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• How do you avoid jumping to a solution when under pressure? [closed]

  - by GlenPeterson

  When under a particularly strict programming deadline (like an hour), if I panic at all, my tendency is to jump into coding without a real plan and hope I figure it out as I go along. Given enough time, this can work, but in an interview it's been pretty unsuccessful, if not downright counter-productive. I'm not always comfortable sitting there thinking while the clock ticks away. Is there a checklist or are there techniques to recognize when you understand the problem well enough to start coding? Maybe don't touch the keyboard for the first 5-10 minutes of the problem? At what point do you give up and code a brute-force solution with the hope of reasoning out a better solution later? A related follow-up question might be, "How do you ensure that you are solving the right problem?" Or "When is it most productive to think and design more vs. code some experiments to and figure out the design later?" EDIT: One close vote already, but I'm not sure why. I wrote this in the first person, but I doubt I'm the only programmer to ever choke in an interview. Here is a list of techniques for taking a math test and another for taking an oral exam. Maybe I'm not expressing myself well, but I'm asking if there is a similar list of techniques for handling a programming problem under pressure?

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• What are the advantages of Maven when it comes to single man, educational projects

  - by Leron

  I've spend a few hours playing around with Maven + reading some stuff on the apache official site and also a few random googled articles. By this I mean that I really tried to find the answers myself - both by reading and by doing things on my own. Also maybe worth to mention that I installed the m2e plugin so most of the time I've tried things out from Eclipse and not using the command line too much. However aside from the generated project that for example prevent me from using the default package I didn't see that much of a difference with the standard way I've created my projects before try Maven. In fact I've almost decided to skip Maven for now and move on to the other technology I wanted to learn more in-depth - Hibernate, but when I start with opening the official page the first thing I've read was the recommendation to use Hibernate with Maven. That get me confused and made me taking a step back and trying once more to find what I'm obviously missing right now. As it's said in the maven.apache.. site, the true strength of Maven is shown when you work on large projects with other people, but I lack the option to see how Maven is really used in this scenario, still i think that there are maybe advantages even when it comes to working with small projects alone, but I really have difficulties to point them out. So what do you think are the advantages of Maven when it's used for small projects writing from a single person. What are the things that I should be aware of and try to exploit (I mean features offered by Maven) that can come in handy in this situations?

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• Young C++ student lacking direction

  - by ephaitch

  I was hoping for some direction or guidance regarding my C++ learning experience. I have now read two books, from cover to cover, twice. The first was Ivor Horton's Beginning Visual C++ 2010 and Starting out with C++ Early Objects (7th Edition). At this point and after several months I feel like all I know how to do in C++ is create a basic class, define some methods, use the STL, and read and write info to and from the console buffer (cin/cout). But simple things like saving data to a file, reading from a file, printing, connecting to an FTP site, doing some basic graphic manipulation on the screen (not even DirectX/OpenGL), and so-on I can't do or don't even know where to start. I feel I still haven't learned C++ thoroughly. I think you guys get where I'm going with this. I tried downloading SFML and compiling it in Visual C++ 2010 Professional. After quite a bit of time, I got it, but then I was lost. I followed the tutorials and one didn't work. I kept getting an error regarding a missing symbol and after an hour or so on Google, I couldn't figure it out. Can anyone point me in a direction of where one goes from here? I would imagine others have been at this point sometime during their early days.

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• How to implement lockstep model for RTS game?

  - by user11177

  In my effort to learn programming I'm trying to make a small RTS style game. I've googled and read a lot of articles and gamedev q&a's on the topic of lockstep synchronization in multiplayer RTS games, but am still having trouble wrapping my head around how to implement it in my own game. I currently have a simple server/client system. For example if player1 selects a unit and gives the command to move it, the client sends the command [move, unit, coordinates] to the server, the server runs the pathfinding function and sends [move, unit, path] to all clients which then moves the unit and run animations. So far so good, but not synchronized for clients with latency or lower/higher FPS. How can I turn this into a true lockstep system? Is the right methodology supposed to be something like the following, using the example from above: Turn 1 start gather command inputs from player1 send to the server turn number and commands end turn, increment turn number The server receives the commands, runs pathfinding and sends the paths to all clients. Next turn receive paths from server, as well as confirmation that all clients completed previous turn, otherwise pause and wait for that confirmation move units gather new inputs end turn Is that the gist of it? Should perhaps pathfinding and other game logic be done client side instead of on the server, if so why? Is there anything else I'm missing? I hope someone can break down the concept, so I understand it better.

