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• Best way to store motion changes to reduce memory

  - by Andrew Simpson

  I am comparing jpeg to jpeg in a constant 'video-stream'. i am using EMGU/OpenCV to compare each pixels at the byte level. There are 3 channels to each image (RGB). I had heard that it is common practice to store only the pixels that have changed between frames as a way of conserving memory space. But, if for instance/example I say EVERY pixel has changed (pls note i am using an exaggerated example to make my point and i would normally discard such large changes) then the resultant bytes saved is 3 times larger than the original jpeg. How can I store such motion changes efficiently? thanks

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• What use is a Business Logic Layer (BLL)?

  - by Andrew S. Arnold

  In reading up on good practice for database applications I've frequently come across advocates of so-called "business logic layers" and I'm trying to decide if it's best for my project to use one (it's a small personal project). My issue lies in the fact that I can't think of anything for the BLL to do that the DAL can't already handle (executing queries and mapping results to objects), so my BLL just calls the DAL without doing anything itself. Maybe I'm wrong about exactly what the DAL should be doing too. But regardless, what sorts of functionality should be expected of a BLL in a database management application?

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• Converting 3 dimension byte array to a single byte array [on hold]

  - by Andrew Simpson

  I have a 3 dimensional byte array. The 3-d array represents a jpeg image. Each channel/array represents part of the RGB spectrum. I am not interested in retaining black pixels. A black pixel is represented by this atypical arrangement: myarray[0,0,0] =0; myarray[0,0,1] =0; myarray[0,0,2] =0; So, I have flattened this 3d array out to a 1d array by doing this byte[] AFlatArray = new byte[width x height x 3] and then assigning values respective to the coordinate. But like I said I do not want black pixels. So this array has to only contain color pixels with the x,y coordinate. The result I want is to re-represent the image from the i dimension byte array that only contains non-black pixels. How do I do that? It looks like I have to store black pixels as well because of the xy coordinate system. I have tried writing to a binary file but the size of that file is greater than the jpeg file as the jpeg file is compressed. I am using c#.

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• [News] La communaut? ALT.NET est-elle sur le d?clin ?

  La communaut? ALT.NET s'est ?rig? comme symbole d'une bataille contre le d?veloppement ? quick and dirty ? pr?n? ? l??poque par Microsoft (Dataset, applications monolithiques, ?). S?appuyant sur les concepts de l'agilit? (tests unitaires, le mapping O/R, DDD et n-tiers), le mouvement a eu un ?cho important au d?but et semble un peu s'essouffler sur la dur?e. Dans ce billet, Ian Cooper entame une r?flexion de fond sur l'int?r?t et l'utilit? de cette communaut?. D'autant plus que Microsoft a depuis largement fait le m?nage dans sa culture.

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• Windows Phone : Tango augmente le nombre d'applications tournant en multitâche et pourrait être baptisée Refresh

  Windows Phone : Tango augmente le nombre d'applications tournant en multitâche la mise à jour pourrait être baptisée Refresh et dévoilée en Chine ce jour Mise à jour du 21/03/2012 Windows Phone Tango, la prochaine mise à jour mineure du système d'exploitation mobile de Microsoft pourrait avoir pour nom officiel Windows Phone Refresh. Selon des rumeurs, le lancement de Tango pourrait avoir lieu ce jour en Chine. Microsoft aurait envoyé des invitations à la presse chinoise pour un événement le 21 mars. Pour rappel, cette mise à jour équipera principalement les terminaux bas de gamme et permettra à Microso...

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• Apple dévoile l'iPad Mini, que pensez-vous du nouveau concurrent du Nexus 7 et du Kindle Fire ?

