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• Ubuntu thinks I have two displays

  - by ResidentBiscuit

  When I first installed Ubuntu I noticed that my mouse would flicker a lot, which caused me to investigate. I remembered back when I ran Fedora I had an issue where it thought I had two displays (hp-dv7 4285dx laptop). In Fedora, this didn't cause any issues. In Ubuntu, it causes the mouse the flicker a lot. The fix I've been using is to just go into settings displays and disable the display that doesn't actually exist. The only problem is that this is not permanent. Each time I start up Ubuntu, I have to go back in and disable this display. They're each just titled "Built-in Display", and have the same resolution. My laptop does have two graphics cards: one on-board and one dedicated. I'm not sure if maybe that is causing is an issue? Any guidance towards this would be great. Thanks!

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• Cursor-Killing: Accessing Data in the Next Row

  Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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• Using terminal in hacking way (Xubuntu 10.04)

  - by user1163511

  I am beginner in using terminal in Linux. I have some questions about it. First of all, I want to ask you question out of the issue-What is the name of th Terminal in Xubuntu 10.04(for example- bash or anything like this)? My main question is - Is there any way of using the terminal for hacking (e.g. port scanning, whois, gaining root account and take a look of the file system of the server or another things). I will be very pleased to get answers. Thank you for patience and tolerance!

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• Making a project open source on behalf of my organization

  - by rajesh

  I am working on a tool which has been developed for the use in my organization. Recently the management decided to make this open source. This will be the first open source contribution from my company and by me . How can I make a project open source which will also show that this is from this organization? Is just naming it as orgName_toolName sufficient or is there any other practice that is followed? I am planning to make this available in Github.

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• Why doesn't this ContentLoader project (VS2010 e) recognize Microsoft.Build.dll?

  - by IAbstract

  I am working with an XNA content loader sample. In the references for the project (VS 2010 Express) there are: Microsoft.Build Microsoft.Build.Framework //as well as the standard XNA framework and graphics references To emulate this project, I am trying to first add a reference to Microsoft.Build.dll. But Visual Studio warns me that it cannot load the .dll. I looked at MSDN and the document referenced Microsoft.Build.Evaluation. This is suppose to be available in the Microsoft.Build.dll and then I'll have access to the Project class. Has anyone had any experience with this?

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• Visual Basic 2010 Listbox Error [migrated]

  - by stargaze07

  what is the meaning of this error? sorry it's my first time to use Visual basic 2010, I'm not familiar with this kind of error, I use this for selecting all the files in the listbox and tried to move or copy to another listbox in other form. Error 1 'ToArray' is not a member of 'System.Windows.Forms.ListBox.ObjectCollection'. This is the code I use. Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If RadioButton1.Checked Then Dim itemsToMove = ListBox1.Items.ToArray() For Each item In itemsToMove Form2.lstP.Items.Add(item) ListBox1.Items.Remove(item) Next Form2.Show() End If End Sub Can someone help me with this?

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• How to find a programming mentor?

  - by Dvole

  I decided to learn programming. I've been reading SO for few days, and I think I will start with C++, as I read some articles. I am aware of loops, arrays, program logic and objects a little and I need someone to look me over and help me with small questions I get when doing my first projects. So here is the question - where do I find such guy? I don't got any friends who program and all. EDIT: 2 years later, I am still looking for mentor. I did not actively code just started 3 months again. I work on Objective-C and iOS programming and game programming with Cocos2d. If you want to become my mentor, drop me a or comment.

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• Are nested classes under-rated?

  - by Aaron Anodide

  I'm not trying to say I know something everyone else doesn't but I've been solving more and more designs with the use of nested classes, so I'm curious to get a feeling for the acceptablilty of using this seemingly rarely used design mechanism. This leads me to the question: am I going down an inherintly bad path for reasons I'll discover when they come back to bite me, or are nested classes maybe something that are underrated? Here are two examples I just used them for: https://gist.github.com/3975581 - the first helped me keep tightly releated heirarchical things together, the second let me give access to protected members to workers...

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• Problem adding a ppa

  - by Roman Rdgz

  I want to install gcc compiler 4.7 to use c++11 features. I have looked on the internet for instructions, and I found in several websites these steps: sudo add-apt-repository ppa:Ubuntu-toolchain-r/test sudo apt-get update sudo apt-get install gcc-4.7 g++-4.7 The problem is that my console freezes when adding the ppa. At first I thought it was due to having an old Ubuntu version (11.04). So I have upgraded to 11.10 and then 12.04, and everything seems to work OK. But still having the same problem. Any help?

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• Ubuntu on low powered laptop

  - by zkent

  First off, I am new to Ubuntu. I come from a Windows background (DOS before that) and am loving it so far. I installed it on an older Dell laptop that I wanted to get another year out of. I set this machine up primarily as a LAMP development machine for a project I am working on. The machine is a Vostro 1500 and it has 4GB RAM (maxed) and an upgraded hard drive. I can't watch YouTube videos for long before it starts to overheat and start acting sporadic. I can live without YouTube but every so often the application switching (alt-tab) gets slower and begins not showing all applications and the Dash home quits displaying properly. I am sure I am asking a lot of this old machine. What I really want to know is: are there any settings in Ubuntu that allow me to lower the graphic effects (fade-ins, transparencies, fancy transitions, etc) that would be less taxing on the video card?

