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• Android - Multiplayer Game - Client / Server - Java etc

  - by user1405328

  I must write a multiplayer pong game for the school. Where are thousand of rooms and where two players can go in to a room and play together and collect points. I programmed the Pong game using Java (LibGDX). How can I do the Network part. I searched the web. And I came across Kryonet. Is there something better? What should I google. On the Internet there are a lot of those questions. And no good answers. I hope that this most questions can be answered. If someone has actual Open Source network game links, tutorials, books, network tutorial, etc. All this would help everyone. Thank you.

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• Come visit us at OOW 2012 B2B Demo Booth!

  - by user701307

  You’re invited to visit us at the Oracle B2B Demo POD at Oracle OpenWorld and JavaOne 2012. OOW offers a unique opportunity to meet the engineers who have developed the Oracle B2B product. Please stop by at our booth to see cool demos on EDI X12, EDIFACT and SBRES (used in Airlines industry). We will also be showing integration with OSB, SOA Suite and BAM. Use this opportunity to see the product in action, learn, and get answers to your questions. We will be happy to meet you and hear about your B2B integration usecases and discuss our roadmap. The demo pod will be available at the Fusion Middleware Demo POD area on Monday, October 1 through Wednesday, October 3, 2012. Look forward to seeing you there! Happy OOW 2012!

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• https (SSL) instead of http

  - by user1332729

  I am building myself a new website, out of privacy and security concerns I am contemplating trying to make it https only. It will be mobile-friendly using media queries but I am concerned--especially for mobile users--about the increased bandwidth. How much will doing so increase my bandwidth or slow load times? For pages where I'm not transferring sensitive information, should I leave external links (to a jQuery library, or a web font for instance) in http? Simply put, I have read articles saying the entire web would be more secure if everything was SSL but my actual knowledge of implementation is limited to payment gateways and log-in pages and such. I apologize for the open-ended nature of the question but anything, even just simple answers to the specific questions is welcomed.

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• Do you know SqlServer ? Do you want an iPad ?

  - by Dave Ballantyne

  If you’ve answered yes to both of those questions , Jacob Sebastian has some more question for you. Every day in March there is a different question set by a SqlServer community notable member. At the end of the month the answers will be judged, scored and tallied.  The person with the most points will be the proud owner of a shiny new iPad.  Numerou What could be easier ? So what are you waiting for ? Get over to http://beyondrelational.com/quiz/SQLServer/TSQL/2011/default.aspx and give it a go.

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• root password not recognized

  - by Neto Diaz

  I got kubuntu 12.04 on my laptop, but everytime I try t update, install or something like that it does not recoginze my password, here is what the konsole says... ernesto@neto-desktop:~$ sudo apt-get update [sudo] password for ernesto: Sorry, try again. [sudo] password for ernesto: Sorry, try again. [sudo] password for ernesto: Sorry, try again. sudo: 3 intentos de contraseña incorrectos ernesto@neto-desktop:~$ and no advance from there, i am some kind of new for this version (12.04 precise pangolin) and i m not sure what is next, thanks in advance for the help and answers!

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• Object desing problem for simple school application

  - by Aragornx

  I want to create simple school application that provides grades,notes,presence,etc. for students,teachers and parents. I'm trying to design objects for this problem and I'm little bit confused - because I'm not very experienced in class designing. Some of my present objects are : class PersonalData() { private String name; private String surename; private Calendar dateOfBirth; [...] } class Person { private PersonalData personalData; } class User extends Person { private String login; private char[] password; } class Student extends Person { private ArrayList<Counselor> counselors = new ArrayList<>(); } class Counselor extends Person { private ArrayList<Student> children = new ArrayList<>(); } class Teacher extends Person { private ArrayList<ChoolClass> schoolClasses = new ArrayList<>(); private ArrayList<Subject> subjects = new ArrayList<>(); } This is of course a general idea. But I'm sure it's not the best way. For example I want that one person could be a Teacher and also a Parent(Counselor) and present approach makes me to have two Person objects. I want that user after successful logging in get all roles that it has (Student or Teacher or (Teacher & Parent) ). I think I should make and use some interfaces but I'm not sure how to do this right. Maybe like this: interface Role { } interface TeacherRole implements Role { void addGrade( Student student, Grade grade, [...] ); } class Teacher implements TeacherRole { private Person person; [...] } class User extends Person{ ArrayList<Role> roles = new ArrayList<>(); } Please if anyone could help me to make this right or maybe just point me to some literature/article that covers practical objects design.

