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• How to persistently export an environment variable before starting compiz

  - by Dykam

  A few months ago compiz suddenly stopped working. That is, it got to a refreshrate where the redrawing is more than noticeable. It took 5 seconds to redraw a chat window. Ever since I've been using metacity instead, but I've found myself missing some plugins badly. I found the following solution: export __GL_YIELD="NOTHING"; compiz --replace This works fine, everything is fast again with compiz. But how to make sure this variable is always set whenever I run compiz? I'm using standard nVidia drivers, failed to get the open source ones working.

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• Support du HTML5 : Opera, Firefox, Maxthon et BlackBerry les plus complets sur mobiles, tablettes et PC d'après un comparatif hollandais

  Support du HTML5 : Opera, Firefox, BlackBerry et Maxthon les plus complets Sur mobiles, tablettes et PC d'après un comparatif hollandais Bien sûr, un seul test ne vaut pas parole d'évangile. Mais celui-ci, vu le nombre de critères qu'il intègre, a tout de même son intérêt. A l'origine, le site HTML5test mesure les performances des navigateurs dans leurs supports du standard Web. Le résultat est présenté sous la forme d'un score, dont le maximum est de 500 points, détaillé ensuite balise par balise et fonctionnalité par fonctionnalité (canvas, vidéo, forms, glisser-déposer, cache, etc.). Sights, la société Néerlandaise derrière ce site, a décidé de publ...

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• Content of AUTHORS file

  - by user14284

  GNU recommend make AUTHORS file for list of authors and contributos of a program. But how many "levels" of authors and contributors should contain the file? E.g. I write a program foo, that actively use some library. Should I include authors of the library in the AUTHORS? It seems to yes, because total code of foo contain code from library. But if yes, I should include also authors of all others libraries, including standard libraries of compiler, authors of the compiler and other tools for producing final executable code, authors of OS... When I should stop?

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• Good way of handling class instances in game development?

  - by Bugster

  I'm a new indie game developer, and I've made a few games, but often times when coding I wonder "Is this the way most people do it? Am I doing it wrong?" because I'd like to become a game developer some day, and I really want to get rid of bad practices in time. The way I'm doing it right now is like this: #include <some libraries> #include "Some classes" int main() { Class1 a; Class2 b; Class3 c; a.init(); b.init(); c.init(); // game logic; } Now as I see the game grow, I have more and more classes to initialize and create instances of. This is clean but I'm not sure if this is standard practice. Is this a regular way of creating instances of your game classes or is there a cleaner and more efficient way to do it?

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• Should Equality be commutative within a Class Hierachy?

  - by vossad01

  It is easy to define the Equals operation in ways that are not commutative. When providing equality against other types, there are obviously situations (in most languages) were equality not being commutative is unavoidable. However, within one's own inheritance hierarchy where the root base class defines an equality member, a programmer has more control. Thus you can create situations where (A = B) ? (B = A), where A and B both derive from base class T Substituting the = with the appropriate variation for a given language. (.Equals(_), ==, etc.) That seems wrong to me, however, I recognize I may be biased by background in Mathematics. I have not been in programming long enough to know what is standard/accepted/preferred practice when programming. Do most programmers just accept .Equals(_)may not be commutative and code defensibly. Do they expect commutativity and get annoyed if it is not. In short, when working in a class hierarchy, should effort me made to ensure Equality is commutative?

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• Database Context and Singleton injection with IoC

  - by zaitsman

  All of the below relates to a ASP.NET c# app. I have a Singleton Settings MemoryCache that reads values from database on first access and caches these, then invalidates them using SQL Service Broker message and re-reads as required. For the purposes of standard controllers, i create my Db Context in a request scope. However, this obviously means that i can't use the same context in the Settings Cache class, since that is a singleton and we have a scope collision. At the moment, i ended up with two db contexts - the Controllers get it via IoC container, whereas a Singleton just creates it's own. However, i am not satisfied with this approach (mostly due to the way i feel about two contexts, the cache doesn't set anything on the db hence concurrency is not an issue as much). What is a better way to do it?

