still happens every now and then) I had a hard time finding functions using
`doc` or `find-doc`,
normally because I didn't remember the name of the function or because
my only clue was a generic name so find-doc would return too much results.
But one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user= (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
Returns a map from distinct items in coll to the number of times
they appear.
user= (find-by-sample '((1 2 3) (4 5)) (partial 3) [1 2 3 4 5])
-
clojure.core/partition-by
([f coll])
Applies f to each value in coll, splitting it each time f returns
a new value. Returns a lazy seq of partitions.
https://github.com/**stackoverflow/wallyhttps://github.com/stackoverflow/wally
--
--
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: wally: a alternative way to discover functions
I wonder if it would be possible to improve it using the core.typed
library and doing some kind of static analysis similar to Haskell's Hoogle
to filter out candidates.
The problem is most Clojure functions don't use core.type nor are type
annotated.
It would be nice if pure functions had some metadata like :pure true. =)
On Saturday, September 7, 2013 1:53:08 AM UTC+2, Chris-tina Whyte wrote:
Interesting!
Though it executes every function in order to find the matches, which is a
little bit dangerous as Clojure doesn't enforce purity :(
I wonder if it would be possible to improve it using the core.typed
library and doing some kind of static analysis similar to Haskell's Hoogle
to filter out candidates.
On Thursday, September 5, 2013 6:23:28 PM UTC-3, Islon Scherer wrote:
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it still
happens every now and then) I had a hard time finding functions using `doc`
or `find-doc`,
normally because I didn't remember the name of the function or because my
only clue was a generic name so find-doc would return too much results. But
one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user= (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
Returns a map from distinct items in coll to the number of times
they appear.
user= (find-by-sample '((1 2 3) (4 5)) (partial 3) [1 2 3 4 5])
-
clojure.core/partition-by
([f coll])
Applies f to each value in coll, splitting it each time f returns
a new value. Returns a lazy seq of partitions.
https://github.com/stackoverflow/wally
--
--
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: wally: a alternative way to discover functions
Mayank: thanks!
Shaun: I thought about approximations too but that's enough complexity to
be another library by itself.
If there's such a library that I can feed two values and it returns how
similar they are with some percentage I would gladly integrate it with
wally.
Of course wally only works for referential transparent/pure functions but
that's the majority of Clojure functions anyway =)
On Friday, September 6, 2013 6:44:43 AM UTC+2, Shaun Gilchrist wrote:
Very cool! I wonder how hard it would be to have it suggest compositions
if it can not find a direct match?
On Thu, Sep 5, 2013 at 10:34 PM, Mayank Jain fires...@gmail.comjavascript:
wrote:
Looks pretty interesting. Thanks for sharing
On Fri, Sep 6, 2013 at 2:53 AM, Islon Scherer
islons...@gmail.comjavascript:
wrote:
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it
still happens every now and then) I had a hard time finding functions using
`doc` or `find-doc`,
normally because I didn't remember the name of the function or because
my only clue was a generic name so find-doc would return too much results.
But one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user= (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
Returns a map from distinct items in coll to the number of times
they appear.
user= (find-by-sample '((1 2 3) (4 5)) (partial 3) [1 2 3 4 5])
-
clojure.core/partition-by
([f coll])
Applies f to each value in coll, splitting it each time f returns
a new value. Returns a lazy seq of partitions.
https://github.com/stackoverflow/wally
--
--
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.
--
Regards,
Mayank.
--
--
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: wally: a alternative way to discover functions
Thanks for the gist, nice solution but it's not viable for real world code
without some heavy filtering. If I execute it on my current project it
starts a server, sends a bunch of emails and hangs forever =)
On Friday, September 6, 2013 2:12:29 PM UTC+2, Frantisek Sodomka wrote:
Hello,
this gist does the similar thing:
https://gist.github.com/jaked/6084411
Maybe you can find some inspiration in it.
Frantisek
On Thursday, September 5, 2013 11:23:28 PM UTC+2, Islon Scherer wrote:
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it still
happens every now and then) I had a hard time finding functions using `doc`
or `find-doc`,
normally because I didn't remember the name of the function or because my
only clue was a generic name so find-doc would return too much results. But
one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user= (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
Returns a map from distinct items in coll to the number of times
they appear.
user= (find-by-sample '((1 2 3) (4 5)) (partial 3) [1 2 3 4 5])
-
clojure.core/partition-by
([f coll])
Applies f to each value in coll, splitting it each time f returns
a new value. Returns a lazy seq of partitions.
https://github.com/stackoverflow/wally
--
--
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.
wally: a alternative way to discover functions
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it still
happens every now and then) I had a hard time finding functions using `doc`
or `find-doc`,
normally because I didn't remember the name of the function or because my
only clue was a generic name so find-doc would return too much results. But
one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user= (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
Returns a map from distinct items in coll to the number of times
they appear.
user= (find-by-sample '((1 2 3) (4 5)) (partial 3) [1 2 3 4 5])
-
clojure.core/partition-by
([f coll])
Applies f to each value in coll, splitting it each time f returns
a new value. Returns a lazy seq of partitions.
https://github.com/stackoverflow/wally
--
--
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: Multiple REPLs in Emacs? (was: test run startup time
Here at doo we have a shortcut C-c X where X is a number to change between nrepls. The code is in https://github.com/maxweber/emacs.d/blob/master/my/nrepl.el Note that the nrepl ports are hardcoded but it's good enough for us. Hope this helps. -- Islon On Thursday, July 11, 2013 11:53:31 PM UTC+2, Sean Corfield wrote: On Wed, Jul 10, 2013 at 10:53 AM, Jay Fields j...@jayfields.comjavascript: wrote: I work in emacs with 2 repls running - 1 for running my app and 1 for running my tests. What is the magic to get this working and how does Emacs / nrepl.el know which REPL to send commands to? I've often wanted multiple active REPLs (usually for working with multiple projects) but have never figured out how to get it working... -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- -- 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.
