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  • Check if the vector is behind another or maybe opposite directions?

    - by Gilson
    I'm doing a network game and on the client side, i interpolate the client position with the server sent extrapolated position. The client has its own physics simulation wich is corrected by the server in steps. The problem is when it laggs and i 'kick' the ball, the server gets a delayed message and sends me the position backwards of the client position wich makes the ball goes back and forth. I want to ignore those and maybe compensate that on the server, not sure though. The problem is the clock difference on those case are 0.07ms or 0.10 ms wich isn't that high to ignore the message i guess. When i get the server position, i extrapolate with the clock interval * serverBallVelocity Can i check if my new ball server position is behind my actual ball vector position? I tried to use the dot product after normalized the two vectors to check if they are opposite but it ain't working properly. Any suggestions on checking that?

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  • Mouse stopped responding after installing Ubuntu Server

    - by Danijar
    It was 2 operating systems on my machine, Windows 7 and Ubuntu Desktop 12.04, both 64bit version. All works well, firstly I installed Win, then the Desktop version of Ubuntu, lasts's GRUB rewrites windows's boot and of course added it as a variant to load. Yesterday I wish to play with Ubuntu Server 12.04, and install it as a third operating system. During the installation Server's GRUB seems to rewrite that which installed earlier (background color became black, was purple). Firstly, newly installed GRUB generates me overmuch load options for Ubuntu Desktop, by two for each kernel version (normal and recovery modes). OK, it's bearable, but most thing, that the mouse on this machine is totally stops responding, regardless which operating system I choose to load. Hope somebody help me. Thanks in advance!

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  • NASCIO Award for NetBeans Platform Legislative Software

    - by Geertjan
    Two days ago, 23 October 2012, the Kansas Legislative Information System and Services (KLISS) was awarded the 2012 NASCIO Award for Open Government at the NASCIO annual State IT Recognition awards. KLISS is developed by Propylon in partnership with the executive and legislative branches of the Kansas Government involving a complete overhaul of the Legislature's IT systems. This video gives an overview of the system: In other good news, Propylon has recently announced that it will work with the Indiana Legislative Services Agency to implement a complete Legislative Enterprise Architecture. For details on the NetBeans Platform angle to all this, in addition to watching the movie above, see Legislative Software on NetBeans. And note that Java developers with NetBeans Platform experience are welcome to apply to work at Propylon. And congratulations to the Propylon team!

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  • Computer science [closed]

    - by user73589
    I'm a computer science graduate Information systems department. I graduated this year with GPA 3.8 but I'm totally lost, we didn't work on making applications and writing a lot of codes at college. I feel that if I applied in any job I won't be taken because I don't have any knowledge. I'm a very hardworker but I don't know from where to start and what to do. Should I go for web design and that staff or for Android and mobile applications? What can I do and how to start?

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  • Unable to empty the rubbish bin

    - by gman
    When I attempt to empty the rubbish bin the preparing window opens but nothing happens. In testing I tried to delete 1 file from the rubbish bin and received a time-out error. No files are removed from the rubbish bin after this. I have added a screen shot that includes a display of system monitor that shows high CPU usage for trash and Nautilus; not sure whether it is related. Click for a full-resolution image. Also, on a separated note, Bleachbit was also freezing on me, which may or may not be related?

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  • Adding multiplayer to an HTML5 game

    - by espais
    I am interested in making a game that I currently have a co-op experience, however I'm curious as to the best method of implementing this in HTML5. I have made games before using straight C sockets, and also with the Net library for SDL. What are some of my best options for doing this in a canvas-based environment? At present, all I can come up with are either AJAX/database solutions (with a high refresh rate), or somehow implementing a PHP server that would funnel the data through sockets. The overall gameplay would be a 2.5D platformer-ish type of game, so both clients would need to be continually updated with player positions, enemy positions, projectiles, environmental data, etc.

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  • Is it okay to have many Abstract classes in your application?

