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• Formatting and installing Ubuntu over Windows 7 without admin password

  - by Emiliano Pasqualetti

  A borrowed a friend workstation with Windows 7 and Ubuntu 10.10. I do not have the administrator password and I would like to format everything and install Ubuntu 12.04. I have put the iso on the usb using PendriveLinux and restarted the machine. At the boot I am presented with several options but those Ubuntu ones simply load my friends Ubuntu 10.10 OS (for which I have no password). edit: I fixed this by pressing F12 at the boot before it gave me that prompt (called GRUB). I clicked USB and finally install.

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• Splitting assemblies - finding the balance (avoiding overkill)

  - by M.A. Hanin

  I'm writing a wide component infrastructure, to be used in my projects. Since not all projects will require every component created, I've been thinking of splitting the component into discrete assemblies, so that every application developed will only be deployed with the required assemblies. I assume that creating an assembly has some storage overhead (the assembly's code, wrapping whatever is inside). Therefore, there must be some limit to the advantage gained by splitting an assembly - a certain point where splitting the assembly is worse than keeping it united (storage-wise and performance-wise). Now, here is the question: how do I know when splitting an assembly is an overkill? P.S I guess there are other overheads to assembly splitting, aside from the storage overhead. If anyone can point out these overheads, it would be much appreciated.

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• Stack / base pointers in assembly

  - by flyingcrab

  I know this topic has been covered ad-naseum here, and other places on the internet - but hopefully the question is a simple one as I try to get my head around assembly... So if i understand correctly the ebp (base pointer) will point to the top of the stack, and the esp (stack pointer) will point to the bottom -- since the stack grows downward. esp therefore points to the 'current location'. So on a function call, once you've saved the ebp on the stack you insert a new stack frame - for the function. So in the case of the image below, if you started from N-3 you would go to N-2 with a function call. But when you are at N-2 - is your ebp == 25 and the esp == 24 (at least initially, before any data is placed on the stack)? Is this correct or am I of on a tangent here? Thanks!

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• Javascript draw dynamic line

  - by Ranch

  Hello, I'm looking for Javascript code for letting the user draw a line (on an image). Just as the line tool in Photoshop (for example): The user clicks on the image, drags the mouse (while the line between the start point and the mouse point is dynamically drawn on mouse drag). I would also need a callable function to send the page the start and end coordinates. I've found this very nice script for area selection: http://www.defusion.org.uk/code/javascript-image-cropper-ui-using-prototype-scriptaculous/ and I've found many script for drawing lines (and other shapes in JS), but could not find what I'm looking for. Thanks

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• how to change format 1 to format 2 .

  - by zjm1126

  when i store my kml string to databse,i be this : 2. <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://www.opengis.net/kml/2.2"> <Placemark> <name>Simple placemark</name> <description>Attached to the ground. Intelligently places itself at the height of the underlying terrain.</description> <Point> <coordinates>-122.0822035425683,37.42228990140251,0</coordinates> </Point> </Placemark> </kml> so how to change it using jquery or javascript

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• WinForms: finding the size of a minimized form without going to FormWindowState.Normal

  - by Doc Brown

  Is there an easy way to determine the size of a Form it does have in WindowState=Normal, without actually changing the Form state? Here is what I do now (C# code): public class MyForm: Form { public void MyMethod() { // ... FormWindowState oldState = this.WindowState; this.WindowState = FormWindowState.Normal; Point windowLocation = this.Location; Size windowSize = this.Size; this.WindowState = oldState; // ... } } This is what I would like the code to look like: public class MyForm: Form { public void MyMethod() { // no state change here Point windowLocation = this.NormalStateLocation; Size windowSize = this.NormalStateSize; } } In fact there are no NormalStateLocation or NormalStateSize properties in Windows Forms.

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• NO-SQL reliable for small bussines app?

  - by mamcx

  I'm deciding between go for a NON-SQL engine or a regular SQL one for a document managment system for small bussines. I have experience with firebird/sql server and found a good track of reliability (specially with firebird). This market is full of crappy "servers" (clon-made PC, the mayority), cheap harddisk, rarely use of RAID or anything like that, some are in locations where a power-off is normal, some not have a UPS, etc... (I will include off-site auto-backup to external servers, but that no change the internal setup). (I know about end-user education about such proper setups, but is stupid depend on that, so stick to te point) From the desing point of view, a schema-less database is the way to go for my system, but, I worry if any of the actual solutions (MongoDb, Tokyo Cabinet, etc) are like firebird and survice crash, malfunctions & abuse so data corruption is very rare. The plan is store the office documents there & provide a central repository.

