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• How to merge multiple internet connections into one

  - by Luis Alvarado

  My PC has 2 wired cards. Both gigalan. It also has 2 wireless cards. One broadcom with proprietary drivers and ralink with open software (which works much better than broadcom). My cellphone can share its connection wirelessly to my PC. But I also have a wired connection. So I have multiple connections that I can use to have internet. How can I merge 2 or more connections together and balance them to enjoy one unified internet experience that it is the sum of all internet connections connected to it. For example if I have an internet connection that offers 1024KB/Sec and another that offers 512KB/Sec and one small one that offers 128KB/Sec, after load balancing and merging all connections, I could download at a speed of 1664KB/Sec using all 3 internet connections as one for example. This question has always intrigued me.

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• Passing an objects rotation down through its children

  - by MintyAnt

  In my topdown 2d game you have a player with a sword, like an old Zelda game. The sword is a seperate entity, and its collision box "rotates" around the player like an orbit, but always follows the player wherever he goes. The player and sword both have a vector2 heading. The sword is a weapon object that is attached to the character. In order to allow swinging in a direction, I have the following property inside sword (RotateCopy returns a copy of the mHeading after rotation) public Vector2 Heading { get { return mHeading.RotateCopy(mOwner.Rotation); } } This seems a bit messy to me, and slower than it could be. Is there a better way to "translate" the base/owner component rotations through to whatever component I am using, like this sword? Would using a rotation MATRIX be better? (Curretnly rotates by sin/cos) If so, how can I "add" up the matrices? Thank you.

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• Cannot use apt-get anymore because of one specific package

  - by Alex K.

  No matter what type of apt-get I run (install, update, ...) I always get: dpkg: warning: files list file for package `libgdata-google1.2-1' missing, assuming package has no files currently installed. dpkg: warning: files list file for package `libntlm0' missing, assuming package has no files currently installed. (Reading database ... 354644 files and directories currently installed.) Preparing to replace libntlm0 1.1-1 (using .../libntlm0_1.1-1_i386.deb) ... Unpacking replacement libntlm0 ... At this point apt-get hang. Does somebody know a way to fix this? Some days ago a line in source.list was removed (Google Chrome).

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• Debugging Minimum Translation Vector

  - by SyntheCypher

  I implemented the minimum translation vector from codezealot's tutorial on SAT (Separating Axis Theorem) but I'm having an issue I can't quite figure out. Here's the example I have: As you can see in top and bottom left images regardless of the side the of the green car which red car is penetrating the MTV for the red car still remains as a negative number also here is the same example when the front of the red car is facing the opposite direction the number will always be positive. When the red car is past the half way through the green car it should switch polarity. I thought I'd compensated for this in my code, but apparently not either that or it's a bug I can find. Here is my function for finding and returning the MTV, any help would be much appreciated: Code

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• Modal popup showing on the wrong monitor

  - by Chase Seibert

  On Ubuntu 11.10, I'm seeing modals from many applications show up on a different monitor from their parent application. In this example, Firefox, the application on the right most monitor, has popped up a modal dialog in the center monitor. You'll notice that it is not just on the wrong monitor, it's also positioned horizntally against the left edge of that monitor. Vertically, it's centered. This happens for at least Firefox, Eclipse and gedit modals. It seems like it's all applications. It doesn't matter which monitor the parent application is on, the modals are always on the left edge of the center monitor.

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• Speaking at SW FL Code Camp Sept 8th 2012

  - by Nikita Polyakov

  It’s always a great time when it’s a Code Camp! I will be presenting “Windows [Phone] Live Tiles & Push Notifications“ at this year’s South West Florida Code Camp 2012 on September 8th.  As with many Code Camps – it’s going to be a trick to pick which session to go to at each time slot, and that’s how you know it’s a good one – so much content – so many great speakers! Hope to see you there! Details & Registration: http://codecamp.swfldev.net Code Camp 2012 will take place at: Hodges University 2649 Professional Circle Naples, Florida 34119 Don’t forget about these two great events coming up as well: http://www.TampaCodeCamp.com and http://itprocamp.com/tampa/

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• All my bandwidth eaten up - report included

  - by Mel

  I have my network bandwidth eaten up totally. Whenever I connect my network, without any application being opened it is always full. I have prepared report of iftop, nethogs and network system monitor. iftop and nethogs My host IP is 192.168.1.203 and all the rest are not known though I have tried to pin 192.168.1.105, it doesn't reply. If possible I would like to block the most disturbing IP which is 192.168.1.105 to block it. but don't know how.