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• Accessing host LVM partition from Windows XP through Virt.manager 0.8.5 / Qemu / KVM

  - by Nico de Smidt

  Hi, requested use case is having a Windows XP SP3 guest running in 64bit Ubuntu. (Linux pcs 2.6.35-22-server #35-Ubuntu SMP Sat Oct 16 22:02:33 UTC 2010 x86_64 GNU/Linux) I want this guest to access an LVM LV on the Ubuntu disk. I've setup the following LVM config: --- Logical volume --- LV Name /dev/storage/sdc1 VG Name storage LV UUID Zg5IMC-OlqB-prL5-fgg4-3A9A-OgKP-oZ0QkJ LV Write Access read/write LV Status available # open 0 LV Size 1.01 GiB Current LE 259 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 251:3 -- 1) I've setup a storage pool for /dev/storage 2) I've mkfs.vfat /dev/storage/sdc1 3) and made a virtual IDE disk in the virt-manager setup for the guest. Target device: IDE Disk 2 Source path: /dev/storage/sdc1 -- Now when running XP (guest) Windows sees a new disk in Disk Manager and want's to install a partition on it, since it believes the drive is empty. After formatting from within Windows I can put data on the new disk volume. -- Back in Ubuntu however I cannot access this this any more since it created a partition within an LVM Logical Volume. Running fdisk -l shows the following: root@pcs:/media# fdisk -l /dev/storage/sdc1 Disk /dev/storage/sdc1: 1086 MB, 1086324736 bytes 32 heads, 63 sectors/track, 1052 cylinders Units = cylinders of 2016 * 512 = 1032192 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x8d72e4f4 Device Boot Start End Blocks Id System /dev/storage/sdc1p1 1 1050 1058368+ c W95 FAT32 (LBA) -- which seems fine to me, but when trying to mount /dev/storage/sdc1p1 I get the following error: mount /dev/storage/sdc1p1 /media/xp mount: special device /dev/storage/sdc1p1 does not exist which makes sense since in lvdisplay sdc1p1 does not exist Main question: I want to mount the vfat partition in both Ubuntu and XP What am I missing here????? regards, and thanks for your consideration. Nico

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• Automated Error Reporting in .NET Reflector - harnessing the most powerful test rig in existence

  - by Alex.Davies

  I know a testing system that will find more bugs than all the unit testing, integration testing, and QA you could possibly do. And the chances are you're not using it. It's called your users. It's a cliché that you should test so that you find your bugs rather than your users. Of course you should. But it's also a cliché that no software is ever shipped bug-free. Lost cause? No, opportunity! I think .NET Reflector 6 is pretty stable. In fact I know exactly how stable it is, because some (surprisingly high) proportion of its users tell me every time it crashes: If they press "Send Error Report", I get: And then I fix it. As a rough guess, while a standard stack trace is enough to fix a problem 30% of the time, having all those local variables in the stack trace means I can fix it about 80% of the time. How does this all happen? Did it take ages to code this swish system? Nope, it was one checkbox in SmartAssembly. It adds some clever code to your assembly to capture local variables every time an exception is thrown, and to ask your user to report it to you, with a variety of other useful information. Of course not all bugs show up as exceptions. But if you get used to knowing that SmartAssembly will tell you when an exception happens, you begin to change your coding style. Now, as long as an exception gets thrown in any situation you don't expect, you'll fix it if it ever happens. You'll start throwing exceptions liberally, and stop having to think about whether tiny edge cases are possible, as long as they throw an exception if they happen.

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• CodePlex Daily Summary for Tuesday, June 26, 2012

