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• Why is my ruby application running faster the second time?

  - by Omega

  I'm creating a Ruby game using the Gosu framework. All good. Sometimes, when I run the game, it has some kind of slow startup, and probably it will be rather slow during the whole game. So I close it and... open it again. It is very likely that it will startup quickly and the whole game will run smoothly and fast. Why is that? What is this phenomenon? Is it faster because of some cache stored or whatever since the first run? (But why would cache be stored? If the app dies, I would expect no references at all etc...) Ruby, Windows 7.

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• License for library developed with commercial program

  - by Overv

  I'm developing a commercial application that largely depends on the functionality of a library that will be developed with it. I'd like to open-source this library, because it offers functionality that is not found elsewhere and can be useful in other applications. However, I will also use it in my own commercial application. I don't want to publish the source of the main application, but it is definitely not a derived work (think of calculator app using GPL licensed library to calculate sine). And if someone else commercially uses the library, I want to require them to publish any changes made. Is the GPL license suitable for this or is LGPL perhaps what I need?

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• Immutable design with an ORM: How are sessions managed?

  - by Programmin Tool

  If I were to make a site with a mutable language like C# and use NHibernate, I would normally approach sessions with the idea of making them as create only when needed and dispose at request end. This has helped with keeping a session for multiple transactions by a user but keep it from staying open too long where the state might be corrupted. In an immutable system, like F#, I would think I shouldn't do this because it supposes that a single session could be updated constantly by any number of inserts/updates/deletes/ect... I'm not against the "using" solution since I would think that connecting pooling will help cut down on the cost of connecting every time, but I don't know if all database systems do connection pooling. It just seems like there should be a better way that doesn't compromise the immutability goal. Should I just do a simple "using" block per transaction or is there a better pattern for this?

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• Xubuntu all Icons disappeared

  - by user1392185

  I'm running Xubuntu 12.04.1 with kernel Xen4.1-amd64 and the following problem is mine: Nearly all icons have been replaced by the default "no icon available"-icon, even on the login screen and the all icons in software like e.g. Firefox and the icons I manually assigned to launchers, too. Changing the icon theme does not seem to affect this. The only icons that did not disappear are: LibreOffice, gThumb, Simplescan, Ristretto and in the XFCE menu office, tools and graphics. How could I bring the icons back? EDIT: When I tried to use Ristretto the following error showed up: Could not load image-loader module /usr/lib/x68_64-linux-gnu/gdk-pixbuf-2.0/2.12.0/loaders/libpixbufloader-png.so Unable to open shared-object-file I/O error (Had to translate this to English.)

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• WebLogic Server 12c Launch Event - 1 December 2011

  - by Chuck Speaks

  Introducing Oracle WebLogic Server 12c, the #1 Application Server Across Conventional and Cloud Environments Please join Hasan Rizvi on December 1, as he unveils the next generation of the industry’s #1 application server and cornerstone of Oracle’s cloud application foundation—Oracle WebLogic Server 12c. Hear, with your fellow IT managers, architects, and developers, how the new release of Oracle WebLogic Server is: Designed to help you seamlessly move into the public or private cloud with an open, standards-based platform Built to drive higher value for your current infrastructure and significantly reduce development time and cost Optimized to run your solutions for Java Platform, Enterprise Edition (Java EE); Oracle Fusion Middleware; and Oracle Fusion Applications Enhanced with transformational platforms and technologies such as Java EE 6, Oracle’s Active GridLink for RAC, Oracle Traffic Director, and Oracle Virtual Assembly Builder Don't miss this online launch event. Register now.

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• problem connecting to wifi at long range

  - by user171849

  I am using a compaq 8510p with internal wifi. The campground supplies an open wifi hotspot, to which I can connect at close range (30 ft) but not at longer range (300 ft). Connecting a usb dongle just confuses things. The dongle tries to lock on to all the wifi networks in my vicinity. They are password protected, but my laptop still tries to connect. I connected a cantenna via usb port and got a signal which said I was connected, but all web pages returned error 'unable to connect to server', despite having three bars showing on the wifi icon. I believe it because the installed wifi card interacts with the usb dongle. If so what can I do about it? I am using Ubuntu 12.04.