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• About floating point precision and why do we still use it

  - by system_is_b0rken

  Floating point has always been troublesome for precision on large worlds. This article explains behind-the-scenes and offers the obvious alternative - fixed point numbers. Some facts are really impressive, like: "Well 64 bits of precision gets you to the furthest distance of Pluto from the Sun (7.4 billion km) with sub-micrometer precision. " Well sub-micrometer precision is more than any fps needs (for positions and even velocities), and it would enable you to build really big worlds. My question is, why do we still use floating point if fixed point has such advantages? Most rendering APIs and physics libraries use floating point (and suffer it's disadvantages, so developers need to get around them). Are they so much slower? Additionally, how do you think scalable planetary engines like outerra or infinity handle the large scale? Do they use fixed point for positions or do they have some space dividing algorithm?

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• Port numbers appended to anchor tags

  - by glifchits

  I've built a static site. Locally, when I serve the content with python -m SimpleHTTPServer everything behaves normally, but when I copy the HTML onto the server and browse the site at the server's URL, some links will have a port number appended to the domain. For example: url.com:84/path where the correct path is url.com/path. The port number is usually different, always between 81-85. It is an Apache server. I'm not experienced with web server configuration, and I'm not the admin of the server. Let me know if there is more information that can help solve my problem. ~> cat /etc/*release* SuSE SLES-8 (i386) VERSION = 8.1 UnitedLinux 1.0 (i586) VERSION = 1.0 LSB_VERSION="1.2" DISTRIB_ID="UnitedLinux" DISTRIB_RELEASE="1.0" DISTRIB_DESCRIPTION="UnitedLinux 1.0 (i586)"

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• How to save one role implementing a client/server pattern in Azure?

  - by Alfredo Delsors

  Sometimes you need to have an instance performing a server role when other instances are playing the client role. An example can be a file sharing like in this great post: http://blogs.msdn.com/b/mariok/archive/2011/02/11/sharing-folders-in-azure.aspx, one instance shares a folder that all other instances are using to write files that the server processes. The problem is that there is not discovering mechanism in Azure that allows one instance to know where the instance acting as a server is located. A first approach can be having a server role and a client role like in the previous post. This means more instances, more money. A solution to save this "server" role is to use Instance 0, always available, to act as a server. An instance can know that it should act as the server checking RoleEnvironment.CurrentRoleInstance.Id.EndsWith(".0"). Other instances can iterate the RoleEnvironment Instances collection to find the instance whose name ends with ".0", getting its endpoints and acting as its clients.

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• Where can a list of Desktop web browsers be found at?

  - by Sn3akyP3t3

  I have another question posted in regards to the practicality of whitelisting. In this question I'm simply looking for an frequently updated list of top known used Desktop web browsers to use as part of my whitelist. I'm not trying to target any specific OS so please show one, show all. The list of browsers for desktops isn't exploding, but it does grow. I've only recently been made aware of other browsers that have multiple rendering engines. I'm not always on top of the text based browsers found out there either. I'm aware of the mobile browser platform and there is an active list used with regular expression for identification purposes that I will use as well as whatever I can find for the desktop platforms.

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• How to make the emacs not to pop up a window when using tab-completion?

