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• How do I recover when Compiz crashes?

  - by winchendonsprings

  Often compiz will crash and leave the keyboard useless. Normally I drop to the console and restart GDM. Is there a solution where I can start Compiz back up without losing everything in the current session? compiz --replace & That's how I usually restart Compiz when it crashes and I can still use the keyboard. (If you have a tip on how to prevent Compiz from crashing I've posted here Fresh install of 11.04x64 - display(compiz) constantly failing ??? - Am I right that Compiz is failing or is it X?

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• Do you prefer building your interfaces in IB or programmatically? and why?

  - by LolaRun

  I've been using Xcode and building iPhone apps for two months, but I'm finding it really hard to grasp good application design. I always face problems—like you can't put your tabbarcontroller in another custom viewcontroller, for example—that 'sometimes', of course, would work if you did the creation of the views/viewcontrollers programmatically. So I don't know if I should start writing the creation of my objects or use Interface Builder. What are your experiences?

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• How should game objects be aware of each other?

  - by Jefffrey

  I find it hard to find a way to organize game objects so that they are polymorphic but at the same time not polymorphic. Here's an example: assuming that we want all our objects to update() and draw(). In order to do that we need to define a base class GameObject which have those two virtual pure methods and let polymorphism kicks in: class World { private: std::vector<GameObject*> objects; public: // ... update() { for (auto& o : objects) o->update(); for (auto& o : objects) o->draw(window); } }; The update method is supposed to take care of whatever state the specific class object needs to update. The fact is that each objects needs to know about the world around them. For example: A mine needs to know if someone is colliding with it A soldier should know if another team's soldier is in proximity A zombie should know where the closest brain, within a radius, is For passive interactions (like the first one) I was thinking that the collision detection could delegate what to do in specific cases of collisions to the object itself with a on_collide(GameObject*). Most of the the other informations (like the other two examples) could just be queried by the game world passed to the update method. Now the world does not distinguish objects based on their type (it stores all object in a single polymorphic container), so what in fact it will return with an ideal world.entities_in(center, radius) is a container of GameObject*. But of course the soldier does not want to attack other soldiers from his team and a zombie doesn't case about other zombies. So we need to distinguish the behavior. A solution could be the following: void TeamASoldier::update(const World& world) { auto list = world.entities_in(position, eye_sight); for (const auto& e : list) if (auto enemy = dynamic_cast<TeamBSoldier*>(e)) // shoot towards enemy } void Zombie::update(const World& world) { auto list = world.entities_in(position, eye_sight); for (const auto& e : list) if (auto enemy = dynamic_cast<Human*>(e)) // go and eat brain } but of course the number of dynamic_cast<> per frame could be horribly high, and we all know how slow dynamic_cast can be. The same problem also applies to the on_collide(GameObject*) delegate that we discussed earlier. So what it the ideal way to organize the code so that objects can be aware of other objects and be able to ignore them or take actions based on their type?

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• Where Can You Find OpenWorld 2013 Presentations?

  - by Steven Chan (Oracle Development)

  Presentations for OpenWorld 2013 sessions are available for approximately six months (until ~March 2014).  You should download presentation materials now, while they're still available: OpenWorld 2013 Course Catalog If a search engine brought you here:  this blog is maintained by E-Business Suite Development, not the OpenWorld team. Questions about OpenWorld content can be directed to the OpenWorld team here. Related Articles E-Business Suite Technology Sessions at OpenWorld 2013

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• Handling Constraint Violations and Errors in SQL Server

  The database developer can, of course, throw all errors back to the application developer to deal with, but this is neither kind nor necessary. How errors are dealt with is dependent on the application, but the process itself isn't entirely obvious. Compress live data by 73% Red Gate's SQL Storage Compress reduces the size of live SQL Server databases, saving you disk space and storage costs. Learn more.

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• An SEO Service Provider is a Must For Content Creation

  Anyone who plans on making any search engine optimizing (SEO) changes to their website should consider hiring an Internet marketing company who will know precisely how to create keywords that will attract a lot of traffic to your website. This will, in turn, increase your sales. Of course, you will need to be happy with these keywords before the person whom you hire will create highly effective, original, and unique content for your website.

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• Installed nvidia graphics driver (current, 8800GTX) has issues, how do I disable/uninstall it?

  - by Craig

  I installed the restricted nvidia graphics driver (current) on my computer, then restarted to finish the install. Upon reboot I got some prompt about there being an X server problem, It told me to try auto-fixing or something, none of its options worked, they all failed horribly and caused the computer to crash immediately on selecting any of them. I decided to re-install. Again I got in, downloaded updates, and installed the driver. This time upon boot the X-server immediately crashes and im brought to tty1. If I hit ctrl+alt+F7 I see a beige-background prompt says the usual about checking battery state, pulse audio etc., you see right before the x-server starts. According to X (if I do sudo startx) there are no displays, and the nvidia graphics driver is not working. First off, how do I set ubuntu back to the default driver (I have only a CLI right now -.-), then how do I install a more appropriate nvidia driver

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• Quantal upgrade broke my gnome-shell!

