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• KDE's Dolphin Can't See Connected devices such as Nikon, Canon Cameras

  - by Swapnil

  I have noticed this problem across all distros including Kubuntu and openSUSE. Many times my Nikon D 7000 and Canon HF 11 are not seen or mounted by Dolphin. When I connect the Cameras I don't get any notification in the tray which otherwise shows connected device. Ironically when I open Nautilus then I can clearly see the cameras mounted. I also have a request that what these devices don't appear on Dolphin's side panel automatically. It makes life easier for a users. https://bugs.launchpad.net/ubuntu/+source/dolphin/+bug/956806/+attachment/2879913/+files/dolphin.png

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• Mercurial release management. Rejecting changes that fail testing

  - by MYou

  Researching distributed source control management (specifically mercurial). My question is more or less what is the best practice for rejecting entire sets of code that fail testing? Example: A team is working on a hello world program. They have testers and a scheduled release coming up with specific features planned. Upcoming Release: Add feature A Add feature B Add feature C So, the developers make their clones for their features, do the work and merge them into a QA repo for the testers to scrutinize. Let's say the testers report back that "Feature B is incomplete and in fact dangerous", and they would like to retest A and C. End example. What's the best way to do all this so that feature B can easily be removed and you end up with a new repo that contains only feature A and C merged together? Recreate the test repo? Back out B? Other magic?

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• Humor in Documentation

  - by Lex Fridman

  Is a small amount of lighthearted wording or humor acceptable in source code documentation? For example, I have an algorithm that has a message hop around a graph (network) until its path forms a cycle. When this happens it is removed from the queue of the node it last resided on which removes it from memory. I write that in a comment, and finish the comment with "Rest in peace, little guy". That serves very little documenting purpose, but it cheers me up a bit, and I imagine it might cheer up other people I'm working with as they read through the code. Is this an acceptable practice, or should my in-code documentation resemble as much as possible the speeches of 2004 presidential candidate John Kerry? ;-)

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• Automated tests for differencing algorithm

  - by Matthew Rodatus

  We are designing a differencing algorithm (based on Longest Common Subsequence) that compares a source text and a modified copy to extract the new content (i.e. content that is only in the modified copy). I'm currently compiling a library of test case data. We need to be able to run automated tests that verify the test cases, but we don't want to verify strict accuracy. Given the heuristic nature of our algorithm, we need our test pass/failures to be fuzzy. We want to specify a threshold of overlap between the desired result and the actual result (i.e. the content that is extracted). I have a few sketches in my mind as to how to solve this, but has anyone done this before? Does anyone have guidance or ideas about how to do this effectively?

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• Changing in pavucontrols tab "Recording" via command line

  - by Mojo

  I'm using pavucontrol to make changes in the "Recording". I'm changing the source (??) of a Loopback to Null-Output from "Internes Audio Analog Stereo" to "Monitor of Internes Audio Analog Stereo" see the screenshot http://picpaste.de/Bildschirmfoto_vom_2013-10-26_11_32_03-z0KwnFDE.png I'm now looking for a possibility to do this via command line. So far I've done the following: pactl load-module module-null-sink ? creates a new sink pactl load-module module-loopback ? creates a new sink input pactl load-module module-loopback ? creates another sink input pacmd move-sink-input 0 1 ? changes the sink of the sink-input (to Null-Output); this is like changing manually in the pacucontrol tab "Playback". It's just the last part (making the change like shown in the screenshot) via command line that I'm not able to do. I'd be very happy for any advice or suggestions. Thanks already!

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• Default save directory for gnome-screenshot?

  - by trent

  Are there any sort of configuration options for specifying the default save location for gnome-screenshot, or is this hard-coded into the source code? It used to be ~/Desktop, which seems to have changed to ~/Pictures (in 12.04). The only possible solution I've seen is about Setting the default name (as it includes time stamp information now instead of simply Screenshot#), but that solution doesn't really seem ideal to me. Also, this post suggested that the last save location is remembered the next time you take a screenshot, but in my experience, this doesn't seem to be the case. And in any case, following on from that, that entry in gconf-editor doesn't even seem to accurately reflect the last location, so more than likely an entry related to an older version of gnome-screenshot.

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• how to learn Java

  - by Sarang

  This question I am asking because I couldn't find any source which gives complete overview of java development. I just want to know where java technology currently in market & what is preferable for development ! Java always remain top programming language for development point of view. However, java is combo of, j2ee, j2me, jsp, jsf, spring, other frameworks, ui components, jndi, networking tools and various other "J" are there ! However, learning java is definitely dependent on the development requirement, but still, to be a well-experienced java developer, what is the organised way of learning java? What is preferable in current technology ? and what is deprecated, currently ?