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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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• What is the concept behind writing a cancel operation in c++?

  - by ToMan

  I'm attempting to write a cancel operation for a software download application. This application will first transfer the software to the device and then install the software on it. (These are givens I'm not allowed to change). What should the cancel operation do? When a user presses 'cancel', the application should stop transferring/installing the software immediately. Question: Since I've never written a "cancel" function, I'm wondering what are the types of things to consider when writing the code, and what are the common bugs I should expect and how to deal with them? Couldn't find anything in google so if you have some links that would be good reads I'd really appreciate it since I'm not looking for answers I'm just looking for guidelines/macro/concept help

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• Will I get penalised by google for overflow hidden? [duplicate]

  - by Rascal Capac

  This question already has an answer here: How bad is it to use display: none in CSS? 5 answers I have 2 divs next to each other, div A and div B. Div A displays a whole wordpress post and div B displays about 15 excerpts of posts with the same tag. To get this looking nice I set the hight of div B to be the same as the hight of div A with javaScript. This means alot of post excerpts will be hidden due to overflow hidden on div B. Will Google penalise me for this, and if so, how can I make this work and still please Google? Ps. I would gladly prevent the excerpts from being indexed but the main post must be indexed Ds.

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• Learning to program on punchcards

  - by Plutor

  I'd like to try programming with punch cards once in my life. How can I do this? I'm in my 30s, and grew up entirely in the PC era, programming on computers with screens and keyboards. I want to experience the way my father and grandfather used to work. I imagine the hardware (and probably the cards themselves) are no longer manufactured. Are there any universities or museums with functioning punch card readers anymore? I'm in Boston, but I'm willing to travel to do this. I asked MetaFilter, and I got some mixed answers (along with a lot of "no, don't do this" nay-saying). I did get a pointer to the Retro-Computing Society Of Rhode Island, but I haven't received a response to my email to them yet.

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• Enabling and Disabling components in Unity

  - by Blue

  I'm trying to create an enable/ disable game objects in Unity. I used GameObject.SetActiveRecursively but it only works one-way. I used a collider in which when an object enters the collider. The game objects become enabled. When they leave or get to a certain point, they disable. How would I make this a two way system, making it able to be enabled while inside the collider and disabled when outside the collider? -- The collider is in the game object who is being disabled and enabled. According to this information from Unity Answers, the object becomes disabled. So how would I make the object enabled?

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• Dual Screens not working nVidia

  - by user91396

  So I'm very much an Ubuntu noob, in fact I just install Ubuntu to my P.C. and I started it up with both my screens plugged into my nVidia's dvi and vga ports and logged in, change the skin to classic gnome, because that's how it was when I last used Ubuntu (8.1), and both screens were working separately. The trouble is that I got a notification saying there was nVidia drivers to be installed, so I install them and restart my P.C., as it told me to, and when I get back on only one of my screens is working and when I go into Displays (All Settings, Displays) it doesn't register my other screen at all, and it calls my working screen "Laptop". I've tried looking through several pages of Google but I see no answer. I did try to find the nvidia-settings to see if that had the answers but sadly I couldn't locate it. Thanks in advance for any help, but please remember, I am very new to Ubuntu.

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• Finding .desktop files based on their titles?

  - by stwissel

  That's part 2 of a question asked earlier (to be able to give credit to the answers individually). When I type into the Dash applications show up with their title (also when hovering over the launcher), how can I find the associated desktop file. When I look into the usual suspect locations (/usr/share/applications and ~/.local/share/applications) with Nautilus I see the titles, but not the file names (not even in properties which sucks). When I look from the command line I see the file names but not the titles (a switch would be nice). How can I get a listing (a custom column?) that shows them next to each other?

