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• Need Help Hiring a Perfectionist Programmer [closed]

  - by Bryan Hadaway

  I understand my question may be in the gray area, but I'm not able to use the Meta to ask if this question is appropriate or not so I'll simply have to risk it. My project is complete in the sense that it's a fully functional, ready to go 1.0 version. However, that's not good enough for my standards. My expertise is in HTML/CSS, not jQuery and PHP. I'm looking for someone to refine every character of my code for quality, speed, security and compatibility. I want everything to be as bug free as possible for launch. So I need an expert programmer who's a perfectionist in their coding who cares about the quality of their work (not just making it work) to review and refine my code. I'm sure I can't outright post the project's details and hope for interested parties to contact me as that wouldn't be beneficial to the community so instead I'm looking for advice from programmers about where some of best places to hire quality programmers are and the best strategies to hire the right programmer. In other words, screening applicants off of craigslist isn't going to cut it for this project. Thanks

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• Nvidia GeForce Gt-520M-cn on intel dh61ww Ubuntu 12.04

  - by j goseeped

  hi people i hope you can help a little bit , i appreciate your time look: i have a this desktop i7 2600, 8gb ram ddr3, board intel dh61ww, Geforce Nvidia GT520-cn 2Gb ddr3, i just install ubuntu 64bits 12.04 kernel 3.2.0-23-generic , i want to setup two monitors samsung led 22" and get start mi video card 1) i download and installed nvidia driver 295.59 and also try with 302.17 to apt-update and upgrade, apt-get install build-essential linux-headers-$(uname -r), apt-get remove --purge nvidia*, apt-get remove --purge xserver-xorg-video-nouveau, vim /etc/modprobe.d/blacklist.conf blacklist vga16fb blacklist nouveau blacklist rivafb blacklist nvidiafb blacklist rivatv sh NVIDIA.run, sudo service lightdm start, reboot, nvidia-xorgconf 2)after reboot i get 800x600 and nvidia-settings say this. You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run nvidia-xconfig as root), and restart the X server. 3) i change a little bit xorg.conf to set up a resolution to work property 4) i dont have any image in the monito and i dont have any option on Nvidia X server settings lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 520] (rev a1) egrep -i 'glx|nvidia' /var/log/Xorg.0.log [ 12.005] (II) LoadModule: "glx" [ 12.005] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so [ 12.575] (II) Module glx: vendor="NVIDIA Corporation" [ 12.585] (II) NVIDIA GLX Module 302.17 Tue Jun 12 16:22:45 PDT 2012 [ 12.585] (II) Loading extension GLX [ 13.037] (EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found) [ 13.044] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=3 (/dev/input/event10) [ 13.044] (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=7 (/dev/input/event9) glxinfo | grep direct Xlib: extension "GLX" missing on display ":0.0". Error: couldn't find RGB GLX visual or fbconfig sorry my english is no very well. and thanks guys

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• C++ Succinctly now available!

  - by Michael B. McLaughlin

  Over the summer I worked with SyncFusion to create an eBook based off of my C# to C++ guide for their free Succinctly Series of eBooks. Today the result, C++ Succinctly, was published for download. It is a free (registration required; they make tools and libraries for .NET development so you might get an occasional email from them – I’ve been signed up for a few months and have had maybe 3 emails total so it’s not horrible super spam or anything ) and you can download it as a PDF or a Kindle .MOBI file (or both). I’m excited with how it turned out and enjoyed working with the people at SyncFusion. The book contains a total of 20 code samples, which you can download from BitBucket (there’s a link very early in the book). Almost all of the code is also inline in the book itself so that you don’t need to worry about flipping back and forth between your dev machine and your eReader (but if you want to try to understand a concept better, you can easily download the code, open it up in VS 2012, and play around with it to see what happens when you tinker with things). The code does require Visual Studio 2012 because of its expanded support for C++11 features and since I wrote all of the samples as Console programs for clarity and compactness, you will need a version that supports C++ desktop development (currently VS 2012 Pro, Premium, or Ultimate). Sometime this Fall, Microsoft will be releasing Visual Studio 2012 Express for Windows Desktop which should provide a free way to use the samples. That said, I tested all of the samples with MinGW and only the StorageDurationSample will not compile with it due to the thread-local storage code. If you comment that out then you can compile and run all the samples with MinGW (or using a recent version of GCC in a GNU/Linux environment, or any other C++ compiler that provides the same level of C++11 support that Visual Studio 2012 does). I hope it proves helpful to those of you who choose to check it out!