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• JSR-107 Early Draft Released

  - by rob.misek

  After nearly 12 years the early draft of JSR-107 has been released. Brian Oliver, co-spec lead, details this update including information on the source, resourcing and the JCP 2.7 process. Check out Brian's update here. "Yesterday the JCP made the important step of posting the Early Draft specification and API for JSR107. [...]While an enormous amount of progress was made last year and early this year (by many people – not so much me) the JSR was somewhat delayed while the legals were resolved, especially with respect to ensuring clean and clear IP for Java itself, the eventual JCache Providers and the community.   Thankfully this stage is complete and we can move forward."

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• What algorithms would suit image colour summarization? [on hold]

  - by codecowboy

  I would like to analyse a set of hundreds of thousands of product images (clothing, electronic goods etc) and retrieve the dominant colours in each. I'm only interested in the top 3 or 4 colours. The aim is to achieve a degree of certainty that x image is mostly red or image y is mostly orange and blue. The images are likely to be colour jpegs of reasonable quality and approximately 100kb in size. I would like to use C# and the solution should run on a Linux server, preferably using open source libraries. What image processing algorithms or techniques might help me achieve this?

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• What does "GPL with classpath exception" mean in practice?

  - by Thilo

  Oracle seems to license all their Java-related open source code under the GPL with a classpath exception. From what I understand, this seems to allow to combine these libraries with your own code into products that do not have to be covered by the GPL. How does this work? What are examples of how I can and cannot use these classes? Why was this new license used as opposed to the LGPL, which seems to allow for pretty much the same things, but is better established and understood? What are the differences to the LGPL?

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• Are flash drives and hard drives thought of as "an ocean of bytes"?

  - by Jian Lin

  Why can a USB Flash drive be formatted as NTFS or FAT32? Is the USB Flash Drive and Hard Drive just to be thought of as "an ocean of bytes"? I get very used to hearing formatting a hard drive as FAT32 or NTFS, but we can also format a USB Flash drive as NTFS or FAT32? Is it because a hard drive or Flash drive both can be thought of as "an ocean of bits" or "an ocean of bytes"? I remember RAM as: it takes 16 bit or 32 bit as an address signal (the 16 or 32 copper footing on the circuit board), and give out 8 bit of data (the other 8 copper footing on the circuit board). So can a hard drive be thought of as working that way too? So that's why a Flash drive can be the same too? Just an "ocean of bytes". But is it true that hard drive's hardware make it an ocean of sector or something else, that is, the smaller unit of read / write is not byte but something else? So with this "ocean of bytes", NTFS has the format that says, "if the first byte is __, then it means __ (it is a file or folder, and link to which sector, indicated by byte 2 and 3, etc, etc)"

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• GPL/LGPL/MPL non-code content license

  - by user1103142

  I want to use a dictionary (basically a text file, and no code) that is included with an open office spell checking plug-in. The plug-in is under the tri-license GPL/LGPL/MPL which I don't understand. is that legal? If it is illegal, what if I wrote a script that uses the said open office plug-in to generate the dictionary (assuming it's technically possible, the script will generate all possible letter permutations, passes it to the plug-in and saves the correct ones) ? I will be using the dictionary in a closed source commercial application. The dictionary is in a language that has very little resources online, and short of making my own dictionary, there aren't any alternatives. Clarification: The script idea I mentioned above, isn't a weird technique, I would generate a document with all possible words and use open office with the plug-in installed to show spelling mistakes and remove them, isn't this the intended use of the plug-in (spell checking)?

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• I Need a recommendation for a CMS application with ECommerce

  - by Griff

  Does anyone have any recommendation for an open source solution for a robust CMS application that has a fully featured ECommerce module? I have been looking into Drupal with Ubercart -- but it looks like Ubercart is not fully up to speed with Drupal 7, and the other modules for Ecommerce don't look as robust. The CMS system should support CMIS as both client and server, and be able to run in a cloud computing environment. The system could be written in any standard web programming language, although Java would be my preference. I'm posting this question here because it seems that all CMS systems provide ECommerce as an afterthought, rather than a core feature.

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• What are best practices for testing programs with stochastic behavior?

  - by John Doucette

  Doing R&D work, I often find myself writing programs that have some large degree of randomness in their behavior. For example, when I work in Genetic Programming, I often write programs that generate and execute arbitrary random source code. A problem with testing such code is that bugs are often intermittent and can be very hard to reproduce. This goes beyond just setting a random seed to the same value and starting execution over. For instance, code might read a message from the kernal ring buffer, and then make conditional jumps on the message contents. Naturally, the ring buffer's state will have changed when one later attempts to reproduce the issue. Even though this behavior is a feature it can trigger other code in unexpected ways, and thus often reveals bugs that unit tests (or human testers) don't find. Are there established best practices for testing systems of this sort? If so, some references would be very helpful. If not, any other suggestions are welcome!