Functions that return seqs
One things that always bugged me about clojure is that most functions that work on collections return seqs and not the original data structure type: (= [2 4 6] (- [2 [4]] flatten (conj 6))) = false Every time I transform collections I need to be aware of this. My questions is: is there a philosophical reason for that or it was implement this way because it's easier? Why conj is different? Doesn't it break the principle of least surprise? Thanks, Islon -- -- 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: Functions that return seqs
Thanks for all the answers. Agreed that sequences are a great abstraction (100 functions in 1 data structure instead of 10 to 10) and, as David said, there's value in having the return type to be predictable. I think a 'generics collection functions' library would be nice for those edge cases you want those functions to be generic. I guess the philosophical reason is that 'concrete types don't really matter'... Well, maybe most of the time, but there's cases where the concrete type semantics matters a lot, specially with sets but sometimes with vectors too, right now i'm using into or just calling vec|set or reducers library but maybe I'll try to implement this generics library I just talk about as it's really easy to do that in clojure =) Islon -- -- 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: Lambda: A lniux distro for clojurists
Why not create a shell script? On May 26, 9:32 am, Denis Labaye denis.lab...@gmail.com wrote: Hi, This is a very interesting idea. It would have been of great use when I did a Clojure workshop with complete beginners, with all kinds of OSes (Windows, OSX, ...). I took the Completely packaged VirtualBox image approach, but it is still a big mess: Not everyone have VirtualBox installed (or the right version). And not every flavors of the main editors where correctly configured for Clojure (Emacs, vi). Being able to just boot on a live CD, and have a working Clojure environment would have been great. Also great for distribution: Just burn it on a lot of cheap Cd's, and much more down loadable: A Virtual Box image takes about 2gig, a live CD is 700meg. Cheers, Denis On Thu, May 24, 2012 at 10:11 PM, banseljaj ali.sajid.im...@gmail.comwrote: Hello Guys, I am quite new to clojure, and I am a fan. It's a great thing. One thing that seems missing, however, is a single unified way of setting up the clojure environment. Which seemed pretty daunting to me at first. So I have decided to create a Linux Distro specifically for Clojure development. I have been bouncing this idea in #clojure and it got a good response. So now I have started the complete development effort. My plan so far is as follows. Mission Statement for the Distro The distro should be able to: - Connect to internet. - Be able to convert itself into An VM/Iso/LiveCD etc - Have all IDEs for Clojure installed and preconfigured. - Eclipse - Vim - Emacs - Netbeans - Have a ready to play connection to clojure forums and channels - Have at-least one book on clojure programming on board - Have following clojure specific features - It should have leiningen installed and configured - It should have a local repo of all current clojure plugins - It should have a local cloud on which you can deploy web apps easily - it should have REPLlabs on baord and configured - Have Clojure specific branding The packages that are needed absolutely: - OpenJDK 1.7.0 - Leiningen - Clojure - Eclipse - Vim - Emacs 24 - Netbeans - Emacs Starter kit - CCW plugin for eclipse - Firefox/Chrome - A local webserver - Postgresql - LXDE/XFCE - Gwibber/Other Social network Client - xchat - irssi - git - Regular packages for system functioning. I am still open to ideas. I intend to roll it as a complete distro, so I will love any and all input. For now, the specific things I need input for are: - Who/How to create the art for branding. - Any packages that are missing from the above listing. - Any suggestions for the overall functioning. I will soon have an actual website set up. It is my intention to create a fully functional, independent Development environment for Functional programmers by release 2. Right now, I am working on release 0.0.1. Looking forward to all input. regards. banseljaj -- 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 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
Re: Sum on a list of maps
The best i could think was:
(defn calc-types [coll]
(let [types (map (fn [m] {:type (get m Type) :value (Double/parseDouble
(get m Value))}) coll) ; convert keys to keywords and values to doubles
it1 (sort-by :type types) ; sort by type
a (atom (:type (first it1)))
it2 (partition-by (fn [m] (if (not= (:type m) @a) (do (reset! a
(:type m)) true) false)) it1)] ; partition by type
(map (fn [l] {:type (:type (first l)), :value (reduce + (map :value
l))}) it2))) ; map reduce
Hope it helps.
P.S: Try to use keywords and numbers instead of strings, the function will
be simpler
--
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
Re: Learning clojure - comments on my function?
You probably want something like (defn split-zero [ls] (filter #(not= (first %) 0) (partition-by zero? ls))) -- 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
Re: suggestion for clojure development
I agree with Nicolas, clojure should, at this point, focus on improving the language instead of maintain compatibility, and as most features of other languages can be implemented as macros I think clojure is ahead of the competition. -- 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
Re: lein repl newbie question
Have you tried control+d? -- 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
Re: Re: lein repl newbie question
control+d exits clojure repl -- 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
Re: advantage of dynamic typing
Scala is a OO language with FP support, clojure is a functional language with OO support, they are very different. It's normal for someone with a OO background to think that every method receives a object of some kind and it's good to know it's type in advance, and if you want polymorphism you create a subclass or implement an interface but in clojure functions are polymorphic not classes. Let's take the function first as an example, if you give a String to first you'll get the first char, if you give a vector or list you'll get the first element, if you give a java array you'll get the element at index 0. In scala each collection class has a overriden first method so you can have a static and pre-defined return type, in clojure the first function is itself polymorphic so it doesn't make sense to say that the return type of first is Object because it depends on the parameter. You can code clojure's first function in scala but the parameter and return type would be Object, and you would have to typecast it anyway. (Maybe with scala's extremely fancy type system you can create a generic first function a la clojure but the type signature would make my eyes hurt :) With doc, source (the functions) and the repl, a static typing system would'n be that useful -- 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
