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• ubuntu 12.04 internet stopped working

  - by Daniel

  My laptop was running smoothly until yesterday. Today, I can't connect to the internet at home anymore. I am only able to access the router, but no internet access. A have a Dell Latitude E6320 with ubuntu 12.04. At my job, I don't have any problems connecting this laptop both via wireless and ethernet. At home, if I try connecting it through Windows it does work fine. I even checked the MAC addess and it's OK. My other laptop, which also runs ubuntu, is not facing this problem. I have already tried to restart and downgrade network-manager package and its dependecies. Anyone can help me please??? I am affraid I will have to reinstall everything...

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• Get collision details from Rectangle.Intersects()

  - by Daniel Ribeiro

  I have a Breakout game in which, at some point, I detect the collision between the ball and the paddle with something like this: // Ball class rectangle.Intersects(paddle.Rectangle); Is there any way I can get the exact coordinates of the collision, or any details about it, with the current XNA API? I thought of doing some basic calculations, such as comparing the exact coordinates of each object on the moment of the collision. It would look something like this: // Ball class if((rectangle.X - paddle.Rectangle.X) < (paddle.Rectangle.Width / 2)) // Collision happened on the left side else // Collision happened on the right side But I'm not sure this is the correct way to do it. Do you guys have any tips on maybe an engine I might have to use to achieve that? Or even good coding practices using this method?

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• OpenGL Vertex Attributes - Normalisation

  - by Daniel

  Alas, I have searched, and have found no definitive answer. When would you normalize the vertex data in OpenGL using the following command: glVertexAttribPointer(index, size, type, normalize, stride, pointer); I.e when would normalize == GL_TRUE; what situations, and why would you choose to let the GPU do the calculations instead of preprocessing it? All examples I have ever seen, have this set to GL_FALSE; and I cannot personally see a use for it. But Khronos aren't stupid, so it must be there for something useful (and probably common).

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• When is it reasonable to create my own programming language?

  - by Daniel Rikowski

  Are there types of killer applications, classes of algorithmic problems, etc., where it is better, in the long run, to create my own language? PS: Just to be sure, I mean a new programming language and a compiler, not a new compiler for an existing language. EDIT: Thank you for the answers. Can you provide some examples, where it is absolutly unnecessary to create a DSL or cases in which a DSL might be a good idea?

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• How to recover an interrupted 12.04 upgrade from 11.10?

  - by martin

  Ok, I will get right to the point. I was upgrading ubuntu to 12.04 from 11.10 (x64) and right in the middle of the package installation I had a freeze (not ubuntu's fault) forcing me to do a hard reset of my pc. Now the ubuntu installation is completely broken I can only get access via recovery mode. I already tried "apt-get update && apt-get upgrade" and the option to fix broken packages. Nothing changed. So I'm wondering if its possible to fix the broken packages, or maybe to restore before the upgrade? Thank you in advance.

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• A simple example of movement prediction

  - by Daniel

  I've seen lots of examples of theory about the reason for client-side prediction, but I'm having a hard time converting it into code. I was wondering if someone knows of some specific examples that share some of the code, or can share their knowledge to shed some light into my situation. I'm trying to run some tests to get a the movement going (smoothly) between multiple clients. I'm using mouse input to initiate movement. I'm using AS3 and C# on a local Player.IO server. Right now I'm trying to get the Client side working, as I'm only forwarding position info with the client. I have 2 timers, one is an onEnterFrame and the other is a 100ms Timer, and one on mouseClick listener. When I click anywhere with a mouse, I update my player class to give it a destination point On every enterFrame Event for the player, it moves towards the destination point At every 100ms it sends a message to the server with the position of where it should be in a 100ms. The distance traveled is calculated by taking the distance (in Pixels) that the player can travel in one second, and dividing it by the framerate for the onEnterFrame handler, and by the update frequency (1/0.100s) for the server update. For the other Players, the location is interpolated and animated on every frame based on the new location. Is this the right way of doing it?

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• Does unit testing lead to premature generalization (specifically in the context of C++)?