  - by Jinx

  When I use the emacs shell mode or in gdb, when I type double tab, the emacs pop up a new window which always cover an existed window. While in terminal, when I type double tab, to complete a directory, the terminal just print all the candidates in the same window. Can I make the emacs not to pop up a new window when I use this feature? edit this is I wanna do , but it's wrong, can somebody fix this? ;remove annoying poped-up windows (defun rm-popup-window () (other-window) (kill-this-buffer) (other-window) ) (global-set-key [C-'] 'rm-popup-window);

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• Blender 2.63a window position unstable with dual monitor extended desktop

  - by Steve Smith

  I have two 1920 x 1200 HP monitors and running Ubuntu 12.10. If I set them up as an extended desktop, (both 1280 x 1024 positioned for 2048 x 1280, all my applications work fine EXCEPT Blender (even Inkscape). Blender works great on a single monitor but always defaults to a window size that uses all available real estate and it can't do that with 2048 x 1280. It launches, but jumps all over the screen. Does any know a way to start Blender in a fixed size window so it would run in just one monitor?

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• Hello world

  - by tikrimi

  Hello all bloggers and readers of Geekswithblogs.net. To introduce myself, my name is Christopher Bonnevault, I am a consultant for Valtech. I work with the platform. Net since 2002 mostly in Asp.Net. I am very interested by agile methods, and this blog will be an opportunity for me to share with you some feedback about the different tools that I use in my projects. English is not my native language, so I am sorry in advance if my posts are not always understandable.

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• Retrieve .Net Control ID in Javascript

  - by Vipin

  Originally posted on: http://geekswithblogs.net/Vipin/archive/2013/07/24/retrieve-.net-control-id-in-javascript.aspxIf you need to retrieve a client ID of an asp:net control in a javascript function, then you can use the below function - function $$(id, context) { var el = $("#" + id, context); if (el.length < 1) el = $("[id$=_" + id + "]", context); return el; }   var tempDotNetControl = 'aspTextTemporary';   var ClientSideID = $$(aspTextTemporary); Please bear in mind, this function is useful if you want to retrieve client ID of a different DotNet control based on some condition, otherwise if it’s always static then you can just use <%= aspTextTemporary.ClientID %>"

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• Projected trajectory of a vehicle?

  - by mac

  In the game I am developing, I have to calculate if my vehicle (1) which in the example is travelling north with a speed V, can reach its target (2). The example depict the problem from atop: There are actually two possible scenarios: V is constant (resulting in trajectory 4, an arc of a circle) or the vehicle has the capacity to accelerate/decelerate (trajectory 3, an arc of a spiral). I would like to know if there is a straightforward way to verify if the vehicle is able to reach its target (as opposed to overshooting it). I'm particularly interested in trajectory #3, as I the only thing I could think of is integrating the position of the vehicle over time. EDIT: of course the vehicle has always the capacity to steer, but the steer radius vary with its speed (think to a maximum lateral g-force). EDIT2: also notice that (as most of the vehicles in real life) there is a minimum steering radius for the in-game ones too).

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• How to stop getting too focused on a train of thought when programming?

  - by LDM91

  I often find myself getting too focused on a train of thought when programming, which results in me having what I guess could be described as "tunnel vision". As a result of this I miss important details/clues, which means I waste a fair amount of time before finally deciding the path I'm taking to solve the task is wrong. Afterwards, I take a step back which almost always results in me discovering what I've missed in a lot less time.. It's becoming really frustrating as it feels like I'm wasting a lot of time and effort, so I was wondering if anyone else had experienced similar issues, and had some suggestions to stop going down dead ends and programming "blindly" as it were!

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• Ubuntu 13.10 Security Key

  - by Toby J

  I was attempting to install Ubuntu 13.10 today and it came up with a screen asking for me to setup a security key. In the first place, I'm not sure what a security key is, but It said I would have to enter it everytime I booted Ubuntu so I assume it's the same thing as a logon password in Windows 8. Is there anyway I can bypass this step without setting up a security key or logon password? I hate these things and have always avoided them in Windows. I don't need them as there is never anyone but myself and my wife on our computers. We are retired, no children or nieces, nephews, friends, etc. who ever use our computer and we don't have any security information such as SS #, etc. on it. Also, I quit the installation at this point but I was not seeing any of the screen prompts as listed in the setup instructions on the Ubuntu website. Has the setup for Ubuntu 13.10 changed since these instructions were written? Thanks

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• How to make in CLI check for updates to be happening every 4 weeks and install them automatically without going to Software sources?

