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• Entity Framework 4 - Generating Entities based on Views

  - by geekrutherford

  Just a quick post regarding a common issue and fix... When attempting to add a view as an entity to your model the EF generator may complain that it is unable to find or infer a primary key on your view. As a result, it will not add it to the model. The quick fix is to add the following to which ever column you wish to be the primary key within your view: ISNLL(TableA.ColumnA, -999) myPrimaryKeyColumnName Adding this will allow the EF generator to infer the primary key and add the view as an entity to your model.

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• Oneiric updates cause "Window Creation Error" in Second Life client

  - by Yuttadhammo

  With the latest Oneiric updates, I've been unable to use Second Life, a virtual reality simulator, in Ubuntu. I assume it has something to do with the NVidia driver, since the error in the console says: WARNING: createWindow: LLWindowManager::create() : Error creating window. WARNING: LLViewerWindow: Failed to create window, to be shutting Down, be sure your graphics driver is updated I guess I could file a bug on Launchpad, but I'm not sure where to file it. Does anyone have any insight into what may be causing this problem? It was working fine a week ago, and older viewers (Imprudence viewer anyway) still work fine.

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• ASUS Xonar DG not working Ubuntu

  - by thephpdev

  I've checked the "Questions that may already have your answer" to no avail. Basically, there is no sound at all, the snd_oxygen drivers are all being loaded. I can see the sound card and all of it's separate ports in Settings-Sound-Output, but nothing is coming out. I tried adjusting the volume in alsamixer, but for some reason the volume won't change (all that is there are some options [Speakers, Headphones, FP Headphones] and they change when I press the up/down arrow keys) at all. I have also tried many other terminal commands, such as reloading alsa and checking if the sound card is even being detected, which it is. I'm left clueless. It says on a bug report that this has been unassigned for over a year. Surely that's not right. Thanks in advance, Caelan.

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• Ubuntu for Internet radio

  - by user93100

  I am planning to set up a streaming server purely for internet radio using Icecast2. what software packages do i require during Ubuntu installation and any third party apps i may require. I am going to use BUTT(Broadcast using this tool) Encoder and would like to be able to run BUTT on any computer so that other people can broadcast to my server from anywhere. I am looking for tips or tutorials on how to achieve the above. I mainly need info on cofiguring Ubuntu Server and icecast2. Also GUI? if so what one. Preferablly lightweight. I am choosing Ubuntu for its level of security and reliability. I hope someone can help me as i plan to make this a community Radio station. Many Thanks Khz

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• Is there a foolproof and easy way of determining which debs meant for ubuntu will install on debian.

  - by tinhed

  I have used ubuntu for a lomg time, and have collected a lot of debian packages ( .debs) which i may need for some future installs. Most of these are grabbed from outdated or obsolete ppa's or from outside official sources. I have a old system lying around, too old to run ubuntu, and i am mulling installing debian squeeze+ lxde or something to convert it into a file+print server. I know it is possible to install debs meant for ubuntu on debian, while others will simply not install because of dependencies. Is there a easy way to install ubuntu debs on debian. How can i be sure which will safely install and which has the potential to break the sysem. Is there a script for this. Thanks in advance.

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• Is it viable to become a contract programmer straight out of college?

  - by M G

  I have a Bachelor of Science in Computer Science and four months research experience designing and implementing a research project. I realize this is highly dependent on my skill set - which includes C, C++, Java, Python, and SQL. I feel I have an advantage in two ways: I am young and am not afraid to work overtime. I am willing to take lower pay to gather a client base/experience, and work nights/weekends to get a few projects under my belt. This may be cliche, but I feel that I can learn new technologies quicker than most. At the very least, I am not a slow study. With this being said, is it viable for me to become a contract programmer? Or do I need the 10+ year skill set that most contractors bring to the table?