    - by JoseK
    We initially wanted to implement a Strategy pattern with varying implementations of the methods in a commmon interface. These will get picked up at runtime based on user inputs. As it's turned out, we're having Abstract classes implementing 3 - 5 common methods and only one method left for a varying implementation i.e. the Strategy. Update: By many abstract classes I mean there are 6 different high level functionalities i.e. 6 packages , and each has it's Interface + AbstractImpl + (series of Actual Impl). Is this a bad design in any way? Any negative views in terms of later extensibility - I'm preparing for a code/design review with seniors.

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  • How can I motivate the community to use boinc?

    - by user49523
    boinc is a really nice application to use on background of a computer that can help science projects and humanity as a all. I would like somehow to encourage people use boinc with their preferences on boinc like projects choice, cpu from 10 to 100 ,.. with their computer that will help science to move more quickly and help humanity There are 20 million users of ubuntu if most of use boinc , this will increase the speed of science projets .. and if other people from other operating systems use as also like mac,windows,.. and other open source like debian,.. this would even speed more science and now anyone can win also a prize , joining a project management like http://boincstats.com/ and there is more 2 How can i get ubuntu users and ubuntu community to know and use boinc application?

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  • What Do I Need To Know About Servers In a Web Development Role?

    - by john
    I know that may sound a little vague, so I'll try and explain a little further... After being self employed developer for many years I'm now in search of a commercial web developer role. My only experience with servers and hosting is uploading through FTP and playing around with CPanel/WHM a little. The role's I'm going for are web development PHP, MySQL, HTML, CSS type roles, but in recent interviews I've been asked questions about setting up things on the server, that I had no idea what was being said... which wasn't ideal! Without knowing more than I do, it's hard to explain what exactly I'm looking to learn, but it's basically just the server elements I should know as a web developer? If you're a web developer, do you have any dealing with the server apart from uploading files, and if so, what? Are things like Subversion(SVN) and version control systems often set up by the web development team, could that be what they were talking about?

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  • Why should I use a web framework's template language over python's templating options?

    - by stariz77
    I'm coming from a python CGI background and was wanting to move into something more contemporary and think I have decided upon web.py as the framework I would like to use. In regards to templating, previously I used formatted strings and the string.Template module to effect most of my templating needs. After reading through a few of the templating options I have heard mentioned, I began wondering what the main benefits of using something like the Django or jinja templating options over "native" Python templating options were? Am I just going to be replacing $tmpl_var with {{ tmpl_var }} and s.substitute(tmpl_var=value) with t.render(s), i.e., alternate syntax? or will I gain additional advantages from using these templating systems?

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  • Set modified date = created date or null on record creation?

    - by User
    I've been following the convention of adding created and modified columns to most of my database tables. I also have been leaving the modified column as null on record creation and only setting a value on actual modification. The other alternative is to set the modified date to be equal to created date on record creation. I've been doing it the former way but I recent ran into one con which is seriously making me think of switching. I needed to set a database cache dependency to find out if any existing data has been changed or new data added. Instead of being able to do the following: SELECT MAX(modified) FROM customer I have to do this: SELECT GREATEST(MAX(created), MAX(modified)) FROM customer The negative being that it's a more complicated query and slower. Another thing is in file systems I believe they usually use the second convention of setting modified date = created date on creation. What are the pros and cons of the different methods? That is, what are the issues to consider?

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  • Update GRUB to reflect changed partition location

    - by soandos
    I currently have 3 partitions: Windows, Ubuntu, and swap. I want to move my windows partition by about 20GB. When I try to do this in GParted, it tells me that this will mess up GRUB, and that there is a page that can resolve these issues. However, this page does not actually mention my issue. I am not moving my boot partition (Ubuntu). How can I force GRUB to look for operating systems that are on the drive? I know that this is possible, because when Ubuntu was installed it found Windows without any issues. Additionally, if I create a copy of a partition, how can I add that to GRUB (I assume it will be the same command as above, but if not, what would it be)? Note: OS prober is mentioned here but it doest not list how to use it, or where to find it.