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• Copy a linked list

  - by emkrish

  typedef struct Node { int data; Node *next; Node *other; }; Node *pHead; pHead is a singly linked list. The next field points to the next element in the list. The other field may point to any other element (could be one of the previous nodes or one of the nodes ahead) in the list or NULL. How does one write a copy function that duplicates the linked list and its connectivity? None of the elements (next and other) in the new list should point to any element in the old list.

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• Byobu looks broken in Putty from Windows

  - by TheLQ

  After trying screen for 2 days I already hate it and am now trying byobu. However currently it looks very broken in Putty. I've already fixed the key mapping issue, but this issue isn't specified in the man page or even google: Notice the misplaced position of the list of windows, the broken selector position, the duplication of the last window, the random a in the top right, and the misplaced apply option. You can't see this, but the last option is not selectable. Is there some option in Putty I need to use in order to see this correctly?

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• Problem with the installation of VirtualBox

  - by Antonis Grigoriadis

  I am trying to install virtualbox and make it work but it doesn't seem I can. In the image you can seem the output. If I run VBoxManage --version I get: WARNING: The character device /dev/vboxdrv does not exist. Please install the virtualbox-dkms package and the appropriate headers, most likely linux-headers-generic. You will not be able to start VMs until this problem is fixed. 4.3.10_Ubuntur93012 But virtualbox-dkms is already installed and at the latest version. So I tried to reinstall it and i got this: Any help will be appreciated. EDIT: The output after reconfigure (@M.Tarun suggestion): EDIT 2: Also installed the sources as @Hmayag instructed, purged virtualbox and installed it again but I got the same problem.

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• Google De-Index many pages at once?

  - by Jakobud

  On one of our websites, Google has been indexing something it wasn't supposed to. We fixed the problem so it shouldn't happen anymore, but are interested in requesting that Google de-index these pages. The problem is that there are about 10,000 pages. They all look similar to this: http://www.mysite.com/file.php?o=34995 http://www.mysite.com/file.php?o=4566 http://www.mysite.com/file.php?o=223af http://www.mysite.com/file.php?o=6ga3h http://www.mysite.com/file.php?o=sfh45a etc... All the pages are file.php with get parameters like above. Is it possible to put in a de-index request like: http://www.mysite.com/file.php* so that Google removes all 10,000 pages?

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• jslint eclipse plugin?

  - by Nikita

  Can anyone point to a functioning JSLint plugin for eclipse (3.5)? thanks

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• Are ORM's counterproductive to OO design?

  - by Jeremiah

  In OOD, design of an object is said to be characterized by its identity and behavior. Having used OR/M's in the past, the primary purpose, in my opinion, revolves around the ability to store/retrieve data. That is to say, OR/M objects are not design by behavior, but rather data (i.e. database tables). Case and point: Many OR/M tools come with a point-to-a-database-table-and-click-object-generator. If objects are no longer characterized by behavior this will, in my opinion, muddy the identity and responsibility of the objects. Subsequently, if objects are not defined by a responsibility this could lend a hand to having tightly coupled classes and overall poor design. Furthermore, I would think that in an application setting, you would be heading towards scalability issues. So, my question is, do you think that ORM's are counterproductive to OO design? Perhaps the underlying question would be whether or not they are counterproductive to application development.

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• Quadratic bezier curve: Y coordinate for a given X ?

  - by stefan.at.wpf

  Hello, I have a quadratic bezier curve and I need the Y coordinate of a point on the bezier curve for a given X coordinate. I know that in pure maths this can be easily done, but I'm wondering is there's a simple / another way for this in C# / WPF? Is it possible to get the single points used by C# / WPF for drawing the bezier curve and then maybe just loop them and compare the X coordinate of each point with the given X coordinate? BTW for the mathematical way it would be good to know which step for the parameter t of the bezier curve has been choosen by C# / WPF? Any chance to find this out? Probably t is just scaled by / steps for t are 1/(distance of P0 and P2) ? Thank you very much for any hint!

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• Winforms Hotkey, Help?