  CodePlex Daily Summary for Tuesday, June 26, 2012Popular ReleasesSOLID by example: All examples: All solid examplesJSLint for Resharper: 0.1.4560 Beta: Deadlock removed. No locks before reading cscript output from jslint, not verified to be very safe, but at least VS doesn't crash. Happy linting. :)SiteMap Editor for Microsoft Dynamics CRM 2011: SiteMap Editor (1.1.1726.406): Use of new version of connection controls for a full support of OSDP authentication mechanism for CRM Online.DotNetNuke® Form and List: 06.00.02: DotNetNuke Form and List 06.00.02 Changes in 06.00.02 The scripts are now finally compatible with SQL Azure, tested in a new instance on Azure. If you are not targetting Azure, there is no need to upgrade from 06.00.01 (it won't hurt though). Changes in 06.00.01 Icons are shown in module action buttons (workaraound to core issue with IconAPI) Fix to Token2XSL Editor, changing List type raised exception MakeTumbnail and ShowXml handlers had been missing in install package Updated ...StreamInsight Samples: StreamInsight Product Team Samples V2.1: These samples correspond to the new StreamInsight APIs introduced with V2.1.Umbraco CMS: Umbraco CMS 5.2: Development on Umbraco v5 discontinued After much discussion and consultation with leaders from the Umbraco community it was decided that work on the v5 branch would be discontinued with efforts being refocused on the stable and feature rich v4 branch. For full details as to why this decision was made please watch the CodeGarden 12 Keynote. What about all that hard work?!?? We are not binning everything and it does not mean that all work done on 5 is lost! we are taking all of the best and m...IIS Express Manager: IIS Express 0.31 B: V0.1B - 04 May, 2012 Initiated Project. V0.2B - 05May, 2012 1. Fixed small bug. Threw error when stop button was pressed in an already stopped application. 2. Removed start and stop button. Double clicking on list items will now stop / start the websites. 3. Improved code readability. 4. Changed Orientation of Buttons in UI. V0.3B - 06May, 2012 1. Complete modification of IISEM and process ID handling 2. IISEM is now capable of reflecting the existing IISExpress processes right from startup...SPMegaMenu 0.2.0.a: SPMegaMenu 0.2.0.a: SPMegaMenu 0.2.0.a - *Refined the menu to allow for sub category additions. *Release 0.1.0.a did not allow for sub categories. *Also added a Javascript Array Prototype to facilitate removal of duplicates in the sub category return. (the prototype is added as a workaround as I am not able to get the CAML GroupBy function to work correctly against a lookup column)CodeGenerate: CodeGenerate Alpha: The Project can auto generate C# code. Include BLL Layer、Domain Layer、IDAL Layer、DAL Layer. Support SqlServer And Oracle This is a alpha program,but which can run and generate code. Generate database table info into MS WordXDA ROM HUB: XDA ROM HUB v0.9: Kernel listing added -- Thanks to iONEx Added scripts installer button. Added "Nandroid On The Go" -- Perform a Nandroid backup without a PC! Added official Android app!ExtAspNet: ExtAspNet v3.1.8.2: +2012-06-24 v3.1.8 +????Grid???????（???????ExpandUnusedSpace????????）（??）。 -????MinColumnWidth（??????）。 -????AutoExpandColumn，???????????????（ColumnID）（?????ForceFitFirstTime??ForceFitAllTime，??????）。 -????AutoExpandColumnMax?AutoExpandColumnMin。 -????ForceFitFirstTime，????????????，??????????（????????????）。 -????ForceFitAllTime，????????????，??????????（??????????????????）。 -????VerticalScrollWidth，????????（??????????，0?????????????）。 -????grid/grid_forcefit.aspx。 -???????????En...AJAX Control Toolkit: June 2012 Release: AJAX Control Toolkit Release Notes - June 2012 Release Version 60623June 2012 release of the AJAX Control Toolkit. AJAX Control Toolkit .NET 4 – AJAX Control Toolkit for .NET 4 and sample site (Recommended). AJAX Control Toolkit .NET 3.5 – AJAX Control Toolkit for .NET 3.5 and sample site (Recommended). Notes: - The current version of the AJAX Control Toolkit is not compatible with ASP.NET 2.0. The latest version that is compatible with ASP.NET 2.0 can be found here: 11121. - Pages using ...WPF Application Framework (WAF): WPF Application Framework (WAF) 2.5.0.5: Version: 2.5.0.5 (Milestone 5): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Changelog Legend: [B] Breaking change; [O] Marked member as obsolete WAF: Add IsInDesignMode property to the WafConfiguration class. WAF: Introduce the IModuleController interface. WAF: Add ...Windows 8 Metro RSS Reader: Metro RSS Reader.v7: Updated for Windows 8 Release Preview Changed background and foreground colors Used VariableSizeGrid layout to wrap blog posts with images Sort items with Images first, text-only last Enabled Caching to improve navigation between framesConfuser: Confuser 1.9: Change log: * Stable output (i.e. given the same seed & input assemblies, you'll get the same output assemblies) + Generate debug symbols, now it is possible to debug the output under a debugger! (Of course without enabling anti debug) + Generating obfuscation database, most of the obfuscation data in stored in it. + Two tools utilizing the obfuscation database (Database viewer & Stack trace decoder) * Change the protection scheme -----Please read Bug Report before you report a bug-----...XDesigner.Development: First release: First releaseBlackJumboDog: Ver5.6.5: 2012.06.22 Ver5.6.5 　(1) FTP??????? EPSV ??　EPRT　???????MVVM Light Toolkit: V4RTM (binaries only) including Windows 8 RP: This package contains all the latest DLLs for MVVM Light V4 RTM. It includes the DLLs for Windows 8 Release Preview. An updated Nuget package is also available at http://nuget.org/packages/MvvmLightLibs An installer with binaries, snippets and templates will follow ASAP.Weapsy - ASP.NET MVC CMS: 1.0.0: - Some changes to Layout and CSS - Changed version number to 1.0.0.0 - Solved Cache and Session items handler error in IIS 7 - Created the Modules, Plugins and Widgets Areas - Replaced CKEditor with TinyMCE - Created the System Info page - Minor changesAcDown????? - AcDown Downloader Framework: AcDown????? v3.11.7: ?? ●AcDown??????????、??、??????。????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????，??????、????????????????。 ● AcDown??????????????????，????????????????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)，?????"?????????"??? ??????????????，??????????： ??"AcDown?????"????????? ...New Projects1000: ONE THOUSANDBackground Folder Copy for Sharepoint 2010: En esta solución se combinan varios elementos para conseguir sincronizar una carpeta local o compartida con una librería de documentos de Sharepoint 2010Cache in sandbox: The illustration for the question on Stack Overflow: http://stackoverflow.com/q/11182321/240613CCITTCodecs: A native .NET CCITT Group4 Codec. This is NOT a full featured tiff library. It only encodes pixels into group4.CharTest: Small utility that allows you to analyze a string of characters and see at-a-glance in which categories each characters belongs and other small features.EDT Attribute Editor: One of the applications in the Ecosystem Diagnosis & Treatment suite.EDT Geometry Navigator: One of the applications in the Ecosystem Diagnosis & Treatment suite.EDT Population Editor: One of the applications in the Ecosystem Diagnosis & Treatment suite.EDT Report Generator: One of the applications in the Ecosystem Diagnosis & Treatment suite.ePay payment gateway provider for NB_Store: ePay payment gateway provider for DNN module NB_StoreFizzBuzzCode: FizzBuzz coding assignmentINI Library: The IniLibrary is a simplified C# library for accessing INI files quickly and efficiently. It is able to parse virtually all INI files.jos .net sdk: jos .net sdkjQuery Metro Plug in: Simple jQuery plug in to create easy Metro UI.Metro Event To Command: Metro Event To Command is a replacement for EventToCommand behavior for Windows RT. MyMichael: My MichaelNETDeob0: .NET Deobfuscator by UbbeLoLNokia Image Downloader: Simple application to download image and video files from some source (typically phone). Application ensures that only new files will be downloaded into specified folder; previously downloaded files are ignored. Moreover, user can specify which folders will be searched for image and video files.PaRV: Parallelizing Runtime Detection and Prevention of Concurrency Errors: Will be added soonSimple Things to do website: Users can manage their own individual to-do lists by registering themselves on this site.SP Workflows: The SP Workflows utility is a tool used for monitoring a “Workflow Internal State” and “Workflow Status” for the workflows associated to a SharePoint List testdd06252012: zxctestddgit062520122: ghtestddhg06252012: zcxtesthg062520122: gfTopAddIn: Excel???? VSTOUniversal redirector: Use NTFS junctions to redirect directories, the easy way!VSE: This is a source management site for VSE before deployed.WPFClock: Simple clock app, written in WFP.www.blfoley.com Samples by Bradley Foley: A project containing various sample on quick ways to do thingsZune Connection Detector: A quick, clean method to detect if Zune is connected with Windows Phone.zy26: zy26 was here...