  - by hwjp

  Just updated to quantal 12.10, and Unity works fine, but and I can't get gnome-shell to work :( Some symptoms: when using gdm as the default, it decided to display everything in chinese. When attempting to log in, it accepts the password, and then seems to crash when trying to load my desktop, and seems to restart gdm and send me back to the login screen when switching to lightdm as the window manager, it gets a little further (and in english), bringing up a desktop, but a broken one -- the propeller key doesn't bring up a menu, there's no menubar or notifactions area. i can do a few things, like bring up a terminal with ctrl+alt+t, and launch eg firefox from there, but not much else. I have tried uninstalling gnome-shell, deleting /etc/gdm, and reinstalling Any other suggestions? Which log files to look at for example?

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• Eager to Learn more about MySQL?(Week 40)

  - by rituchhibber

  Are you a SQL programmer eager to know more?Oracle University is pleased to announce the availability of a new course in Training on Demand format : MySQL Performance Tuning.Why wait to get the training you need? Learn Oracle from Oracle today. Check out the demo to see how it works.Take a look at the new Training on Demand  MySQL Certification Packages.Please note: your OPN discount is applied to the standard price shown on the website.For more information, assistance and bookings contact your local Oracle University Service Desk.

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• 5 years of university education vs. 5 years of work experience - Which would you pick if hiring? [closed]

  - by gablin

  Say you need to hire a programmer. You have two candidates at your table: one has studied 5 years at uni (and holds a Master's degree, of course), but has no work experience; and the other holds no university degree but has worked for 5 years. Also assume that they both know the same programming languages, have about the same personality and spend equal amount of time programming on their spare time. If you only had this information to go on, which would you pick?

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• How do I debug a cluster running Microsoft server 2003?

  - by alcor

  I'm sole developer of a complex critical software system, written in Visual C++ 2005. It's deployed on a classical Microsoft cluster scenario (active/passive), that has Windows Server 2003 R2. If a server A goes down, the other one (B) starts and take the ownership of its duties. You have to know that: Both servers have the same Microsoft patches/fixes, same hardware, same everything. Both servers use the same memory storage (a RAID-6 through fiber channel). This software has a main module that launches the peripheral modules. if a peripheral module crashes, the main module restarts it. When I switch the application in one of the two servers (let's say the B server) two of the peripheral modules of the main applications just started to crash apparently without reason about 2 seconds after the start of the peripheral module. What could I do to analyze/inspect/resolve this weird situation?

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• How to make a jar file run on startup & and when you log out?

  - by RanZilber

  I have no idea where to start looking. I've been reading about daemons and didn't understand the concept. More details : I've been writing a crawler which never stops and crawlers over RSS in the internet. The crawler has been written in java - therefore its a jar right now. I'm an administrator on a machine that has Ubuntu 11.04 . There is some chances for the machine to crash , so I'd like the crawler to run every time you startup the machine. Furthermore, I'd like it to keep running even when i logged out. I'm not sure this is possible, but most of the time I'm logged out, and I still want to it crawl. Any ideas? Can someone point me in the right direction? Just looking for the simplest solution.

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• Which is the SEO Software For Me?

  Buying SEO software is not as quick and easy as it sounds. There are a lot of software packages out there that claim to make millions for you in just a few days- for a price, of course. But before handing over that money, there are few things you should know about SEO.

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• Mozilla sort un SDK pour JetPack, la révolution est en marche dans le développement des extensions d

  Mozilla sort un SDK pour JetPack La révolution dans le développement des extensions de Firefox est en marche La Fondation Mozilla est consciente que l'arrivée de Chrome et de ses extensions - visiblement plus simples à créer - représente un danger pour sa communauté de développeurs. Elle n'a certes pas lancé le projet pour cela, mais JetPack devrait cependant l'aider à rester dans la course et à conserver son attrait. Pour mémoire JetPack est un pr...

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• SEO Tips - Never Use an Automated Service For Search Engine Site Submission

  It's hard to visit a marketing related website without some company offering to submit your site to the search engines. Of course what many people don't realize is that you're not going to get into the SE's using these 'site submission tools' the only way to get into the search engine is for them to index your site after finding a link for your blog or website from a site that is in Google's or any other search engines results already. The bottom line is you should never pay for or use an automated search engine submission service.

