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• SOLVED: The type or namespace name 'Linq' does not exist in the namespace 'System' - are you missing

  This problem has been cropping up a lot recently - projects will complain of missing namespace's when I open them up and attempt to compile the first time. If this has happened to you then read on for a simple fix. Scenario I don't know if this one is a bug in Visual Studio 2010 (Beta 2 and RC1) or something else but recently I have noticed this error cropping up more and more. When I open an existing project it might fail to compile. I have also noticed it happen when I have downloaded a fresh...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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• Keypress : une nouvelle bibliothèque JavaScript voit le jour, pour interagir avec les événements du clavier

  Une nouvelle bibliothèque JavaScript voit le jour pour interagir avec les touches du clavier La bibliothèque Keypress permet de capturer les événements clavier et propose plusieurs fonctionnalités avancées associées à ces événements. Elle est simple à utiliser, ne pèse que 9kb et n'a aucune dépendance. Elle peut donc être installée seule sans se soucier d'une éventuelle présence d'une autre bibliothèque (comme beaucoup qui sont basées sur jQuery par exemple). Keypress se veut facile à intégrer et à utiliser, cependant, la bibliothèque est encore soumise aux retours utilisateurs et est donc susceptible d'être modifiée. Si vous recherchez une bibliothèque stable, et que vous n'êtes pas intéressé par...

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• Video: How To Enable JavaScript IntelliSense

  Check out this How-to Enable JavaScript IntelliSense with DevExpress ASP.NET Clientside objects video: The video walks you through few simple steps it takes to get IntelliSense support for the Clientside objects of our ASP.NET controls. If youd like to see a written version, check out this detailed blog post. Watch the how-to video and then drop me a line below with your thoughts on this excellent feature.   Want to experience a better Visual Studio? Install CodeRush by downloading...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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• Unable to connect FileZilla to ubuntu ec2

  - by user1775063

  I have a micro ubuntu instance on ec2. I have done a passwd to set it to simple password. I have installed vsftpd on the ec2 instance. And imported the ec2 pem file via FileZilla-Settings-SFTP, and configured vsftpd.conf with following listen=YES anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd rsa_cert_file=/etc/ssl/private/vsftpd.pem local_root=/home/ubuntu pasv_enable=YES pasv_max_port=12100 pasv_min_port=12000 port_enable=YES I am using username ubuntu, password that_i_set, port 21. I get the following error Error: Critical error Error: Could not connect to server

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• Amazon va lancer un Android Market, de quel oeil Google voit-il arriver ce concurrent sur le marché des applications ?

  Amazon va lancer un Android Market, de quel oeil Google voit-il arriver ce concurrent sur le marché des applications ? Après l'ouverture du Mac App Store ce matin, évoquons également un autre acteur du web qui se lance dans le juteux business des applications en ligne : Amazon. L'entreprise est en train de terminer sa boutique, qui proposera des applications Android dans un but affiché de répondre à la concurrence sur le secteur, tout en prenant appui sur la force du groupe : ses clients, qui sont déjà habitués à faire des achats sur son site principal (rien de plus simple que de rajouter une app dans son caddie d'achats virtuels). "Le grand nombre d'application disponibles aujourd'hui sur le marché n'aide pas l...

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• "Meilleur premier trimestre de tous les temps" pour Intel, AMD dans le vert : retour de la croissan

  Mise à jour du 26/01/10 "Meilleur premier trimestre de tous les temps" pour Intel AMD repasse dans le vert dans un contexte favorable : des résultats qui annoncent le fin de la crise ou simple trompe-l'oeil ? Intel vient d'annoncer un résultat trimestriel record, "le meilleur premier trimestre de tous les temps" (en vo : "best first quarter ever") pour la société. Avec un bénéfice net de 2,4 milliards pour un chiffre d'affaires de plus de 10 milliards, le résultat de ce premier trimestre est en progression de plus de 280 % par rapport à la même période de 2009. Les lancements des modèles Co...

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• External link tracking when opening the link in a new window in Google Analytics?