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• Chrome Time Track Is a Simple Task Time Tracker

  - by ETC

  If you don’t need advanced project tracking but still want to track how long it takes you to finish certain tasks or projects, Chrome Time Tracker is a free Chrome extension with a dead simple interface. Install the extension and a Time Track icon appears in your toolbar. Click it to create new tasks, delete old tasks, and start, stop, and reset your task timers. When the timer is running the icon changes to indicate you’re on the clock; pause the timer and it toggles back to the default icon. Hit up the link below to grab a copy. Chrome Time Track is free and works wherever Google Chrome does. Chrome Time Track [Google Chrome Extensions] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware The Citroen GT – An Awesome Video Game Car Brought to Life [Video] Final Man vs. Machine Round of Jeopardy Unfolds; Watson Dominates Give Chromium-Based Browser Desktop Notifications a Native System Look in Ubuntu Chrome Time Track Is a Simple Task Time Tracker Google Sky Map Turns Your Android Phone into a Digital Telescope Walking Through a Seaside Village Wallpaper

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• Free Windows Store and Phone Developer Accounts for MSDN Subscribers

  - by Clint Edmonson

  If you are a member/subscriber to any of the following programs you are eligible to receive one-time, 12-month Windows Store and Windows Phone developer accounts.  Visual Studio Professional with MSDN Visual Studio Test Professional with MSDN Visual Studio Premium with MSDN Visual Studio Ultimate with MSDN BizSpark On September 11, 2012 Microsoft announced that Windows Store is open to individual developers (Company only registration became available on August 1st). This means that eligible MSDN subscribers will be able to select between an individual and company account when registering for their developer account benefit.   New or existing subscribers will see developer accounts listed as a benefit on the Getting Started page as well as various MSDN overview pages. Now that you have this benefit why not get started.  To activate this benefit, subscribers are provided with a unique token for each of the developer accounts. The tokens will work for both individual and company registration. To acquire and redeem the token: 1. Log into My Account. 2. Click on ‘Get Code’. A unique token will be delivered to each subscriber. 3. Click on ‘How to Register’ (link will appear once code is claimed). A developer account details page will display that includes an overview of the benefit, token and registration information. 4. Click on the link to ‘Register your code’.  This launches the developer account registration process. Ready to start developing?  Head over to Generation App to get started.

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• Can't boot Windows Xp after intalling Ubuntu 12.04

  - by Omul Neted

  Here's the situation. I installed Ubuntu using the along side option. Everything went ok. When I restarted I went strait to Ubuntu and it worked beautifully. When I restarted and tried to enter windows, the loading screen appeared, and after 3 -4 seconds it restarted again. No error, no cursor waiting, no nothing. I looked on the internet for help and found several resources. I tried first lilo since it seemes that many people had they're issues solved with it. After lilo neither ubuntu nor Windows would start. I installed and used bootinfoscript. The RESULTS.txt can be seen below https://www.dropbox.com/sh/r3luoa672qe73uq/Mob13HhNiB After that I looked at Boot-Repair I did as instructed here Can't boot XP after Ubuntu Installation, how to fix? ,meaning I redid the mbr of my Ubuntu install using a generic mbr. with no success. The results of boot-repair are in the first link. Now when I restart my computer I don't even get the windows loading screen, just Missing operating system Missing operation system Operating system not found that's it. I did not use the fixboot or fixmbr option because I don't have a windows cd cabable of seeing my hdd drivers. The usual XP windows setup tells me that I have no hdd. Please help, I don't know what to to next. This is my first time with Ubuntu or any Linux OS.