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• Crawling for geotagged data

  - by abe3

  I have no experience with web crawlers -- but I know that Apache maintains an open source web crawler called "Lucene." How would I go about writing such a crawler to search the web for geo tagged data close to a particular location? What would a general road map look like? How do I pick which slice of the web to crawl? Do I use regular expressions to find things that look like longitudes and latitudes? What does a general sketch of that solution look like?

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• Go passe en version 1.0, le langage de Google est prêt pour être utilisé en production

  Google vient d'annoncer que son langage open source Go était disponible en version 1.0n ce qui marque une importante étape dans l'évolution de ce langage. Rappelons que Go est un langage compilé permettant de simplifier le développement d'applications concurrentes. Il est destiné notamment à la programmation système. Le passage de Go à version 1.0 suppose que le langage soit prêt pour être utilisé en environnement de production et que tout programme créé avec cette version puisse être compilé et exécuté sans modification de code avec les versions suivantes. Toutes les applications s'appuyant sur les versions précédentes doivent être exécutées avec un programme GoFix qui corrigera les problèmes de compatibilité. Avec cette ...

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• Juju instances in aganet-state: down after turning them off (and back on) on EC2

  - by Tyler McAdams

  I turned my Juju instances off on EC2 for a while and after bringing them back online they seem to be in an odd state: [code] claude-vm@claude-vm-fusion:~/Documents/Shell Scripts$ juju status 2012-11-17 17:06:44,094 INFO Connecting to environment... 2012-11-17 17:06:45,590 INFO Connected to environment. machines: 0: agent-state: not-started dns-name: ec2-54-242-142-196.compute-1.amazonaws.com instance-id: i-b0996fcf instance-state: running 1: agent-state: down dns-name: ec2-50-19-186-245.compute-1.amazonaws.com instance-id: i-8c8375f3 instance-state: running 2: agent-state: down dns-name: ec2-54-242-255-238.compute-1.amazonaws.com instance-id: i-56807629 instance-state: running services: wordpress: charm: cs:precise/wordpress-9 exposed: true relations: db: - wordpress-db loadbalancer: - wordpress units: wordpress/0: agent-state: down machine: 2 open-ports: - 80/tcp public-address: ec2-54-242-227-57.compute-1.amazonaws.com wordpress-db: charm: cs:precise/mysql-10 relations: db: - wordpress units: wordpress-db/0: agent-state: down machine: 1 public-address: ec2-54-242-212-177.compute-1.amazonaws.com 2012-11-17 17:06:47,274 INFO 'status' command finished successfully [/code] Can I not take my instances down for a while? Or is this something else?

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• Google Earth-Unsupported graphics card

  - by VIPaul

  I've just installed Google Earth on my PC,which runs Ubuntu 12.04 LTS. When I open Google Earth,a window pop-ups and says:"Unsupported Graphics Card Your graphics card does nor meet the minimum spec required to run Google Earth,which is a 3D accelerated card with shader support.It is strongly recommended that you try running Google Earth on a different machine or in a different rendering mode or upgrade to a newer graphics card.You may continue,but the application is unlikely to work." Maybe you'll say:"Buy a better graphics card!",but I used Google Earth on this machine an year ago,when I had Windows 7 & everything worked well,so my graphics card is good enough. The Linux version has bigger requirements than the Windows one or what???

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• .NET DAL and arhitecture

  - by Parhs

  I have seen lots of articles but none really help me. That is because I want to use dapper as a DAL. Should I create repositories with special functions? Like getStaffActive()? If I use repositories I can implement with dapper-extension a generic crud I have no idea how to handle database connection. Where to open the connection? If I do this at every function then how am I supposed to use transaction scope? Somehow the repositories I work with should share a connection in order transaction to work. But how to do this? Openning connection in BLL? If I use queries and execute them directly then still the same thing.

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• Launcher disappears when Focuswriter is minimized

  - by Andreas

  This bug has to do with the integration of the full-screen writing app Focuswriter within Unity. It appeared before I upgraded from Ubuntu 12.04 to 12.10 - probably caused by a an automatically upgraded change that persist in 12.10: When I minimize Focuswriter after it has been in full-screen mode the launcher is invisible - instead of seeing it I just see a rectangle the color of my desktop background where it should have been. The launcher becomes visible if I click the area once but then I'm likely to hit an icon and unwillingly open a program. I've reported the bug to the developer of the program here: https://github.com/gottcode/focuswriter/issues/101 He has labeled the bug "upstream" saying that the bug is can only be fixed in Unity. My questions are: 1) does anyone (perhaps experiencing problems with other full-screen programs) have a solution or workaround so the launcher won't disappear? 2) where can I file a bug report for this problem?

