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• How can I customize an icon on the dash/launcher?

  - by user26272

  all. I have a question that has been bugging me recently.. Say I install Blender.. I am using the Bumblebee project thing, so in order to properly use it, I have to go to the terminal and type "optirun blender". If I just click on the icon on the dash, it will run without the proper parameter being passed. Is there a way I could customize the Blender launcher on the dash so it would always launch it with the optirun parameter? Thanks.

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• Work with 64-bit VM in Windows 7

  I attended a Microsoft Office and SharePoint 2010 HOL 1 day workshop last week and wanted to setup a VM to try the new features in my own laptop. The presenter in the workshop implicitly mentioned a tool called VirtualBox (because it's not a MS product?) but I have no clue what it is at that moment. Until today, I saw a very useful blog and thanks to Guy and Rolly. I know what to do next in order to setup the VM in my Windows 7 safely now. :)...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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• upgrading libglu1-mesa to its latest version

  - by Abderrahmane TAHRI JOUTI

  Yesterday I needed to install freeglut3, and ubuntu was saying that it needed libglu1-mesa=8.0.4-0ubuntu0.2 while 8.1~git1206081121.640409~gd~p was to be installed. So in order I did apt-get install --reinstall libglu1-mesa=8.0.4-0ubuntu0.2 and freeglut3 finally got installed. when I started ubuntu today, It got me onto Unity 2D. I got from that that what I did yesterday was not wise. Now compiz cannot start properly I suppose. I don't know if it is going to work, but if I install the version I had yesterday will it switch automatically ? Also, I do not know how to do it, installing the latest version of libglu1-mesa

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• Figuring out what object is closer to a certain point?

  - by user1157885

  I'm trying to create fog of war, I have the visual effect created but I'm not sure how to deal with the hiding of other players if they're within the fog of war. So right now the thing I'm trying to do is if another player is hiding behind a wall then not to render that player. I was thinking of doing it by sending a ray in the direction of all the players, and then creating a list of all the obstacles that ray collides with and then trying to figure out if an obstacle was closer than the player in order to predict the distance. But then I realized I'm not really sure how to figure out if the obstacle is infact closer or not because I have to account for all the dimensions, so I'm kind of stuck. First of all is this approach the correct way to go about it and secondly how would I calculate if the obstacle was infact closer taking into account the X Y and Z. Thanks

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• How to safely and painlessly switch from Kubuntu to Lubuntu?

  - by cdshines

  I've had Kubuntu installed for several years, updating from one major release to another, and now I think I'd like to try to switch to Lubuntu. But since my distribution is already tuned and shaped to satisfy my needs, I'd like not to get a fresh installation, but just purge kubuntu-desktop and install lubuntu-desktop. But when I execute sudo apt-get install lubuntu-desktop, it gives me an error of the following essence: The following packages have unmet dependencies: lubuntu-desktop : Depends: usb-modeswitch but it is not going to be installed E: Unable to correct problems, you have held broken packages. So, I investigate the modeswitch problem and get The following packages have unmet dependencies: usb-modeswitch : Depends: usb-modeswitch-data (>= 20110227-1~) but it is not going to be installed E: Unable to correct problems, you have held broken packages. But: Reading state information... Done usb-modeswitch-data is already the newest version. So, my question is: what actions should I take in order to obtain a clean and fresh installation of Lubuntu? And also, how do I safely remove all the kubuntu-desktop-related stuff?

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• Programming Entity Framework, 2nd Edition (EF4) Table of Contents

  We are closing in on finalizing the 2nd edition of Programming Entity Framework! Although the rough draft chapters are already available through Safari’s Rough Cuts program (here: http://oreilly.com/catalog/9780596807252) I have been editing and reshaping the content since those chapters were published. You can get the final print edition (August 15th or perhaps a bit earlier) at O’Reilly or pre-order it here on Amazon.com (here) (and elsewhere of course!) I believe that the book will...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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• Need to setup and access web disk for a hosting account

  - by mtk

  I am on linux(ubuntu 12.04) and have purchased a hosting space. In the cpanel, I selected nautilus for accessing web-disk and I was given a note: Note: In order for the Web Disk to work, you will need to allow port 2078 (SSL) or 2077 (non-SSL) on your computer's firewall. As, I am unable to connect to this, i.e. on entering the given url in Nautilus address bar, it says 'Connection closed'. So, I believe the above this quoted is not correctly configured. Please let me know, how to configure this? How to allow the given port access?

