Re: 2D graphics options with Clojure?
Batik can serialize to both PNG and PDF. http://xmlgraphics.apache.org/batik/ I currently use Batik in a clojure project doing a lot of drawing of 2d vector-based images. It's a very extensive library but it suits my needs well. On Apr 29, 9:26 pm, stu stuart.hungerf...@gmail.com wrote: Hi, I'm developing a Clojure project that loads and creates a bunch of simple 2D geometry (lines, polygons, beziers, text etc). I need to create in a batch-style way high quality 2D renderings of that geometry, firstly as PNG files and secondly as PDF files. What are my options for doing this from Clojure? So far I can see it might be done with Java2D as I think this can be used server-side to create the PNG files, but not sure about the PDFs. I believe I can use Incanter's wrapping of the Processing libraries for the PNG and again I'm not sure about the PDF option. The Cairo toolkit is also an option via the Gnome Java bindings and Java interop? Are there other options that I'm missing that anyone would like to report on? Thanks in advance, Stu -- 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
Declarative Data Models
G'day everyone, Are there any libraries or projects that are similar to Python Traits or Zope Schemas (http://pypi.python.org/pypi/zope.schema) for clojure. I am developing a compojure application and there is a lot of duplication between areas of the codebase, e.g. - Fields listed on the defrecords - Fields listed on the public constructor function - Fields listed on forms and again on handlers So it is a lot of effort to e.g. add a new field to the data model. I would like something declarative from which I can generate forms, validators etc. Cheers, 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 at http://groups.google.com/group/clojure?hl=en
Re: swank-cdt: Using Slime with the Clojure Debugging Toolkit
I am using maven directly to work with clojure and I had the problem
with the tools.jar, too. I resolved it by adding the following block
to my pom.xml:
profiles
profile
iddefault-tools.jar/id
activation
property
namejava.vendor/name
valueSun Microsystems Inc./value
/property
/activation
dependencies
dependency
groupIdcom.sun/groupId
artifactIdtools/artifactId
version1.6.0/version
scopesystem/scope
systemPath${java.home}/../lib/tools.jar/systemPath
/dependency
/dependencies
/profile
/profiles
After that it is still complaining: warning: unabled to add tools.jar
to classpath. This may cause CDT initialization to fail.
But this does not seem to cause a problem.
Just wanted to share this bit of information with you,
Christian
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Re: Declarative Data Models
Hi David, I can only comment on a subset of your post. Records can be cumbersome to work with during early stages of development, when everything is rather volatile (when isn't it?). You might like to try using maps instead. They are easier to work with when you are working out what properties you need in your records. It's also straightforward to convert from maps to records. Of course there are downsides to this (speed, lack of types) but it can be a useful strategy. Thanks, Ambrose On Sat, Apr 30, 2011 at 4:46 PM, David Jagoe davidja...@gmail.com wrote: G'day everyone, Are there any libraries or projects that are similar to Python Traits or Zope Schemas (http://pypi.python.org/pypi/zope.schema) for clojure. I am developing a compojure application and there is a lot of duplication between areas of the codebase, e.g. - Fields listed on the defrecords - Fields listed on the public constructor function - Fields listed on forms and again on handlers So it is a lot of effort to e.g. add a new field to the data model. I would like something declarative from which I can generate forms, validators etc. Cheers, 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 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: SubVector's (via 'subvec') do not support 'transient'
Check this out: http://clojure.org/Transients On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 -- 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: 2D graphics options with Clojure?
I've also had success with Batik for server-side image generation. As long as you don't mind SVG. Dave On Saturday, April 30, 2011, Nathan Sorenson n...@sfu.ca wrote: Batik can serialize to both PNG and PDF. http://xmlgraphics.apache.org/batik/ I currently use Batik in a clojure project doing a lot of drawing of 2d vector-based images. It's a very extensive library but it suits my needs well. On Apr 29, 9:26 pm, stu stuart.hungerf...@gmail.com wrote: Hi, I'm developing a Clojure project that loads and creates a bunch of simple 2D geometry (lines, polygons, beziers, text etc). I need to create in a batch-style way high quality 2D renderings of that geometry, firstly as PNG files and secondly as PDF files. What are my options for doing this from Clojure? So far I can see it might be done with Java2D as I think this can be used server-side to create the PNG files, but not sure about the PDFs. I believe I can use Incanter's wrapping of the Processing libraries for the PNG and again I'm not sure about the PDF option. The Cairo toolkit is also an option via the Gnome Java bindings and Java interop? Are there other options that I'm missing that anyone would like to report on? Thanks in advance, Stu -- 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: Parallelism
does access to lets say second part of partitioned range cause first part to be materialized or no? Yes, it does. My second question is connected to first. If we have 4 cores and *pmap *starts 4 threads to perform our function on 4 parts of partitioned range, is this happening in parallel, or it is not (because of partitioned ranges dependence or something else)? It's all lazy processing, so you'll get one initial thread (I believe because of a destructuring in pmap). The rest of the threads will start as apply gets elements from result, which may or may not be in parallel depending on scheduling and how much work needs to be done, in this case it isn't much. (partition) will produce four ranges in order, as (future) calls on each are setup by pmap, That is, pmap launches threads sequentially, each already having a range from the partition. -- 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: 2D graphics options with Clojure?
