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• Is there a framework for describing object oriented communication standards/protocols?

  - by martin

  Currently I'm dealing with the development of specifications for communication standards/protocols for b2b-integration based on object oriented models. I.e. if you take a look at the healthcare domain there is HL7v3 with its HDF. Now I ask if there is a more generic framework, that describes how a specification for a communication standard should be developed. For b2b-integration I want to describe a communication standard based on uml models for a broad domain. My thought was to divide the domain into subdomains and derive message type from the resulting model. There is already a given framework, but I want to compare it to another framework. My idea is to compare them using a generic framework. It should describe several levels. Does anybody know such a framework? I have searched a while on google scholar, but haven't an appropiate framework yet. The only thing I have found is ebXML, but I think it is not exactly what I need.

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• Are there any real-world cases for C++ without exceptions?

  - by Martin

  In When to use C over C++, and C++ over C? there is a statement wrt. to code size / C++ exceptions: Jerry answers (among other points): (...) it tends to be more difficult to produce truly tiny executables with C++. For really small systems, you're rarely writing a lot of code anyway, and the extra (...) to which I asked why that would be, to which Jerry responded: the main thing is that C++ includes exception handling, which (at least usually) adds some minimum to the executable size. Most compilers will let you disable exception handling, but when you do the result isn't quite C++ anymore. (...) which I do not really doubt on a technical real world level. Therefore I'm interested (purely out of curiosity) to hear from real world examples where a project chose C++ as a language and then chose to disable exceptions. (Not just merely "not use" exceptions in user code, but disable them in the compiler, so that you can't throw or catch exceptions.) Why does a project chose to do so (still using C++ and not C, but no exceptions) - what are/were the (technical) reasons? Addendum: For those wishing to elaborate on their answers, it would be nice to detail how the implications of no-exceptions are handled: STL collections (vector, ...) do not work properly (allocation failure cannot be reported) new can't throw Constructors cannot fail

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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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• Is it possible to hide some topics in phpBB forum?

  - by Martin

  I would like to be able to hide some of the topics in a phpBB-based forum temporarily from the users - perhaps with the exception of administrators and moderators. I am using the forum for my students and I have solutions of some problems from exams and tests there - posted either by me or by some of the students. I plan to use the same or very similar problems during the next academic year. So I don't want the students to see them, but I want to make the solutions visible again after the tests; so that I do not have to post solutions to same questions again. Is something like this possible? Is this a standard part of phpBB, or do I need to install some modification(s) for it?

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• How can I support the creation and rendering of both interior and exterior environments?

  - by Nick

  Say I already have a renderer that can support outdoor terrain and environment rendering. How would I go about adding support for interior environments (for example, like World of Warcraft's dungeons) to my game? I'm interested both in how I should fit the interiors into my content creation process (for example, I thought about leaving holes in the terrain mesh into which I can "paste" the interior dungeon mesh at runtime) and how to render them (it seems like I'd want a different rendering flow other than a blended texture rendering phase that terrain uses).

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• Way to make video-thumbnails generate from VLC instead of Totem?

  - by nick

  I'm suffering from problem that video-thumbnails do not appear in nautilus for some video files. I just found this bug typefinding: some mpeg files are not identified as mpeg files which seems to address the problem. I don't understand the specifics as reported in this bug report, but it sounds like it's a problem with Totem's interaction with Gstreamer. Since all my videos play fine with VLC (and they don't all play with Totem), I don't use Totem very much. Is there a way to make VLC generate the video-thumbnails instead of having to rely on the buggy gstreamer/totem? I made VLC my default video player but this had no effect on the display of video-thumbnails. If Totem can't play the video file, then I get no thumbnail. But VLC can play the videos fine, so why can't VLC create a video-thumbnail for it?

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• Is it bad practice to output from within a function?

  - by Nick

  For example, should I be doing something like: <?php function output_message($message,$type='success') { ?> <p class="<?php echo $type; ?>"><?php echo $message; ?></p> <?php } output_message('There were some errors processing your request','error'); ?> or <?php function output_message($message,$type='success') { ob_start(); ?> <p class="<?php echo $type; ?>"><?php echo $message; ?></p> <?php return ob_get_clean(); } echo output_message('There were some errors processing your request','error'); ?> I understand they both achieve the same end result, but are there benefits doing one way over the other? Or does it not even matter?

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• Can we compare programming languages ergonomically?