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• How to get the Time Difference in C# .net

  - by Aamir Hasan

  A DateTime instance stores both date and time information. The DateTime class can be found in the System namespace.In order to retrieve the current system time, we can use the static property Now of the DateTime class.In this Example i have shown, how to calculate the difference between two DateTime objects using C# syntax. DateTime startTime; DateTime endTime;            startTime = Convert.ToDateTime("12:12 AM");            endTime = Convert.ToDateTime("1:12 AM");            var timeDifference = new TimeSpan(endTime.Ticks - startTime.Ticks);Response.Write("Time difference in hours is " + timeDifference.Hours);Link:http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx

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• What is the name of this array transformation?

  - by Brandon Tilley

  Start with an array of arrays; in this case, they are different lengths in order to demonstrate the technique, but they do not have to be. [[1,2,3,4], [5,6,7], [8,9,10], [11,12,13,14,15]] At the other end of the transformation, you have an array of arrays where the first array contains the first element from each of the original arrays, the second array contains the second element from each of the original arrays, and so on. [[1,5,8,11], [2,6,9,12], [3,7,10,13], [4,14], [15]] Is there a mathematical or CS term for this operation?

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• Sysprep a BizTalk Server VHD

  - by AbhishekLohani

  Hi All,   Sysprep creates a snapshot of a virtual machine with BizTalk Server 2010 installed for quick deployment on other virtual machines   Prerequisites Before using Sysprep, you should have some knowledge of using virtual machines with Hyper-V. You should also have a virtual machine with a clean, typical installation of BizTalk Server and all of its prerequisites. Sysprep will run on Windows Server 2008 and Windows Vista with SP1. Description Sysprep creates a VHD of a BizTalk Server 2010 installation (including the operating system and all prerequisites) for quick deployment on other virtual machines. An image created using Sysprep will choose a new computer name in order to join the domain the first time it starts. To get BizTalk Server running properly, it is necessary to update various instances of the computer name that are stored in the registry and databases. Please refer the Microsoft Links for Details :http://technet.microsoft.com/en-us/library/ee358636.aspx   Thanks Abhishek

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• How to add UTF-8 support to my hard disk in fstab?

  - by punkmexic

  I use Ubuntu (Spanish language). Sometimes I get this error when I use special characters (codification error) so I read that if I edit a file of my hard disk by using gedit /etc/fstab and adding utf8 I can fix it.... I had this line: UUID=bfb5b95e-bf68-464a-8abf-d6027b039fa4 / ext4 errors=remount-ro 0 1 I adeed utf8 like this: UUID=bfb5b95e-bf68-464a-8abf-d6027b039fa4 / ext4 errors=remount-ro,iocharset=utf8 0 1 But I messed my Ubuntu and I can't log in now to my Ubuntu so im using live session... so I'll have to remove that code in order to be able to use my Ubuntu again. Can someone tell me how that line should look like?

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• Different behavior when launched from terminal instead of Unity launcher

  - by dgkontopoulos

  I have written two Perl/Gtk programs. When launched from the dash menu, they run just fine. However, if I try to launch them from terminal using the very same command found in their .desktop files, their Unity launcher will be blurry and will remain inactive when clicked, if I keep it in the Unity bar. The problem is solved if the Exec part of the desktop file is replaced with perl path_to_script However, that leads to other problems, including a lintian warning and forcing all Perl GUI applications running from terminal to adopt the same launcher. This issue is quite annoying since one of the programs relies on a different (Python) program in order to be launched and this results in having a blurry and inactive launcher.

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• Shouldn't all source code be plain text? [on hold]

  - by user61852

  Some developing environment/languages save the source code you write in a binary/propietary format that you cannot see or edit with a generic text editor. I'm not talking about compiled code, but the source code. An example could be PowerBuilder and Oracle Forms. It's ok you use proprietary technology if you want, but not being able to open the source code you wrote, in a simple editor, if only to read it, seems like a very strict form of vendor lock-in. Also this prevents you from using text-based version controls that can show you the difference between two versions in a line-by-line base. If the code is plain text, you don't need a license in order to just open it, see it and learn from it. Should it be a golden rule to avoid vendor lock-in to avoid technologies that save your source code to anything but plain text files ?