  - by Martin

  Preliminary notes I'll not go into the distinction of the different kinds of test there are, there are already a few questions on these sites regarding that. I'll take what's there and that says: unit testing in the sense of "testing the smallest isolatable unit of an application" from which this question actually derives The isolation problem What is the smallest isolatable unit of a program. Well, as I see it, it (highly?) depends on what language you are coding in. Micheal Feathers talks about the concept of a seam: [WEwLC, p31] A seam is a place where you can alter behavior in your program without editing in that place. And without going into the details, I understand a seam -- in the context of unit testing -- to be a place in a program where your "test" can interface with your "unit". Examples Unit test -- especially in C++ -- require from the code under test to add more seams that would be strictly called for for a given problem. Example: Adding a virtual interface where non-virtual implementation would have been sufficient Splitting -- generalizing(?) -- a (smallish) class further "just" to facilitate adding a test. Splitting a single-executable project into seemingly "independent" libs, "just" to facilitate compiling them independently for the tests. The question I'll try a few versions that hopefully ask about the same point: Is the way that Unit Tests require one to structure an application's code "only" beneficial for the unit tests or is it actually beneficial to the applications structure. Is the generalization code need to exhibit to be unit-testable useful for anything but the unit tests? Does adding unit tests force one to generalize unnecessarily? Is the shape unit tests force on code "always" also a good shape for the code in general as seen from the problem domain? I remember a rule of thumb that said don't generalize until you need to / until there's a second place that uses the code. With Unit Tests, there's always a second place that uses the code -- namely the unit test. So is this reason enough to generalize?

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• Ubuntu Linux won't display netbook's native resolution

  - by Daniel

  FYI: My Netbook model is HP Mini 210-1004sa, which comes with Intel Graphics Media Accelerator 3150, and has a display 10.1" Active Matrix Colour TFT 1024 x 600. I recently removed Windows 7 Starter from my netbook, and replaced it with Ubuntu 12.10. The problem is the OS doesn't seem to recognise the native display resolution of 1024x600 i.e. the bottom bits of Ubuntu is hidden beneath the screen & the only 2 available resolutions are: the default 1024x768 and 800x600. I've also thought about replacing Ubuntu with Lubuntu or Puppy Linux, as the system does run a bit slow, but I can't, as then I won't be able to access the taskbar and application menu which will be hidden beneath the screen. Only Ubuntu with Unity is currently usable, as the Unity Launcher is visible enough. I was able to define a custom resolution 1024x600 using the Q&A: How set my monitor resolution? but when I set that resolution, there appears a black band at the top of the screen and the desktop area is lowered, with bits of it hidden beneath the screen. I tried leaving it at this new resolution and restarting the system to see if the black band would disappear & the display will fit correctly, but it gets reset to 1024x768 at startup and displays following error: Could not apply the stored configuration for monitors none of the selected modes were compatible with the possible modes: Trying modes for CRTC 63 CRTC 63: trying mode 800x600@60Hz with output at 1024x600@60Hz (pass 0) CRTC 63: trying mode 800x600@56Hz with output at 1024x600@60Hz (pass 0) CRTC 63: trying mode 640x480@60Hz with output at 1024x600@60Hz (pass 0) CRTC 63: trying mode 1024x768@60Hz with output at 1024x600@60Hz (pass 1) CRTC 63: trying mode 800x600@60Hz with output at 1024x600@60Hz (pass 1) CRTC 63: trying mode 800x600@56Hz with output at 1024x600@60Hz (pass 1) CRTC 63: trying mode 640x480@60Hz with output at 1024x600@60Hz (pass 1) Trying modes for CRTC 64 CRTC 64: trying mode 1024x768@60Hz with output at 1024x600@60Hz (pass 0) CRTC 64: trying mode 800x600@60Hz with output at 1024x600@60Hz (pass 0) CRTC 64: trying mode 800x600@56Hz with output at 1024x600@60Hz (pass 0) CRTC 64: trying mode 640x480@60Hz with output at 1024x600@60Hz (pass 0) CRTC 64: trying mode 1024x768@60Hz with output at 1024x600@60Hz (pass 1) CRTC 64: trying mode 800x600@60Hz with output at 1024x600@60Hz (pass 1) CRTC 64: trying mode 800x600@56Hz with output at 1024x600@60Hz (pass 1) CRTC 64: trying mode 640x480@60Hz with output at 1024x600@60Hz (pass 1)

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• How do Unity 12.04/Compiz bindings really work?