  - by Nick Rosencrantz

  For instance, would Python be a more ergonomic programming language since it doesn't force you to make curly braces which requires the AltGr key. Also Python usually requires less code to achieve the same or am I being biased towards Python and PHP actually is an ergonomical and comfortable language despite forcing the programmer to use the AltGr key? Isn't forcing the programmer to use the AltGr key not very ergonomical?

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• Toshiba Satellite a300 with Maverick keeps crashing.

  - by Martin

  I just installed 10.10 on my girlfriends Toshiba Satellite a300 and for about two days it has been working just fine for two days but today it started acting pretty wonky. Several times over the machine just dies as if it didn't have a battery and someone yanked out the power supply. After such a crash I'll have to wait a while before powering it up again or it will die before it even reaches the startup screen. It sort of seems like it's reacting to something I do. I kept it on for several hours while we were out of the house and it was still fine when I came back. I haven't been doing anything I can imagine is especially CPU-intensive when the crashes occur, but I have been trying to set up her iPod with Rythmbox and / or Banshee. If anyone can point me in the right direction I'd be very grateful.

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• What subject do you discuss with your manager during a one-on-one?

  - by Martin

  Every week, I have a 30 minutes meeting scheduled with my manager to talk about pretty much anything. So far, I haven't taken those one-on-one very seriously. As a new year resolution, I would like to take more seriously my one-on-ones with my manager. One way I though I could do that is to plan in advance (come up with a list of questions and/or agenda) my one-on-one. With the exception of the status report, what subject do you discuss with your manager during a one-on-one? Have you ever seen an agenda for one-on-one?

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• Problem with setting up a bootable USB on corrupted OSX

  - by Nick

  I cant access the desktop because my harddrive is corrupted. Therefore I want to make a bootable USB stick so i can transfer all of my important files to my External HD. Problem is that Im stuck on Step 3 --- http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx . Im not sure of what i should change this to: hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso It says convert failed - No such file or directory. Obviously the problem is that i dont know the path to the USB, maybe you know how to find out? Please help me. Thanks. ps. Ive downloaded the ubuntu desktop amd64+mac. pps. Unetbootin is a different alternative, but i dont know if it works?

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• Deferred rendering order?

  - by Nick Wiggill

  There are some effects for which I must do multi-pass rendering. I've got the basics set up (FBO rendering etc.), but I'm trying to get my head around the most suitable setup. Here's what I'm thinking... The framebuffer objects: FBO 1 has a color attachment and a depth attachment. FBO 2 has a color attachment. The render passes: Render g-buffer: normals and depth (used by outline & DoF blur shaders); output to FBO no. 1. Render solid geometry, bold outlines (as in toon shader), and fog; output to FBO no. 2. (can all render via a single fragment shader -- I think.) (optional) DoF blur the scene; output to the default frame buffer OR ELSE render FBO2 directly to default frame buffer. (optional) Mesh wireframes; composite over what's already in the default framebuffer. Does this order seem viable? Any obvious mistakes?

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• Groovy JUnit test support

  - by Martin Janicek

  Good news everyone! I've implemented support for the Groovy JUnit tests which basically means you can finally use Groovy in the area where is so highly productive! You can create a new Groovy JUnit test in the New File/Groovy/Groovy JUnit test and it should behave in the same way as for Java tests. Which means if there is no JUnit setup in your project yet, you can choose between JUnit 3 and JUnit 4 template and with respect to your choice the project settings will be changed (in case of the Maven based projects the correct dependencies and plugins are added to the pom.xml and in case of the Ant based project the JUnit dependency is configured). Or if the project is already configured, the correct template will be used. After that the test skeleton is created and you can write your own code and of course run the tests together with the java ones. Some of you were asking for this feature and of course I don't expect it will be perfect from the beginning so I would be really glad to see some constructive feedback about what could be improved and/or redesigned ;] ..at the end I have to say that the feature is not active for the Ant based Java EE projects yet (I'm aware of it and it will be fixed to the NetBeans 7.3 final - actually it will be done in a few days/weeks, just want you to know). But it's already complete in all types of the Maven based projects and also for the Ant based J2SE projects. And as always, the daily build where you can try the feature can be downloaded right here, so don't hesitate to try it!

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• How can I remove a Unity window entry?

  - by Pol Delgado Martin

  I installed Eclipse long time ago from the Software Center, but recently I needed a newer version than the repo one. Then I removed it via Software Center and installed Eclipse Kepler in /opt. However, the window opened is not called Eclipse, it is the name of an old program I made (Eclipse- GMM). However, that's not the main issue, but that even if I created a .desktop file it launches the same, having "two" eclipses in the dock, the actual program and the launcher. How can I remove Unity .desktop cache or wathever it is this?

