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• Shared memory multiprocesses

  - by poly

  I'm building an multi processes application and I need to save session ID, the sessions ID is 32 bit, and of course it can't be used twice in its lifetime, I'm currently using DB that saves all the ID in a table, and I do the following, ID table is (int key, char used(1)) //1 is used, 0 is not 1. lock table 2. get one key for one sessions 3. update used field in it to used 4. unlock After the session is finished the process use below to free key, 1. lock table 2. update used field in it to not used 4. unlock I'm really wondering whether this is a good/fast implementation. and please note it's multi processes application.

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• Is it a bad practice to have an interface to define constants?

  - by FabianB

  I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy access to constants: "MY_CONSTANT" instead of "ThatClass.MY_CONSTANT" each constant defined only once Is this approach rather a good or bad practice? I feel like abusing the concept of interfaces a little bit. You can answer generally about interfaces/constants, but also about unit tests if there is something special about it.

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• Two users sharing the same computer

  - by Pitto

  I need to share my pc with a friend of mine living in India. His pc is a p4 and he needs a bit of horsepower for calculation. Since I have an i5 I thought to let him vnc and use it but this would not allow me to use the computer at the same time. Is there a way to use the computer at the same time with different users? I've read Xorg is able to do this but I am not sure is the best solution nor I can implement it. We have Ubuntu 12.04 64bit on the i5 side and Ubuntu 12.04 32bit on the p4 side. Thank you for your kind help.

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• usb stop working

  - by miguel

  I'm using Xubuntu 12.04 on a 64 bit Intel core duo laptop and the 3 USB 3.0 ports stopped working if I do not use the mouse. I updated the kernel to 3.9 but the bug persists. I googled too much and the few reponses I got cannot fixed this. The only solution is shuting down, unplugging and then plugging them back, then all works fine. But after half an hour or two days the bug reappears. How can I solve this? Thanks and excuse my poor english.

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• And just like that, there went February

  - by Enrique Lima

  The best intentions were having me at perhaps posting more than twice a month, and here we are and … well it has been busy. There has been a lot of SharePoint 2010 already in this first number of weeks of the year, a good amount of TFS 2010, but even better working quite actively on two topics that I enjoy quite a bit … Windows Azure and Application Lifecycle Management.  And there is more to come around those two. Through the influencers program with Geekswithblogs and Discountasp.net I got access to a hosted TFS solution that I am currently testing and will be posting my findings and documenting a good amount of information on that process. Another great resource has been fpweb.net, and there will be more details on this too.  Pretty exciting stuff! That is what is going on and what will be coming on here shortly.

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• What Does It Usually Mean for a Feature to be "Supported"?

  - by joshin4colours

  I'm currently working some testing for a particular area of an application. I had to write some automated tests for a particular feature but due to the circumstances, this was not easy to do. When I asked one of the other testers about it, he mentioned that the same features exist in a sister application our company produces but isn't documented anywhere (end-user documentation or otherwise). He also said that the feature doesn't typically get tested at all in the sister application and isn't usually tested in the application I work on. Apparently this feature isn't heavily used but removing it would require a fair bit of work so the benefit-cost ratio doesn't work out. All of this has left me with some questions. Other than "The documentation says so" or "We told the client it is", what usually makes a feature "supported" versus an unsupported feature?

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• No sound/audio after resuming from sleep

  - by hansvonaachen

  I've made a fresh UEFI install of Ubuntu 13.10 (64 bit) on a Lenovo Ideapad Z510 laptop with Intel i5 4200M processor. Ubuntu is the only OS installed on the computer, secure boot disabled. Everythings works fine (backlight issue fixed after editing rc.local file), the only minor trouble I have is resuming the laptop from "sleep" mode. If I close the lid and then wake the laptop opening it again, there is no audio/sound. I need to restart the computer (not even logging out helps). If I suspend the computer in a graphical way (not closing the lid): gearwheel in top right of the screen -- suspend and wake it up/turning on, audio works with no issues. Ideas how to fix this? Thanks!

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• Silverlight 4 enables Authorization header modification

  A little bit of hidden gem in the Silverlight 4 release is the ability to modify the Authorization header in network calls. For most, the sheer ability to leverage network credentials in the networking stack will be enough. But there are times when you may be working with an API that requires something other than basic authentication, but uses the Authorization HTTP header. The Details Basically you just set the header value. Hows that for details :-). Seriously though, heres a snippet of code:...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Algorithm for Learning development

  - by user9057

  This is a fairly general question. I know a bit of Perl and Python and I am looking to learn programming in more depth so that once I get the hang of it I can start developing applications and then websites. I would like to know of an algorithm (sequence of steps :)) that could describe my approach towards learning programming in general. I have posted small questions on Perl/Python and I have recieved great help from everyone. Note:- I am not in a hurry to learn. I know it takes time and that's fine. Please give any suggestions you think are valid. Also, please don't push me to learn Lisp, Haskell etc - I am a beginner.