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• Should students have the right to do exams using a computer?

  - by vemv

  In some colleges students are let to use an IDE and Internet and in mine you have to write down your solution in paper. As far as I know, it's pretty much impossible to make a correct non-trivial program on the first try. I'd be fine with no using computers if my teachers assessed my approach instead my code -literally-... that's not the case unfortunately. Which ones are more usual, 'written' or 'coded' exams? And which way is the most adequate?

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• Can't boot to Ubuntu 11.10 after installation with Windows 7

  - by Tylor

  I just installed Ubuntu 11.10 on a machine with Windows 7 already installed. I want to setup the dualboot environment. I have a block of unallocated disk space at the end of the disk (some blog post suggested to do so). Then I started installing Ubuntu 11.10 on that part of disk. I installed the boot loader to /boot partition and the installation finished successfully. However, after installation, Ubuntu 11.10 doesn't show up on boot menu. Then I searched on Internet and I used EasyBCD to add a grub2 boot to boot menu. After this, the boot entry does show up in the boot menu, however it only boot into some sort of grub console. I tried many times, and it doesn't work. It looks like the boot loader is not properly installed? I only have one 1.5TB disk and the first 800GB is NTFS partition with Windows 7. Does this work?

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• Macro to Add using System.Linq

  - by Aligned

  I have Visual Studio 2010 setup to remove and sort settings on save with the Power Commands extensions. This is great, but sometimes it removes the using System.Linq at the top. I also find myself scrolling to the top to add the using when I first add System.Linq. So I wrote a quick macro to do it for me. Sub AddUsingLinq()        DTE.ActiveDocument.Selection.StartOfDocument()        DTE.ActiveDocument.Selection.StartOfLine(vsStartOfLineOptions.vsStartOfLineOptionsFirstText)        DTE.ActiveDocument.Selection.Text = "using System.Linq;"        DTE.ActiveDocument.Selection.NewLine()        DTE.ExecuteCommand("Edit.FormatDocument")        DTE.ExecuteCommand("Edit.RemoveAndSort")        DTE.ActiveDocument.Save() DTE.ExecuteCommand("View.NavigateBackward")    End SubHook this up to a shortcut (tools -> options -> keyboard, I chose ctrl + x, c) and you'll be moving faster than ever.

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• Have I mistakenly assumed that my routines are loosely coupled?

  - by Tarun

  My Selenium test structures goes as - Data Object class - public class RegistrationData { String firstName = "test first name"; String lastName = "test last name"; // Getter Setter Here } Page Object class which carries out operations on a Web Page - public class RegistrationPage { private RegistrationData regData; public void setRegistrationData(RegistrationData regData) { this.regData = regData(); public NewAccountPage fillRegForm() { enterFirstName("FirstNameTextBoxLocator", regData.getFirstName); enterLastName("LastNameTextBoxLocator", regData.getLastName); // Some more fields are filled here return NewAccountPage(); } } And test class uses them as - public class TestRegistration extends SelTestCase { @Test public void testRegNewUser() { RegistrationData regData = new RegistrationData(); RegistrationPage regPage = New RegistrationPage(); regPage.setRegistrationData(regData) regPage.fillRegForm(); // Some assertion here } } Now since fillRegForm method does not take any argument, Can I assume that it is an example of loose coupling despite I need to set RegistrationData in RegistrationPage before being able to use fillRegForm method.

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• A guide to what has changed in the Silverlight 4 RC

  At MIX10, Silverlight 4 released an update, the Silverlight 4 RC (release candidate). A few things have changed since the beta which was released in November. If you havent read my guide to Silverlight 4 you may want to check that out. The features still exist, but there are some changes to the implementations of some of the features as well as some new ones. Please go read the previous post to familiarize yourself with the features. This post will be complimentary to that and identify new/changed. First...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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• Is there ever a time when creating a level/world editor with your game is a bad idea?

  - by Borgel

  I have created a few smaller games on my own in the past. My approach has always been to create a completed editor where it has all the functionality needed to save a level file and load it into the game. This has always made most sense to me but I keep hearing from people that a game is never fully done in the editor. I have never worked in a game development team and so I don't have first hand experience, but not adding everything needed to make the game to the editor just seams wrong. Am I missing something? Is there ever a reason not to add a tool to the editor?

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• Should I drawing directly on CCLayer or CCSprite?

  - by einverne

  Now I am a little confused in my cocos2d-x cpp project. I want to draw lines with user's finger touch. Following the screenshot of a CCScene: In the screen, there are two squares. I want show an animation in the first square and let the second one draw lines with user touch. Now these two squares are CCSprite. And I can draw dots in the second one on the CCLayer. But I am little confused that I should draw lines on the Sprite or on the Layer. Or are there other ways to organize the code?