  Apple dévoile l'iPad Mini que pensez-vous du nouveau concurrent du Nexus 7 et du Kindle Fire ? Apple domine largement le marché des tablettes et ne veut laisser aucun segment à la concurrence. Avec les tablettes kindle Fire d'Amazon ou encore Nexus 7 de Google, le marché des tablettes s'est fragmenté avec d'un côté les tablettes classiques d'environ 10 pouces et de l'autre côté des tablettes de petites tailles (en moyenne 7 pouces) moins couteuses. Apple a fait son entrée dans cette seconde catégorie en dévoilant officiellement l'iPad Mini lors d'une conférence mardi 23 octobre 2012 à San José, en Californie. [IMG]http://rdonfack.developpe...

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• What is a good C or Obj-C framework for manipulating Git Repositories?

  - by Andrew Theken

  What Obj-C/C libraries have you used for manipulating git repos in your Mac apps? I am working on a Mac app that I would like to be able to clone and modify git repos. Using git directly is not an option as it is GPL and I'd like to sell my app commercially without opening the source. I've seen libgit2, which I could link, but I'm not sure how to do that properly, and it doesn't appear to implement any of the things necessary for pushing/pulling repos over the git protocol.

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• Do PHP-FPM (and other PHP handlers) need execute permissions on the PHP files they're serving?

  - by Andrew Cheong

  I read in a post at Server Fault that PHP-FPM needs execute permissions. However, the answer in When creating a website, what permissions and directory structure? only grants read and write permissions to PHP-FPM. Maybe I don't quite understand how PHP handlers (or CGI in general) work, but the two claims seem contradictory to me. As I understand, when Apache / Nginx gets a request for foobar.php, it "passes" the file to an appropriate handler. That is, I imagine it's as if www-root (or apache or whomever the webserver's running as) were to run some command, /usr/sbin/php-fpm foobar.php Actually, no, that's naive, I just realized. PHP-FPM must be a running instance (if it's to be performant, and cache, etc.), so probably PHP-FPM is just being told, "Hey, quick, process this file for me!" In either case, I don't see why execute permissions are necessary. It's not like the webserver needs to literally execute the file, i.e. ./foobar.php Is the Server Fault answer simply mistaken?

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• Is it possible to make CSS-added text searchable by a browser?

  - by Andrew Stacey

  I run a website that uses CSS pseudo classes to insert text here and there. One of them inserts the value of a CSS counter (whereupon it would require considerable re-engineering of the system to do this without CSS text injection). The specific CSS rule is: .num_defn .theorem_label:after { content: " " counter(definition, decimal); counter-increment: definition; } and this converts "Definition" to "Definition 1" (say). However, the injected text is not searchable by the browser. It doesn't see the 1: if I search for "Definition 1" then it doesn't find it, and if I search for "Definition. Whatever the definition text was" then the browser happily highlights the line except for the inserted 1. So if you imagine the bold text as the highlighting, it would look like: Definition 1 . Whatever the definition text was This is not ideal! People like to refer to definitions by their number and to say "Look at Definition 1 on the page XYZ" (and in contexts where hyperlinks are not available - strange, I know, but it does happen). Thus: Is there any way that I, on the server end, can designate the injected text as "searchable"? If not, is there a simple way at the browser end that this can be enabled?

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• Java : Oracle publie d'urgence des correctifs contre le bogue des nombres à virgule flottante

  Java : Oracle publie d'urgence des correctifs contre le bogue des nombres à virgule flottante Mise à jour du 10/02/11, par Hinault Romaric Oracle vient de publier en urgence des correctifs pour le bogue des nombres à virgule flottante dans Java. Ce bogue entraine le blocage du Runtine Java lorsque celui-ci convertit le nombre 2.2250738585072012e-308 en binaire à virgule flottante. Un bogue qui peut-être exploité à distance sans authentification. L'exploitation de cette faille peut entrainer le blocage ou le crash du Runtine Java et permettre les attaques par Déni de Service. Les applications et s...

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• If you had two projects with the same specification and only one was developed using TDD how could you tell?