  - by evanmcd

  OK, so this seems like a really simply problem, but I have yet to find a solution that accomplishes the following: Opens the link in a new window Tracks the event in GA (obviously) Doesn't trigger pop-up blockers (uses target="_blank" instead of window.open) Most of the code I've seen, including Google's, doesn't take into account the case of opening in a new window - they just window location.href. Even GAAddons (http://gaaddons.com/), which charges for commercial use, doesn't seem to work for me. Perhaps, I'm missing something simple - I'd be relieved if so and would thank profusely whoever points it out to me! If no one is able to provide an example, I'll post some of the test cases I've created to illustrate the problem. Thanks.

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• Google Drive : meilleure intégration avec le nouveau Gmail, la taille maximale des pièces jointes passe à 10 Go

  Google Drive : meilleure intégration avec le nouveau Gmail La taille maximale des pièces jointes passe à 10 Go Google vient de mettre à jour son espace de stockage en ligne Google Drive. Le but est de l'intégrer de manière beaucoup plus intime avec Gmail en permettant d'insérer les documents depuis Drive directement dans un e-mail sans quitter le compte de messagerie. La manoeuvre est on ne peut plus simple avec l'arrivée d'une nouvelle icône en bas de la fenêtre « nouveau message » pour insérer les documents hébergés dans le Cloud de Google. [IMG]http://ftp-developpez.com/gordon-fowler/Nveau%20Gmail%20et%20G%20Drive.png[/IMG] Parmi les avan...

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• Qt Quick : des interfaces déclaratives hors norme ? Pourquoi ne sont-elles pas encore répandues ?

  Il y a peu, Nokia lançait Qt Quick, un nouveau module de Qt permettant de décrire des interfaces graphiques, un paradigme alors présenté comme assez nouveau. Or, une simple recherche à l'aide de Google montre bien que ces technologies ne sont pas récentes du tout, on trouve par exemple des traces de K, un langage presque ésotérique tellement il est peu connu du grand nombre actuellement, dans les années 90. Qu'est-ce qui a changé depuis lors ? Aussi, on peut remarquer que d'autres technologies phares dans le développement applicatif telles que .NET ou Java en disposent depuis belle lurette. On peut notamment citer XAML (arrivé avec le .NET Framework 3.0) du côté .NET ou Swul pour Java. Qu'ont-ils donc de différent ? Peut-on les comparer ? Ils tentent tous d'atteindre un cer...

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• Elastic Collision Formula in Java

  - by Shijima

  I'm trying to write a Java formula based on this tutorial: 2-D elastic collisions without Trigonometry. I am in the section "Elastic Collisions in 2 Dimensions". In step 1, it mentions "Next, find the unit vector of n, which we will call un. This is done by dividing by the magnitude of n". My below code represents the normal vector of 2 objects (I'm using a simple array to represent the normal vector), but I am not really sure what the tutorial means by dividing the magnitude of n to get the un. int[] normal = new int[2]; normal[0] = ball2.x - ball1.x; normal[1] = ball2.y - ball1.y; Can anyone please explain what un is, and how I can calculate it with my array in Java?

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• Even distribution through a chain of resources

  - by ClosetGeek

  I'm working on an algorithm which routes tasks through a chain of distributed resources based on a hash (or random number). For example, say you have 10 gateways into a service which distribute tasks to 1000 handlers through 100 queues. 10,000 connected clients are expected to be connected to gateways at any given time (numbers are very general to keep it simple). Thats 10,000 clients 10 gateways (producers) 100 queues 1000 workers/handlers (consumers) The flow of each task is client-gateway-queue-worker Each client will have it's own hash/number which is used to route each task from the client to the same worker each time, with each task going through the same gateway and queue each time. Yet the algorithm handles distribution evenly, meaning each gateway, queue, and worker will have an even workload. My question is what exactly would this be called? Does such a thing already exist? This started off as a DHT, but I realized that DHTs can't do exactly what I need, so I started from scratch.

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• JavaFX in a JSF 2.0 Custom Tag?

  - by Geertjan

  I followed these instructions and now have a simple JSF 2.0 tag handler: The reason I created this is because I'm curious about whether it would be possible to change the tag created above: <my:hello name="Jack" /> ...to something like this: <my:chart type="pie" xAxis="${some-expression}" yAxis="${some-expression}" width="300" height="500" /> Has anyone tried this? That could be a way to incorporate a JavaFX chart into a Java EE application. That's different to how Adam Bien is doing it in LightFish, but might be a simpler and more reusable way of doing the same thing.