  - by Kangarooo

  I have a set of custom commands I run on my computers after I install them. How do I make Ubuntu check for updates every 4 weeks and install them automatically on check? I would need this done via command line so I can set it up for usual users when I set up their computers. The first command will make the update manager check for updates every 2 weeks because they not always come so much and to save the bandwidth of the Ubuntu servers. I also need to set it so that users don't need to click to install updates since it's tiring every time I help a friend set up a computer.

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• Is OO-programming really as important as hiring companies place it?

  - by ale

  I am just finishing my masters degree (in computing) and applying for jobs.. I've noticed many companies specifically ask for an understanding of object orientation. Popular interview questions are about inheritance, polymorphism, accessors etc. Is OO really that crucial? I even had an interview for a programming job in C and half the interview was OO. In the real world, developing real applications, is object orientation nearly always used? Are key features like polymorphism used A LOT? I think my question comes from one of my weaknesses.. although I know about OO.. I don't seem to be able to incorporate it a great deal into my programs. I would be really interested to get peoples' thoughts on this!

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• Which VCS is more applicable for our workflow?

  - by Thomas Mancini

  Currently we have code stored on a shared network drive and do not use any kind of VCS. The code stored on our shared network drive is always being backed up. We would like to keep things as close to they are now as possible, while using some kind of VCS software. I am envisioning a centralized workflow with each developer having a local copy of the code on his/her machine. We don't do any branching or working offline. Typically when we spin off a new version we would just copy the current working directory to a new directory. I believe we would continue doing this and just create a repository for the new version. I would rather not get into an argument over which VCS is better, just hoping to get some opinions for which is best suited and most applicable for what we are trying to do.

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• if ('constant' == $variable) vs. if ($variable == 'constant')

  - by Tom Auger

  Lately, I've been working a lot in PHP and specifically within the WordPress framework. I'm noticing a lot of code in the form of: if ( 1 == $options['postlink'] ) Where I would have expected to see: if ( $options['postlink'] == 1 ) Is this a convention found in certain languages / frameworks? Is there any reason the former approach is preferable to the latter (from a processing perspective, or a parsing perspective or even a human perspective?) Or is it merely a matter of taste? I have always thought it better when performing a test, that the variable item being tested against some constant is on the left. It seems to map better to the way we would ask the question in natural language: "if the cake is chocolate" rather than "if chocolate is the cake".

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• Load balancing on Ubuntu Server

  - by SabreWolfy

  I have Ubuntu 10.04.4 server (32-bit) installed on a headless quad-core machine with 2GB RAM. I'm running a command-line analysis which is analyzing a large amount of data, but which does not require a large amount of RAM. The tool does not provide any multi-threading, so the CPU load is sitting at 1.00 (or sometimes just a little over). I ran top and pressed 1 to see the load on each of the cores and noticed that "Cpu1" is always running at 100%. I thought that the load would be distributed between the cores, rather than loading one core all the time. I'm sure I've seen this load-balancing behaviour before in Ubuntu or Debian Desktop versions. Why would the Server edition work differently? The analysis will likely take several hours to run, so loading one core at 100% for many hours while the other 3 remain idle is surely not the best approach?

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• What route to take to become a systems developer?

  - by Ramin

  In the past I have done a lot of Java and Python coding. Mostly, I worked on web apps and some simple console or gui apps. I also have a formal education in computer science. What route should I take to become a systems developer? I always did like C++, but never had a chance to use it for anything. Would mastering C++ be one of the steps? If so what resources can you suggest? Also, I would like to know how much different is the work between plain old development and systems development. There seem to be a lot of overlapping between the two.

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• Why won't apt-get install anything after I deleted its cached lists?

  - by Gernot

  Recently I had a problem with the update-manager and search for a solution. On my search I found a post, where someone had the same problem and as solution they told him he should run this command on the terminal: sudo rm /var/lib/apt/lists/* I also run this, and the update-manager worked again. But now, I noticed that apt-get won't install anything. I wanted to install rvm (for ruby) and therefore I needed a few packages (build-essential and curl to be precise). But if I tried to install them, I always get the message that there is no installcandidate for that package... . What can I do to get apt-get working again?

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