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• Create Shortened goo.gl URLs in Your Favorite Browser

  - by Asian Angel

  Now that the new goo.gl URL shortening service has been active for a bit you may be wanting to add it to your favorite non Internet Explorer/Firefox browser. See how easy it is to enjoy that goo.gl URL shortening goodness with the “goo.gl with prompt for copying Bookmarklet”. goo.gl with Prompt for Copying Bookmarklet In Action To add the bookmarklet to your browser simply drag it to your “Bookmarks Toolbar” and get ready to start creating those shortened URLs. For our example we chose one of the wonderful malware removal articles here at the site. All that you will need to do is click on the bookmarklet to create your shortened URL. The wonderful thing about this bookmarklet is the small pop-up window that provides an easy way for you to copy the shortened URL. You can see the “Context Menu” for the small window here…definitely nice. Once you have copied your new URL you can close the window by clicking on “OK” or pressing “Enter”. Now you are ready to use your new shortened goo.gl URL wherever you like or need to. Conclusion If you have been wanting to add goo.gl URL shortening power to your favorite browser then this is the perfect bookmarklet to have. Links Add the goo.gl with Prompt for Copying Bookmarklet to Your Favorite Browser Similar Articles Productive Geek Tips See Where Shortened URLs “Link To” in Your Favorite BrowserVerify the Destinations of Shortened URLs the Easy WayA Quick Look at URL Shortening Services & ExtensionsCreate Shortened goo.gl URLs in Google Chrome the Easy WayText-Only URL Quick-Fix for Firefox TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Open Multiple Links At One Go NachoFoto Searches Images in Real-time Office 2010 Product Guides Google Maps Place marks – Pizza, Guns or Strip Clubs Monitor Applications With Kiwi LocPDF is a Visual PDF Search Tool

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• So, whats the best book on C#?

  - by mbcrump

  I see this question several times a day from newbie’s to professionals. I have listed the best C# books that I have read so far.   ECMA-334 C# Language Specification. – FREE book. This is probably the best place to start. Read it backwards and forwards and you can even request a hard copy. Absolute Beginners Guide to C Sharp 2nd Edition – Used this early on and found it very useful even if its game programming. C-Sharp 2.0 - The Complete Reference, 2nd Edition (McGraw-Hill, 2006) – One of the most useful books that is always with me. It contains short example code and is very well written. Dot Net Zero - Charles Petzold  - FREE book and you should definately give it a read. C Sharp in Depth by Jon Skeet -  Probably one of the most in depth books on C Sharp and definitely not for beginners. Jon Skeet knows C# like no other. I would consider this book the Bible of C#. If you understand 50% of this book, you have a good understanding of the language.  CLR via C Sharp 3rd Edition – I just started reading this book and it is another book thats not for beginners. If you really want to understand the CLR then give this book a try. Well, thats it. I hope you enjoy the books as I have spent a lot of time researching different C# books.

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• How to calculate turn heading to a missile?

  - by Tony

  I have a missile that is shot from a ship at an angle, the missile then turns towards the target in an arc with a given turn radius. How do I determine the point on the arc when I need to start turning so the missile is heading straight for the target? EDIT What I need to do before I launch the missiles is calculate and draw the flight paths. So in the attached example the launch vehicle has a heading of 90 deg and the targets are behind it. Both missiles are launched at a relative heading of -45deg or + 45 deg to the launch vehicle's heading. The missiles initially turn towards the target with a known turn radius. I have to calculate the point at which the turn takes the missile to heading at which it will turn to directly attack the target. Obviously if the target is at or near 45 degrees then there is no initial turn the missile just goes straight for the target. After the missile is launched the map will also show the missile tracking on this line as indication of its flight path. What I am doing is working on a simulator which mimics operational software. So I need to draw the calculated flight path before I allow the missile to be launched. In this example the targets are behind the launch vehicle but the precalculated paths are drawn.

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• Nvidia optimus and Steam (on 12.04)

  - by Seiryuu

  I've obtained a copy of the .deb for the Steam beta, but it was pretty disappointing to see that it simply doesn't run. Hardware - Dell XPS L502, with Nvidia Optimus I have bumblebee installed. Trying to run Steam with the Intel HD 3000 completely fails to start it. Message received Installing breakpad exception handler for appid(steam)/version(1352224866_client) followed by a crash with no other information provided. Trying to optirun steam runs the client, but as soon as it gets to the home screen, it says that the Nvidia drivers I am using are out of date (and Steam requires newer drivers to run). It's probably worth to note that it throws the same Installing breakpad... error when run with optirun, but it doesn't crash the client immediately. Any way to fix this? Also, is there a way of manually updating the drivers in bumblebee without breaking anything? Alternatively, is there a reliable way of completely disabling the Intel GPU (in order to use the Nvidia GPU exclusively)? Note: I am using Xmonad with gnome-fallback, if that makes a difference. However, when I tried everything mentioned with Unity (2d), everything was the same, so I guess it has nothing to do with the window manager in use.