Re: Top secret clojure project names
I have a big clojure project at work but it's not a secret. It superseded a old java project, the clojure one is 50 times smaller, 10 times faster and bug free. They had no choice but to accept the new one =) On Sep 1, 6:54 pm, Sean Corfield seancorfi...@gmail.com wrote: On Thu, Sep 1, 2011 at 2:31 PM, JAX jayunit...@gmail.com wrote: Hi guys: I assume some of you have secret Clojure projects at work, that your bosses don't know about. LOL! That would be hard for me - every commit and every ticket update / comment is emailed to the whole project team which includes management :) It does pose an interesting question tho': how many folks are using skunkwork projects to introduce Clojure vs opening getting buy in up front? -- Sean A Corfield -- (904) 302-SEAN An Architect's View --http://corfield.org/ World Singles, LLC. --http://worldsingles.com/ Railo Technologies, Inc. --http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- 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
Re: learning clojure library
You can use (ns-publics 'your.namespace) to see every public intern mapping in this namespace. Islon -- 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
Re: Code structure/design problems
Hi Oskar, I've been a game programmer for more than 5 years going from simple card games to 3D MMORPGs. Even though you can make a simple game in a functional way it would be a big challenge to do the same with a moderately complex game. Games are all about state, your character if full of state, the enemies have state, the world, the AI, the physics, etc. If you're creating a complex game the language you chose is the least of your concerns, the graphics engine, physics engine, AI engine is what really matters. I'm not saying you can't create a game in clojure(I already did) and if your main objective is to learn clojure go ahead, but don't be afraid to model stateful entities. However, if you're thinking about making a complex/commercial game I strongly advise you use a game engine, there are good free game engines out there and it will make your game 2 or 3 orders of magnitude faster to finish. Islon -- 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
Re: Need Help Parsing Clojure Strings
Do you want something like: (vec (.split some-string \\|)) (vec (.split AT|1 Kenilworth Rd||Soapville|ZA|99901-7505|Option value=A == Normal street matchOption value=T == ZIP+4 corrected|013|C065| \\|)) = [AT 1 Kenilworth Rd Soapville ZA 99901-7505 Option value=A == Normal street matchOption value=T == ZIP+4 corrected 013 C065] -- 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
JSON library for clojure 1.3
Is there a clojure json library that works in clojure 1.3? I tried danlarkin/clojure-json but it gives me error: java.lang.IllegalArgumentException: Unable to resolve classname: IPersistentMap, compiling:(org/danlarkin/json/encoder.clj:144) -- 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
Re: JSON library for clojure 1.3
Thanks Sean, org.clojure/data.json worked like a charm. -- 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
Re: JSON library for clojure 1.3
I'll take a look, but I only need basic json encoding/decoding right now. Islon -- 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
Re: Being able to use blank?
I think it's just a sintax problem. (ns test-csv ... (:require [clojure.string :as str])) -- 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
Re: How to Return Vector of Vectors
Simple: conj doesn't mutate the vector, it returns a new vector. Clojure is a (mostly) immutable language, you're trying to solve the problem in a imperative way, you should solve it in a functional way. On Jul 21, 7:48 pm, octopusgrabbus octopusgrab...@gmail.com wrote: (def accumail-url-keys [CA, STREET, STREET2, CITY, STATE, ZIP, YR, BILL_NO, BILL_TYPE]) (defn ret-params Generates all q-parameters and returns them in a vector of vectors. [all-csv-rows] (let [param-vec [[]] ] (doseq [one-full-csv-row all-csv-rows] (let [accumail-csv-row one-full-csv-row q-param (zipmap accumail-url-keys accumail-csv-row) accu-q-param (first (rest (split-at 3 q-param))) billing-param (first (split-at 3 q-param))] (conj param-vec accu-q-param billing-param))) param-vec)) I combine some internal data with each vector returned from clojure- csv's parse-csv. I want to return all that in a new vector of vectors, but param-vec is empty. What am I doing wrong? tnx cmn -- 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
Re: Fixing Java Apache Class error
Mark is right, you should use lein (or cake) repl instead of trying to run clojure on command line. -- 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
Re: Anyone on Google+ yet?
http://gplus.to/islonscherer On Jul 14, 8:55 pm, Sean Corfield seancorfi...@gmail.com wrote: On Thu, Jul 14, 2011 at 4:00 PM, ianp ian.phill...@gmail.com wrote: Looks like G+ is pretty popular with the Clojure crowd :-) I've been using it for a while and I don't see the point. With Facebook for *friends* and Twitter for tech talk (and LinkedIn for professional networking), what purpose does G+ have? I just found it annoying. I recently turned off all email notifications and deleted everyone from my circles and disabled most of the features and now, apart from the occasional annoying red notification icon in Gmail, I can completely ignore it. Is it just a case of ooh, shiny! Google released a new toy! or is there actually some tangible useful benefit to a developer being on G+? -- Sean A Corfield -- (904) 302-SEAN An Architect's View --http://corfield.org/ World Singles, LLC. --http://worldsingles.com/ Railo Technologies, Inc. --http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- 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
Re: Clojure for large programs
I think the issue with large programs is not the language but software engineering. A large program should be well designed and architected, and this is a problem (I think) many people in clojure and functional programming in general have. Clojure is a very high level and concise language so I'll grow my program as I type. I'm not proposing UML or any specific tool or technique, but analysis and design are a important part of a large software. It's easier to understand your problem if you look at your high level documentation/diagrams than look at code. Of course some problems and refactor will happen no matter how well you designed, but you'll understand better what you did and what you should do. Islon On Jul 4, 9:40 am, James Keats james.w.ke...@gmail.com wrote: On Jul 4, 1:26 pm, James Keats james.w.ke...@gmail.com wrote: On Jul 4, 5:45 am, Christian Schuhegger A good book to get you started would SEMANTIC WEB for the WORKING ONTOLOGIST, of which a second edition has recently come out. :-) Sorry about the unintentional to get you started figure of speech; I note you said you already had rdf/owl in your kit. It's not out of underestimating your knowledge (though it might be out of my sense of being mildly overwhelmed by the still remaining reading list I already have of semantic web books, Springer just keeps dropping them like rain. :-) -- 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