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• Is it necessary to understand what's happening at the hardware level to be a good programmer?

  - by bev

  I'm a self-taught programmer, just in case this question is answered in CS 101. I've learned and used lots of languages, mostly for my own personal use, but occasionally for professional stuff. It seems that I'm always running into the same wall when I run into trouble programming. For example, I just asked a question on another forum about how to handle a pointer-to-array that was returned by a function. Initially I'm thinking that I simply don't know the proper technique that the designers of C++ set up to handle the situation. But from the answers and discussions that follow I see that I don't really get what happens when something is 'returned'. How deep a level of understanding of the programming process must a good programmer achieve?

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• Adding tags for SEO in clothing website [duplicate]

  - by samyb8

  This question already has an answer here: What are the best ways to increase a site's position in Google? 18 answers I am building a site for a women's accessories brand. The site has a Homepage, a Store page (where all accessories are displayed), a page for each of the accessories description, an about page and a contact page. There is also a whole set up for shopping cart and checkout (irrelevant to this question). My issue is the SEO. Where can I put the keywords? The home page has only the menu and some photos. The store page displays the items and its titles. Then the specific item's page has a description of the item (pulled from the database), category and price. However, I feel like this is not enough for SEO for google ranking. Where could I add tags in this type of site?

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• What is an achievable way of setting content budgets (e.g. polygon count) for level content in a 3D title?

  - by MrCranky

  In answering this question for swquinn, the answer raised a more pertinent question that I'd like to hear answers to. I'll post our own strategy (promise I won't accept it as the answer), but I'd like to hear others. Specifically: how do you go about setting a sensible budget for your content team. Usually one of the very first questions asked in a development is: what's our polygon budget? Of course, these days it's rare that vertex/poly count alone is the limiting factor, instead shader complexity, fill-rate, lighting complexity, all come into play. What the content team want are some hard numbers / limits to work to such that they have a reasonable expectation that their content, once it actually gets into the engine, will not be too heavy. Given that 'it depends' isn't a particularly useful answer, I'd like to hear a strategy that allows me to give them workable limits without being a) misleading, or b) wrong.

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• Why does apt-get keep waiting for headers on Oracle repository?

  - by hughdbrown

  I have this at the end of my /etc/apt/sources.list to retrieve Oracle code: deb http://oss.oracle.com/debian unstable main non-free When I run sudo apt-get update, the app gets stuck displaying this message: 100% [Waiting for headers] If I remove this, apt-get update runs without error. Is there a new, recommended URL for Oracle products and, generally, how do you fix this problem? I am pretty sure this did not happen on 11.10 and has only started with the move to 12.04. I have seen these answers and they do not help: apt-get update stuck on "Waiting for Headers" http://ubuntuforums.org/showthread.php?t=1689579 http://muffinresearch.co.uk/archives/2010/03/30/linux-fix-for-apt-get-update-waiting-for-headers/ http://www.kubuntuforums.net/showthread.php?57567-Ubuntu-problems-on-update

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• After a domain change, what can I do to recover lost traffic, rankings, impressions etc? [duplicate]

  - by Felix

  This question already has an answer here: How do I rename a domain and preserve PageRank? 3 answers I moved my site to a legacy exact-match domain I purchased about a couple of months ago. I have seen significant reduction in traffic, impressions, and rankings. I did all the right steps/best practices: change of address in GWT, map old site hierarchy and match to new site for 301 redirects etc. Indexation has gone through the Google process: old site has all but dissappeared from he index and new site is indexed, albeit with some 404 errors which I am addressing. Does anyone else who has gone through eh domain change process have any thoughts/advice? Thanks!

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• Interest in Hadoop [on hold]

  - by pradeep

  I am a tech guy with around 7 yrs in IT and i basically work on LAMP technology. From past few months i have gained interest in hadoop. But i am confused on few points Is it worth investing time and money for learning hadoop? Is hadoop gonna stay for long or even big data concept gonna stay for long? Does learning and working hadoop take care of my compensation part? I have no idea about java. Is java a mandate for Hadoop. I have read answers where they say both.