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• automount smb share customization

  - by Douda

  as a new linux user, used Ubuntu 12.10, I tried several tweaks with the SMB shares. I followed this tutorial to mount permanently 4 SMB shares from my local NAS. To resume, I : edit /etc/fstab added a line like : //servername/sharename /media/windowsshare cifs credentials=/home/ubuntuusername/.smbcredentials,iocharset=utf8,file_mode=0777,dir_mode=0777 0 0 created a credentials file for security reasons in my home folder (explained in the tutorial) ~/.smbcredentials It work perfectly, they are automounted on each reboot, but when I logon, I all the time get 4 file explorer open with each share. It is possible to avoid these file explorer window to be opened on every reboot ? I guess it's related to X or via a explicit deny or these graphical mount, but I don't have any clues on how to proceed Thank you for your time,

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• What to choose for beginner: PHP/Python/Ruby

  - by Nai

  I'm a beginner teaching myself to code but I would like he insight of the PSE community and helping choose where to start. My main objective is to be able to create a basic website to first test my business idea and from there iterate on it quickly to minimise my learning time. The most important criteria for me is speed. An example of speed would be pre-built components available open source and not having to write one from scratch. From my research, this seems to be a death match between the following languages and frameworks: PHP and CakePHP Python and Django Ruby and Rails Assumptions: I am going to be equally good (or bad) in all 3. It is going to be equally easy to find competent developers in either language. I know this to be false already by lets assume that it is. This question is not meant to karma whore as I've seen how passionate some of these standoff questions have been and I'll be happy to turn it into a community wiki.

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• Sync ERROR!! LOST MY WORK!

  - by Pedro Pisandelli

  Sorry my English... hope you understand me... I had a document. Edited it yesterday. But today, when i open it, it was desync. It show an one month earlier version!! I LOST A LOT OF WORK!! And i can't recover my right version of the document! I have a paid plan for Ubuntu One, but this made me very angry. And i don't see a way to recover and don't see a way to talk to somebody! There's no recovery mode like Dropbox... Man, i'm really ANGRY!! REALLY! I'll not recomend Ubuntu One services anymore! I don't know what to do... I lost my work and now i'm one month late! Thanks!!!

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• Clicking on active apps on unity launcher stopped working

  - by Tim

  I don't know how it suddenly became this but here's what's happening right now: e.g. I have 2 firefox windows open, so I see 2 small arrows on the left side icon of the unity launcher. Before, when I click on the firefox icon, I see 2 small windows of the firefox so I can choose which one. Now it suddenly stopped working. (super+W still works though). The bug on my system applies to all progams with multiple window instances like nautilus, terminal, etc. Please help, I don't know what to do. I also have cairo dock, compiz, myunity installed in my 12.04. I tried searching online to no avail.

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• The Return of Oracle Wikis: Bigger and Better

  - by oracletechnet

  The Oracle Wikis are back - this time, with Oracle SSO on top and powered by Atlassian's Confluence technology. These wikis offer quite a bit more functionality than the old platform. For example, wikis are now associated with groups/spaces, as opposed to an open free-for-all, and space owners have curative responsibility (for approving new members, moderating comments, and so on). All in all we're confident that you will be pleased with the experience. Of course, we'll be on the hunt for bugs/issues for a while, and if you find any yourself we encourage you to report them here.

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• Netbeans IDE did work after installation, but doesn't start after restart.

  - by ubuntumazze

  i installed Netbeans on Ubuntu 11.10 following these instructions: http://pasindudps.blogspot.com/2011/10/installing-netbeans-ide-in-ubuntu-1110.html. It worked perfectly fine (creating projects, open projects, compile, run...) but after restarting netbeans started normally and it is shown as a running application in unity-panel but I can't access the programm. I uninstalled and reinstalled it, it worked once but failed after restart. Has anyone an idea what might be the problem here? Thanks in advance. Regards

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• Ubuntu 12.10 Help! Everything is incredibly slow

  - by Keith

  I installed 12.10 from usb onto this machine. Intel celeron 2.00 GHz 496MB RAM I had to modify GNU-Grub to read "nomodeset" or i could not see the GUI. I have an Nvidia graphics card. Takes about 2 minutes to boot. The icons on the left of desktop take about 1 min to slowly open their menu. Have a network connection but mozilla is 404 and i cannot update. Where can i find a blow by blow explanation for troubleshooting and repairing this problem?