date-clj clojure date/time library
Hello people. I've created date-clj, a date/time library for clojure. I know there's clj-time already but I was thinking about something less javaish and more like date.js. Some examples: (date :day 25 :month :november :year 2000) - #Date Sat Nov 25 00:00:00 BRST 2000 (- (today) (set-date :month :december :year 1900)) - #Date Sat Dec 29 16:44:33 BRST 1900 (from-now 1 :year 5 :days) - #Date Wed Jul 04 16:44:33 BRST 2012 (back 1 :month 200 :minutes) - #Date Sun May 29 13:26:33 BRST 2011 (following :friday) - #Date Fri Jul 01 16:47:17 BRST 2011 (- (today) (is? :friday 13)) - false (- (back 3 :days) (was? :sunday)) - true (- (april) sundays first) - #Date Sun Apr 03 00:00:00 BRST 2011 (- (following :month) fridays last) - #Date Fri Jul 29 00:00:00 BRST 2011 (monday) - #Date Mon Jun 27 00:00:00 BRST 2011 (binding [*locale* (Locale/GERMAN)] (names :week-days)) - (Sontag Montag Dienstag Mittwoch Donnerstag Freitag Samstag) The project page is: http://github.com/stackoverflow/date-clj Critics and ideas are welcome =) Regards, Islon -- 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
Re: date-clj clojure date/time library
Thanks for the critic Laurent. set-date is not destructive, it creates a new date and returns it, the original is unaltered, but I agree that the documentation and the function name may be deceiving, I'll think about a better name and change the docs. Islon On Jun 29, 5:29 pm, Laurent PETIT laurent.pe...@gmail.com wrote: Or to be more constructive: maybe set-date al should be renamed set-date! ... ... the more clojurish a library will look like, the more expectations people will have on it (principle of least surprise) even before verifying their assumptions are true (e.g. a pure clojure library = works with immutable -if not persistent- datastructures) My 0.02€, -- Laurent 2011/6/29 Islon Scherer islonsche...@gmail.com: Hello people. I've created date-clj, a date/time library for clojure. I know there's clj-time already but I was thinking about something less javaish and more like date.js. Some examples: (date :day 25 :month :november :year 2000) - #Date Sat Nov 25 00:00:00 BRST 2000 (- (today) (set-date :month :december :year 1900)) - #Date Sat Dec 29 16:44:33 BRST 1900 (from-now 1 :year 5 :days) - #Date Wed Jul 04 16:44:33 BRST 2012 (back 1 :month 200 :minutes) - #Date Sun May 29 13:26:33 BRST 2011 (following :friday) - #Date Fri Jul 01 16:47:17 BRST 2011 (- (today) (is? :friday 13)) - false (- (back 3 :days) (was? :sunday)) - true (- (april) sundays first) - #Date Sun Apr 03 00:00:00 BRST 2011 (- (following :month) fridays last) - #Date Fri Jul 29 00:00:00 BRST 2011 (monday) - #Date Mon Jun 27 00:00:00 BRST 2011 (binding [*locale* (Locale/GERMAN)] (names :week-days)) - (Sontag Montag Dienstag Mittwoch Donnerstag Freitag Samstag) The project page is:http://github.com/stackoverflow/date-clj Critics and ideas are welcome =) Regards, Islon -- 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 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
Re: Clojure ideas repository / todo list
Good ideas, I'm thinking about implementing it as my first clojure web project. 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
Clojure ideas repository / todo list
Is there anyplace people post ideas of libraries/frameworks/functions that would be nice to be implemented in clojure? Sometimes I want to help the community but I don't know what to do (an idea), what's already done (yeah, I know one can search github or ask here but you can't be 100% sure it's not already implemented). Maybe a wiki or something like that would do the job. Thanks in advance, Islon -- 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
Re: Learning Idiomatic Clojure
Read the joy of clojure, it's an amazing book that will teach you the way of clojure. Islon -- 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
problem running tests in leiningen
I have a lein project and I'm trying to run my tests with lein test. The first problem I had was a class not found error in one of my records so I put aot: [namespace.name] in project.clj. It's required that I put all namespaces that contain defrecords/ deftypes in the aot list? After that I tried to run the tests again and got a different error: Exception in thread main java.lang.ClassNotFoundException: clojure.pprint Inside lein swank this code runs and compiles with no problems, do lein execute tests with a different clojure(and/or contrib) version? This is my project.clj (defproject mediaretriever 1.0.0-SNAPSHOT :description ... :dependencies [[org.clojure/clojure 1.2.1] [org.clojure/clojure-contrib 1.2.0] [enlive 1.0.0] [clj-http 0.1.3] [clj-time 0.3.0]] :dev-dependencies [[swank-clojure 1.3.0]] :aot [mediaretriever.media]) Any help is appreciated. Regards Islon -- 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
Re: Search for a node querying on attrs
This is what I did: (let [nodes (html/html-resource (StringReader. body)) meta-extractor (fn [m attr] (first (filter #(= (- % :attrs :name) attr) m))) metas (html/select nodes [:meta]) title (- (meta-extractor metas title) :attrs :content) desc (- (meta-extractor metas description) :attrs :content) date-raw (- (meta-extractor metas date) :attrs :content) keywords-raw (- (meta-extractor metas keywords) :attrs :content) keywords (string/split keywords-raw #, )] Hope it helps. On May 5, 5:18 am, Alfredo alfredo.dinap...@gmail.com wrote: Ty very much :) Alfredo On May 5, 10:05 am, Thorsten Wilms t...@freenet.de wrote: On 05/04/2011 06:23 PM, Alfredo wrote: meta name=keywords content=clojure, is, good / I want to extract only the content part. I recently had related issues, so: (def metas (en/html-snippet meta http-equiv=\Content-Type\ content=\text/html; charset=UTF-8\ / meta name=\keywords\ content=\clojure, is, good\ /)) (en/select metas [[:meta (en/attr= :name keywords)]]) (- (en/select metas [[:meta (en/attr= :name keywords)]]) first :attrs :content) -- Thorsten Wilms thorwil's design for free software:http://thorwil.wordpress.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
Re: problem running tests in leiningen