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• Les IRC (et chatrooms) de développeurs sont-ils élitistes ? Et le repère du manque de savoir vivre ?

  Les IRC (et chatrooms) de développeurs sont-ils élitistes ? Et le repère du manque de savoir vivre ? L'Internet est un lieu d'échange et parfois aussi, d'entraide. C'est du moins ce que l'on souhaiterait. Tout programmeur, aussi doué soit-il, a déjà connu dans sa vie un "blanc", un moment où il a besoin des conseils d'un spécialiste sur telle ou telle question spécifique. Que faire dans ces cas là ? Le réflexe le plus répandu : aller chercher de l'aide en posant ses questions sur un chat spécialisé, en espérant y trouver une solution. Sur IRC, poser une question "simple" (comprenez : qui peut-être résolue par un manuel) est un motif de châtiment immédiat. Mais, même en respectant c...

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• Where would a senior PHP developer locate the method getActiveEntries()?

  - by darga33

  I have a class named GuestbookEntry that maps to the properties that are in the database table named "guestbook". Very simple! Originally, I had a static method named getActiveEntries() that retrieved an array of all GuestbookEntry objects. Each row in the guestbook table was an object that was added to that array. Then while learning how to properly design PHP classes, I learned some things: Static methods are not desirable. Separation of Concerns Single Responsibility Principle If the GuestbookEntry class should only be responsible for managing single guestbook entries then where should this getActiveEntries() method most properly go? Update: I am looking for an answer that complies with the SOLID acronym principles and allows for test-ability. That's why I want to stay away from static calls/standard functions. DAO, repository, ...? Please explain as though your explanation will be part of "Where to Locate FOR DUMMIES"... :-)

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• Recommendations for taskbar

  - by user210551

  I recently updated to Ubuntu 13.10 and now tint2 stopped working. Better yet: it works, I just can not see it as the all bar is now transparent. Since Tint2 is no longer maintained I doubt it will be updated hence I'm now looking into alternative is there are any. In short: looking for a simple taskbar that sits at the bottom of the screen and that lists applications per window (no groupping!). Don't need fancy animations or widgets/features. Any ideas?

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• (12.04 vm/server) Dist-upgrade to 3.2.0-63 wants to remove git (1.9.2) and git-core - is that the correct behavior?

  - by YellowShark

  was wondering if anyone knows dist-upgrade wants to remove git. FWIW, this is a pretty simple box, mainly used for web dev. $ uname -a Linux precise64 3.2.0-61-generic #93-Ubuntu SMP Fri May 2 21:31:50 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ git --version git version 1.9.2 $ sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages will be REMOVED: git git-core The following NEW packages will be installed: linux-headers-3.2.0-63 linux-headers-3.2.0-63-generic linux-image-3.2.0-63-generic The following packages will be upgraded: git-man linux-headers-server linux-image-server linux-server phpmyadmin 5 upgraded, 3 newly installed, 2 to remove and 0 not upgraded. Need to get 58.8 MB of archives. After this operation, 199 MB of additional disk space will be used. Do you want to continue [Y/n]?

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• Binding to Silverlight ComboBox and Using SelectedValue, SelectedValuePath and DisplayMemberPath

  How do you bind a ComboBox to a collection of objects, and then bind a property from the selected objects to some other scalar property? I received this question today from a friend of mine (a variation of this question). I decided to walk through the scenario here in case anyone else runs into it. This is one of those things that can be confusing it is simple, but it is is much easier shown the explained. This post lays out the scenario and you can download the sample code at the end. When we...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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• Desktop GUI Client - Remote RDBMS communication

  - by magom001

  Sorry if I am asking a trivial question but I have been searching for a while without any luck. I need to design a system and I am looking for advice on the technology that should be used. The layout is very simple: it is a sales application with a centralized database and multiple clients. Each salesperson has GUI app installed on his/her laptop that should be able to connect to the database to retrieve data and upload data (i.e. register new orders). My question is the following: how should the communication between the client and the server be implemented? I doubt that connecting directly to the RDBMS is a good idea... Should I use web-services? XML-RPC? How to implement authentication and encode the data? Thanks for your advice!

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• Whats the right program for me?