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• Thumbnail preview rotator on mouse-over - what is it called?

  - by Gerben

  I've been searching for hours now but can't get any tutorial on this. I have these thumbnails on my homepage which are the first images of their corresponding posts. What I want is that when I mouse-over a post on the homepage... the corresponding thumbnail should also show/rotate the other images of that particular post... bit like a sneak-peak image rotator... Does anyone know where I can get a tutorial regarding this? How's this called? It seems like I'm searching for the wrong keywords on google as I can't find anything.

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• How to choose a good namespace name? [Linguistically]

  - by Kees C. Bakker

  English in not my native language, therefore it is a little more difficult to pick a good name for a namespace. One example to make you see my problem a bit better: We have a set of classes that have to do with the way a company is organized (we can create organizational charts with it). Currently the namespace is CFW.CoreSystem.Organizational. Is this a good name? What is linguistically the best way to name a namespace? (CFW.CoreSystem.Configuration is better than CFW.CoreSystem.Configurables). [Moved it from StackOverflow]

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• Which libraries I need for projects in Mono Develop to work Properly?

  - by Curious Apprentice

  I want to test each and every project type available on mono. But due to some package dependencies Im unable to run any of "Hello World" project. I have less idea what libraries I need for what. Few days back I have installed gtk-sharp2 but still while running an VB.net Gtk# or C# Gtk# Im getting compilation errors that cli.Gtk does not exist. Is there a way through which I can solve all dependencies by one click ?! I atleast once want to try learning linux app programming. Without the proper tools it is not possible. Please help :) Mono Develop Version : 2.8.6.3 Ubuntu 12.04 32 Bit

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• How can you put all images from a game to 1 file?

  - by ThePlan

  I've just finished a basic RPG game written in C++ SFML, I've put a lot of effort into the game and I'd want to distribute it, however I've ran into a small issue. Problem is, I have well over 200 images and map files (they're .txt files which hold map codes) all in the same folder as the executable, when I look in the folder, it makes me want to cry a little bit seeing so many resources, I've never seen a game which shows you all the resources directly, instead I believe they pack the resources in a certain file. Well, that's what I'm trying to achieve: I'm hoping to pack all the images in 1 file (Maybe the .txt files as well) then being able to read from that file or easily add to it.

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• How can you monitor internet download usage?

  - by dv3500ea

  Some broadband providers impose a monthly download limit, charging extra if you go over. It is also quite easy to exceed some of the lower limits just by installing/updating packages and 'normal' browsing (which to me includes streaming TV programs and movies). This means that you need to limit the amount you use the internet, yet it is hard to know when. The System Monitor helps a bit with this by giving a total received/total sent in the networking section of the Resources tab. However, this is reset every reboot. It would be good if there was a way to have a monthly total received so you can know how close you are to exceeding your limit and maybe even be given warnings if it looks like you are going to exceed the limits. Does anyone know of a way to achieve this?

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• WiFi is painfully slow, sometimes stops altogether

  - by Zelda64fan

  Lately my WiFi connection has been quite slow, and sometimes I lose my internet connection altogether (but the computer does not actually disconnect from the WiFi network). This only affects my laptop and only when it's running Ubuntu, so I think it must be a problem with Ubuntu. I haven't changed anything recently; this is on 12.10 64-bit. What could it be? Update: It's doing this now. The connection isn't completely dead, it's just staying under 5 kB/s. Still frustrating though. It also seems to affect all users.

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• Is there a way to forward emails associated with a domain without a mail server?

  - by MeltingDog

  A client owns example1.com but wants to also purchase example2.com and have it point to their original site at example1.com. No problem there. But they also want any emails going to example2.com to be forwarded to their counter parts at example1.com Eg: if someone emails [email protected] it will be forwarded to [email protected] They only way I can think of doing this at the moment is to set up host for example2.com and then set up mail forwarders in cpanel. But this seems a bit excessive and costly. Does anyone know another, cheaper way of doing this?

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• Powermapper alternatives and google analytics?

  - by rugbert

  Whats a good application to map the hierarchical structure of a website and maybe get some google analytic action going on? Powermapper is pretty expensive and the trial version didnt seem particularly good at importing google analytics CSV files as advertised. In fact, out of the 1000 pages mapped, exactly 0 were successfully imported. I dont really need all the features Powermapper offers anyway, so the price tag is a bit much. All I really need is like, a simple visual representation of my (automatically generated) site structure (like a hierarchical site structure) and the ability to integrate my google analytic stats (page views mostly) with it.