Thanks Stuart, the tests are working now. On May 6, 12:16 pm, Stuart Halloway stuart.hallo...@gmail.com wrote: I have a lein project and I'm trying to run my tests with lein test. The first problem I had was a class not found error in one of my records so I put aot: [namespace.name] in project.clj. It's required that I put all namespaces that contain defrecords/ deftypes in the aot list? This should not be a requirement. However, you might need to require the namespace containing the class before using the class. After that I tried to run the tests again and got a different error: Exception in thread main java.lang.ClassNotFoundException: clojure.pprint Inside lein swank this code runs and compiles with no problems, do lein execute tests with a different clojure(and/or contrib) version? The standard Clojure repl uses some utility fns from non-core namespaces. Specifically: ;; from main.clj (use '[clojure.repl :only (source apropos dir pst doc find-doc)]) (use '[clojure.java.javadoc :only (javadoc)]) (use '[clojure.pprint :only (pp pprint)]) When you run code outside the REPL, you will need to use these specifically if you need them. Hope this helps. Stu Stuart Halloway Clojure/corehttp://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
Re: record serialization
Thanks for the answers! Some guy told me on irc that you can implement interfaces right in the record definition like (defrecord R [a b] SomeInterface (methods...)) Regards. Islon On Nov 24, 4:25 am, Shantanu Kumar kumar.shant...@gmail.com wrote: Shantanu Kumar wrote: Islon Scherer wrote: Yes, java serialization is what I want but I don't know how to do a record implement the Serializable interface. The following two steps may help: (defrecord Foo [a b]) (extend java.io.Serializable Foo) Oops! that was a bit too fast. Records already implement Serializable. Regards, Shantanu -- 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
record serialization
Hi people, I want to serialize records to further deserializing, is there a way to do that? (pr-str myrecord) doesn't seen to work. I was thinking about something like (to-map record) and (from-map RecordClass record) to serialize and deserialize. Any sugestions? Islon -- 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
Re: record serialization
Yes, java serialization is what I want but I don't know how to do a record implement the Serializable interface. On Nov 23, 2:46 pm, Shantanu Kumar kumar.shant...@gmail.com wrote: Not sure about your exact requirement, but can Java serialization help? You may need to extend the Serializable interface to the records.http://java.sun.com/developer/technicalArticles/Programming/serializa... Regards, Shantanu On Nov 23, 5:50 pm, Islon Scherer islonsche...@gmail.com wrote: Hi people, I want to serialize records to further deserializing, is there a way to do that? (pr-str myrecord) doesn't seen to work. I was thinking about something like (to-map record) and (from-map RecordClass record) to serialize and deserialize. Any sugestions? Islon -- 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
clojure compiler
Ok, this question is not about clojure itself, just a doubt I have. Clojure uses the ASM library to compile code to jvm bytecode. Let's suppose I created the foo.clj and bar.clj source files. The ns foo in foo.clj depends on the functions of bar in bar.clj. How the compiler manages file dependencies? Islon -- 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
Re: ClojureDocs.org
Hi. Does clojuredocs expose any external API (json, xml... rest, webservices, etc) so I can access the docs from my code? Islon On Jul 13, 11:40 pm, j-g-faustus johannes.fries...@gmail.com wrote: On Jul 13, 8:37 pm, Paul Moore p.f.mo...@gmail.com wrote: Can I suggest omitting the Table of contents sidebar when printing? I've not tried printing the document to see how it looks, but removing the sidebar would be an essential starting point... Why would anyone want to print it? I occasionally print longer texts like specifications, but for reference material like Javadoc,ClojureDocs, the Ruby cheat sheet and this page, I think HTML is a far superior format due to links and browser search. And 40+ loose single sheets is a rather cumbersome package unless you have access to a book binder. But if at least two people feel that they would really like to print it out, I can skip the TOC on print. (Making it look _nice_ on paper is a whole different ballgame, then I'd have to look into pagination and page layouts, perhaps by converting to DocBook or LaTex. That's outside the scope of what I intended to do.) On Jul 13, 10:04 pm, Meikel Brandmeyer m...@kotka.de wrote: Some comments after quickly skimming through: ... PS: I'm apologise if some this seems to be nit-picking. Not at all, I'm still learning the language and happy to get the details clarified. The second form of condp and the #_ were omitted simply because I didn't know about them, thanks for the heads-up. For quoted lists, I take your point. For the sequence operations examples it was somewhat deliberate, in that a sequence is a very different datatype from a vector but pretty much the same as a list. I had a bug in some code that conj'ed elements onto a vector, but for some reason it would switch direction in the middle and start adding elements at the opposite end. It took me a while to figure out that it was because concat'ing two vectors doesn't return a vector. So I wanted to emphasize that using a sequence op on anything other than a list is also a conversion from one datatype to another. But I'll take another look, there may be better ways. Thanks for your comments, much appreciated. I'll include them with the next update. Sincerely, jf -- 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
clojure date library
I missed a date/time API in clojure so I made one myself. Is it possible to put it in clojure.contrib? Sugestions, critics and improvements are welcome. - http://www.copypastecode.com/29707/ Islon -- 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
Re: clojure date library
Thanks for the link. I wasn't aware of this library. Islon On May 24, 3:10 pm, David Nolen dnolen.li...@gmail.com wrote: On Mon, May 24, 2010 at 1:53 PM, islon islonsche...@gmail.com wrote: I missed a date/time API in clojure so I made one myself. Is it possible to put it in clojure.contrib? Sugestions, critics and improvements are welcome. -http://www.copypastecode.com/29707/ Islon Have you looked at clj-time?http://github.com/clj-sys/clj-time David -- 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 athttp://groups.google.com/group/clojure?hl=en -- 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
Re: Simlpe style question
You can write this function in clojure in the same style:
(defn move2ascii [move]
(let [f1 (/ move 100)
f2 (mod move 100)
row1 (int (inc (/ f1 8)))
row2 (int (inc (/ f2 8)))
col1 (char (+ (mod f1 8) 97))
col2 (char (+ (mod f2 8) 97))]
(str col1 row1 col2 row2)))
I don't think this is less idiomatic.
Just my 2¢.