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• Examples of "hidden" humor in programming books? [closed]

  - by Maglob

  Every now and then while reading programming books, I find more a less hidden jokes, passage of texts written in witty, tongue-in-cheek fashion, right there in middle of more serious text. These make me giggle and I remember these for years :) Such as The Java Programming Language, documentation about currentTimeMillis(): "The time is returned in a long, so it will not overflow until the year 292280995, which should suffice for most purposes. More sophisticated applications may require the Date class." Common Lisp The Language, 2nd ed, in index: "kludges, 1-971" What good "hidden" jokes you have come across while reading programming books?

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• Managing large downloadable content on mobile devices

  - by larromba

  This is a general question of how to best manage large downloadable content on mobile devices. Lets consider a situation whereby a mobile app needs to download a number of very large content items, like HD videos, that are over 500MB but under 2GB. Now, lets assume this content delivery system should be scalable. Would it be a fair assumption that: A reputable cloud service would be needed - if so, what is a reliable and cost effective cloud service for mobile devices based on anyone's experience? Large content downloads should only be attempted over a wifi connection, so the end user doesn't incur large costs, e.g. when travelling. Downloads should carry on in the background if possible, as the user won't want to wait in an app for long periods. If the downloads don't finish, or the OS quits the app, all downloads should carry on when the app is next activated? Are there any other pitfalls anyone may have experienced when managing large content on mobile devices? Thanks.

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• Packaging an application written in C

  - by Jishnu

  I have an application written in C. What I have is a bunch of c files and some .h files. Also, I created a Makefile to do compilation. How can I compile this into a deb package. I searched google, and put everything into a "name_0.1.orig.tar.gz" file and created a folder named "name-0.1", then inside that folder, "dh_make" Skipping creating ../name_0.1.orig.tar.gz because it already exists Currently there is no top level Makefile. This may require additional tuning. Done. Please edit the files in the debian/ subdirectory now. You should also check that the name Makefiles install into $DESTDIR and not in / . I have a Makefile in name.tar.gz, why it is not recognizing ?

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• Javascript frameworks for large development teams

  - by pllee

  My company is reevaluating what kind of web framework we want to use. We are currently using the Ext 4.0 framework but there are questions being raised that it may not be the right framework to use. I like what Ext has to offer (rich GUIs, data package and class system) are there other frameworks out there that are similar? Are there frameworks out there tailored to medium/large software companies? Info: Potentially 100's of developers converting thick client screens to the web. Data modeling is important and well as rich GUI support. Maintainability and uniformity across multiple products important as well. Any info is greatly appreciated.

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• How to Install Xampp on Windows XP

  To begin, visit the XAMPP for Windows home page, located at: http://www.apachefriends.org/en/xampp-windows.html. You will have several options for which flavor of XAMPP you wish to install, including the Installer, Zip, and 7zip versions. For simplicity's sake, this tutorial will use the simplest method: the installer. Click on the Installer link and you will be redirected to the program's SourceForge page. You may get a pop-up like the one below; if so, click Run: Next, you will be prompted to choose an installation language. Choose English (or whichever language you wish) and click the quo...

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• How to Stop Browser from rejecting my downloads

  - by melki0795

  I have a portfolio site where I am trying to host some of my work, so people can download my work. Some of these files include exe executables, and some are jar executables, which are run through batch. When a user tries to download my apps, it says that the file is not commonly downloaded and may be harmful, and therefore blocks the download. If I zip the folders, it still does the same thing. Any format i choose, still blocks the downloads. How can I stop chrome from doing this. Is there a way I can verify my files so they will be considered as trusted? Thanks in advance!

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• Is there a formal name for gradually initiating software changes?

  - by g .

  At times when we develop new features or functionality, we gradually "turn it on" to ensure a smooth transition and minimal impact for users. Instead of one big sudden change, we are able to control with the configuration aspects of the functionality that make it more or less intrusive to the user. This is all done in the same release/version of the software, so no software development changes are required (unless bugs turn up that need to be fixed). For example, initially we may only perform logging or analysis of data without acting upon it. Or we make something optional for a period of time before it becomes compulsory. The idea is that this reduces the potential for problems either on the technical side as well as unexpected changes by the user. The question is, is there a formal name for this approach?