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• Networking Icon Keeps Disappearing

  - by Zelda64fan

  Almost every time I unlock my computer the networking icon and the Bluetooth icons are missing from the panel. They also disappear if I disable networking with the 'hardware switch', even though before they would just switch to a 'disabled' look. I know I can get the networking one back by running nm-applet, but I'd rather just find a way to make it stop disappearing. What causes this? This is on 12.10 64-bit, if it matters. UPDATE: I ran it from terminal, and got this: $ nm-applet ** Message: applet now removed from the notification area ** Message: PID 31340 (we are 28924) sent signal 15, shutting down... And then it exited. So it thinks it's supposed to quit...? I haven't been able to figure out what process had that ID.

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• Ubuntu 11.10 USB 3.0 HDD

  - by Chazm

  I have a problem with my external HDD (WD My Book Essential 1TB) working on USB 3.0 port. I'm using dual boot setup with Windows 7 and Ubuntu 11.10, both 64 bit. While I'm running Windows and rebooting back to Windows everything works well. When I'm switchin to ubuntu everything works great as well. But after 1st reboot from ubuntu neither windows nor ubuntu mount the external drive. I have to reboot the device manually. I suspect that the problem is with unmounting the device on shutdown on ubuntu. The case concern only usb 3.0. When i plug the same device into usb 2 port the problem doesn't persist. Does any1 hit the same problem or have a clue what might goin wrong?

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• W520 External monitor setup with Ubuntu 12.10

  - by user108372

  I just installed a fresh Ubuntu 12.10 64-Bit Desktop on my Lenovo W520. It looks like there are a lot of challenges around making it work with out of the box Nouveau drivers or propriety Nvidia drivers or Intel GPU. I looked at couple of notes on how to make it work with Bumblebee with Optimus Nvidia. None of them seems to work for 12.10. Anybody has a solid answer on this? It seems like a lot of people are suffering from this. Here is my xrandr output. Let me know if you need any additional information. Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.0*+ 59.9 50.0 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) Thanks, Sef

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• How to properly code in Unity? [on hold]

  - by Vincent B.

  I'm fairly new to Unity (yet I touched it and made a few proto with it) and I'd like to know how I'm supposed to work with it. I'm student in programming so I'm used to C/C++ with SDL/SFML, writing code and only using Input/Graphics/Network libs. I followed a few Unity guides and it was way more around drag & drop on scenes and a bit of scripting to activate it all, which disturbed me. So I fond a way to only use one GameObject and use a Singleton to launch code and display stuff (for 2d games at least). At the end of the day I make games not using "Instantiate" or such at all. Is it the right way ? Am I supposed to do this ? How much are your scenes populated (in a professional environment) ? When should I stop coding and start using the editor ?

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• jQuery scrolling images for e-commerce site, what to do about users who disable JS

  - by Livingston Storm

  As the title suggests, I am developing an e-commerce site and I intend of having two jQuery plug ins on the default page, one for scrolling images and the other for the navigation menu. Should I be concerned about making the site work if the users disables JS? Cause if they have it disabled my site would be almost impossible to use with the scrolling images blocking the main content. Plus the CMS I am using, Big Commerce, uses a bit of JS for the products pages, which would also look ridiculous with JS disabled. Anyone have experience with this?

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• hypertext for research notes [closed]

  - by user967543

  I keep lots of notes as I work - code snippets, TODO lists, account details, links, comments. I currently use plain text files for this - very simple and robust but a bit last-century. I would like features similar to HTML - e.g. to embed pictures, formatting, and crucially hyperlinks within my notes. One particular use-case is an implementation of Getting Things Done - more or less, a collection of hierarchical TODO lists, which I'd implement with hyperlinks between tasks. Most WYSIWYG HTML editors seem to be aimed at web designers, creating beautiful pages for professional websites. Is there a simple tool / editor more appropriate for how I want to use it? (or advice from anyone doing the same)

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• HTG Explains: What are Shadow Copies and How Can I Use Them to Copy or Backup Locked Files?

  - by Jason Faulkner

  When trying to create simple file copy backups in Windows, a common problem is locked files which can trip up the operation. Whether the file is currently opened by the user or locked by the OS itself, certain files have to be completely unused in order to be copied. Thankfully, there is a simple solution: Shadow Copies. Using our simple tool, you can easily access shadow copies which allows access to point-in-time copies of the currently locked files as created by Windows Restore. Image credit: Best Backup Services How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It

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• error when installing rmagic gem on Ubuntu 12.04 for Ruby on Rails

  - by PeaceDefender

  0 down vote favorite I am trying to get my Ruby on Rails application working and installing RMagic gem. But I get an error that says "Can't install RMagick 2.13.1. Can't find the ImageMagick library or one of the dependent libraries." Altough I have ImageMagick installed with its dependences. Terminal log : http://pastebin.com/vcgkbwZR I even tried to installed RMagic from Synaptic, but I get the same error when I run "bundle" command. Through my search, some people had problem with lib dependencies, but I believed I have them all installed. Another solution I found is this ( error installing RMagick from gem ) a little bit old and not sure if it is going to work for 12.04. BUT, I don't know where those configurations should go.

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