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• Desktop not showing after playing with compiz

  - by Mark

  Having successfully installed Ubuntu 11.04 I decided to look into improving look and feel of the unity desktop. I could find no option to introduce any nice effects with the standard install, but a google session suggested Compiz would do the job. I installed this and selected the "Wobbly windows" option and this worked fine. After a while I thought I'd try some of the other available effects (can't remember which but may have been cube desktop) but this resulted in no windows showing at all. I now have just blank wall paper with no icons or menus. There are no error messages and right clicking the desktop produces a small context menu but nothing else. Rebooting brings me back to a blank desktop with just wallpaper. I do not know where to start.

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• Calculating Values within a Rolling Window in Transact SQL

  Before the SQL Window functions were implemented, it was tricky to calculate rolling totals or moving averages efficiently in SQL Server. There are now a number of techniques, but which has the best performance? Dwain Camps gets out the metaphorical stopwatch. Get your SQL Server database under version control now!Version control is standard for applications, but databases haven’t caught up. So how can you bring database development up to speed? Why should you start? Find out…

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• Limitation of high level languages? [closed]

  - by user1705796

  My question may look bit philosophical and nonsense! But I need to know kind of instructions those are not well suitable in high level languages even in c? Or rarely use in the development of software? Like read/write content of CPU registers may useful in debugging programs. And access to cache memory required when developing OS (maybe I am wrong at this point). Is this kind of instruction available languages like Java, Python, C? I also have a second question: And Why all high level languages not having same uniform syntax; at-least same standard library interface name? In python there is and. Or operator is almost same as && and ||. I think Python is developed after C but space indentation is compulsory in Python. Why Python does not use brackets {}. I already know this question going to be highly down-voted.

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• How does a linked library combined with the main executable program file interact with a kernel?

  - by I ask Questions For a Reason

  I was attempting to find an answer to this, and I did to some degree, but definitely not anywhere good enough to form a respectable, sensible and clear answer. If I am using Windows, Mac, Linux, or nearly any modern made OS for desktop IBM-compatible PCs, laptops, even tablets and smartphones, there's virtual memory. Clearly, compiling, at least on Windows I know this, an executable object file, such as a simple C "Hello World" output to a terminal, will be linked with the standard library, and several other Window's system software, dynamic linked libraries, and the like. However, how does linking all of these executables together or resources form a connectable interaction with, say, a device driver or any other stuff on the lower level?

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• What about the performance enhancement when using an SSD as the main disk?

  - by motumboe

  I'm planning to buy a new PC and I am thinking about using an SSD as the main disk. I'd also use a standard spinning disk and I'd mount it to /home. To the people already using such a setup: does this induce a practical, noticeable enhancement in performance? I think that access times, rather than transfer rates, are the more useful feature of SSD's. I would like to know if they have a noticeable effect on a desktop installation of Ubuntu. Thanks in advance!

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• How to elegantly work with a lot of print functions?

  - by user1824372

  I'm working on a Python project that is executed on a terminal (or console) for which I am planning to implement a GUI. I did not major in CS so I really have no idea how to effectively design a terminal GUI such that: the user interface looks good in GUI, it is directed to a certain widget, let's say, a text label, or a bottom bar, or a hide-able frame. Do you have any suggestions? Currently, I am using the print function to provide essential information on STDOUT during execution, so a lot of print calls are distributed here and there in the code. I'm thinking of using macro-like variables such as 'FILE_NOT_EXISTS_MESSAGE' for printing, and all of them and their values would be defined in one file. Is that a standard way to do this? Should I introduce a logging system? In summary, I'm looking for a pattern for handling console output that is effective and adaptable.