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• Graphical Interface and Object Selection/Manipulation

  - by ToriArendt

  I have a project I want to try to implement, but I'm kind of stuck on how to get started. I know there are probably a lot of resources that I can look at, but I'm really just stuck on what to even search for and where to begin. Basically, I have a program written in Java that separates 3D coordinates from a 3D reconstructed model into different objects. I then want to be able to perform a logistic regression on these objects to determine if they are type A or type B. But first, I need to classify a training set of objects as type A or B by hand. I don't know ANYTHING about graphing or user interfaces in Java, so I have been plotting the coordinates of a given object in MATLAB so that I can visualize the object and assign it a type. Now, as I am trying to make this program more "user friendly" I want to create an interface in Java where I can simply graph all the coordinates of the objects from the entire 3D model (on the same graph). I then want to be able to click on the each object and assign it to be either of type A or type B. I hope this description makes sense and someone can point me in the direction of something that will help me. I'm sorry if some of this terminology is off; I'm a bit new to software development. P.S. If anyone also has some tips on implementing logistic regression in Java, I'm sure I'll need them down the road :).

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• Mozilla Persona to the login rescue?

  - by Matt Watson

  A lot of website now allow us to login or create accounts via OAuth or OpenID. We can use our Facebook, Twitter, Google, Windows Live account and others. The problem with a lot of these is we have to have allow the websites to then have access to our account and profile data that they shouldn't really have. Below is a Twitter authorization screen for example when signing in via Technorati. Now Technorati can follow new people, update my profile and post tweets? All I wanted to do was login to Technorati.com to comment on a post!Mozilla has just released their new solution for this called Persona. First thought is oh great another solution! But they are actually providing something a little different and better. It is based on an email address and isn't linked to anything like our personal social networks or their information. Persona only exists to help with logging in to websites. No loose strings attached.Persona is based on a new standard called BrowserID and you can read more about it here:How BrowserID Works.  The goal is to integrate BrowserID in to the browser at a deeper level so no password entry is required at all. You can tell your web browser to just auto sign in for you. I am really hoping this takes off and will look at implementing it in current projects! I would recommend researching it and lets hope it or something like it becomes a wide spread reality in the future.

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• Creating Engaging Online Experiences is Easy and Intuitive for Marketers with Oracle WebCenter Sites 11g

  - by Christie Flanagan

  Last month, we announced the availability of Oracle WebCenter Sites 11g, the latest release of our web experience management solution. This new release is really geared toward enabling marketers and business users to drive customer acquisition and brand loyalty by simplifying the whole process of creating, managing and optimizing engaging online experiences.  To show you just how this works, we’ve created the video below which takes you through the tasks a typical marketer might execute using Oracle WebCenter Sites to manage their online presence -- everything from page editing to page creation, right on through to optimizing the mobile experience and moderating user-generated comments and reviews is covered here. I hope this video has give you a flavor for just how easy and intuitive it is for marketers and other business users to manage engaging and interactive online experiences using Oracle WebCenter Sites.  To see more about the new release, please check out the recording of our launch webcast. On Demand Webcast - Introducing Oracle WebCenter Sites: Transforming the Online Experience Enabling marketers and business users is a key requirement for creating and managing contextually relevant, social, and interactive online experiences. Oracle WebCenter Sites transforms the online experience into one that is simple and intuitive to manage as a content contributor, encourages interaction between site visitors and their social networks, and provides marketers with automated targeting options for optimizing online engagement. View this webcast now to learn more.

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• Dynamic (C# 4.0) &amp; Var in a nutshell.