  - by Daniel

  There is a bewildering array of places to set bindings, all inconsistent with one another. E.g. in Unity's System Settings having the Ctrl-key highlight the mouse position is an on/off choice. I like the feature, but not on such a prominent key where I keep activating it accidentally. The keyboard shortcuts allow only one binding per command, where I might like a convenient one on the external keyboard and an emergency alternative for when I'm on the road. Keyboard custom shortcuts has a nice interface, but allows only key bindings — besides it doesn't seem to work for me. So I activated CCSM Commands. There I have the choice of key-, mouse- and/or edge bindings. Whereas some places in CCSM offers only one or two of these binding possibilities, randomly at the whim of the programmer. I have not found a way to differentiate a mouse-drag from a click. E.g. I want <SuperMouse1-drag anywhere on a window to move it, while if I don't drag, it should be raise-lower. On the title bar I want the same without needing the <Super key. Now I find raise-lower only in System Settings where I can't assign a mouse binding. If therefore in CCSM I fallback to only lower and put move on the same binding, the window already gets lowered on mouse down, and I can then invisibly move it. Very useful! I have <Altasciicircum get in the way of an Emacs binding, with some to me useless popup overlay. I can find it nowhere, so I can't turn it off. So how can I go without these frontends until they have matured, and instruct Compiz directly, for example in the way Emacs or Sawfish have keymaps, and separate ones for each context, with inheritance?

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• How should I set up UDK with Git and CruiseControl?

  - by Martin Sojka

  For a new project in UDK, I'd like to set up a Git repository for version control and a CruiseControl.NET-based continuous integration solution. The good news is that he first part seems easy enough and CruiseControl.NET can work off Git repositories. The bad news is that according to my searches, nobody has ever tried to do this. Ideally, I'm looking for a step-by-step guide on how to set up such a development environment assuming more than one development computer, one central repository for the "master" branch, and one machine for building and packaging the binaries via CruiseControl.NET. Related: Version control system for game development with UDK? Options for UDK and version control repositories? CruiseControl.NET and Git

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• unable to boot and boot-loop on splash screen

  - by Joel St Martin

  hey i have tried to install ubuntu many times, but once it installs it boot-loops at the splash screen. it just loops through the boot sound and the screen not sure why. nothing has seemed to work. also its only alowing me to boot windows all other oporating systems crash and loop just like ubuntu (android x86, linux mint, red hat, ubuntustudio). compac amd 64 3400+ 1gig ram 2 hhd (200 gig/120 gig) 1 ssd (500gig) win7 x86 a video showing what happens

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• Are there any significant advantages to using a native language for mobile app development?

  - by Karl Daniel

  Forgive me if this question has already been answered but I couldn't quite find the answer I was looking for. What I wanted to know was, is there any significant advantage to using a native language when developing and deploying apps to a mobile environment? The reason I ask is for a long while now I've been using Objective-C, Apple's native language for iOS, to build my apps. However I've been wondering whether or not there is any real benefit to doing this, over using a non-native language like JavaScript and then deploying it through a service like 'Phone Gap'? I do stress 'significant' advantages as native languages are always more likely to have the upper hand when it comes to speed and access to the latest APIs. However in general I don't see using a non-native language or a service like 'Phone Gap' causing and major slow down to my apps or restricting my development. Additionally having the ability to deploy to multiple services is also very handy indeed. This is why I put the question, are there any significant advantages to using a native language for mobile app development?