Islon
On May 19, 8:56 am, edlich edl...@gmail.com wrote:
Dear Community,
I have one question about readability. As I am not yet deep into
Clojure I can only post scala but I am sure you will get my point.
Recently I wrote the following dump function in Scala:
// convert 1228 to e2e4
def move2ascii(move: Int): String = { // Clojure Style
(((move / 100) % 8 + 97).toChar).toString + ((move / 100) / 8 +
1).toString +
(((move % 100) % 8 + 97).toChar).toString + ((move %
100) / 8 + 1).toString
}
but I could as well have written it like this in an imprative style:
(both are equal)
def move2ascii(move: Int): String = { // Scala Style
val f1 = move / 100
val f2 = move % 100
val row1 = f1 / 8 + 1 // 2 von e2
val row2 = f2 / 8 + 1 // 4 von e4
val col1 = (f1 % 8 + 97).toChar // 5 = e von e2
val col2 = (f2 % 8 + 97).toChar // 5 = e von e4
col1.toString + row1.toString + col2.toString + row2.toString
}
I am sure if you write the first function in Clojure it would look
nearly the same.
My point and my question is:
Isn't the second function easier to read? I know there had been a lot
of threads about readability
in clojure but I am not yet convinced.
In the second version the brain can rely on some steps inbetween which
make it more readable
for me. Or should the first function be split up into several more
functions to become more readable?
I would be happy if you convince me to give Clojure a better chance.
Thanks in advance
Stefan Edlich
P.S.: It's nice to see the upcoming Clojure book in Manning!
--
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
athttp://groups.google.com/group/clojure?hl=en
--
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
Re: setting vars with macro
Thanks for the answers. I realized the macro wasn't a good idea and I will keep using atoms to manage state, just found the reset! function =) Islon On May 17, 10:28 am, Michael Gardner gardne...@gmail.com wrote: On May 15, 2010, at 4:56 PM, islon wrote: I'm working in a simple single-thread console-based rpg game in clojure (a port from my own scala version) and didn't want to use any concurrency structure because the game is single threaded. I was thinking about a macro like (defmacro set!! [s val] `(def ~s ~val)) so I can set my game state without using transactions, agents, etc. Any comments about it? I wrote a Pong clone in Clojure just to stretch my mind a bit. Here's what I do: The entire game world is a single struct-map (may become a record at some point), stored in a global ref. When my world-update timer fires, I deref the world and then pass it to my world-updater functions. These updaters return the new world state, which I then set via ref-set. This is almost as simple as the usual global vars approach, and allowed me to trivially split the world-drawing code into another thread that runs on a different schedule. It also permits stuff like printing out or saving the entire world state very easily. Actually, were it not for Swing, I wouldn't even be using mutable structures at all-- I'd be passing the world state from update to update using tail-recursion. You might also be interested in these links: http://nakkaya.com/2009/12/19/cloning-pong-part-1/(I originally based my Pong game on this code)http://jng.imagine27.com/articles/2009-09-12-122605_pong_in_clojure.html(cloning Pong is apparently pretty popular!)http://briancarper.net/blog/making-an-rpg-in-clojure-part-one-of-many(site down at the moment)http://prog21.dadgum.com/23.html(not Clojure, but interesting for functional games in general) -- 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 athttp://groups.google.com/group/clojure?hl=en -- 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
setting vars with macro
I'm working in a simple single-thread console-based rpg game in clojure (a port from my own scala version) and didn't want to use any concurrency structure because the game is single threaded. I was thinking about a macro like (defmacro set!! [s val] `(def ~s ~val)) so I can set my game state without using transactions, agents, etc. Any comments about it? Islon -- 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
Re: mutability
I added the project in google code (github kept complaining about my public key) http://code.google.com/p/randomrpg/ I reduced the LOC to ~900. I'll try once more to port it to clojure (thanks for the macro Adam), but don't know when i'll be done. Regards. Islon On Nov 21, 4:27 pm, Adam Jones [EMAIL PROTECTED] wrote: On Nov 20, 12:23 pm, islon [EMAIL PROTECTED] wrote: I'm porting my single thread simple mud-like rpg game from scala to clojure and one thing that is annoying me is the code needed to change some var. In scala I do things like that: val player = new Player(...) player.str += 1 in clojure I have to do (player is a struct and its attributes are refs): (def player (Player ...)) (dosync (ref-set player (assoc player :str (inc (:str player) In scala when I want mutability I just define the variable with var instead of val, just one letter, simple and elegant. It's a game, it's full of states and mutability, the game is single thread, I don't need transactions. Am I missing something? If this is really that big of a deal, you could always go the macro route. I'm not experienced enough to say if this is a long-term good decision, but here's a first pass, don't even have Clojure available to try it, attempt at wrapping up Chouser's suggestion (I think := would be better here, but that clashes with keyword definition): (defmacro |= [target attr fun] Updates 'attr' of 'target' by passing the current value to 'fun' and commuting the result, all inside of a transaction `(dosync (commute ~target update-in [~attr] ~fun))) With usage: (|= player :str inc) That look a little better? -Adam --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: mutability
Thanks Chouser.
Just to clarify some points:
I'm not saying scala ir better than clojure or clojure is bad or
immutability is a bad thing, and I know that a true game is
multithread (I'm a game programmer).
Clojure forces you to program in a thread safe way and it's a good
thing when you are doing multithread, but if you are a 100% sure that
your program is singlethreaded and will never
be multithread it's annoying all the ceremony to set a variable.
I don't think scala ir error prone to threading errors because the use
of vals is recommended, I only use vars when strictly needed, but that
is just my opinion.
I miss some easy way to do mutability and object orientation, but
otherwise clojure is great =)
Islon
On 20 nov, 17:38, Chouser [EMAIL PROTECTED] wrote:
On Thu, Nov 20, 2008 at 3:23 PM, islon [EMAIL PROTECTED] wrote:
in clojure I have to do (player is a struct and its attributes are
refs):
(def player (Player ...))