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• What are the essential qualities to be a Java programmer? [closed]

  - by Rand Mate

  I just learnt a crash course from an institute for Core and Advanced Core Concepts in Java. I asked them what are all the algorithms, I need to know? They said: In Java there are more methods, you don't need to code more as in C/C++. After finishing core concepts in Java, I just passed on with more method usages from pre-defined classes in packages. So what's the next part I have to do, if the above mentioned is perfectly true (or) false based on the current expectations of IT Java programmers market? FYI: I'm fundamentally from the Electronics background, so please do excuse my ignorance.

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• Understanding Search Engine Optimization Cost and Creating Free One Way Links

  Knowing about search engine optimization cost, whether it is free or a bit pricey, can help you to get started creating the best one-way links that you can. Free one way links are important search engine boosters that will get your site a decent rank. Of course, you can always buy one way links but getting them for free is always better. Besides getting it for free, creating these links is easy. You only need to know the basics of link building and you're off!

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• October patch links

  - by THE

  Along the lines of patching... While it is not 100% in our LOB, it might still be interesting for some of our readers: The Oracle critical patch update Advisory for October 2012 You will find a very detailed List with links to patches and matrices on that overview page for products ranging from Database via E-Business Suite to MySQL. Of course you can find patches for Identity Management, SOA and Weblogic also via the "Master Note on Fusion Middleware Proactive Patching - Patch Set Updates (PSUs) and Bundle Patches (BPs) [ID 1494151.1]"

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• Is the structure of my site's navigation (via price/service tables) considered 'Duplicate Content' by Google?

  - by James Gadsby

  As I'm building my business website, I'm using service/price tables at the bottom of each service page to demonstrate to customers/potential clients my other offerings. Of course, given that there are 7 or 8 service pages, each with (according to Google) the same service descriptions below the original content for that service, would this be counting as duplicate content? If so, what could I do about it?

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• How to Create a Website From Scratch and How to Promote It

  Many people think that they can just make a website upload it to their server and people will visit, this of course is not correct, it is the main reason people fail at making an income online just taking the time to fully research your market can be the difference between success and failure. Choosing your niche and researching your keywords takes time and if done wrong it will be a sure way to failure it is the most important part of building your web site and should be done before buying your domain name and web space, search...

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• Linux Users Speak...Devs Open Source Their Games

  <b>Blog of Helios:</b> "Nils Grotnes emailed me about 20 minutes ago with some pretty cool news. Aquaria by Bit Blot ,Gish Published by Chronic Logic, Lugaru HD by Wolfire, and Penumbra Overture of course by Frictional Games have pledged to go open source."

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• Compiz features stopped working when an external monitor is attached

  - by adjfac

  Running 12.04 on a thinkpad T520 with nVidia NVIDIA Quadro NVS 4200M graphics. Just updated to the lasted nvidia 310 driver. Everything works great. However, as soon as I attached an external monitor using nvidia twinview, compiz features such as scale (moves all the active windows in one page) stopped working, as well as alt-tab to list all opened programs. Any ideas how i can fix this? never had this problem with 11.04. I can post my xorg.conf if that's of use to you. Thanks much! edit 1: I am using gnome3 classic edit 2: alt-tab works -- compiz application switcher (by default for gnome3 / unity) will crash gnome-classic, by changing to "static application switcher" in compiz seemed to solve the problem, but the scale still does not work when an external monitor is attached.

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• Using the Same Domain to Bury Bad Publicity

  Receiving bad publicity can be a devastating blow to a brand's online reputation, and in order to mitigate the damage often the best course of action is to try to create enough alternate content to push the negative publicity down to the second, third, or even deeper, search result pages. Most people do this by creating a number of different pages on new or alternate domains, but in fact it can be much more effective to try to create pages on the same domain.

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• Is possible to create an intranet site in Ruby on Rails? [closed]

  - by Akromyk

  I'm just coming out of a .Net course and I'm wondering whether it is possible to create an intranet site using Ruby on Rails, and if so, would it even be a good idea. I plan on creating a web site for a vendor that hopes to open up a physical location and it would be beneficial for us to go with a technology that could tie their web front into their intranet for helping them manage orders and logins, but at the same time still have a low cost.

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• I need advice on how to debug a cluster

  - by alcor

  I'm the only developer of a complex critical software system, written in Visual C++ 2005. It's deployed on a classical Microsoft cluster scenario (active/passive), that has Windows Server 2003 R2. If a server A goes down, the other one (B) starts and take the ownership of its duties. You have to know that: both servers have the same Microsoft patches/fixes, same hardware, same everything. both servers use the same memory storage (a RAID-6 through fiber channel). this software has a main module who launch the peripheral modules. if a peripheral module crashes, the main module restarts it. When I switch the application in one of the two servers (let's say the B server) two of the peripheral modules of the main applications just started to crash apparently without reason about 2 seconds after the start of the peripheral module. What could I do to analyze/inspect/resolve this weird situation?

  Read the article

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