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• Dash empy and blank Software Center

  - by fra_casula

  I've Ubuntu 12.10.1 LTS x62 fresh of installation... My dash is empty, search doesn't work and applications list is empty. If I run the Ubuntu Software Center it freeze in a blank screen. I tried with: restart reinstall of unity packages deleting ~/.local/share/zeitgeist folder other tricks found in the other askubuntu answers UPDATE: From ~/.xsession-errors I/O warning : failed to load external entity "/home/francesco/.compiz/session/10699c9c27649d05db134910329935534100000027470033" Initializing session options...done (compiz:2813): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed ** (zeitgeist-datahub:3070): WARNING **: zeitgeist-datahub.vala:227: Unable to get name "org.gnome.zeitgeist.datahub" on the bus! EDIT: Deleting .cache folder solves the Ubuntu Software Center blank screen issue, thanks to jokerdino!!

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• Upgraded to Ubuntu 12.04--keyboard & mouse no longer work--system down!

  - by Mackey Morgan

  I upgraded from Ubuntu 11 to 12.04, today, and everything seemed to go smoothly up to, and including the reboot. However, I now find that my mouse and keyboard no longer function, so I cannot login or otherwise use my computer. I have read other posts on this topic, but most of the answers seem to require the use of a keyboard to implement the solution--and I can't use my keyboard! I downloaded a 12.04 LiveCD and tried booting from it, but I have the same issue with that--no keyboard! My systems is a Lenovo with an AMD64 dual processor, and my keyboard and mouse are USB attached and shared with two other Windows PCs via a KVM switch (so I no the keyboard and mouse work!). I would appreciate some hints about how to make this PC usable, again. Thanks!

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• Ubuntu samba file and print server

  - by Gerd

  I am using an old Dell desktop PC as a samba file and print server for a Windows 7 network. The version of Unbuntu I am running is 12.04 which seems to big for the RAM and disk space I have available. Unbuntu 12.04 runs very very slow, the printing over the home network works at a quite acceptable speed. I have two problems: SLOW Ubuntu and I cannot update samba. The update manager tells me "update failed". So my two questions: Is there anything I can remove from the standard 12.04 installation to make Ubuntu run faster and should I uninstall and the reinstall samba to overcome the "update failed" problem? I hesitate, as printing and file serving works somehow and I don't want to loose that. I know I should give you more information to give me answers. But what would you need to know? I am not a natural Linux user. Windows 7 is still my home. Thanks in advance, Gerd

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• Good interview programming projects

  - by bigtang

  I'm looking for some small programming projects that I can give potential employees to gauge their programming abilities. These will be programmers straight out of college. I'm looking for projects that would take someone a couple of hours and they would email back their answers post-interview. One example would be to take this paragraph of text and return a list of alphabetized unique words. After each word tell me how many times the word appeared and in what sentance(s) the word appreared in. Anyone have any good suggestions?

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• How to enable home directory encryption for a particular user?

  - by Ivan

  I prefer to have a dedicated "administrator" user for technical purposes and that was one I've set up during installation. I've also refused to encrypt the home folder of the user. Now, as I've added a user account for my actual work usage I want my (but not the "administrator") home folder to be encrypted. How to turn this on? If it is not possible then how to enable encryption for all users home directories on a system already installed? I've found questions and answers about how to disable it but am not sure how to enable it.

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• Microsoft Offers Cheap Windows 8 Upgrade

  Though the software giant hasn't answered all of the questions, Computerworld collected many of them in one place and included the answers. You can also visit Microsoft's blog post for the details. Starting at general availability, if your PC is running Windows XP, Windows Vista, or Windows 7 you will qualify to download an upgrade to Windows 8 Pro for just $39.99 in 131 markets. And if you want, you can add Windows Media Center for free through the 'add features' option within Windows 8 Pro after your upgrade, the Microsoft blog post helpfully states. If you choose to upgrade, the Windows 8...

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