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• Can't add NetworkManager applet to gnome panel

  - by Nate

  I have researched this problem extensively and I can't seem to find an answer. In Ubuntu 10.04 LTS, I want to connect to my VPN through the NetworkManager applet. I installed all the network manager packages, including the gnome client. I understand I need to add the "Notification Area" to the panel, which I have done. I checked that the NetworkManager is running: nate@nate-desktop:~$ service network-manager status network-manager start/running, process 763 In /etc/NetworkManager/nm-system-settings.conf, I have added managed=true (don't know if this matters, but I saw it suggested on one forum): nate@nate-desktop:~$ more /etc/NetworkManager/nm-system-settings.conf # This file is installed into /etc/NetworkManager, and is loaded by # NetworkManager by default. To override, specify: '--config file' # during NM startup. This can be done by appending to DAEMON_OPTS in # the file: # # /etc/default/NetworkManager # [main] plugins=ifupdown,keyfile [ifupdown] #managed=false managed=true I restarted NetworkManager and tried rebooting, too. At this point, it looks like NetworkManager is running but it's not appearing in the NotificationArea of the panel. I don't know what else to try. Any ideas?

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• Ubuntu won't boot after initializing the Build Environment for Android

  - by EntryLevelDev

  My laptop worked perfectly util I initialized the build environment for Android. The GUI won't start. It looks like some kinds of graphics card problems. I tried to fix it but after trying a lot of solutions on the internet nothing worked. (I only know basic linux stuffs.) I've already reinstalled the OS. However, I still want to build the Android from source. Any idea what might cause the problem? any workaround? Here is the command that I used to initialize the build environment: $ sudo apt-get install git gnupg flex bison gperf build-essential \ zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev \ libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386 \ libgl1-mesa-dev g++-multilib mingw32 tofrodos \ python-markdown libxml2-utils xsltproc zlib1g-dev:i386 $ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so My laptop model is asus u36sd. (https://help.ubuntu.com/community/Asus_U36SD) Thanks Edit: Base on this, I guess libgl1-mesa-glx:i386 might cause the issue. sudo apt-get install libgl1-mesa-dri:i386 The following packages will be REMOVED: libgl1-mesa-dri-lts-quantal libxatracker1-lts-quantal ubuntu-desktop xorg xserver-xorg-lts-quantal xserver-xorg-video-all-lts-quantal xserver-xorg-video-vmware-lts-quantal The following NEW packages will be installed: libdrm-intel1:i386 libdrm-nouveau1a:i386 libdrm-radeon1:i386 libdrm2:i386 libexpat1:i386 libffi6:i386 libgl1-mesa-dri:i386 libllvm3.0:i386 libpciaccess0:i386 libstdc++6:i386

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• Algorithmically generating neon layers on pixel grid

  - by user190929

  In an attempt at a screensaver I am making, I am a fan of neo-like graphics, which, of course, look great against a black background. As I understand it, neon, graphically speaking, is essentially a gradient of a color, brightest in the center, and gets darker proceeding outward. Although, more accurate is similar, but separating it into tubes and glow. The tubes are mostly white, while the glow is where most of the color is seen. Well... the tubes could also be a light variant of the color, you could say. The glow is darker. Anyhow, my question is, how could you generate such things given an initial pattern of pixels that would be the tubes? For example, let's say I want to make a neon 'H'. I, via the libraries, can attain the rectangles of pixels which represent it, but I want to make it look neonized. How could I algorithmically achieve such an effect given a base tube shape and base color? EDIT: ok, I mistated that. Got a bit distracted. My purpose for this was similar to a neon effect, but not. Sorry about that. What I am looking for is something like this: Start with a pattern of pixels: [!][!][!][!][!][!][!][!] [!][!][O][!][!][!][!][!] [!][!][O][O][!][!][!][!] [!][!][!][!][O][!][!][!] [!][!][!][!][!][!][!][!] How to I find the U pixels? [!][E][E][E][!][!][!][!] [!][E][O][E][E][!][!][!] [!][E][O][O][E][E][!][!] [!][E][E][E][O][E][!][!] [!][!][!][E][E][E][!][!] Sorry if that looks bad.

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• Ubuntu 12.04 - Brightness controls not working

  - by Juan Manuel Zolezzi Volpi

  Controls from "Brightness and Lock" were not working so I've tried a solution that involved changing grub, which I'm detailing below: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" After doing this, the brightness control dissapeared like you can see at http://screencloud.net/img/screenshots/6b90d56604b70cc749a632d0bc005a20.png Any ideas? Would love to be able to configure Brightness or even use apps like F.lux to regulate it automatically. Edit: I've modified the following line to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" and now the brightness controls are back, but whatever I change the brightness remains the same. Just in case I'm using Intel H77

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• Five Holiday Gaming Tips for an Active Game Table