  - by mbcrump

  A Var is static typed - the compiler and runtime know the type. This can be used to save some keystrokes. The following are identical. Code Snippet var mike = "var demo"; Console.WriteLine(mike.GetType());  //Returns System.String   string mike2 = "string Demo"; Console.WriteLine(mike2.GetType()); //Returns System.String A dynamic behaves like an object, but with dynamic dispatch. The compiler doesn’t know anything about it at compile time. Code Snippet dynamic duo = "dynamic duo"; Console.WriteLine(duo.GetType()); //System.String //duo.BlowUp(); //A dynamic type does not know if this exist until run-time. Console.ReadLine(); To further illustrate this point, the dynamic type called “duo” calls a method that does not exist called BlowUp(). As you can see from the screenshot below, the compiler is reporting no errors even though BlowUp() does not exist. The program will compile fine. It will however throw a runtimebinder exception after it hits that line of code in runtime. Let’s try the same thing with a Var. This time, we get a compiler error that says BlowUp() does not exist. This program will not compile until we add a BlowUp() method.  I hope this helps with your understand of the two. If not, then drop me a line and I’ll be glad to answer it.

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• Boot process enter an infinite loop after installing Ubuntu 11.04 together with Windos 7 and XP

  - by Andreafc

  I have a new computer ACER Aspire X3960 which came with Widows 7 preinstalled. I made a new partition where I installed Windows XP and then I installed in new logical partitions (a Swap, a / and a /home partition) Ubuntu 11.04. At the end of the process, the computer enters the very first screen where it says "press DEL to enter BIOS setup, press F12 to enter BOOT options". After a few seconds, the screen goes blank, the computer beeps and then it presents the same screen again. It doesn't even ever go to the grub options of which operating system I want to start. It just loops there forever. I tried to fix the (eventually damaged) grub following these instructions (unfortunately in german) http://wiki.ubuntuusers.de/GRUB_2/Reparatur from a LiveUSB, which I'm also using to post this question. Now I found here that someone asked for the results of the Boot Info Script. Here are mine (I hope I did right in trying to upload the file): http://paste.ubuntu.com/736032/ Can anybody help? Thank you very much. Andreafc

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• I am not the most logically-organized person. Do I have any chance at being a good 'low-level' programmer?

  - by user217902

  Background: I am entering college next year. I really enjoy making stuff and solving logical problems, so I'm thinking of majoring in compsci and working in software development. I hope to have the kind of job where I can work with implementing / improving algorithms and data structures on a regular basis.. as opposed to, say, a job that's purely concerned with mashing different libraries together, or 'finding the right APIs for the job'. (Hence the word 'low-level' in the title. No, I don't wish to write assembly all day.) Thing is, I've never been the most logically-sharp person. Thus far I have only worked on hobby projects, but I find that I make the silliest of errors ever so often, and it can take me ages to find it. Like anywhere between three hours to a day to locate a simple segfault, off-by-one error, or other logical mistake. (Of course, I do other things in the meantime, like browsing SO, reddit, and the like..) It's not like I'm 'new' to programming either; I first tried C++ maybe five years ago. My question is: is this normal? Should a programmer with any talent solve it in less time? Having read Spolsky's Smart and gets things done, where he talks about the large variance in programming speed, am I near the bottom of the curve, and therefore destined to work in companies that cannot afford to hire quality programmers? I'd like to think that conceptually I'm okay -- I can grasp algorithms and concepts pretty well, I do fine in math and science, although I probably drop signs in my equations more often than the next guy. Still, grokking concepts makes me happy, and is the reason why I want to work with algorithms. I'm hoping to hear from those of you with real-world programming experience. TL;DR: I make many careless mistakes, should I not consider programming as a career?