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• Unity launcher full - Need more icons

  - by Martin Wildam

  I have already reduced the Unity launcher icons to 32 but still the space is exhausted already with my most-used programs. Basically I have to scroll often in the unity launcher bar with is annoying. So far (Ubuntu 10.04) I had those icons as mini ones in the top panel (smaller icons and wider space) where they could fit all. I was thinking already of sub-launchers or something the like but could not find something like the drawer was in Gnome 2. I am using Ubuntu at home and in the office. I am a consultant and need a lot of stuff on a regular basis. To put links at the desktop does not make sense because of the many windows that I usually have open there is hardly ever a piece of the desktop looking through. How do you - power users get keep most-used programs at reach (and I mean <= 2 clicks away)?

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• How does Minecraft render its sunset and sky?

  - by Nick

  In Minecraft, the sunset looks really beautiful and I've always wanted to know how they do it. Do they use several skyboxes rendered over eachother? That is, one for the sky (which can turn dark and light depending on the time of the day), one for the sun and moon, and one for the orange horizon effect? I was hoping someone could enlighten me... I wish I could enter wireframe or something like that but as far as I know that is not possible.

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• BDD in a .NET environment

  - by Nick

  I've seen BDD in action (in this case using SpecFlow and Selenium in a .NET environment) for a small test project. I was very impressed - mainly due to the fact that the language used to specify the acceptance tests meant they engaged with the product owner much more easily. I'm now keen to bring this into my current organisation. However I'm asked 'who else uses this?' and 'show me some case-studies'. Unfortunately I cannot find any 'big names' (or even 'small names' for that matter!) of companies who are actively using BDD. I have two questions really: Is BDD adopted by companies out there? Who are they? How can BDD be implemented in an agile .NET environment and are there any significant drawbacks to doing it?

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• What causes the iOS OpenGLES driver to allocate extra memory?

  - by Martin Linklater

  I'm trying to optimize the memory usage of our iOS game and I'm puzzled about when/why the iOS GLES driver allocates extra memory at runtime... When I run our game through Instruments with the OpenGL ES Driver instrument the gartUsedBytes value can fluctuate quite wildly. We preload all our textures and build the buffer objects up front, so it's not the game engine requesting extra memory from GL. Currently we are manually requesting around 50MB of GL memory, yet the gartUsedBytes value sits at around 90MB most of the time, peaking at 125MB from time to time. It seems to be linked to what you are rendering that frame - our PVS only submits VBO's for visible meshes. Can anyone shed some light on what the driver is doing in the background ? Like I said earlier, all our game engine allocations are done on level load, so in theory there shouldn't be any fluctuation on GL memory usage while the level is running. Thanks.

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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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• 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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• 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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• 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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• Understanding Asynchronous Programming with .NET Reflector

  - by Nick Harrison

  When trying to understand and learn the .NET framework, there is no substitute for being able to see what is going on behind at the scenes inside even the most confusing assemblies, and .NET Reflector makes this possible. Personally, I never fully understood connection pooling until I was able to poke around in key classes in the System.Data assembly. All of a sudden, integrating with third party components was much simpler, even without vendor documentation!With a team devoted to developing and extending Reflector, Red Gate have made it possible for us to step into and actually debug assemblies such as System.Data as though the source code was part of our solution. This maybe doesn’t sound like much, but it dramatically improves the way you can relate to and understand code that isn’t your own.Now that Microsoft has officially launched Visual Studio 2012, Reflector is also fully integrated with the new IDE, and supports the most complex language feature currently at our command: Asynchronous processing.Without understanding what is going on behind the scenes in the .NET Framework, it is difficult to appreciate what asynchronocity actually bring to the table and, without Reflector, we would never know the Arthur C. Clarke Magicthat the compiler does on our behalf.Join me as we explore the new asynchronous processing model, as well as review the often misunderstood and underappreciated yield keyword (you’ll see the connection when we dive into how the CLR handles async).Read more here

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• In a browser, is it best to use one huge spritesheet or many (10000) different PNG's?

  - by Nick

  I'm creating a game in jQuery, where I use about 10000 32x32 tiles. Until now, I have been using them all separately (no sprite sheet). An average map uses about 2000 tiles (sometimes re-used PNG's but all separate divs) and the performance ranges from stable (Chrome) to a bit laggy (Firefox). Each of these divs are positioned absolutely using CSS. They do not need to be updated every tick, just when a new map is loaded. Would it be better for performance to use spritesheet methods for the divs using CSS background-positioning, like gameQuery does? Thank you in advance!

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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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