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• Silverlight 4 + RIA Services - Ready for Business: Validating Data

    To continue our series lets look at data validation our business applications. Updating data is great, but when you enable data update you often need to check the data to ensure it is valid.  RIA Services as clean, prescriptive pattern for handling this.   First lets look at what you get for free.  The value for any field entered has to be valid for the range of that data type.  For example, you never need to write code to ensure someone didnt type is forty-two into...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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• Does a program need to respond straight to the point or politely? [migrated]

  - by Fabian Bigler

  I wonder if it's better if the program responds straight to the point or politely. Consider the following example: The user clicks a button to print something based on a template. However, the template does not exist. Which feedback would you prefer: The template is not defined yet. Please make sure to set the template before you print it out. Make sure to configure the template before printing. The first statement is more polite. The user feels treated well. The second statement is more straight forward and faster understood. What is generally better?

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• EVGA GTX650Ti Boost / Ubuntu 12.04 / 2 X-Star WQHD

  - by user210045

  I bought 2 X-Star WQHD monitors which, predictably, did not work with my on board video card. Yesterday I installed the EVGA card and have been trying to get the NVIDIA drivers to work. I tried to install the 304 .run, I tried to remove that and then install the nvidia-current, then I tried to activate the proprietary driver from within Ubuntu...for the first couple of attempts, I was able to see 800x600 or something close on the X-Star displays but now all I see is flashing colors on those. On my older Samsung monitor (S22B300B 21.5") is still displaying through the EVGA card. Any thoughts on how to go about fixing this?

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• Problem installing libva (VAAPI), vainfo fails

  - by satuon

  I'm following a wiki on how to make VLC use the GPU in the Core i3 integrated graphics chipset, but I'm stuck at one of the first steps, installing VAAPI. I installed libva1 and vainfo by using "sudo apt-get install libva1 vainfo", but when I run vainfo it says libva: libva version 0.32.0 libva: va_getDriverName() returns 0 libva: Trying to open /usr/lib/dri/i965_drv_video.so libva: va_openDriver() returns -1 vaInitialize failed with error code -1 (unknown libva error),exit It should say VAProfileH264High : VAEntrypointVLD VAProfileVC1Advanced : VAEntrypointVLD according to the wiki. /usr/lib/dri/i965_drv_video.so doesn't exist in my system, but I installed libva1 with apt-get.

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• Am I personally liable for bugs in medical software I've developed as an employee? [closed]

  - by user466406

  Some background: I'm employed at a small, Australia-based web agency that is dipping it's toe into Mobile Application development (iOS). The project that I'm working on provides a way for users to save medication dosage information which is sync'd with a backend server. Users must agree to ToS, Disclaimer etc before using the application. This is my first iOS application, and the project is currently over budget. As a result, management is not devoting the resources to Q&A and is pushing instead for more features. I am an employee of the agency, that has been contracted by a non-for-profit. The application will probably be released under our agency's name, but we also have the option of releasing it as the not-for-profit. My question is, if there are bugs found in the application, and as a result a user takes an incorrect dosage of a medication, am I personally liable? Is there anything that I can or should do in order to protect myself personally?

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• Unit testing multiple conditions in an IF statement

  - by bwalk2895

  I have a chunk of code that looks something like this: function bool PassesBusinessRules() { bool meetsBusinessRules = false; if (PassesBusinessRule1 && PassesBusinessRule2 && PassesBusinessRule3) { meetsBusinessRules= true; } return meetsBusinessRules; } I believe there should be four unit tests for this particular function. Three to test each of the conditions in the if statement and ensure it returns false. And another test that makes sure the function returns true. Question: Should there actually be ten unit tests instead? Nine that checks each of the possible failure paths. IE: False False False False False True False True False And so on for each possible combination. I think that is overkill, but some of the other members on my team do not. The way I look at it is if BusinessRule1 fails then it should always return false, it doesn't matter if it was checked first or last.

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• wireless not working, but wired does

  - by user211762

  First of all I'm new to Ubuntu, just bought a laptop with Ubuntu yesterday. I disable wireless networking in the upper right corner, and I don't have option to enable it back. I tried a lot of things and none is seems to work: I installed Wicd network manger, and it says no wireless network found, but i assure you there are several of them as my smart tv can detect them. when I type rfkill list, I get this: 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no when I type ifconfig wlan0, I get this: wlan0: error fetching interface information: Device not found

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• Does facebook store multiple password hashes for each user?

  - by loxxy

  I noticed that Facebook allows multiple variants of my own password : My password as it is. My password with first letter capitalized. My password with all letters capitalized. It is commonly known that passwords are stored as hashes. So my question is, does facebook store multiple hashes for each user? Since the hash of each variant should be completely different... Or am I missing something, here? And there may be more combinations, besides the one I observed as well. This is obviously done to provide a better user experience & they probably have a statistical explanation of people repeating these mistakes. But I could not help but wonder, is it worth to increase so many lookups (in their database) just to help the user type a wrong password? On top of this, they warn about the caps lock (even though they don't seem to care) :

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