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• FPS camera specification

  - by user1095108

  I remember I once composed a FPS viewing transformation, as a composition of 3 rotations, each with an angle as a parameter. The first angle specified the left/right rotation around the y-axis, the second angle the up/down rotation around the x-axis, and the third around the z-axis. The viewing transformation was therefore specified by 3 angles. Naturally, this transformation had a gimbal lock, depending in what order the transformation were performed. What should I look at to derive my viewing transformation without the gimbal lock? I know the "lookAt" method already, but I consider that cumbersome. EDIT: MY first guess is to do the first 2 transformations to get a viewing direction and then the axis-angle rotation on this axis.

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• How do I make the correct career decision in regards to product manager/QA vs programmer?

  - by Adel

  I'm curious about how to approach the issue of whether I should focus on programming or on QA/testing/product management. I know that the latter seems like a broad category( if so, think of it as "general IT support" for now). At the moment I'm stronger in QA/prod. mgt ; however I'd like to switch more to programming, and I see I may have this opportunity. Wouldn't it be easier to switch to QA/prod. mgt in the future, if I go into programming now; rather than trying the reverse-order(i.e. if I decided later to go into coding.. say around mid-30s then it'd likely be harder). Just looking for any advice or tips about how to see more clearly. Part of me is scared I can't handle the programming side, but part of me says since there's demand and I'm interested that it's still worth a shot.

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• Where do you get new software ideas from? [closed]

  - by Cape Cod Gunny

  The world of software creation is very competitive. I've heard it said to be successful you need to be the first one with the idea. Everyone knows how Bill Gates created IBM DOS on one machine while simultaneously building MS-DOS on another machine (and we all know how that turned out). In order to be the first to come up with a new software product, where do you go looking for fresh ideas? Update 06/26/13: Reworded this question in an attempt to get it reopened. Bill Gates developed MS-DOS at the same time he was hired to develop IBM DOS. As a programming community, we would all gain by understanding how to think up great ideas for software. As programmer we tend to get stuck in our thinking... it's refreshing to hear how fellow programmers busted out and came up with their ideas. It's not very likely that we will have an MS-DOS opportunity like Bill Gates. Please vote to reopen.

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• Is this fix for Avast Antivirus crashing safe to use?

  - by TmRn

  Well I have installed avast anti virus on Ubuntu 12.04. But after updating, it crashes! So I have made some tweaks like below: Press Ctrl+Alt+T to open the Terminal. When it opens, run the command below. sudo gedit /etc/init.d/rcS Type your password and hit Enter. When the text file opens, add the line: sysctl -w kernel.shmmax=128000000 Make sure the line you added is before: exec /etc/init.d/rc S This is what it should look like: #! /bin/sh # rcS # # Call all S??* scripts in /etc/rcS.d/ in numerical/alphabetical order # sysctl -w kernel.shmmax=128000000 exec /etc/init.d/rc S Save the file. Reboot. My question is: Did I do anything wrong? I mean as I have made some tweaks, will it lower the security of Avast down like viruses do? Please if you are a programmer check this if it contains bug or harmful intentions... Thanks.

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• How do I download a corrupted package again?

  - by user64720

  Ubuntu 12.04 can't install Firefox 13 update, because the package is corrupted. While attempting to install, returns this error (I translated it from my language to English). /var/cache/apt/archives/firefox_13.0+build1-0ubuntu0.12.04.1_i386.deb W: Waited for dpkg --assert-multi-arch but was not there - dpkgGo (10: There are no "child" processes). I can tell that the package at /var/cache/apt/archives/firefox_13.0+build1-0ubuntu0.12.04.1_i386.deb is corrupted, but even as admin, I can't delete it in order to be downloaded again. How should I proceed? EDIT: There was a single package causing this conflict, please report here to understand all the situation: Why can't I install from software center?