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• JSR Updates and EC Meeting Tuesday @ 15:00 PST

  - by Heather VanCura

  JSR 310, Date and Time API, has moved to JCP 2.9 (first JCP 2.9 JSR!) JSR 236, Concurrency Utilities for Java EE, has published an Early Draft Review. This review ends 15 December 2012.  Tomorrow, Tuesday 20 November is the last Public EC Meeting of 2012, and the first EC meeting with the merged EC. The second hour of this meeting will be open to the public at 3:00 PM PST. The agenda includes  JSR 355,  EC merge implementation report, JSR 358 (JCP.next.3) status report, JCP 2.8 status update and community audit program.  Details are below. We hope you will join us, but if you cannot attend, not to worry--the recording and materials will also be public on the JCP.org multimedia page. Meeting details Date & Time Tuesday November 20, 2012, 3:00 - 4:00 pm PST Location Teleconference Dial-in +1 (866) 682-4770 (US) Conference code: 627-9803 Security code: 52732 ("JCPEC" on your phone handset) For global access numbers see http://www.intercall.com/oracle/access_numbers.htm Or +1 (408) 774-4073 WebEx Browse for the meeting from https://jcp.webex.com No registration required (enter your name and email address) Password: JCPEC Agenda JSR 355 (the EC merge) implementation report JSR 358 (JCP.next.3) status report 2.8 status update and community audit program Discussion/Q&A Note The call will be recorded and the recording published on jcp.org, so those who are unable to join in real-time will still be able to participate.

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• Installing Django on Windows

  - by Pranav

  Ever needed to install Django in a Microsoft Windows environment, here is a quick start guide to make that happen: Read through the official Django installation documentation, it might just save you a world of hut down the road. Download Python for your version of Windows. Install Python, my preference here is to put it into the Program Files folder under a folder named Python<Version> Add your chosen Python installation path into your Windows path environment variable. This is an optional step, however it allows you to just type python in the command line and have it fire up the Python interpreter. An easy way of adding it is going into Control Panel, System and into the Environment Variables section. Download Django, you can either download a compressed file or if you’re comfortable with using version control – check it out from the Django Subversion repository. Create a folder named django under your <Python installation directory>\Lib\site-packages\ folder. Using my example above that would have been C:\Program Files\Python25\Lib\site-packages\. If you chose to download the compressed file, open it and extract the contents of the django folder into your newly created folder. If you’d prefer to check it out from Subversion, the normal check out points are http://code.djangoproject.com/svn/django/trunk/ for the latest development copy or a named release which you’ll find under http://code.djangoproject.com/svn/django/tags/releases/. Done, you now have a working Django installation on Windows. At this point, it’d be pertinent to confirm that everything is working properly, which you can do by following the first Django tutorial. The tutorial will make mention of django-admin.py, which is a utility which offers some basic functionality to get you off the ground. The file is located in the bin folder under your Django installation directory. When you need to use it, you can either type in the full path to it or simply add that file path into your environment variables as well. Hope this helps!

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• How to switch off? [closed]

  - by Xophmeister

  While I've programmed software for many years, I've only recently started doing so professionally and have noticed a bit of a problematic pattern. I hope this is the best place to pose such a question, as I am interested in others' experiences and solutions... Writing software is, by its nature, a cerebral exercise. When coding for my own sake, I would do so until I was satisfied; even if that meant going all night. Now I'm coding in exchange for goods and services, on projects that are inherently uninteresting to me, I want to 'switch off' when it's time to go home. Maybe you consider that to be a 'bad attitude', but I just don't feel that whatever I'm working on is worth caring about after-hours. Besides, my employer doesn't exactly have the infrastructure required to make out-of-office changes; I can't just clone a repo and even remote login is a PITA. Anyway, the problem I'm experiencing is that, while I'm not particularly overworked or stressed, if I'm faced with a problem, my brain will work on a solution. Generally, it won't give up. Hence I can't switch off and, sometimes, the problem or the solution is significant enough that it disrupts my sleep. While, paradoxically, this doesn't seem to affect my coding ability, it can have a profound impact of the rest of my life. I get increasingly low as I get tired. So far, the best solutions I've found are writing little notes on the matter (and, say, e-mailing them back to my work address) and exercise. Neither of these can switch me off entirely and, as the week progresses, exercise especially becomes untenable due to tiredness. TL;DR How can you stop from being a coding zombie?