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• Mouse wheel scrolls down, but not up?

  - by HDave

  I've set up a new machine with Ubuntu 12.04 (x64) and have notice that the mouse wheel scrolls down fine, but when I scroll up, it pages down! I've run xev and have verified that scroll up is registering as button 4 and scoll down is button 5. So everything there is fine. I think that button 4 is somehow mapped to page down instead of scroll up. Any idea how to fix? NOTE: I've read the Ubuntu instructions on how to use imwheel to change mouse button mappings, but it doesn't work on 12.04. See here: https://bugs.launchpad.net/ubuntu/+source/imwheel/+bug/1004812

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• Plug-in or framework recommendation for showing content preview fly-over in CMS

  - by Michael Huang

  The requirement is to have either front end plug-in or back end processor that generates the preview of contents (such as images, videos, PDF files, HTML pages) in a preview popup when user mouse hovers the content. I did some research on this, seems that there are assorted jquery plugins for each type of files, but what we are looking for is a framework that handles all types of file previews. Ideally, we want to generate preview images on the backend, considering the cost of retrieving content on front end. I did find some open source or proprietary CMS that provides this feature, but usually they are shipped as one suite and the API for file preview might not be open. Is there any java or jquery framework that handles file preview? Thanks a lot

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• Cannot delete flash9.ocx

  - by Kara Marfia

  Some kinda voodoo, indeed. Bought a new boot drive, and it's time to use the old drive for data. I thought I'd save some time by just wiping the unneeded system folders, instead of backing up, formatting, and restoring. Wups! I have a single Adobe file that absolutely will not be deleted. G:\Windows\SysWOW64\Macromed\Flash\flash9.ocx - though it may have started with a different file name. I'm able to rename it, oddly enough. To be clear, the drive is currently plugged in externally. So I can boot the computer, plug this drive in afterward, and immediately attempt to delete. "File in use" box reads "the action can't be completed because the file is open in another program". I'd format at this point, but it's my white whale, and I have to know if Adobe has inserted some nasty little registry hack - or whatever it is - making this impossible. Since I'm sure it'll come up, I've taken ownership of the file - and this was the trick preventing me from deleting anything else on the drive - full rights on the file permissions, you name it, I've fiddled with the file itself. I'm about to try uninstalling flash from the system drive, in case that aligns the planets properly. Sometimes I wish I were less stubborn, and could just format already.

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• Do I have to deliver my utility and helper code to clients?

  - by deviDave

  Over the years I've created a bunch of Java utility and helper libraries which I just attach to new projects. Then, when I deliver code to my clients, I send all the code except for the libraries themselves (not JARs but source code files). A client complained that he could not compile the project as some libraries were missing. I tried explaining him about my own libraries, but he was not satisfied. How do you handle such situations? I am still apporting changes to these libraries often and I cannot compile JARs each time I start working on some new project. How to overcome this issue - not to share private libraries (personal intellectual property) and have happy clients?

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• Du nouveau sur Chrome OS : l'UI en partie dévoilée, le système d'exploitation de Google attendu fin

  Mise à jour du 14/05/10 Du nouveau sur Chrome OS : l'UI en partie dévoilée Le système d'exploitation de Google attendu fin juin pour les constructeurs Acer devrait présenter le mois prochain le premier portable à tourner sous Chrome OS. C'est en tout cas ce que croit savoir VentureBeat. Pourtant, les notes de développement du système d'exploitation de Google n'indiquent en rien que l'OS est finalisé, ni même qu'il soit sur le point de l'être. Ce qui ne signifie pas non plus que les choses n'avancent pas. Bien au contraire. La version actuelle de Chromium (le build open-source de Chrome OS) est la 0.7.41....