  - by Di4g0n4leye

  namespace WebBrowser { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } int GetPixel(int x, int y) { Bitmap bmp = new Bitmap(1, 1, PixelFormat.Format32bppPArgb); Graphics grp = Graphics.FromImage(bmp); grp.CopyFromScreen(new Point(x,y), Point.Empty, new Size(1,1)); grp.Save(); return bmp.GetPixel(0, 0).ToArgb(); } void Button1Click(object sender, EventArgs e) { int x = Cursor.Position.X; int y = Cursor.Position.Y; int pixel = GetPixel(x,y); textBox1.Text = pixel.ToString(); } void MainFormLoad(object sender, EventArgs e) { webBrowser1.Navigate("http://google.com"); } } } } i want to add a hotkey that call Button1 on Press, How can that be done?

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• Computing orientation of a square and displaying an object with the same orientation

  - by Robin

  Hi, I wrote an application which detects a square within an image. To give you a good understanding of how such an image containing such a square, in this case a marker, could look like: What I get, after the detection, are the coordinates of the four corners of my marker. Now I don't know how to display an object on my marker. The object should have the same rotation/angle/direction as the marker. Are there any papers on how to achieve that, any algorithms that I can use that proofed to be pretty solid/working? It doesn't need to be a working solution, it could be a simple description on how to achieve that or something similar. If you point me at a library or something, it should work under linux, windows is not needed but would be great in case I need to port the application at some point. I already looked at the ARToolkit but they you camera parameter files and more complex matrices while I only got the four corner points and a single image instead of a whole video / camera stream.

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• When to detect collisions in game loop

  - by Ciaran

  My game loop uses a fixed time step to do "physics" updates, say every 20 ms. In here I move objects. I draw frames as frequently as possible. I work out a value between 0 and 1 to represent the proportion of the physics tick that is complete and interpolate between the previous and current physics state before drawing. It results in a smoother game assuming the frame rate is higher than the physics update rate. I am currently doing the collision detection in the physics update routine. I was wondering should it instead take place in the interpolated draw routine where the positions match what the user sees? Collisions can result in explosions by the way.

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• Mac OS - Built SVN from source, now Apache2 not loading sites

  - by Geuis

  This relates to another question I asked earlier today. I built SVN 1.6.2 from source. In the process, it has completely screwed up my dev environment. After I built SVN, Apache wasn't loading. It was giving me this error: Syntax error on line 117 of /private/etc/apache2/httpd.conf: Cannot load /usr/libexec /apache2/mod_dav_svn.so into server: dlopen(/usr/libexec/apache2/mod_dav_svn.so, 10): no suitable image found. Did find:\n\t/usr/libexec/apache2/mod_dav_svn.so: mach-o, but wrong architecture It appears that SVN over-wrote the old mod_dav_svn.so and I am not able to get it to build as FAT, and I can't recover whatever was originally there. I resolved this(temporarily?) by commenting out the line that was loading the mod_dav_svn.so and got Apache to start at this point. However, even though Apache is running I am now getting this error when trying to access my dev sites: Directory index forbidden by Options directive: /usr/share/tomcat6/webapps/ROOT/ I have Apache2 sitting in front of Tomcat6. I access my local dev site using the internal name "http://localthesite". I have had virtual directories set up that have worked until this SVN debacle. Tomcat is installed at /usr/local/apache-tomcat, and webapps is /usr/local/apache-tomcat/webapps. Our production servers deploy tomcat to /usr/share/tomcat6, so I have symlinks setup on my system to replicate this as well. These point back to the actual installation path. This has all been working fine as well. None of our configurations for Apache2, Tomcat, or .htaccess have changed. Over the weekend, I performed a "Repair Disk Permissions" on the system. This was before I discovered the mod_dav_svn.so problem. I have been reading up on this all morning and the most common answer is that there is an Options -Indexes set. We have this in a config file, but it was there before and when I removed it during testing, I still got the same errors from Apache. At this point, I'm assuming I either totally borked the native Apache2 installation on this Mac, or that there is a permissions error somewhere that I'm missing. The permissions error could be from the SVN installation, or from my repair process. Does anyone have any idea what could be the problem? I'm totally blocked right now and have no idea where to check next.