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• Grails project structure

  - by Martin Janicek

  Good news everyone! I've changed the structure of the Grails project as requested in the issue 160028 and it should be much more user friendly than before. There are actually two things I've fixed/implemented. First of all the source folders are finally represented in the same way as for the Java projects (which means instead of the folder based structure it uses package based structure). The difference can be seen on pictures bellow:    Folder based structure:                                                 Package based structure: Second, minor and quite related change could be seen on those pictures too. There are different icons for different structures. For example Views and Layouts items are folder based, Domain Classes are package based and so on.

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• How do I get "ruby" to do what "ruby1.9.1" does?

  - by Daniel

  I want to start off by saying... I really don't need to be using 1.9.2. I understand that you don't ever, ever use Python 3.2, so if the common advice is that I should use 1.8, I'll do that. But don't tell me to do that because it's easier. Whatever version I should be using, though, the question is still relevant: What's a good way to make one command do another command? (I suppose I could write a c program to launch ruby1.9.1, call the executable ruby, and put it in my bin, but this seems like less than a good idea)

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• How can a programmer refine their skills in non-visual ways?

  - by Martin Josefsson

  I feel like when I am not writing, I am reading. When I come home from my programming job I write and read software and about software. The problem is though, both reading and writing requires my eyes to be focused. That doesn't work when I'm biking, cooking shopping for groceries. Sometime I use text-to-speech programs to listen to blogs, but I feel like there could be more. What ways can a software developer learn more without requiring eye focus? How to blind coders learn the craft?

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• What are options for 3rd Party Centralized Software Settings Management?

  - by Jeff Martin

  I am an architect in an enterprise looking to build a SaaS solution. Our products are distributed over many different deployable containers, Web Services, Web UI's, etc. I am looking for some open-source or 3rd party software solution to manage the settings of our application. These would be similar to the settings you might find in Word or Eclipse or Visual Studio. The settings would control various behaviors and features of the product. (Probably not settings like which database to connect to but more like, should I show line numbers on the page or not by default..). Ideally, we would be able to store values for different dimensions (by tenant, by user, by application environment... ) Because we have so many different deployables, I am looking for a centralized solution that can provide a web service that each of the deployables can get their individual settings from. Does anyone know of a centralized service providing this sort of features or give me some help in searching for an alternative to rolling our own?

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• Internet stopped working suddenly on 12.04

  - by Daniel

  My laptop was running smoothly until yesterday. Today, I can't connect to the Internet at home anymore. I am only able to access the router, but no Internet access. A have a Dell Latitude E6320 with Ubuntu 12.04. At my job, I don't have any problems connecting this laptop both via Wireless and Ethernet. At home, if I try connecting it through Windows, it does work fine. I even checked the MAC address and it's OK. My other laptop, which also runs Ubuntu, is not facing this problem. I have already tried to restart and downgrade network-manager package and its dependencies. Can anyone help me please? I am afraid, I will have to reinstall everything.

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• Why did the web win the space of remote applications and X not?

  - by Martin Josefsson

  The X Window System is 25 years old, it had it's birthday yesterday (on the 15'th). As you probably are aware of, one of it's most important features is the separation of the server side and the client side in a way that neither Microsoft's, Apples or Wayland's windowing systems have. Back in the days (sorry for the ambiguous phrasing) many believed X would dominate over other ways to make windows because of this separation of server and client, allowing the application to be ran on a server somewhere else while the user clicks and types on her own computer at home. This use obviously still exists, but is marginalized at best. When we write and use programs that run on a server we almost always use the web with it's html/css/js. Why did the web win, and X not? The technologies used for the web (said html/css/js) are a mess. Combined with all the back-end-frameworks (Rails, Django and all) it really is a jungle to navigate thru. Still the web thrives with creativity and progress, while remote X apps do not.

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• How do I get started with HTML5 when I come from a Flash background?

  - by daniel.sedlacek

  How do I convert Flash web applications to HTML 5? What is the recommended workflow to learn HTML5? What tools should I install? What SDK? Where to start? How to test? How to debug? What do I read? I'm familiar with Eclipse, should I install Aptana? If yes, what's next? I would like to start lightweight but I would also like to learn the good practices from the beginning. UPDATE: I understand that what is often labelled as "HTML5 development" is in fact a mixture of HTML, CSS, JS and more, however I don't believe that bigger projects are developed in Notepad. That is why I am asking you to reveal your tips and tricks about your workflow.