  - by andyphillips20

  I would like to learn C++ so I can get a job in the game industry, but there are so many options it a little confusing. I know most of you will say I should read up on C++ before attempting to program it but I learn best by doing things rather then reading. That being said I don't understand some of the thing suggested on other questions, because I've read a few trying to find whats right for me, so putting things in the simplest terms would be helpful. I've been making a couple of games 2d using gamemaker and if theres a C++ equivalent that would be perfect, but if not possible I would like an IDE that allows me to easily continue making 2d games, and is fairly simple to learn. Having a 2d sprite editor would be a nice plus but I can understand if its not every thing I want in one program

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• Targeting a vehicle with complex movement?

  - by e100

  Targeting a vehicle with known constant velocity is simple, and collision is guaranteed. Imprecise AI can be modeled by adding a small error factor. But how would one go about targeting a vehicle whose movements are more complex? Perhaps it's evading the AI or another game object. I've been thinking about how I'd do it myself in a FPS (in which bullets have finite speed) and think there might need to be at least couple of targeting modes based on the target's movement in the previous second or so: If it's near linear (peak acceleration in a certain range) target with the linear model If it's highly irregular (perhaps size of bounding box of recent positions could be used?) , target at an average For now I can assume 2d space, AI is stationary and projectile moves linearly.

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• How to separate and maintain customer specific code

  - by WYSIWYG

  I am implementing customer specific code and currently following simple approach like if (cusomterId == 23) do it. I want to separate out all the customer related code in separate place. But I have following problems. In code is in 1. Stored procs 2. Plain old classes. 3. Controllers 4. Views I came up with two solutions. First is to create table CustomerFunctionlity with columns CustomerId, FunctionalityName, method/Proc, inputs/outputs With this table I can simply check if exists, execute given function. Another way is creating a factory which returns customer related object for an interface. I am writting small end to end customer specific functionalities. How can I write maintenable code. Thanks

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• Looking for open-source solutions for a knowledge sharing website

  - by Bundarr

  There is a need in my workplace to setup a knowledge sharing site, a place where users can discuss projects they are working share documentation ask questions I am looking for a open-source system that answers these needs, and that can be setup in a week, and requires only PHP and MySQL. I am a Wordpress fan and developer and could easily implement such a system in Wordpress, however this system needs to be very simple to use for the technically challenged. Without customization, Wordpress users would still need to login to the "back-end" to post. I like the Stackexchange (OSQA) format, but these do not allow for file uploading out of the box. I do not have experience with Buddy Press, would this be an alternative?

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• How do I find a unit vector of another in Java?

  - by Shijima

  I'm writing a Java formula based on this tutorial: 2-D elastic collisions without Trigonometry. I am in the section "Elastic Collisions in 2 Dimensions". Part of step 1 says: Next, find the unit vector of n, which we will call un. This is done by dividing by the magnitude of n. My below code represents the normal vector of 2 objects (I'm using a simple array to represent the normal vector). int[] normal = new int[2]; normal[0] = ball2.x - ball1.x; normal[1] = ball2.y - ball1.y; I am unsure what the tutorial means by dividing the magnitude of n to get the un. What is un? How can I calculate it with my Java array?

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• SQL SERVER Stored Procedure and Transactions

  I just overheard the following statement – “I do not use Transactions in SQL as I use Stored Procedure“. I just realized that there are so many misconceptions about this subject. Transactions has nothing to do with Stored Procedures. Let me demonstrate that with a simple example. USE tempdb GO --Create3TestTables CREATETABLE TABLE1 (ID INT); [...]...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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• OpenGL Beginner question

  - by nobby

  I'm new to OpenGL programming, but I can't find a good book to read or a tutorial, I've tried reading through the superbible or whatever its name is but it's kind of complicated to me. The tutorial at http://duriansoftware.com/joe/An-intro-to-modern-OpenGL.-Chapter-2.3:-Rendering.html is pretty ok but it doesn't cover what I need mostly, which is opengl math etc (such as projection matrix, view matrix, and so on). I'm fairly OK at C(++) (3+ years experience, I don't know if you would call that "good") What i basically want to do with OpenGL is, make a simple game (prefer 2D as a start and not 3D). Please suggest a good EBook to read and learn from.

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