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• Copy Ubuntu distro with all settings from one computer to a different one

  - by theFisher86

  I'd like to copy my exact setup from my computer at work to my computer at home. I'm trying to figure out how to go about doing that. So far I've figured this much out. On the source computer run dpkg --get-selections > installed-software and backup the installed-software file Backup /etc/apt/sources.list Backup /usr/share/applications/ to save all my custom Quicklists Backup /etc/fstab to save all my network mounts Backup /usr/share/themes/ to save the customization I've done to my themes I'm also going to backup my entire HOME directory. Once I get to the destination computer I'm going to first do just a fresh install of 11.10 Then I'll copy over my HOME directory, /etc/apt/sources.list, /usr/share/appications, /etc/fstab and /usr/share/themes/ Then I'm going to run dpkg --set-selections < installed-software Followed by dselect That should install all of my apps for me. I'm wondering if there's a way/need to backup dconf and gconf settings from the source computer? I guess that's my ultimate question. I'd also like any notes on anything else that might need backed up as well before I undertake this project. I hope this post is legit, I figured other people would be interested in knowing this process and I don't see any other questions that seem to really document this on here. I'd also like to further this project and have each computer routinely backup all the necessary files so that both computer are basically identical at all times. That's stage 2 though...

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• How much information can you mine out of a name?

  - by Finglas Fjorn

  While not directly related to programming, I figured that the programmers on here would be just as curious as I was about this question. Feel free to close the question if it does not meet with the guidelines. A name: first, possibly a middle, and surname. I'm curious about how much information you can mine out of a name, using publicly available datasets. I know that you can get the following with anywhere between a low-high probability (depending on the input) using US census data: 1) Gender. 2) Race. Facebook for instance, used exactly that to find out, with a decent level of accuracy, the racial distribution of users of their site (https://www.facebook.com/note.php?note_id=205925658858). What else can be mined? I'm not looking for anything specific, this is a very open-ended question to assuage my curiousity. My examples are US specific, so we'll assume that the name is the name of someone located in the US; but, if someone knows of publicly available datasets for other countries, I'm more than open to them too. I hope this is an interesting question!

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• Engineered Systems and PCI

  - by Joel Weise

  Oracle has a number of different engineered systems.  These are design to be highly integrated, optimized and secure systems.  The Exadata database engineered system and the Exalogic application engineered system are two good examples.  Often I am asked how these comply with different standards and regulations.  Exalogic is the Oracle engineered system that supports applications and the focus of today's blog.  First, we must recognize that as a collection of hardware and software, we cannot simply state that Exalogic is "compliant" with PCI DSS.  This is because Exalogic must be implemented within the context of one's existing IT infrastructure, the security features of that infrastructure, the governance framework that exists, security policies, operational procedures, and other factors.  What we can say though, is that Exalogic has been designed with various security capabilities that can be utilized to support compliance to PCI DSS as well as other standards and regulations (e.g., NIST and HIPAA).  Given that, Exalogic can be an excellant platform for running PCI related payment applications.  Coalfire Systems, a leading QSA in the US, has evaluated Exalogic against PCI DSS and supports this position.  Their evaluation can be found here: Exalogic and PCI Compliance. I hope you find it useful. 

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• issues with ASUS S301L ultrabooks

  - by Wuerze

  I just like to tell you what still is a Problem in Ubuntu 14.04 and should be solved for a nice experience of this distribution. Unfortunately I do not have any hints to tell you, because I am just a user and know not much about programming. Anyway, I hope it helps. 1) Intel open source Graphics issues (proprietary) -when attaching HDMI-cable the screen switches to the external monitor and it's fine, but there is no switching back unless restart with HDMI deattached -black screen appears for like 2 seconds as if I would change screen in the settings; frequency increases with intensity of driver use (i.e. videos or video games) 2) hotkeys (commonly recognised) -there is no possibility to adjust brightness with the hotkeys (Fn+F5 and Fn+F6) 3) touchscreen (commonly recognised) -the touchscreen is behaving like a mouse -configuring gestures for the multi touch screen seems to always end in disabling touch pad gestures 4) panel symbols -battery symbol has got a low accuracy while it determines accurately the energy left; only 5 steps of energy are shown by the symbol Thank you all for participating in the solution of these problems! I will stay tuned and edit this list if something has been solved.