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  • Becoming an expert vs boredom [closed]

    - by QAH
    I am a college student, and I love to program, period. I code all kinds of things in different kinds of languages. Although I enjoy programming, I have an extremely hard time sticking to one project for a long time. I attribute this shortcoming to my high level of curiosity, exploring different technologies, languages, libraries, etc. What would be best? Should I settle down more and spend time on becoming an expert in one or two programming fields, or should I be more of a jack of all trades, trying out all kinds of new technologies, languages, programming methods, etc.? I'm guessing that somewhere in the middle would be best. I'm always amazed at how many developers are able to create one or two projects, and develop on them for years. What techniques do you guys employ to help you stay focused on a project?

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  • Wrong download of Ubuntu 13.10 desktop: AMD instead of wanted Intel [duplicate]

    - by L. Williams
    This question already has an answer here: Difference between the i386 download and the amd64? 5 answers My PCs are Intel CPUs e.g. Core2 Quad, 64 bit, no AMD in network, but from ubuntu.com/download site, selecting 13.10 Desktop for 64 bit, it repeatedly only offers *AMD.ISO version, which of course fails to install on my Intel (or Atom) based PCs. Wuzzup, and what URL has a download for the Intel CPU systems? Rem: this is for Saucy 13.10 Desktop 64 OS ISO. TIA.

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  • After 10.10 -> 11.04 upgrade, can only login via Classic (No Effects)

    - by Ryan P.
    Yesterday I upgraded from 10.10 to 11.04, everything seemed to go okay until immediately after login: the desktop goes into a "corrupted" looking state (similar to having too high resolution set). I can see some kind of movement by moving the mouse around/right clicking, and can enter text terminals via ctrl + alt + f1 It does this in both plain "Ubuntu" and "Ubuntu Classic", and only seems to login/startup properly with Ubuntu Classic (No Effects). I have checked my video card (Radeon X600) and run the unity support test which passes with all "yes" results (Unity supported: yes): /usr/lib/nux/unity_support_test -p I have tried re-installing my Ubuntu desktop: rm -rf .gnome .gnome2 .gconf .gconfd .metacity sudo apt-get remove ubuntu-desktop sudo apt-get install ubuntu-desktop With no success. I can workaround for now with Classic (No Effects), but I'd really like to find the root problem. Any suggestions on what else to try would be appreciated!

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  • Are Web Safe Colors Still Relevant?

    - by VxJasonxV
    I still remember one of my high school teachers lecturing us about the "web safe colors". A set of 216-256 colors that you should confine your designs to use, and nothing else besides them. Last I knew, Photoshop still has the "web safe" yield icon[1] on it's color picker. Are web safe colors still a concern? Outside of the obvious application (accessibility, legacy software versions, etc.), how much consideration should I give to limiting my color choice for my general audience? [1] Or was it the cube? I never remember.

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  • java or .net or xml, SOAP need carrer guidance

    - by s.nigam
    0 down vote favorite Share on Facebook Share on Twitter First of all let me thank you all for reading & devoting time for my question. I am developer with around 3.7 years of experience in .net. I recently discussed & visited some of the websites which states that java is better then .net, a I also discussed with some of the experience persons all suggested me to switch to java of course spring, struts etc. As Java developer is being paid high then .net one. I personally think I should go for web services SOAP, XML etc. thanks to all for response I also want to know if I can only move to webservices ex. WCF, SOAP, XML, XSLT etc. Kindly help me I am bit confused. Thanks

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  • Upgrading Office 2007 to Office 2010, First Look

    In this post, Im going to simply document the process of updating my MIcrosoft Office 2007.  As almost anyone knows who has not been hiding under a rock, Microsoft Office 2010 has been in the... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...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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  • Organizations that encourage kids to program

    - by mwgriffith
    Since my son started going to school, I've been noticing a very serious lack of organizations to encourage kids to program or at least letting them know how to get involved in programming. Are there any groups that you know of to help kids out this area?? And I'm not referring to tools to help kids learn, I'm referring to groups that will help in getting kids interested in programming. Here are a few that I know of: Dreamspark Lego First Robotics Imagine Cup Are there anymore out there? And are there any that work at the elementary - high school levels?? Also are there any other parents that have noticed the same thing, or is this local to my area??