(dosync (ref-set player (assoc player :str (inc (:str player)
Assuming you meant:
(def player (ref {:str 55}))
(dosync (ref-set player (assoc @player :str (inc (:str @player)
This could be written:
(dosync (commute player update-in [:str] inc))
This is somewhat shorter, but also handles more deeply-nested structures
easily.
In scala when I want mutability I just define the variable with var
instead of val, just one letter, simple and elegant.
Simple, perhaps, but very much prone to the kind of threading issues
that Clojure is designed to solve. You may say today that the game is
single-threaded, but if you ever change your mind Clojure will have
helped you structure your code well already -- in Java or Scala you'll
be in for some trouble.
Work to reduce how often you modify the state, using more functional
style until you have exactly the player object you want, and then do a
single commute or alter. You should find you don't need to alter
state in as many places as you would in other languages, and when you
do it's easier to do it in a thread-safe way.
--Chouser
--~--~-~--~~~---~--~~
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
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~--~~~~--~~--~--~---
Re: mutability
Thanks for the ideas =)
I'll use agents to represent state (I don't know how I forgot it,
thanks Harrison), they are a lot more concise than refs and make a lot
more sense in my context.
Only one problem:
user= (def player (agent {:str 2 :dex 3}))
#=(var user/player)
user= @player
{:str 2, :dex 3}
user= (send (:str player) + 1)
java.lang.NullPointerException (NO_SOURCE_FILE:0)
...
Caused by: java.lang.NullPointerException
at clojure.send__547.doInvoke(boot.clj:1044)
at clojure.lang.RestFn.invoke(RestFn.java:445)
at user.eval__2681.invoke(Unknown Source)
at clojure.lang.Compiler.eval(Compiler.java:4106)
... 10 more
Ideas?
Regards.
Islon
On Nov 20, 9:24 pm, Timothy Pratley [EMAIL PROTECTED] wrote:
Given that is the correct way to mutate state, why do we need so much
explicit syntax?
user= (defn += [a b c] (dosync (commute a update-in [b] #(+ c %1
user= (+= player :str 1)
{:str 56}
; are you a giant?
Ok so if I did something like this:
(+= player :int 5)
(+= player :hpmax 10)
in one thread, and on another thread did:
(myset player :int 10)
(myset player :hpmax 88)
The operations might be interleaved whereas it might be desirable to
do the 2 update actions in one transaction to prevent interleaving.
Now this is really up to the programmer as to what is desired, however
a group update is pretty trivial also:
(myset player :int 10 :hpmax 88)
Maybe there is the case where something more complex happens which I
can't imagine and you would still need dosync... but it seems to me
that the majority of occurrences could be hidden away by simple
mutation functions, and these could be written much more generically
than the one above.
Is there an inherent problem with this approach?
Regards,
Tim.
--~--~-~--~~~---~--~~
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
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~--~~~~--~~--~--~---
Re: mutability
I gave up, the resulting code would be a lot more complex than the
scala version.
But thanks for your advices.
If anyone wants to port it I can send the source code, it's ~1000
lines total.
Islon
On Nov 20, 11:38 pm, harrison clarke [EMAIL PROTECTED] wrote:
i was thinking that each stat would be an agent.
whatever boats your float, i guess. i'm probably not the person to go
to about idiomatic code. :V
user (let [player {:str (agent 5)
:dex (agent 5)}
str (:str player)
dex (:dex player)]
(println @str @dex)
(send str + 1)
(send dex * 2)
(println @str @dex)
(await str dex)
(println @str @dex))
5 5
5 5
6 10
nil
--~--~-~--~~~---~--~~
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
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~--~~~~--~~--~--~---
clojure slime
I checkouted the last clojure from svn, swank-clojure and clojure-mode too. When I start slime it give me the following errors: Clojure user= (add-classpath file:home/islon/opt/swank-clojure/) nil user= (require (quote swank)) java.lang.Exception: No such var: swank.util/gen-and-load-class (core.clj:39) user= (swank/ignore-protocol-version 2008-11-02) java.lang.Exception: No such var: swank/ignore-protocol-version (NO_SOURCE_FILE:5) user= (swank/start-server /tmp/slime.22694 :encoding iso-latin-1-unix) java.lang.Exception: No such var: swank/start-server (NO_SOURCE_FILE: 7) user= It worked until I update clojure from svn. Any ideas? Regards. --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: strings
(defn string-reverse [s] (reduce #(str %1 %2) (reverse (seq (. s (split )) You're probably looking for something like this =) On Nov 18, 9:00 pm, joejoe [EMAIL PROTECTED] wrote: hello all, so I'm not only new to this group but I am new to Clojure. I may be going about this all wrong but here's what I got. I want to simply take a string and reverse it, ex: I am cold would become cold am I (haha I just realized that's probably how yoda would say it). So for now I am hard coding my string, so myString =I am cold. How I am thinking of doing this is as follows: (loop [i 0] (when ( i (count myString)) //missing code // // (recur (inc i so this probably isn't a hard thing to do but like I said I am new to this all. I basically need to figure out a way to print each element of myString one at a time, this would allow me to figure out how to reverse it. so to my simple question, is it possible it print each element of a string independently? I know about (first myString), which will give me I printed out three times. So it seems there has to be a way and I just can't seem to figure it out. thanks for any input! -joejoe --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: strings