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• Design help with parallel process

  - by brazc0re

  I am re-factoring some code and an having an issue with retrieving data from two parallel processes. I have an application that sends packets back and forth via different mediums (ex: RS232, TCP/IP, etc). The jist if of this question is that there are two parallel processes going on. I hope the picture below displays what is going on better than I can word it: SetupRS232() class creates a new instance of the SerialPort by: SerialPort serialPort = new SerialPort(); My question is, what is the best way that the Communicator() class, which sends out the packet via the respective medium, get access to the SerialPort object from the SetupRS232 class? I can do it with a Singleton but have heard that they are generally not the best design to go by. I am trying to follow SRP but I do feel like I am doing something wrong here. Communicator() will need to go out of it's way to get access to SetupRS232() to get access to the SerialPort class. I actually haven't found a way to even get access to it. Would designing each medium class, for example, SetupRS232(), SetupTCPIP, as a singleton be the best way to approach this problem?

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• Useful WatiN Extension Methods

  - by Steve Wilkes

  I've been doing a fair amount of UI testing using WatiN recently – here’s some extension methods I've found useful. This checks if a WatiN TextField is actually a hidden field. WatiN makes no distinction between text and hidden inputs, so this can come in handy if you render an input sometimes as hidden and sometimes as a visible text field. Note that this doesn't check if an input is visible (I've got another extension method for that in a moment), it checks if it’s hidden. public static bool IsHiddenField(this TextField textField) { if (textField == null || !textField.Exists) { return false; } var textFieldType = textField.GetAttributeValue("type"); return (textFieldType != null) && textFieldType.ToLowerInvariant() == "hidden"; } The next method quickly sets the value of a text field to a given string. By default WatiN types the text you give it into a text field one character at a time which can be necessary if you have behaviour you want to test which is triggered by individual key presses, but which most of time is just painfully slow; this method dumps the text in in one go. Note that if it's not a hidden field then it gives it focus first; this helps trigger validation once the value has been set and focus moves elsewhere. public static void SetText(this TextField textField, string value) { if ((textField == null) || !textField.Exists) { return; } if (!textField.IsHiddenField()) { textField.Focus(); } textField.Value = value; } Finally, here's a method which checks if an Element is currently visible. It does so by walking up the DOM and checking for a Style.Display of 'none' on any element between the one on which the method is invoked, and any of its ancestors. public static bool IsElementVisible(this Element element) { if ((element == null) || !element.Exists) { return false; } while ((element != null) && element.Exists) { if (element.Style.Display.ToLowerInvariant().Contains("none")) { return false; } element = element.Parent; } return true; } Hope they come in handy

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• Oracle MDM Panel at OOW 12: Best practices, Lessons Learned and More...

  - by Mala Narasimharajan

  By Narayana Machiraju  We are less than two weeks out from the start of Oracle Open World 2012. The MDM team has built-up a solid line-up of product and customer sessions for you to attend this year in addition to the hands-on labs, and numerous demonstration pods in Moscone West. This year we will be hosting a customer panel session dedicated to Oracle Customer Hub at Oracle Open World. An esteemed panel of Oracle Customer Hub customers in different Industries: Credit Suisse, Allianz and Elsevier will provide insight into the journey of Customer MDM right from building a business case and MDM vision, establishing and sustaining governance, implementation strategies and realizing the benefits. You will also hear about implementation challenges, phasing strategies and lessons learned from real-life experiences. If you are already implementing Customer MDM or evaluating the benefits of MDM and you would like to hear directly from our customers then I highly recommend you attend this session: Customer MDM Panel: Discussion and Q&A on Implementation Best Practices, Data Quality, Data Governance          and ROI Wednesday October, 3rd, 5:00PM - 6:00PM Westin Market Street Hotel - Metropolitan 1 The MDM track at Oracle Open World covers variety of topics related to MDM. In addition to the product management team presenting product updates and roadmap, we have several customer panels, Conference sessions and Customer round table sessions featuring a lot of marquee Customers. You can see an overview of MDM sessions here.  We hope to see you at Open World and stay in touch via our future blogs.