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• sudo command and how to auto get password

  - by user108988

  I got a problem that: I have a file .sh #!/bin/bash var=$(zenity --forms --title="T?t gi? v? yêu nhé" \ --text="V? mu?n t?t máy sau bao nhiêu phút n?a" \ --separator="," \ --add-entry="V? di?n s? vào dây") case $? in 0) sudo shutdown -h $var ;; 1) exit 0;; -1) echo "An unexpected error has occurred." ;; esac How can sudo command autofill the password from echo command or a file. I read about sudo -S options, but i dont know how it works. Anyone can give an example about it! Thanks guys

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• How is this "interface"-like structure/pattern called?

  - by Sebastian Negraszus

  Let's assume we have an XmlDoc class that contains basic functionality for dealing with an XML data structure and saving/loading data to/from a file. Now we have several subclasses, A, B and C. They all inherit from XmlDoc and add component-specific methods for setting and getting lots of data. They are like "interfaces" but also add an implementation for the signatures. Finally, we have an ABCDoc class that joins all the "interfaces" via virtual multiple inheritence and adds some ABCDoc-specific stuff, such as using XMLDoc-methods to set an appropriate doc type. We may also have an ADoc class for only saving A data. How is this pattern called? "Interface" is not really the right word since interfaces usually do not contain an implementation. Bonus points for C++ code conventions.

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• How to interview for a developer position [closed]

  - by Brandon Moore

  I know this question may not seem to fit the format of this site perfectly, but I think it's definitely the right place to ask it from the perspective of getting the information I'm looking for (and I'm sure many others are wanting to know). I would like to hear from some people who feel they've become adept at interviewing developers. What's the secret to making sure you hire someone whose work actually looks as good as their resume? Please try to keep your answers concise. I understand this question has multiple answers and that's why it doesn't fit the format of this site well. So at least refrain from offering your opinions. Just offer any advice you've actually tried and have found to work well for you. And no linking to other resources. Only looking for personal experience.

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• Can't connect to wireless without typing sudo modprobe b43 in terminal

  - by user90889

  I just upgraded to 12.04 on an old ACER Travelmate 5320 using Broadcom 4311. I wasn't able to connect to the internet through the wireless for a few days. It didn't even display wireless networks. I was finally able to make it work by following the instructions found here: http://linuxwireless.org/en/users/Drivers/b43#supported However, each time I log on to the computer I have to go to the terminal and type sudo modprobe b43 to make the wireless work. Is there somehow I can avoid this? I have used Ubuntu for many years but always relied on other people to help me with the technical stuff. The terminal is alien to me so I literally follow online forum instructions without knowing what I'm doing. Also, I tried many many things before I managed to make it work. So I'm worried I may have installed something that now conflicts with whatever the sudo modprobe b43 does. Thank you

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• Question about whether I should pursue minors or work towards a masters [closed]

  - by user75493

  I'm a sophomore about to go into my Spring semester in a few weeks and I am trying to decide some major things that will affect the next few years of my life and was looking for some guidance/advice. I'm currently working towards a Bachelors in Computer Science and my question was whether I should minor in Corporate Strategy and Math or just work towards a Masters in Computer Science? I was wondering if employers are more looking for Masters degrees in Computer Science or if those minors could be beneficial to me. Some things that may affect responses: I already have all my other requirements filled for graduating except my Computer Science classes, I've already had an internship this past summer and am already hearing back from several companies about internships for this upcoming summer. Thanks in advance! - Alex

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• Developing applications for iPhone, BlackBerry and J2ME in ASP.Net

  Hi, I would like to introduce you a new mobile application framework iPFaces for developing native, form-oriented applications. The aim of the solution is to screen the programmer completely out from the mobile platform itself, and transfer the entire application logic to the central application server level. Developers with experience with one of the supported Web technologies (ASP.Net, Java, and PHP) may start working with iPFaces virtually immediately. For more information, see the project...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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• Massive vehicular network simulator

  - by IvanK

  I am interested in making a vehicular network simulator (vehicular network as in vehicles can be equipped with radios and when they come in range they can talk with each other). I want to be able to scale to 1000s of nodes if not more. I am quite frankly torn on how to do, or even which language to use or whether I should instead be using some other piece of software/code. I know that this should depend on a lot of design decisions that I may have, but it would be great if somebody can point me towards the right direction. I was planning to use a multi-threaded architecture, but not sure whether it will add to the complication or make it easier. Also if I go for a multi-threaded architecutre, do you think that 'Go' language will be a good choice?