  - by Andrew

  I was asked this question in an interview and it has been bugging me ever since. You have two projects, both with the same specification but only one of these projects was developed using Test Driven Development. You are given the source for both but with the tests removed from the TDD project. How can you tell which was developed using TDD? All I was able to muster up was something about the classes being more 'broken up' in to smaller chunks and having more visible APIs, not my proudest moment. I would be very interested to hear a good answer to this question.

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• Track sales and commission with third-party tool

  - by Andrew

  I have a clothing website where I link to various clothing retailers. I have reached an agreement with one of the retailers whereby they will pay a commission to us for every sale they make from traffic that was referred by our site. I need a mechanism for tracking how much commission should be paid to us, that involves as little work as possible to implement from their side. We both have Google Analytics. Option 1: They record a goal in their GA account whenever someone makes a purchase on their site. They see how many completed goals are marked as referral traffic from our site and calculate commission accordingly. The problem with this is that the whole process of calculating and paying commission will be manual. They will need to frequently check how many sales were generated by referral traffic from our site, and probably we will have to chase them for commission payments. Also - since we won't have access to their GA data - we will need to trust that they report all sales accurately. Option 2: Sign them up to an affiliate network like Commission Junction or Google's Affiliate Network, and connect to them through this network. The problem with this solution is that it seems too heavyweight; ideally we don't want to ask a retailer to go through the whole sign up process just to deal with us and pay us commission. I am assuming that there must be some lightweight service that tracks the number of sales by one site and pays commission accordingly to the other site, where the sign up and installation procedure is simple and fast.

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• Glume super amuzante

  - by haioase

  Un ardelean si un lepros stau in inchisoare. La un moment dat, leprosului ii cade o ureche... o ia si o arunca pe geam. Dupa un timp, leprosului ii cade nasul... il ia si il arunca pe geam. Dupa un timp, leprosului ii cade un deget... il ia si il arunca pe geam... Ardeleanul nu mai suporta: -No, dupa cum bag de sama, 'mneata vrei sa evadezi!– Nu va suparati, ce se da aici? - Nu stiu, domnule, stai sa întrebam. Întrebarea circula pâna la primul din rând. - Nu stiu. Mi s-a facut rau si m-am sprijinit de zid. Când mi-am revenit, era deja coada în spatele meu. - De ce nu pleci atunci? - Pai, acum ca sunt primu...

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• La Fondation Apache abandonne le projet Excalibur, faute d'avancées dans son développement

  La Fondation Apache abandonne le projet Excalibur, faute d'avancées dans son développement La Fondation Apache vient d'annoncer l'abandon de son projet open-source Excalibur. La raison invoquée pour mettre fin à l'existence de ce conteneur Java d'Inversion of Control est l'inactivité de son développement. Cet outil léger basé sur Java, qui permettait aux développeurs d'apprendre à un conteneur basé sur un logiciel "d'expliquer" aux composants comment interagir dans une application, comprenait aussi des composants pour s'occuper du cache et du XML. La mailing liste officiel d'Excalibur reste ouverte. Les autres ressources, quant à elles (site Internet, Wikis, téléchargements, bug tracker), ne seront plus dis...

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• Today is my first day in the land of backbone.js

  - by Andrew Siemer - www.andrewsiemer.com

  I am semi-excited to say that today is my first day into the land of backbone.js.  This will of course take me into many other new javascript-y areas.  As I have primarily been focused on building backend systems for the past many years…with no focus on client side bits…this will be all new ground for me.  Very exciting! I am sure that this endeavor will lead to writing about many new findings along the way.  Expect the subject of near future postings to not be related to MVC or server side code. I am starting this journey by reading through the online book “Backbone Fundamentals”.  http://addyosmani.com/blog/backbone-fundamentals/  Has anyone read this yet?  Any feed back on that title. I have read though Derrick Bailey’s thoughts here and here…also very good. Any suggestions on other nuggets of learning backbone?