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• Problems after installing a plethora of updates

  - by box

  yesterday I decided to install 32-bit Ubuntu on my 64-bit desktop, first of all, is that a problem? After installing, i had around 270 updates to install, according to the update manager. I was having trouble launching a game with WINE, so I thought updating might help. After updating, I restarted my computer, and after a long while it showed me my desktop and the icon's on it, but I didn't get anything else. I didn't have the "taskbar" (not sure what it's called, sue me) on the left side, nor the bar at the top. I also received an error message saying some program had stopped working. I decided to restart my computer again, and that was when it told me that i have to re-configure my drivers, or run in "Low Graphics" mode for one session, amongst other options. Well, I decided to try to revert to the "basic video drivers", which was an option it gave. Restarting the computer gave me the same problem as in the second paragraph. After a few more restarts and a night of restless sleep, here I am trying to start my computer again, only to receive a black screen, and my monitor "going to sleep". I'm sort of stumped here, being new to Ubuntu (desktop, at least) and I really hope this gets fixed without me having to install Ubuntu on yet another partition (I have three other partitions for various things already) tl;dr: Black screen on boot after installing updates.

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• How do I interpolate air drag with a variable time step?

  - by Valentin Krummenacher

  So I have a little game which works with small steps, however those steps vary in time, so for example I sometimes have 10 Steps/second and then I have 20 Steps/second. This changes automatically depending on how many steps the user's computer can take. To avoid inaccurate positioning of the game's player object I use y=v0*dt+g*dt^2/2 to determine my objects y-position, where dt is the time since the last step, v0 is the velocity of my object in the beginning of my step and g is the gravity. To calculate the velocity in the end of a step I use v=v0+g*dt what also gives me correct results, independent of whether I use 2 steps with a dt of for example 20ms or one step with a dt of 40ms. Now I would like to introduce air drag. For simplicity's sake I use a=k*v^2 where a is the air drag's acceleration (I am aware that it would usually result in a force, but since I assume 1kg for my object's mass the force is the same as the resulting acceleration), k is a constant (in this case I'm using 0.001) and v is the speed. Now in an infinitely small time interval a is k multiplied by the velocity in this small time interval powered by 2. The problem is that v in the next time interval would depend on the drag of the last which again depends on the v of the last interval and so on... In other words: If I use a=k*v^2 I get different results for my position/velocity when I use 2 steps of 20ms than when I use one step of 40ms. I used to have this problem for my position too, but adding +g*dt^2/2 to the formula for my position fixed the problem since it takes into account that the position depends on the velocity which changes slightly in every infinitely small time interval. Does something like that exist for air drag too? And no, I dont mean anything like Adding air drag to a golf ball trajectory equation or similar, for that kind of method only gives correct results when all my steps are the same. (I hope you can understand my intermediate english, it's not my main language so I would like to say sorry for all the silly mistakes I might have made in my question)

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• Will I be able to get programming interviews at good software companies with a non-CS degree?

  - by friend

  I'll be graduating in a year, but I'll have a degree in Economics. I'm pretty much done with my Economics coursework, and by the time next year comes around I will have devoted 1.5 years to learning CS. I will have almost finished the requirements to graduate with a degree in CS, but unfortunately my school requires a science series that would add another 6-9 months of study if I were to try and get the degree (not to mention a max unit cap). I have or will have taken: Objected Oriented Programming Discrete Math Data structures Calculus through multivariable (doubt this matters at all) Linear Algebra (same) Computer Organization Operating Systems Computational Statistics (many data mining projects in R) Parallel Programming Programming Languages Databases Algorithms Compilers Artificial Intelligence I've done well in the ones I've taken, and I hope to do well in the rest, but will that matter if I can't say to the HR people that I have a CS degree? I'd be happy to get an internship at first too, so should I just apply as if I'm an intern and not looking for fulltime, and then try and parlay that into something? Sidenote if you have time -- Is a computer networks or theory of computation class important? Would it be worth taking either of those in lieu of a class on my list? edit -- I know this isn't AskReddit or College Confidential; I know there will be some outrage at posting a question like this. I'm merely looking for insight into a situation that I've been struggling with, and I think this is the absolute best place to find an answer to this question. Thanks.