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• Global Adopt a JSR Program Update

  - by heathervc

  The Global Adopt a JSR program, combining efforts of SouJava and London Java Community,  is an excellent place to get some Java User Group (JUG) resources for JSRs.  It also has the potential to act as an extra set of eyes, ears and volunteers for JSRs. The Global project to go to is at: http://adoptajsr.java.net.  The wiki page explaining the whole program and benefits to Spec Leads and EG's can be found there, including: The mailing list: [email protected] . Portugese speakers-mainly Brazlian JUG members-have their own mailing list and more language lists may be added as required. The IRC channel is at adoptajsr on irc.freenode.net Also check out this InfoQ article with Martijn Verburg about the London Java user group, the Adopt a JSR program, the JCP and Oracle’s handling of the Java community.

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• What's the difference between "Service" and "/etc/init.d/"?

  - by Marco Ceppi

  I've been managing server installations both on and off Ubuntu flavor for some time - I've become quite adjusted to /etc/init.d/ for restarting servcies. Now I get this message: root@tatooine:~# /etc/init.d/mysql status Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service mysql status Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the status(8) utility, e.g. status mysql mysql start/running, process 14048 This seems to have been brought about in the latest LTS of Ubuntu - why? What's so bad about /etc/init.d/ and what/is there a difference between service and /etc/init.d/?

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• Move site to new domain divided by language across subdomains

  - by mark

  I managed to find a nice domain for a fairly fledgling site of mine that actually hasn't been parked by scumbag squatters. Given the upcoming move I'm thinking I'd take the opportunity to split the content across subdomains according to language, much like wikipedia for example: current: www.old-domain.com/en/subject # English www.old-domain.com/subjecto # Spanish (default so not locale in url) proposed en.new-domain.com/subject es.new-domain.com/subjecto The advantage of doing this is a fairly competitive keyword such that I may wish to put a copy of my application on a Spanish slice in order to gain a few serp's. Also pure vanity. Google's webmaster tools allows me to move to the new domain and I can add the root domain and the subdomains but forward to only one. I'll 301 from the old domain appropriately but is there anything I should know about webmaster tools in this respect where effectively I'm moving to two addresses? (Feel free to dissuade me from doing this if it's a bad idea in comments.) I've now asked this same question on google's forums.

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• How to display time in the top panel?

  - by Mörre

  I thought I already had the time up there in the top bar, and it may have been so in previous Ubuntu versions (don't remember, my Ubuntu laptop is just one of three computers I use). Only that I just noticed - me being someone who never wears a watch, has the cellphone turned off 95% of the time and relying on the computer to tell the time - that there is no time being displayed anywhere, and I had expected it in the top bar on the Unity desktop. I searched around but found no obvious solution, but I'm sure someone immediately knows how I can get my time (back?) into the top bar?

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• Unity Launcher missing and Terminal shortcut stopped working

  - by Diana

  When I restarted my Ubuntu after it being updated, I found the Unity launch bar was gone. I tried looking up several solutions online, blindly typing in the commands that others suggested, and I found after the umpteenth time rebooting after typing in another foreign command, I found I couldn't even open up the terminal with the Ctrl+Alt+t shortcut either and I have no idea how to fix this. This was the last set of instructions I remember following before terminal stopped opening. Install CCSM sudo apt-get install compizconfig-settings-manager And then run it in terminal (Ctrl+Alt+t) ccsm Then search for "Ubuntu Unity Plugin". If it's not checked, check it. If it is checked you may have another issue. Try restarting compiz: kill -9pidof compiz` This will kill it, it should start up again, if it doesn't, CTRL+ALT+F2 and then type: sudo service lightdm restart to restart the window manager. Go back to the terminal and run: unity --reset

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