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  • Choices in Architecture, Design, Algorithms, Data Structures for effective RDF Reasoning and Querying in a Big Data Environment [on hold]

    - by user2891213
    As part of my academic project I would like to know what choices in Architecture, Design, Algorithms, Data Structures do we need in order to provide effective and efficient RDF Reasoning and Querying in a Big Data Environment. Basically I want to get info regarding below points: What are the Systems and Software to get appropriate Architecture? What kind of API layer(s) would we need on top of the Big Data stores, to make this possible? The Indexing structures we will need. The appropriate Algorithms, and appropriate Algorithms for Query Planning across Big Data stores. The Performance Analysis and Cost Models we will need to justify the design decisions we have made along the way. Can anyone please provide pointers.. Thanks, David

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  • Deferring questions about salary expectations until the second interview [closed]

    - by Polynomial
    I usually find that interviewers ask about expected salary on a first interview, but I usually feel uncomfortable discussing such details at an early stage. I feel that low-balling a figure might result in under-selling myself, whereas going too high might lose me the chance of a second interview. I also like time to reflect on my interview experience before vocalising my expectations. I recently realised that in one interview I prefixed my salary figure with a justification, which made me come across as a little desperate and unsure of myself. Is there a good way to defer such questions until a second interview (assuming I get one, of course) without hurting my chances or weakening my position?

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  • To be or not to be: a solutions architech [closed]

    - by jQwierdy
    short version: as a student taking a summer internship, whats more useful for later in my career, taking a job as a solutions Architect, or a software engineer? Long version: I'm a CS major in my 3rd year, I've interviewed with some of the big companies and did not get job offers year (Morgan Stanley, Microsoft, FacebooK) but did receive offers from a startup. I actually got two offers from the same start up. I really like the startup and despite the (much) lower wage at it compared to a bigger company, I could do solutions architecture. Solutions architects (I think) work more on figuring out high level solutions directly for clients, so I'd be working often with a sales team and developers. Everyone knows what (generally) a software engineer does. And so my question is this: for my career, what would be more beneficial to a) know how to do, and b) have on my resume.

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  • Follow Your World Notifies You When Satellite Images Update

    - by Jason Fitzpatrick
    Satellite images update infrequently enough to make manually checking for new photos of interesting locations impractical; automate the process with notifications from Follow Your World. Courtesy of Google, the Follow Your World tool allows you to plug in locations and receive email updates when the satellite images for that location are updated. Whether you’re looking for crisp high-res images of monuments around the world or shots of your own backyard, it’s easy to set it up and wait for the updates to roll in. Follow Your World [via Google Lat Long Blog] Hack Your Kindle for Easy Font Customization HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It

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  • How can I explain object-oriented programming to someone who's only coded in Fortran 77?

    - by Zonedabone
    My mother did her college thesis in Fortran, and now (over a decade later) needs to learn c++ for fluids simulations. She is able to understand all of the procedural programming, but no matter how hard I try to explain objects to her, it doesn't stick. (I do a lot of work with Java, so I know how objects work) I think I might be explaining it in too high-level ways, so it isn't really making sense to someone who's never worked with them at all and grew up in the age of purely procedural programming. Is there any simple way I can explain them to her that will help her understand?

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  • Ubuntu will not start any more !!!!!!!! PLEASE HELP?

    - by mike
    I really need help , I left my computer downloading all the night and i did donwload 35 go of movies ( legal ....) , I restart the computed in the morning then i booted in my encrypted windows partition for my work. Surprise in the evening when i try to boot on linux again , then it doesnt start as it's telling me low graphic mode , and doesnt boot( happen when it's really full ) . Tryed in rescue and it's telling me i have 0 mo free. Tryed in shell comand sdo root rm - Some files IMPOSSIBLE . it's telling me that my files are only in read only file systems. I mouted my other hard drive in windows as well but there is a '' Write protection '' i can only read the files. Please let me know , what solution do i have ? Should i try live usb with ubuntu ? Thanks guys

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