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• I have problem on 12.10 64bit with nvidia graphics driver opensource and proprietary ! Can't change resolution on 3d games

  - by digitalcrow

  I have problem with nvidia graphics driver opensource and proprietary ! Can't change resolution on 3d games and there's a bug there are no kernel sources installed and thus jockey can't install proprietary drivers. I can't change resolution while on games fullscreen. I tried to install proprietary driver and i couldn't plus i couldn't login to ubuntu it showed only the desktop photo no dash no nothing. -tried to install kernel sources and blacklist+remove Nouveau drivers and then installed the proprietary drivers i hope succesfully. -The problem is the same i can't change resolution on 3d games while on fullscreen. I've installed the sources and be able to install the proprietary nvidia drivers but the problem remains, look what i got in the output of a 3d game exited while i tried to change resolution: X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 150 (XFree86-VidModeExtension) Minor opcode of failed request: 10 (XF86VidModeSwitchToMode) Value in failed request: 0x25b Serial number of failed request: 497 Current serial number in output stream: 499 I'm giving you more details about my system: i have an nvidia geforce gts 250 , 3,4 ghz quadcore amd phenom2 , 8gbytes of ram. The output of: sudo lshw -C display; lsb_release -a; uname -a Is the following: *-display description: VGA compatible controller product: G92 [GeForce GTS 250] vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a2 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:18 memory:fa000000-faffffff memory:d0000000-dfffffff memory:f8000000-f9ffffff ioport:ef00(size=128) memory:fb000000-fb01ffff No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.10 Release: 12.10 Codename: quantal Linux darkpc 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I like ubuntu's style and user interface but i hate the bad quality of work they do.

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• Wifi doesn't connect if I'm upstairs

  - by user11233

  Hello there, I'm finding that Wifi connects when I'm in the living room, where the internet router etc is. But if I try to connect upstairs it is a no go. Booting in Windows 7 (dual boot :D ) I find that Wifi connects. I find this very confusing and have it since the install. Please help! Kind regards. #sudo lshw -c network *-network description: Wireless interface product: PRO/Wireless 5100 AGN [Shiloh] Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 00 serial: 00:21:5d:1a:63:58 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=2.6.35-26-generic firmware=8.24.2.12 ip=10.0.0.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg resources: irq:49 memory:de200000-de201fff Hope it helps! Hello guys, just tried to connect internet upstairs and to my surprise it does connect. Don't know exactly why. Only thing I've done recently is input the codes said bij Oli. Two things I've done on my own 1: installed Jupiter and 2: installed laptop-mode-tools. I really don't know if this can effect my internet but it's the only thing I can think of. Thanks for all the help, really appreciate it :) PS If someone thinks it might be helpful for others I would like to help find a 'real' solution to this problem. Just post down what I need to post here and I will try my best to help.

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• Using .htaccess, can you hide the true URL?

  - by Richard Muthwill

  So I have a web hotel with 1 main website http://www.myrootsite.com/ and a few websites in subdirectories, in a folder called projects. I have domain names pointing to the subdirectories, but when holding the mouse over a link in those websites the URLs are shown as: http://www.myrootsite.com/projects/mysubsite/contact.html When I'm on mysubsite.com I want them to be shown as: http://www.mysubsite.com/contact.html I spoke to support for the web hotel and the guy said try using .htaccess, but I'm not sure exactly how to do this. Thank you very much for your time! Edit: For more information My website is: http://www.example1.com/ and I also own http://www.example2.com/. All of example2.com's files are in: example1.com/projects/example2/. When you visit example2.com, you'll notice all of the URL's point towards: example1.com/projects/example2/ but I want them to point towards: example2.com/ Can this be done? I hope this is enough info for you to go on :). Edit: For w3d I go to the url mysubsite.com and the browser shows the url mysubsite.com. The services I'm using create an iframe around myrootsite.com and use the url mysubsite.com I just hate that in Firefox and Internet Explorer, holding the mouse over link show that the destination url is: myrootsite.com/projects/mysubsite/...

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