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• How should I sort images in an isometric game so that they appear in the correct order?

  - by Andrew

  Hi! This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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• Netissime offre 12 mois d'hébergement Web gratuits jusqu'à fin mars, l'hébergeur français fête son onzième anniversaire

  Netissime offre 12 mois d'hébergement Web gratuits Jusqu'à fin mars, l'hébergeur français fête son onzième anniversaire À l'occasion de son onzième anniversaire, l'hébergeur Web français Netissime, réputé pour le sérieux et la fiabilité de ses services, propose des promotions sur toute sa gamme. Ainsi les noms de domaines en .com sont proposés à 2.99 € à l'année, un prix on ne peut plus attractif. Quant à l'hébergement Web mutualisé, Netissime offre une année gratuite sur ses quatre plans Smart, Discount, Professionnel et Sécurisé. Douze mois sont aussi offerts aux entreprises et aux professionnels désireux d'héberger leurs messageries ou leurs s...

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• Are there any specific workflows or design patterns that are commonly used to create large functional programming applications?

  - by Andrew

  I have been exploring Clojure for a while now, although I haven't used it on any nontrivial projects. Basically, I have just been getting comfortable with the syntax and some of the idioms. Coming from an OOP background, with Clojure being the first functional language that I have looked very much into, I'm naturally not as comfortable with the functional way of doing things. That said, are there any specific workflows or design patterns that are common with creating large functional applications? I'd really like to start using functional programming "for real", but I'm afraid that with my current lack of expertise, it would result in an epic fail. The "Gang of Four" is such a standard for OO programmers, but is there anything similar that is more directed at the functional paradigm? Most of the resources that I have found have great programming nuggets, but they don't step back to give a broader, more architectural look.

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• Adeus ano bom – bem vindo, melhor ainda.

  - by anobre

  Olá pessoal! Este ano de 2010 foi realmente muito bom. A NBR cresceu consideravelmente, eu tive algumas mudanças no meu trabalho, me casei, comprei um apartamento e tudo mais. Definitivamente, este ano ficará marcado para sempre. Fiz diversos amigos, dentro da comunidade Microsoft também. O melhor ainda é que as perspectivas para 2011 são ainda mais positivas. E pelo que estou vendo, este sentimento é comum a muitos amigos por aí, o que me deixa mais feliz ainda. Sem mais, desejo a todos um feliz ano de 2011, que muitos objetivos e conquistas sejam alcançados. Indepentende de tecnologias, linguagens ou religiões, que cada um faça o seu melhor, para garantir o melhor a sua volta. Espero que todos sigam duas palavras: MUDANÇAS e EMPREENDEDORISMO. Um forte abraço a todos e até ano que vem!

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• X Error of failed request: BadMatch [migrated]

  - by Andrew Grabko

  I'm trying to execute some "hello world" opengl code: #include <GL/freeglut.h> void displayCall() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_DEPTH_TEST); ... Some more code here glutSwapBuffers(); } int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); glutInitWindowSize(500, 500); glutInitWindowPosition(300, 200); glutInitContextVersion(4, 2); glutInitContextFlags(GLUT_FORWARD_COMPATIBLE); glutCreateWindow("Hello World!"); glutDisplayFunc(displayCall); glutMainLoop(); return 0; } As a result I get: X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 128 (GLX) Minor opcode of failed request: 34 () Serial number of failed request: 39 Current serial number in output stream: 40 Here is the stack trace: fghCreateNewContext() at freeglut_window.c:737 0x7ffff7bbaa81 fgOpenWindow() at freeglut_window.c:878 0x7ffff7bbb2fb fgCreateWindow() at freeglut_structure.c:106 0x7ffff7bb9d86 glutCreateWindow() at freeglut_window.c:1,183 0x7ffff7bbb4f2 main() at AlphaTest.cpp:51 0x4007df Here is the last piece of code, after witch the program crashes: createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress("glXCreateContextAttribsARB" ); if ( createContextAttribs == NULL ) { fgError( "glXCreateContextAttribsARB not found" ); } context = createContextAttribs( dpy, config, share_list, direct, attributes ); "glXCreateContextAttribsARB" address is obtained successfully, but the program crashes on its invocation. If I specify OpenGL version less than 4.2 in "glutInitContextVersion()" program runs without errors. Here is my glxinfo's OpelGL version: OpenGL version string: 4.2.0 NVIDIA 285.05.09 I would be very appreciate any further ideas.