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• How important is the unit test in the software development?

  - by Lo Wai Lun

  We are doing software testing by testing a lot if I/O cases, so developers and system analysts can open reviews and test for their committed code within a given time period (e.g. 1 week). But when it come across with extracting information from a database, how to consider the cases and the corresponding methodology to start with? Although that is more likely to be a case studies because the unit-testing depends on the project we have involved which is too specific and particular most of the time. What is the general overview of the steps and precautions for unit-testing?

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• How do you change your screen's color temperature in Ubuntu?

  - by RPG Master

  I edit my photos on my laptop (yes, I know they have crap displays) and I recently had to replace the screen because the old one just randomly died. The old one had decent color reproduction by default, but this new one is VERY blue. After playing with the Gamma I've gotten it to be a bit better, but it's still pretty blue. So, my question is, how do I go about changing my laptop's display's color temperature? And I don't mean through something like the Red, Green, Blue sliders in the NVIDIA config menu. I'm talking about like adjusting in degrees, like editing a photo's white balance. EDIT: So now I've found Redshift and it's doing me pretty good. I thought it might be helpful if I out here the command I'm using. redshift -t 5000:5000 -g .5 By adding this to my start up commands I should be good. I'm still open to other suggestions, because I'd like something that actually edited my xorg.conf or something like that.

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• How to edit files in a terminal with vim?

  - by andrew.46

  It is not always possible to edit and create files in a terminal and I would like to get the answers to the basics of manipulating files in a terminal using vim under Ubuntu Linux. Specific questions I have are: How can I open text files for editing? How can I save the file? How can I save the file with a different name? How can I leave the file without saving the changes? What settings are best in my configuration file and where is this file? How do I set the colors for vim? How do I show line numbers in vim and can this be toggled? A lot of questions here but I believe these questions and their answers should cover basic vim usage...

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• New Java Tutorials Updated

  - by hinkmond

  The new Java Tutorials are here! The new Java Tutorials are here! So what? So, you can read them on your iPad thingie--if that's how you roll, that is... See: Read New Java Tutorials Here's a quote: What's New The Java Tutorials are continuously updated to keep up with changes to the Java Platform and to incorporate feedback from our readers. Recent updates include the following features: The Generics lesson has been completely reworked... The Java Tutorials are now available in two ebook formats: mobi ebook files for Kindle. ePub ebook files for iPad, Nook, and other eReaders that support the ePub format. Just kick back, open up your favorite tablet or eReader and learn all about the new things in the Java platform. Nice. All you need now is a cool drink and you're all set! Hinkmond

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• How to avoid “The web server process that was being debugged has been terminated by IIS”

  - by ybbest

  Problem: When debugging asp.net by attaching w3wp.exe process, you often will see encounter the following error message, the web server process that was being debugged has been terminated by IIS. Analysis: This caused Internet Information Services (IIS) to assume that the worker process had stopped responding. Therefore, IIS terminated the worker process. Solution: 1. Open IIS manager. 2.Click application Pools>>select the application pool associated with the site>>and click Advanced Settings 3. Click Advanced Settings of the application pool and set the Ping Enabled property from True to False. Now, reattach the process from Visual Studio, you should not get the error message. References: msdn

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• /var/lib/dpkg/lock.....help!

  - by Pycnopodia

  I had to reinstall the entire OS a little while ago and I have been trying to reinstall all of the programs I had before but I got a bit a of a problem now. I was trying to download dropbox from synaptic but it cannot finish the process and as a result I cannot update anything anymore. The line that comes out is: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? I have tried: sudo apt-get install -f sudo apt-get -f install sudo rm /var/lib/dpkg/lock sudo apt-get -f update sudo dpkg --clear-selections sudo dpkg --configure -a But nothing seems to work. So is there a way to solve this?? Thanks

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