  - by Jason Fitzpatrick

  Getting together for the holidays represents a great oppurtunity to introduce new players to the fun of tabletop gaming. Make sure to introduce them right with these five handy tips. Courtesy of GeekDad, we find five tips for introducing new players to the fun of tabletop games old and new over the holidays. Tip number one: 1. Start short. Not everyone is ready for a multi-hour game session right after a big holiday dinner. Post-prandial drowsiness doesn’t go well with a game that takes twenty minutes to set up and another fifteen to explain, so don’t lose your audience before you get to the good stuff. Pick something speedy that gets people into the game with little downtime. If possible, get them laughing — I hear it causes the release of endorphins, which makes them feel better, which will lead to more gaming. (We’ll work on the dopamine receptors later, when you get them hooked on learning new games.) Games like Zombie Dice and Spot It! are easy to teach and can handle a pile of players. FlowerFall and Ca$h ‘n’ Gun$ are guaranteed to make people gravitate to the game table to see what’s going on. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• Welcome to the Red Gate BI Tools Team blog!

  - by BI Tools Team

  Welcome to the first ever post on the brand new Red Gate Business Intelligence Tools Team blog! About the team Nick Sutherland (product manager): After many years as a software developer and project manager, Nick took an MBA and turned to product marketing. SSAS Compare is his second lean startup product (the first being SQL Connect). Follow him on Twitter. David Pond (developer): Before he joined Red Gate in 2011, David made monitoring systems for Goodyear. Follow him on Twitter. Jonathan Watts (tester): Jonathan became a tester after finishing his media degree and joining Xerox. He joined Red Gate in 2004. Follow him on Twitter. James Duffy (technical author): After a spell as a writer in the video game industry, James lived briefly in Tokyo before returning to the UK to start at Red Gate. What we're working on We launched a beta of our first tool, SSAS Compare, last month. It works like SQL Compare but for SSAS cubes, letting you deploy just the changes you want. It's completely free (for now), so check it out. We're still working on it, and we're eager to hear what you think. We hope SSAS Compare will be the first of several tools Red Gate develops for BI professionals, so keep an eye out for more from us in the future. Why we need you This is your chance to help influence the course of SSAS Compare and our future BI tools. If you're a business intelligence specialist, we want to hear about the problems you face so we can build tools that solve them. What do you want to see? Tell us! We'll be posting more about SSAS Compare, business intelligence and our journey into BI in the coming days and weeks. Stay tuned!

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• Welcome to the Red Gate BI Tools Team blog!

  - by Red Gate Software BI Tools Team

  Welcome to the first ever post on the brand new Red Gate Business Intelligence Tools Team blog! About the team Nick Sutherland (product manager): After many years as a software developer and project manager, Nick took an MBA and turned to product marketing. SSAS Compare is his second lean startup product (the first being SQL Connect). Follow him on Twitter. David Pond (developer): Before he joined Red Gate in 2011, David made monitoring systems for Goodyear. Follow him on Twitter. Jonathan Watts (tester): Jonathan became a tester after finishing his media degree and joining Xerox. He joined Red Gate in 2004. Follow him on Twitter. James Duffy (technical author): After a spell as a writer in the video game industry, James lived briefly in Tokyo before returning to the UK to start at Red Gate. What we’re working on We launched a beta of our first tool, SSAS Compare, last month. It works like SQL Compare but for SSAS cubes, letting you deploy just the changes you want. It’s completely free (for now), so check it out. We’re still working on it, and we’re eager to hear what you think. We hope SSAS Compare will be the first of several tools Red Gate develops for BI professionals, so keep an eye out for more from us in the future. Why we need you This is your chance to help influence the course of SSAS Compare and our future BI tools. If you’re a business intelligence specialist, we want to hear about the problems you face so we can build tools that solve them. What do you want to see? Tell us! We’ll be posting more about SSAS Compare, business intelligence and our journey into BI in the coming days and weeks. Stay tuned!

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• Cannot install openjdk on Hardy Heron

  - by infaustus

  I know that Hardy Heron is very old but don't ask why Hardy... I've tried root@vz10931:/etc/apt# apt-get install openjdk-6-jre Reading package lists... Done Building dependency tree Reading state information... Done You might want to run `apt-get -f install' to correct these: The following packages have unmet dependencies: openjdk-6-jre: Depends: libasound2 (> 1.0.14) but it is not going to be installed Depends: libgif4 (>= 4.1.6) but it is not going to be installed Depends: libxtst6 but it is not going to be installed Depends: openjdk-6-jre-headless (>= 6b18-1.8.3-0ubuntu1~8.04.2) but it is not going to be installed vim: Depends: vim-common (= 1:7.1-138+1ubuntu3.1) but 2:7.3.154+hg~74503f6ee649-2ubuntu3 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). My sources.list deb http://pl.archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse deb-src http://pl.archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse deb http://pl.archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse deb-src http://pl.archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse deb http://security.ubuntu.com/ubuntu hardy-security main restricted universe multiverse deb-src http://security.ubuntu.com/ubuntu hardy-security main restricted universe multiverse And root@vz10931:/etc/apt# ls -l sources.list.d/ total 0 Please help. When I've tried apt-get install -f I had install new system because everything crashed. Edit: I checked that i have openjdk installed root@vz10931:/var/www/mailer# dpkg --list | grep java iU sun-java6-bin 6.24-1build0.8.04.1 Sun Java(TM) Runtime Environment (JRE) 6 (ar iU sun-java6-jdk 6.24-1build0.8.04.1 Sun Java(TM) Development Kit (JDK) 6 iU sun-java6-jre 6.24-1build0.8.04.1 Sun Java(TM) Runtime Environment (JRE) 6 (ar but when i am trying to start java file: java -jar program.jar error appear -bash: java: command not found

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• Is it wise to ask about design decisions made on a product during an interview?