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• Mass Delete Using Gridview with Checkboxes

  This sample shows how to use a Gridview to delete multiple records all at once, having marked them with a Checkbox, and clicking one button, external to the Gridview, to delete them all As usual, here, we're using the Northwind Database. If you want to try this on your own Northwind database, adhere to this word of caution - "BACK IT UP FIRST". You will be making multiple deletes, so in order to get it back to the original state, you must make a backup and then restore afterwards. Remember too, that you will need to substitute your own Web.Config connectionstring entry for "YourNorthwindString" in the sample code

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• How can I use rhythm box and conky together?

  - by Ryuzaki

  I'm still fairly new at this and 12.04 LTS is my first hands on experience with Ubuntu all together. After spending a few weeks and trying to learn the in's and out's of the OS, I'm actually finding it easier to use in my off-time than Windows. However, my question today deals with the following: I need help in trying to pull information from Rhythm Box in order to display it using Conky. What I want is the following: » Album Title » Song Name » Artist » Album Picture Is there a way to pull these and display them so that they will change as the songs change? I tried my hardest but I'm still a noob when it comes to using terminal and coding.

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• Do you think that in the future it'll be possible to develop games on OS X by using Python and the latest library "Sprite kit" made by Apple? [on hold]

  - by Cesco

  I don't understand a lot about game engines and modules for Python, even though I'm aware of the existance of PyGame and Pyglets, so please don't bash me too hard if I'll wrote something wrong in this question :-) When I upgraded my Mac to the latest version of OS X, I noticed for the first time that Apple is providing a library named Sprite kit for developing games on both iOS and OS X. It looks to me fairly complete, and the fact is managed by a big company gives me the impression of being well-supported for the time being; in summary, it looks... cool. Actually in order to take advantage of "Sprite kit" you need to code in Obj-C. Since I don't know Obj-C but only a little bit of Python, do you think that there's a chance that sooner or later someone will make a wrapper for Python ? Thank you very much and best regards

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• Silverlight 4 + RIA Services: Ready for Business: Updating Data in the Client

  To continue our series, lets look at updating the data.  I have created a Plates.xaml page with very similar structure to the above.    For details on how I created this page, check out my PDC 09 demo walk through.    Now lets look at updating the Plate data.. First we will create some default form UI by dragging an entity from the datasources window in much the same way we did above.  But before we create the UI, notice the order of the fields it...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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• Why the Select is before the From in a SQL Query?

  - by Scorpi0

  This is something that bothered me a lot at school. 5 years ago, when I learned SQL, I always wondered why we specify first the fields we want and then where we want them from. According to my idea, we should write: From Employee e Select e.Name So why the norm says: Select e.Name -- Eeeeek, what e means ? From Employee e -- Ok, now I know what e is It took me weeks to understand SQL, and I know that a lot of that time was consumed by the wrong order of elements. It is like writing in C#: string name = employee.Name; var employee = this.GetEmployee(); So, I assume that it has a historical reason, anyone knows why?

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• Does anyone know of a simple (free?) feature request tracking system we could use internally for sales people?

  - by Ryan

  I sometimes hear about pain points of customers using our app from sales people, but there really isn't a good way for us to currently keep track of these. I was going to write one myself but figured I would ask first. I was thinking something so simple it would literally just be a small form for adding a new feature, and then it would appear in the list, like stackexchange questions. Then users can upvote them, or even record each time a user complains about something related to the request so we can order them in priority based on real data. Then I can easily go look every few days and see what's going on. That's really it, nothing more complicated than that. Know of anything?

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• looking for advice regarding a free shopping cart solution [on hold]

  - by thirdCharm

  I am building a very small e-commerce site, and I need a free and simple to use/deploy/integrate shopping cart that I can add into my website in order to be able to sell a FEW items. I want the shopping cart to be an add-on in my website, nothing fancy.Ideally when a person clicks on the "Add to cart" button, they will be redirected to the shopping cart, which will then handle different types of payment methods, and everything else you would expect from a fully working shopping cart. I am currently developing my website using the following tools/frameworks: SQL Server 2008 R2 Visual Studio 2010 (ASP.NET 4.5 - C#) HTML5,CSS3, and JS. I am interested in also using PayPal alongside my shopping cart. Help of any kind is appreciated!!

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