Stu, Just a quick thought, you can use Java2D for the images and then iText to create the PDFs. Brenton On Apr 29, 9:26 pm, stu stuart.hungerf...@gmail.com wrote: Hi, I'm developing a Clojure project that loads and creates a bunch of simple 2D geometry (lines, polygons, beziers, text etc). I need to create in a batch-style way high quality 2D renderings of that geometry, firstly as PNG files and secondly as PDF files. What are my options for doing this from Clojure? So far I can see it might be done with Java2D as I think this can be used server-side to create the PNG files, but not sure about the PDFs. I believe I can use Incanter's wrapping of the Processing libraries for the PNG and again I'm not sure about the PDF option. The Cairo toolkit is also an option via the Gnome Java bindings and Java interop? Are there other options that I'm missing that anyone would like to report on? Thanks in advance, Stu -- 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: SubVector's (via 'subvec') do not support 'transient'
I've read that, and the claim seems to be that Vectors support transience. Within Clojure's abstraction SubVectors are Vectores: (vector? (subvec [1 2 3] 0 2)) = true. On Apr 30, 8:27 am, Armando Blancas armando_blan...@yahoo.com wrote: Check this out:http://clojure.org/Transients On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 -- 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: SubVector's (via 'subvec') do not support 'transient'
On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas armando_blan...@yahoo.com wrote: On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 Check this out: http://clojure.org/Transients There is no mention of subvec on that page. -- 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: SubVector's (via 'subvec') do not support 'transient'
Yes but the contract of subvec is that it returns a persistent vector and the resulting data structure returns true under the vector? predicate. I know that subvec returns a different type because I've looked at the Java source code but that's a leaky abstraction. On Apr 30, 10:57 am, Ken Wesson kwess...@gmail.com wrote: On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas armando_blan...@yahoo.com wrote: On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 Check this out:http://clojure.org/Transients There is no mention of subvec on that page. -- 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: Declarative Data Models
I'm not exactly sure of your specific use case, but you should take a look at clojure.template. It could be what you're looking for. http://clojuredocs.org/clojure_core/clojure.template Paul On Apr 30, 3:39 am, Ambrose Bonnaire-Sergeant abonnaireserge...@gmail.com wrote: Hi David, I can only comment on a subset of your post. Records can be cumbersome to work with during early stages of development, when everything is rather volatile (when isn't it?). You might like to try using maps instead. They are easier to work with when you are working out what properties you need in your records. It's also straightforward to convert from maps to records. Of course there are downsides to this (speed, lack of types) but it can be a useful strategy. Thanks, Ambrose On Sat, Apr 30, 2011 at 4:46 PM, David Jagoe davidja...@gmail.com wrote: G'day everyone, Are there any libraries or projects that are similar to Python Traits or Zope Schemas (http://pypi.python.org/pypi/zope.schema) for clojure. I am developing a compojure application and there is a lot of duplication between areas of the codebase, e.g. - Fields listed on the defrecords - Fields listed on the public constructor function - Fields listed on forms and again on handlers So it is a lot of effort to e.g. add a new field to the data model. I would like something declarative from which I can generate forms, validators etc. Cheers, 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 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: Parallelism
I think you'll find http://blip.tv/file/4645227 relevant to the subject. I shows the inner working of pmap. -- 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: swank-cdt: Using Slime with the Clojure Debugging Toolkit
With Lance's help, I've gotten a better understanding of why CDT fails with Cake. The problem is that Cake makes use of Classlojure, (https://github.com/ninjudd/classlojure), which allows multiple versions of clojure to be loaded in the same vm simultaneously. (It's pretty cool!) Anyways that breaks certain assumptions that CDT makes about what classes are loaded; it shouldn't be too hard to fix but will require a bit of a redesign of cdt, so it will probably be a week or two before I have a fix available. Thanks to Lance for helping me understand. g On Apr 25, 9:41 pm, lance bradley lancebrad...@gmail.com wrote: I'll keep at it too. Make sure you do a manual checkout and use the develop branch. I suspected this would be the fix, but I was wrong- it could still be necessary though:https://github.com/ninjudd/cake/commit/8d70cb88fd83e6aec17a0dac05e97f... On Apr 25, 9:30 pm, George Jahad cloj...@blackbirdsystems.net wrote: not using openjdk. and the tools.jar issue is probably a red herring. i'll try installing cake and see if i can notice anything. definitely want to keep cake users happy! On Apr 25, 8:33 pm, lance bradley lancebrad...@gmail.com wrote: Hey guys- I spent some time trying to get this working today. My experiences mirror Sam's. I'm on a mac, running the jdk that ships with xcode4. According tohttp://developer.apple.com/library/mac/#documentation/Java/Conceptual... , tools.jar does not exist in the xcode jdk. George, are you perhaps using the openjdk? Once I get this straightened out, I'll confirm that cake's classloader hanky panky doesn't cause any other issues :) -lance On Apr 25, 12:12 pm, Sam Aaron samaa...@gmail.com wrote: On 25 Apr 2011, at 19:34, George Jahad wrote: When I press e the mini buffer prompts me to Eval in frame: and I propmpty type s1 to see the following error in the minibuffer: Unexpected exception generated: java.lang.IllegalArgumentException: Invalid method This stuff is all new to me, so I'm likely to be doing something silly. I doubt that. Most likely you have a fairly complicated installation, whose problems i haven't experienced yet. That's pretty unlikely unless it is specifically cake that's the issue. I was running in a completely new and empty project with nothing except clojure and swank-clojure as deps. Sam, can I suggest we eliminate those installation issues by experimenting with a known working project, e.g. logos and seeing if that works for you? This seems to work perfectly :-) No tools.jar errors and I can examine the contents of s1 and s2 - Great stuff! This is really exciting :-) However, if I create a fresh new logos clone, modify the project.clj again, and pull the deps with cake, add the .cake/config jvm.opts line and start a swank server I get the same issues I saw before: * A tools.jar warning * An exception when trying to eval s1 I think that this is pretty clearly a cake issue. I do think it would be cool if this worked out of the box with both lein and cake. I like lein, but cake has better native dependency support which I find extremely useful for my projects. Have any of the cake devs tried the CDT stuff yet? How might I help debug this? 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