It doesn't work: (apply str (reverse i am cold)) dloc ma i The correct output is cold am i. You must reverse words not letters. On Nov 18, 11:33 pm, Kevin Downey [EMAIL PROTECTED] wrote: (apply str (reverse I am cold)) shorter and it does the same thing. no need to take out the spaces and put them back in On Tue, Nov 18, 2008 at 5:21 PM, Mark Volkmann [EMAIL PROTECTED] wrote: Here's another solution that came from help on the chat. Thanks Chouser! (apply str (interpose (reverse (.split I am cold On Tue, Nov 18, 2008 at 7:15 PM, islon [EMAIL PROTECTED] wrote: (defn string-reverse [s] (reduce #(str %1 %2) (reverse (seq (. s (split )) You're probably looking for something like this =) On Nov 18, 9:00 pm, joejoe [EMAIL PROTECTED] wrote: hello all, so I'm not only new to this group but I am new to Clojure. I may be going about this all wrong but here's what I got. I want to simply take a string and reverse it, ex: I am cold would become cold am I (haha I just realized that's probably how yoda would say it). So for now I am hard coding my string, so myString =I am cold. How I am thinking of doing this is as follows: (loop [i 0] (when ( i (count myString)) //missing code // // (recur (inc i so this probably isn't a hard thing to do but like I said I am new to this all. I basically need to figure out a way to print each element of myString one at a time, this would allow me to figure out how to reverse it. so to my simple question, is it possible it print each element of a string independently? I know about (first myString), which will give me I printed out three times. So it seems there has to be a way and I just can't seem to figure it out. thanks for any input! -joejoe -- R. Mark Volkmann Object Computing, Inc. -- The Mafia way is that we pursue larger goals under the guise of personal relationships. Fisheye --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: clojure slime
I'll not use slime right now (thanks Bill). swank-clojure will be fixed anytime soon? On Nov 18, 11:15 pm, Stephen C. Gilardi [EMAIL PROTECTED] wrote: SVN version 1110 of Clojure made a breaking change to a feature that swank-clojure is using. For now, I recommend moving back one rev by using: svn up -r 1109 from within your checkout of clojure/trunk. In the past, Jeff has updated swank-clojure very quickly on those rare occasions where Clojure changes enough to break it. Stay tuned. --Steve On Nov 18, 2008, at 8:01 PM, islon wrote: I checkouted the last clojure from svn, swank-clojure and clojure-mode too. When I start slime it give me the following errors: Clojure user= (add-classpath file:home/islon/opt/swank-clojure/) nil user= (require (quote swank)) java.lang.Exception: No such var: swank.util/gen-and-load-class (core.clj:39) user= (swank/ignore-protocol-version 2008-11-02) java.lang.Exception: No such var: swank/ignore-protocol-version (NO_SOURCE_FILE:5) user= (swank/start-server /tmp/slime.22694 :encoding iso-latin-1-unix) java.lang.Exception: No such var: swank/start-server (NO_SOURCE_FILE: 7) user= It worked until I update clojure from svn. Any ideas? Regards. --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Just Wondering: Tag metadata
There's no way to check types at compile time? (defn len2 [#^String x] (. x (length))) (defn wrong [] (len2 10)) Would be good if you could find such errors at compile time. Optional static typing =) Regards. Islon On 12 nov, 21:43, Rich Hickey [EMAIL PROTECTED] wrote: On Nov 12, 7:21 pm, samppi [EMAIL PROTECTED] wrote: Ah, yes. I meant, what are these hints? What does the compiler change? Is it some sort of informal type enforcement or something? The hints are described here: http://clojure.org/java_interop#typehints It is strictly a performance optimization so calls to Java can avoid reflection. There is no compile-time enforcement. Rich --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
primitive meta data
Hi.
I've made a dumb (very dumb) performance comparison function just to play
with the language.
I wanted to mark some symbols with a float primitive type but the compiler
complained so I had to annotate it with the Float class.
Here is the function:
(defn dumb-test []
(let [#^Float f2 567.09723]
(loop [#^Float f 1.8, i 1000]
(if (zero? i)
f
(recur (/ f f2) (dec i))
And the test:
(loop [i 50]
(time (dumb-test))
(if (zero? i)
i
(recur (dec i
There's a way to put a float primitive type in the metadata to prevent the
Float - float unboxing?
Feel free to point some mistakes I probably made, I've just started learn
clojure.
The clojure version took an average: Elapsed time: 217.833342 msecs in my
machine.
The java version (below) took average 23 msecs:
private static float dumbTest() {
float f = 1.8f;
float f2 = 567.09723f;
for(int i = 0; i 1000; i++) {
f /= f2;
}
return f;
}
Regards.
Islon
--~--~-~--~~~---~--~~
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
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~--~~~~--~~--~--~---
Re: primitive meta data
Thanks for the advices. The unchecked version run as fast as java. Before I go solve some interesting problem I have to learn the language ;) Thanks anyway. On Wed, Oct 15, 2008 at 12:04 PM, Chouser [EMAIL PROTECTED] wrote: On Wed, Oct 15, 2008 at 7:08 AM, Parth Malwankar [EMAIL PROTECTED] wrote: On Oct 15, 8:34 am, Islon [EMAIL PROTECTED] wrote: (defn dumb-test [] (let [#^Float f2 567.09723] (loop [#^Float f 1.8, i 1000] (if (zero? i) f (recur (/ f f2) (dec i)) The type hints aren't really helping there, I think. #^Float might help if you were calling a Java function and wanted to avoid the runtime reflection lookup cost, but you're only calling Clojure functions so it doesn't help. On my machine, about 180 msecs To get unboxed primitives, you have to do more like what Parth did: (defn dumb-test [] (let [f2 (float 567.09723)] (loop [f (float 1.2), i (long 1000)] (if (zero? i) f (recur (/ f f2) (dec i)) On my machine that's 48 msecs. But we can do a bit better, just by using unchecked-dec: (defn dumb-test [] (let [f2 (float 567.09723)] (loop [f (float 1.2), i (long 1000)] (if (zero? i) f (recur (/ f f2) (unchecked-dec i)) That's 24 msecs for me. But I don't know how useful these kinds of micro-benchmarks really are. Clojure's fast enough so let's go solve some interesting problems... --Chouser --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: remainder function
Same problem for me. I didn't know there's a find-doc function, thanks! Regards On Wed, Oct 15, 2008 at 6:44 PM, Achim Passen [EMAIL PROTECTED]wrote: Hi, Am 15.10.2008 um 23:35 schrieb Islon: Is there a remainder (rest of the division) function in closure? (as java '%' operator). I browse the docs but couldn't find one. clojure/rem ([num div]) rem[ainder] of dividing numerator by denominator. I ran into the same problem some time ago - find-doc/searching for remainder doesn't work here, for obvious reasons. Maybe it's a good idea to change the doc string? Kind regards, achim --~--~-~--~~~---~--~~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