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• run .profile function as cron job

  - by Don

  In the .profile file of the root user I have defined a function, e.g. function printDate() { date } I want to run this function every minute and append the output to cron.log. I tried adding the following crontab entry: * * * * * printDate > $HOME/cron.log 2>&1 But it doesn't work. The cron.log file gets created, but it's empty. I guess this is because the .profile isn't read by cron, so any functions/aliases defined therein are unavailable to it. So I tried changing the crontab entry to: * * * * * source $HOME/.profile;printDate >> $HOME/cron.log 2>&1 But this doesn't work either. It seems cron still doesn't have access to the printDate function because I see the following in cron.log /bin/sh: printDate: not found

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• Correct way to sell commercial product with GPL small scripts in it

  - by Victor

  I'm developing a commercial cms. I'm going to sell this cms. I use jQuery, also I use date and time picker jQuery plugin in my cms, I can say this is just a 1% of my big script, I don't want sell my whole program as GPL because of these two small integrations (jQuery and DateTime picker). Please ask on these questions: I'm worry about license issue. What is the best way to sell my product(licensing type)? Is there any way to provide some partial licenses? I mean just add small notification in my license that the jQuery and The DateTime picker is still in GPL, but other part of this CMS has commercial license? If there isn't any way to sell commercial product as close source with GPL small parts, what is the most strong license for selling my product to keep it safe? Please sorry for my English

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• What kind of spam is this?

  - by SSilk

  I realize this is a pretty vague question, but I occasionally get spam messages through my contact form on a Drupal 6 site. The contact form does not have any anti-spam protection (i.e. math question). The messages I get are all very similar and just jumbled junk, like below, so I think they're all from the same source. Example: ylsaf0V bpsdfuxnhjjd, [url=http://wwgfsggzgyjyjm.com/]wwgrfgzrgsjyjm[/url], [link=http://xmgvyghcuufvb.com/]xmjyhvyjyfjirovb[/link], http://frgxmdghrgruhfc.com/ Anyway, I'm just wondering what the point of such a message is. All the links are dead, it's illegible, and it's not trying to sell me a product or get me to do anything, so I'm a bit perplexed. Is there any way to tell where they're coming from? And how concerned should I be? To be clear, I'm not asking how to avoid them, I realize just adding a simple math challenge or captcha would likely do the job.

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• Apache and Virtual Hosts Problem on OS X

  - by Charles Chadwick

  I recently formatted and installed my iMac. I am running 10.6.5. Prior to this format, I had the default Apache web server up and running with several virtual hosts, and everything ran beautifully. After formatting, I set everything back up again, and now Apache is acting funny. Here is a description of what I have going on. My default root directory for the Apache Web server is pointed to an external hard drive. In my httpd.conf, here is what I have: DocumentRoot "/Storage/Sites" Then a few lines beneath that: <Directory /> Options FollowSymLinks AllowOverride All Order deny,allow Allow from all </Directory> And then beneath that: <Directory "/Storage/Sites"> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny Allow from All </Directory> At the end of this file, I have commented out the user dir include conf file: Include /private/etc/apache2/extra/httpd-userdir.conf And uncommented the virtual hosts conf file: Include /private/etc/apache2/extra/httpd-vhosts.conf Moving on, I have the following entry in my vhosts file: <VirtualHost *:80> DocumentRoot "/Storage/Sites/mysite" ServerName mysite.dev </VirtualHost> I also have a host record in my /etc/hosts file that points mysite.dev to 127.0.0.1 (I also tried using my router IP, 192.168.1.2). The problem I am coming across is, despite having PHP files in /Storage/Sites/mysite, the server is still looking at /Storage/Sites. I know this because in the DocumentRoot contains a php file with phpinfo() (whereas the index.php file in mysite has different code). I have tried setting up other virtual hosts, but they are still doing the same thing. Also, "NameVirtualHost *:80" is in my vhosts file. I saw as a solution on another thread here. Doesn't seem to make a difference. Any ideas on this? Let me know if this is not enough information.

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• Alps touchpad detected as mouse dell inspiron n5110

  - by Shota Bakuradze

  Now I know that this has been asked several times here but I couldn't find any decent solution to it. So I am running the latest Ubuntu on my dell n5110 and my touchpad is detected as a mouse, So I don't have the touchpad options avaliable. can't use multitouch and can't disable it either. I have tried the dkms driver: http://people.canonical.com/~sforshee/alps-touchpad/psmouse-alps-0.10/ but when installing it with dpkg I get the following error: ERROR (dkms apport): unable to determine source package for psmouse-alps-dkms Error! Bad return status for module build on kernel: 3.2.0-25-generic-pae (i686) Consult /var/lib/dkms/psmouse-alps/0.10/build/make.log for more information. I have installed all the updates as well. Can someone help me out with this issue?

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• Where should I store and verify files manipulated by an app

  - by Alan W. Smith

  I'm working on a little Ruby script to move screenshots while renaming them based on a specific convention. I'll be writing tests to confirm the behavior. Ruby has lots of conventions for where to store files (e.g. the "spec" and "features" directories for RSpec and Cucumber, respectively), but I'm not finding best practices for storing files that will be acted upon by the tests. The same goes for a destination for the final copies of the files. So, the question in two parts is: Where should I store files that the test cases will use for a source input. Where should tests that need to write output files send them to.

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