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• In Ruby are there any related applications of the syntax: class << self ... end

  - by pez_dispenser

  class << self attr_accessor :n, :totalX, :totalY end The syntax above is used for defining class instance variables. But when I think about what syntax implies, it doesn't make any sense to me, so I'm wondering if this type of syntax is used for any other types of definitions. My point of confusion here is this: class << self The append operator normally means "add what's on the right to the object on the left". But in the context of this block, how does that add up to "put the contents of this block into the definition of the class instance rather than the instance"? For the same reason I'm confused as to why in one context class << self can define class instance variables while in another it seems to create class variables such as here: class Point # Instance methods go here class << self # Class methods go here end end

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• Plymouth did not install properly

  - by David Starkey

  I was installing the plymouth manager in hopes of making a custom loading screen. While the terminal was working, my computer unexpectedly powered off. I can open up the manager and it appears to do what it is supposed to (minus the fact that I can't make my own theme) and the screen only shows on powering down. Anyway, all of the advice I have seen so far have resulted in errors and nothing getting fixed. I do not have permissions to simply select the folder and delete it for some reason and I have not been able to find out how to grant myself those permissions. I guess my question then is how do I get rid of the plymouth manager so I can reinstall it properly? Already tried: -Installation - http://www.noobslab.com/2011/11/install-plymouth-manager-and-change.html -Removal - How to remove Plymouth Boot Animation manager and keep the default boot screen -Permissions - How do I change my user permissions to edit /etc/apt/sources.list? -Theming Guide - http://brej.org/blog/?p=158

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• Enabling SSL Requests on Jdev's Integrated Weblogic

  - by Christian David Straub

  Often times you will want to enable SSL access for such things as secure login or secure signup. By default, the integrated WLS that ships with JDev does not listen to SSL requests. However, this is easily fixed.Just navigate to http://127.0.0.1:7101/console. This will deploy the console app where you can configure WLS. By default the login credentials are:username: weblogicpassword: weblogic1Then go to Environment -> Servers -> DefaultServer. Check the "SSL Listen Port Enabled" box and your server will now listen to SSL requests (just make sure to use the listen port that is specified).For added security, you can always check while processing your request that it is going through an SSL connection by first checking HttpServletRequest.isSecure().

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• How can I get flash working on Kubuntu 11.04 64bit?

  - by karategeek6

  Flash is not working on Kubuntu 11.04, 64bit on any browser. Even after a purge and reinstall, any flash application gives either says the plugin is missing or not up to date (depends on browser). This problem is just with Kubuntu, not with Ubuntu. How can I get flash working again? After installing the package flashplugin-installer, the command find / -name "libflashplayer.so" doesn't find anything. Update: I fixed it by manually installing flash. I posted my script and made it a community wiki so it can be improved upon.

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• DNS for domain shows old website for www version

  - by user3745746

  I bought 2 domains form GoDaddy but with both I am seeing the same problems in that the domain on the www version goes to the old site which is still being hosted. I have checked the IntoDNS website and in the www record it shows: Your www.example.com A record is: www.example.com -> example.typepad.com -> cname-cloudflare.typepad.com -> What can I do to stop this from happening? Will this eventually be automatically removed and fix itself? Though obviously it's not automatically fixed itself in the long drawn out expiry process... It's been quite a while for one of them and still hasn't propagated for the www. I'm not having any problems with the normal example.com part of the site.

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• Turn the Cables from Your Gaming or Electronics Setup into a Wall-Based Work of Art

  - by Asian Angel

  When it comes to gaming setups or our favorite electronics, there are always lots of cables to deal with. Now you could just bundle those cables up and try to hide them as best you can or you could turn them into a work of art… You can see additional pictures and find out how to set up your own wall-based work of art with those cables by visiting the blog post linked below. Feature Friday: Cords Away [via There I Fixed It] Here’s How to Download Windows 8 Release Preview Right Now HTG Explains: Why Linux Doesn’t Need Defragmenting How to Convert News Feeds to Ebooks with Calibre

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• Open Source Utilization Questions: How do you lone wold programmers best take advantage of open sour

  - by Funkyeah

  For Clarity: So you come up with an idea for a new program and want to start hacking, but you also happen to be a one-man army. How do you programming dynamos best find and utilize existing open-source software to give you the highest jumping off point possible when diving into your new project? When you do jump in where the shit do you start from? Any imaginary scenarios would be welcome, e.g. a shitty example might be utilizing a open-source database with an open-source IM client as a starting off point to a make a new client where you could tag and store conversations and query those tags at a later time.

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