  - by Desolate Planet

  I've been thinking about interview questions lately and I've been reflecting on bad interview experiences I've had in the past. One of particular note is where I had asked the interviewer why the team chose to use Spring over EJB3 in their product. The interviewer pretty much tore my face off, yelling "Because Spring is not the be all and end all of Java software development, do you want this job or not?". In response to this, I told him that this probably wasn't the job for me and I walked out the interview. He told me at the start of the interview that they had high stuff turnover, the product had gone from Modula 3 to Perl to Java then after asking him a technical question, he went in flames. It seemed obvious to me that he was toxic to the company with that kind of attitude. Question: Is it a good idea to probe on architectural choices taken in an interview? If not, why? From my own point of view, an interview is a two-way process. If the interviewers are testing me on my technical skills, I've got every right to ask them the same questions to 1) Figure out what their mindset and attitudes towards developing software solutions are and 2) To figure out if there are in line with how I would approach problems of that kind. It's very possible that the interviewer who got angry was a bad interviewer and forgot that an interview is a two-way process. If I was asked this, I would have simply said something along the lines of wanting to leverage the container more, but I certainly wouldn't have tried to put him in a state of meek capitulation. The interviewer in question was the lead developer in the team.

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• Ubuntu 13.10 installed and worked, but now not working

  - by San

  I have a HP G7000 laptop. I updated/upgraded from 13.04 to 13.10, after the software updater recommended I upgrade. I have duel booting system with Windows Vista. The system was working for the past two days, but I start getting the errors below, after selecting Ubuntu in Grub Menu on startup and at the splash screen it says "Press S to Skip or M for manual configuration" Pressing S gives a black screen and m takes you the errors below. Windows boots and works fine after selection in the Grub Menu. [ 15.235703] EXT3-fs (sda5): error: unrecognized mount option "discard" or missing value. [ 16.788072] [drm:intel_pipe_config_compare] *ERROR* mismatch in adjusted_mode flags [expected 2, found 0] [ 20.860071] [drm:intel_pipe_config_compare] *ERROR* mismatch in adjusted_mode flags [expected 2, found 0] [ 20.980076] [drm:intel_pipe_config_compare] *ERROR* mismatch in adjusted_mode flags [expected 2, found 0] Root filesystem Check failed root@simamhar:~# Tried boot-repair using the LiveCD method, no luck. System still gives above error. (you can view the boot-repair log here http://paste.ubuntu.com/6287287) When I use the liveCD for 13.04 or 13.10 however, my hard disk is recognized and I can read the files. Why is it that the installation on the hard disk has stopped working and does not recognize my / ? What do the above errors mean and how can i solve them? There was no power failure before, during or after the update/upgrade process from 13.04 to 13.10. I now would like to go back to 13.04 without reinstalling afresh? Any help will be appreciated. Thanks.

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• Limiting game loop to exactly 60 tics per second (Android / Java)

  - by user22241

  So I'm having terrible problems with stuttering sprites. My rendering and logic takes less than a game tic (16.6667ms) However, although my game loop runs most of the time at 60 ticks per second, it sometimes goes up to 61 - when this happens, the sprites stutter. Currently, my variables used are: //Game updates per second final int ticksPerSecond = 60; //Amount of time each update should take final int skipTicks = (1000 / ticksPerSecond); This is my current game loop @Override public void onDrawFrame(GL10 gl) { // TODO Auto-generated method stub //This method will run continuously //You should call both 'render' and 'update' methods from here //Set curTime initial value if '0' //Set/Re-set loop back to 0 to start counting again loops=0; while(System.currentTimeMillis() > nextGameTick && loops < maxFrameskip){ SceneManager.getInstance().getCurrentScene().updateLogic(); //Time correction to compensate for the missing .6667ms when using int values nextGameTick+=skipTicks; timeCorrection += (1000d/ticksPerSecond) % 1; nextGameTick+=timeCorrection; timeCorrection %=1; //Increase loops loops++; } render(); } I realise that my skipTicks is an int and therefore will come out as 16 rather that 16.6667 However, I tried changing it (and ticksPerSecond) to Longs but got the same problem). I also tried to change the timer used to Nanotime and skiptics to 1000000000/ticksPerSecond, but everything just ran at about 300 ticks per seconds. All I'm attempting to do is to limit my game loop to 60 - what is the best way to guarantee that my game updates never happen at more than 60 times a second? Please note, I do realise that very very old devices might not be able to handle 60 although I really don't expect this to happen - I've tested it on the lowest device I have and it easily achieves 60 tics. So I'm not worried about a device not being able to handle the 60 ticks per second, but rather need to limit it - any help would be appreciated.

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