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• Scaling SQL Server in Azure

  - by simonsabin

  If you’ve been reading the wires about SQL Azure you will have seen a change to the tiers that are being offered. Thsi is all so that you can get a more predictable performance level from the platform and also to enable Azure to manage the resources. You now have 3 categories basic, standard and premium, and within those you have some other levels. This enables you to start your service at a low level and then as required request more capacity (through the portal or API).   For details on the...(read more)

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• Is asking for control totals on a file an outdated means of verifying a file?

  - by CTKeane

  I'm in a new position where I need to process a flat files on a regular basis. The last time I did this was 5 or 6 years ago but as part of the file layout I received control totals. It gave me simplistic information on the file like the total number of records as well as sums of the important fields. This helped me during testing then also during production to verify the file arrived and has correct information. I have asked for similar data for this new project and have hit a wall of no. Is this no longer a standard practice? Is there a better way?

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• Where can I get the 11.04 kernel .config file?

  - by Oli

  I'm using Maverick with the latest available kernels on kernel.org and building them myself. Until now I've been basing my configuration off the stock Maverick kernel and accepting the make oldconfig defaults. I've been doing this for 3 major releases now so I figure I'm starting to slip behind the current "standard". I would like to re-base my kernels off the new Natty .config file. Is this available somewhere online or do I have to download the whole kernel package and extract it? Edit: I've manually pulled in the config from the latest Natty kernel package and I can confirm that I propbably should have done this sooner. A lot of differences between my old "evolved" config and the Natty default. Now if I could just do this without 20 minutes of hunting and downloading the package so I can re-base in the future.

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• As a consultant, how can I amaze my clients?

  - by user20326

  I am about to form a small consulting company and with a few friends and I am curious about how/what you do to amaze and create happy long lasting clients? This is of course besides the standard points like delivering on time, charge fair amount, deliver quality, and deliver what they really want. What other techniques do you use to amaze and create long lasting clients? (and to stand out compare to the competition) For example: Gifts? Happening and events? Night out at the pub?

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• Les premiers smartphones dual-core présentés au CES hier, à quoi servira une telle puissance ?

  Les premiers smartphones dual-core présentés au CES hier, à quoi servira une telle puissance ? Mise à jour du 06.01.2011 par Katleen Début décembre 2010, Nvidia affirmait que "les processeurs dual-core seront le standard en 2011" pour les smartphones et pour les tablettes. Cette prédiction semble être sur le chemin de la réalisation, comme l'ont démontré certains acteurs du secteur hier au CES. En effet, les premiers modèles de téléphones mobiles multi-coeurs y ont été présentés. Motorola a dévoilé son Atrix 4G qu'il vante comme «le smartphone le plus puissant du monde». Dans ses entrailles, on trouve un processeur dual-core Tegra 2 cadencé à 2 Ghz et 1 Go de RAM. De quoi réaliser de ...

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• VS2010 is a game changer with WPF & Silverlight/WP7 Silverlight.

  With the release of Visual Studio 2010 Microsoft makes crystal clear that they are pushing Silverlight to be the platform for developers to use to write it once, run everywhere. What started as a browser plug in, has become the Microsoft standard to provide developers the tools to write and distribute their applications. If you didnt attend the #MIX10 like me, you still can watch all the videos, hoping Microsoft fixed the bandwidth problem, to find for yourself about the common message from Microsoft...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• PHP error log does not display script names nor does it display the errors' line numbers [migrated]

  - by gnxtech3

  I think the title is self-explanatory, and my Google-fu isn't bringing up anything useful. I'm working on a new host, and my php error log only displays the error itself, not which script is the offender, nor which line number the error is occurring on. Makes it a tad difficult to debug, especially since there's only 1 error in the script. More info: I'm not using a custom error handler that I'm aware of. This is a standard Wordpress install. The error was [27-Aug-2012 19:22:36 UTC] PHP NOTICE: Trying to get property of non-object. Just no script name or line number in the error I found that Wordpress' error logging contained the information to debug the problem, but that doesn't explain why the log didn't contain line number or script.