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• Google Top Geek E03

  Google Top Geek E03 In Spanish! Google Top Geek is a weekly show, Mondays at 12 PM (Mexico City time). Google Developers Live and the blog Programa con Google. En este episodio: Elecciones en Estados Unidos (Barack Obama) y el sitio de Política y Elecciones de Google. Women Techmakers en Google Developers Live. Google Public Alerts. Búsquedas de la semana y noticias para desarrolladores: aprende inglés y tecnología Google, Oauth 2.0, HTML5 Rocks y Jam with Chrome. From: GoogleDevelopers Views: 165 1 ratings Time: 15:20 More in Science & Technology

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• Where can I get resources to design a website like this? [closed]

  - by Jhon Andrew

  I have a project. To make a CMS for an online game. Can anyone suggest me where I can get resources that I can use like vintage borders, seamless old papers or any vintage like patterns, etc. I would like to come up with something like this website for example: http://www.gamezaion.com/ I hope someone would suggest and/or give me ideas, inspirations, and examples how I can come up to something like it. P.S.: I am getting a hard time designing, because I define my self as a developer not a designer.. Lol.

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• L'iPad remplacera les PC et sauvera la presse d'après Steve Jobs, qui revient aussi sur le conflit a

  L'iPad remplacera les PC et sauvera la presse d'après Steve Jobs, qui revient aussi sur le conflit avec Flash Mardi soir se tenait à Rancho Palos Verdes (en Californie), le salon All Things Digital. Steve Jobs y était invité et, pendant de longues minutes, il a répondu aux questions de deux journalistes sur une estrade, devant un public captivé. Le patron d'Apple a parlé d'avenir et s'est exprimé sur sa vision du futur de l'informatique. Pour lui, les tablettes devraient prendre le pas sur les ordinateurs portables : «Quand nous étions une nation agraire, toutes les voitures étaient des camions. Mais à partir du moment où la population a commencé à migrer vers les villes, les gens ont commencé à utiliser des voitures. Je pense que...

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• Ubuntu 13.10 upgraded from 13.04 issues

  - by Andrew Sadach

  The keyboard stopped working after a while, I started using 13.04 again VIA USB because I am waiting for the keyboard issues that 13.10 has to get an update. 13.04 had tons of issues I didn't care about because most of it worked. Now almost none of it works. There's even a huge amount of graphical errors. Others have had these issues I've noticed while looking at the similar questions area next to this text box, but my question is can I downgrade 13.10 to 13.04?

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• Le mystère du "Framework Duqu" est résolu, le malware aurait été écrit avec une extension C orientée objet créée sur mesure

  Le mystère du "Framework Duqu" est résolu Le malware aurait été écrit avec une extension C orientée objet créée sur mesure Mise à Jour du 20/03/2012 par MiaowZedong Les chercheurs de Kaspersky ont annoncé hier (19/03/2012) qu'ils avaient résolu « avec un niveau de certitude très élevé » le mystère Duqu. L'expert Igor Soumenkov commence par remercier les nombreux développeurs qui ont suggéré des pistes d'investigation : il annonce avoir reçu plus de 200 commentaires sur son blog et 60+ emails. Il dit donc « un grand merci » à tous ces participants. Parmi les différentes suggestions, le LISP, le Forth, Google Go, l'Erlang, Delphi, les com...

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