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• How do I fix broken installation?

  - by Daniel

  Let me start off by saying I'm dual booting 11.04 and Windows 7 on a Thinkpad T61p. The problem may have arisen when I hit the power button during normal startup. I'm fully aware how stupid this is. I don't know why I did it. I did it. Now, I can't get in to Ubuntu. Windows works fine. But when I try to start Ubuntu normally, it seems to run some checks, and does not start up. Sometimes, I see a black screen, and it tells me that it's running certain checks, and then, [ok]. Like... Battery Check Somethingorother [ok] It'll give me 1-5 of these. And then it just does nothing, and I have to turn it off. When I try to start in safe mode... I tried low graphics mode, and after going through a couple of dialogue boxes, I'm brought right back to the safe mode dialogue box. And if I hit 'resume,' a shell pushes up (still that grey on black "your computer is broken" type shell) and asks me to log in. I do, and try to run unity. It tells me something along the lines of: WARNING no DISPLAY variable set and then sets it to " :0" , which doesn't work. And then I can't do anything, really, and I have to restart. (I don't know how to do this from the command line, so I just hard reset. That command would be helpful). Does anybody have any idea how I can get Ubuntu working right again? FTP is less pleasant in Explorer than it is in Nautilus or w/e it is now.

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• How to Update Remote Diagnostic Agent (RDA) to Latest Version?

  - by Daniel Mortimer

  Remote Diagnostic Agent (RDA) 4.28 was released on 12th June. Full details can be found in this My Oracle Support documentRDA 4 Release Notes [ID 414970.1]From a Fusion Middleware Core Component, Install and Administration perspective this latest release does not offer any significant new features or changes. However, despite the lack of Fusion Middleware specific new features in version 4.28, Remote Diagnostic Agent still comes as highly recommended. It is incredibly useful problem solving / troubleshooting aid. Support engineers dealing with Service Requests often request RDA output as it collects just about everything you might need to get a view of the state and configuration of the host operating system, network setup and Fusion Middleware components. To find out more take a look at Running RDA Against Oracle Fusion Middleware 11g [ID 853437.1] Getting Started With Remote Diagnostic Agent: Case Study - Oracle WebLogic Server (Video) [ID 1262157.1] Note: While the latter document looks at RDA from the perspective of WebLogic Server, much of the advice given in the videos can be applied to other Fusion Middleware products.Ok, let's get back on track with the topic suggested by the title. If you are already familiar with Remote Diagnostic Agent you may ask the question - 'How do I keep my RDA at the latest version?' The answer is in "Running RDA Against Oracle Fusion Middleware 11g [ID 853437.1]". To quote: There are two methods: 1. Upgrade RDA via OCM (Oracle Configuration Manager) Refer to the advice given in: Remote Diagnostic Agent (RDA) Upgrade README [ID 1309034.1] OR 2. Manually download and upgrade to the latest version. To quote from Remote Diagnostic Agent (RDA) 4 - FAQ [ID 330363.1] +++++++++++++++++++++++++++++++++++++++++++++++++++++++ How do I upgrade my RDA 4.x installation from the prior release? The most simplest and reliable way to upgrade your RDA installation is delete or move your old installation to a new location. Then install the new release into the location you had the prior release installed. If you want to reuse you old setup.cfg file, you can place the older version into the new <rda> directory and it will try to upgrade your setup.cfg to the new features. A second approach is to install the latest RDA into another directory, then if needed copy the old setup.cfg file to the new RDA directory. When the new RDA is run for the first time, it will try to upgrade your setup.cfg to the new features. +++++++++++++++++++++++++++++++++++++++++++++++++++++++ The upgrade method via Oracle Configuration Manager is nice because it allows RDA to be auto updated whenever a new release of RDA is made available (which roughly speaking is every 3 months). However, it does require you to install and configure Oracle Configuration Manager in addition to RDA. A quick guide to Fusion Middleware 11g and OCM can be found in this support document.Configuring OCM in Oracle Fusion Middleware 11g? A Quick and Easy Guide [ID 1096871.1]

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• How to optimize calls to multiple APIs at once and return as one set?