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• Java : fusion approuvée des éditions SE/EE/ME, la gouvernance du langage remaniée, vers plus d'équité ?

  Java : fusion approuvée des comités exécutifs des éditions SE/EE/ME La gouvernance du langage remaniée, vers plus d'équité ? [IMG]http://adiguba.developpez.com/blog/javacup.png[/IMG] Avec quatorze votes favorables et une abstention de Google du comité exécutif (EC) de Java SE/EE, seize Oui et deux abstentions de RIM et AT&T du comité de Java ME, la fusion des comités exécutifs de Java SE (Standard Edition), Java EE (Entreprise Edition) et Java ME (Micro Edition) vient d'être approuvé. Le JCP (Java Community Process) Document passe ainsi à la version 2.9. Le comité exécutif est un groupe de membres qui guide l'évolution de la technologie Java au sein du JCP. Il...

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• appearance incomplete

  - by user288986

  I'm using 14:04 which is pretty nice. Something wionders me: if I open a window (e.g. Ubuntu Software Centre) I can see SOME items (sometimes nothing) but by hovering the mouse over it it appears - and then disappears again. Sometimes the side mover acts the same way... Maybe it has to do with my hardware: P4, 3 GHz, 2 GB RAM, older graphics board, KVM-switch? There's no difference whether I use Gnome, Ubuntu standard, Ubuntu classic, Ubuntu fallback... Thanks for hints Jens

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• Transparent Data Encryption (TDE) in SQL Server

  There are several ways to implement encryption in SQL Server; Arshad Ali focuses on Transparent Data Encryption (TDE), which was introduced in SQL Server 2008 and is available in later releases. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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• Game Object Design

  - by oisin

  I'm having a problem with the way I designed my first simple game in C++. I have GameObject (abstract class) and ObjectA which inherits the update() and draw() methods from GameObject. My main loop contains a linked list of GameObject*, and while that list is not empty it cycles through it, calling update on each one. Up until this point, I thought the design was standard(?) and would work. However, when I call update on ObjectA() I run into two problems: ObjectA can die which messes up the list, which in turn throws off the loop in main. ObjectA can spawn more ObjectA's but these are local scope and the update() goes out of scope, creating problems in main's list of GameObjects. I think my design if alright, but I'm having such problems with segmentation faults that there must be something seriously wrong with at least one part of my implementation. If anyone could point out any serious mistakes or simple examples of this being done (or even alternative designs) then I would greatly appreciate it!

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• Can't Reboot into Windows 8.1 from Ubuntu

  - by Extended Range

  I am newb in Ubuntu. Currently I am using an Acer V11 laptop with a pre-intalled Windows 8.1. I follow some guideline (http://www.everydaylinuxuser.com/2014/05/install-ubuntu-1404-alongside-windows.html) which successfully install Ubuntu 14.04 LTS alongside Windows 8.1 with UEFI enabled all the way throughout the installation and my current usage and a GRUB. But I got into some problem. The dual boot mostly works fine as I am able to successfully boot into either one of the Windows 8.1 or Ubuntu when stating my laptop. However it ran into issue after I start the device and use Ubuntu for a while (2 hour for instance) and then restart it: If I press the restart from Ubuntu, the grub still shows and I am still able to choose the Windows Boot Manager. But the Windows loading process was stuck at the Acer Loading Screen and I am not able to see the standard circular Win8 loading progress bar. Does someone know why would this happens?

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• Why Ubuntu always force itself to be in 1440x900 resolution?

  - by rainlover

  My screen's resolution is 1024x768 and when I installed Ubuntu it was forcefully in 1440x900. I changed it in my account and again I've to change it in another standard account. I don't know any way to change it in login screen. Also when shutting down that black screen with some commands also appears in 1440x900. I don't know why Ubuntu force itself to be in 1440x900. I want 1024x768 in whole way. I don't know whether it is required but I have Intel chipset 128 MB.

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