  - by Martin

  I have a web app that searches across 2 APIs right now. I have my own Restful web service that I call, and it does all the work on the backend to asynchronously call the 2 APIs and concatenate them into one result set for my web app to use. I want to scale this out and add as many other APIs as I can (currently looking at about 10 more). But as I add APIs, the call to my service gets (potentially) slower and more complex. How do I handle one API not responding ... and other issues that arise? What would be the best way to approach this? Should I create a service call for each API, that way each one is independent and not coupled to all the other calls? Is there a way on the backend to handle the multiple API calls without all the extra complexity it adds? If I go the route of a service call per API, now my client code gets more complex (and I have a lot of clients)? And it's more work for the client, and since I have mobile apps, it will cost the client more data usage. If I go one service call, is there a way to set up some sort of connection so I can return data as I get it, in case one service call hangs?

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• Problems syncing photos and strange effects of uploaded files from other devices

  - by Daniel

  I have a Galaxy Spica (GT-i5700) Android v2.1, rooted with Leshak dev 7 #123. But never mind the root info, the problem would be the same unrooted. The photos from this phone is stored in "sdcard/images", nevertheless the phone also creates a "sdcard/DCIM" but only stores some thumbnails there. Problem nr 1: U1 only reads the DCIM-folder for automatic photo-upload. So photos stored in this phone is not uploaded. If I move photos to "DCIM" folder, U1 recognises the photos and start uploading them. Possible solution: Could there be an option in the settings, to set preferred photo folder? Problem nr 2: Out of 74 pictures, 12 did not get uploaded. Pressing "Retry failed transfers" in Settings does nothing. Pressing the files where status is "Upload failed, tap to retry" only changes the status to "Uploading..." but nothing gets uploaded. If I upload another file to U1, it is uploaded directly without any problem. It has nothing to do with file size, 1,1 MB files has been uploaded fine whilst some failed are 0,8 MB. Problem nr 3: The photos from DCIM are in my case uploaded to a folder called "Pictures - GT-I5700" in U1. If I log in to the homepage and from there upload another photo in "Pictures - GT-I5700", it shows up in U1 on my phone fine. But when I tap it, U1 downloads the photo to "sdcard/U1/Pictures - GT-I5700". If it sync photos from "sdcard/DCIM" to a specific folder, why not also download files to the same folder from which it is synced? After a while of usage, syncing and uploading files from different clients it would be a mishmash of folders and places files are stored and considering that I see no use of U1 at all. Another question: If my SD card in some way breaks down/some folders cannot be read/card temporarly changed and U1 is running, does U1 consider that as files deleted and also delete from the cloud?

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• New Information Center - Optimize Performance of FMW 11g

  - by Daniel Mortimer

  Following on the heels of the recently published - "Reviewing Security for FMW 11g" Information Center, we are pleased to announce the publication of Information Center: Optimizing Performance of Oracle Fusion Middleware 11g [ID 1469617.2] Screenshot of ID 1469617.2 We are in the process of making further tweaks and changes to improve the other ** "Oracle Fusion Middleware 11g" Information Centers. So watch this space! ** You can navigate to these other Information Centers via the menu found on the left hand side of the "Optimize Performance" Information Center.

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• Add References with Search

  - by Daniel Cazzulino

  If you have been using VS2010 for any significant amount of time, you surely came across the awkward, slow and hard to use Add Reference dialog. Despite some (apparent) improvements over the VS2008 behavior, in its current form it's even LESS usable than before. A brief non-exhaustive summary of the typical grief with this dialog is: Scrolling a list of *hundreds* of entries? (300+ typically) No partial matching when typing: yes, you can type in the list to get to the desired entry, but the matching is performed in an exact manner, from the beginning of the assembly name. So, to get to the (say) "Microsoft.VisualStudio.Settings" assembly, you actually have to type the first two segments in their entirety before starting to type "Settings"....Read full article

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