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• Reasons to Use a VM For Development

  - by George Stocker

  Background: I work at a start-up company, where one team uses Virtual Machines to connect to a remote server to do their development, and another team (the team I'm on) uses local IIS/SQL Server 2005/Visual Studio installations to conduct work. Team VM is located about 1000 miles from Team Non-VM, and the servers the VMs run off of are located near Team VM (Latency, for those that are wondering, is about 50ms). A person high in the company is pushing for Team Non-VM to use virtual machines for programming, development, and testing. The latter point we agree on -- we want Virtual Machines to test configurations and various aspects of the web application in a 'clean' state. The Problem: What we don't agree on is having developers using RDP to connect to a desktop remotely that contains Visual Studio, SQL Server, and IIS to do the same development we could do locally on our laptops. I've tried the VM set-up, and besides the color issue, there is a latency issue that is rather noticeable, not to mention that since we're a start-up, a good number of employees work from home on occasion with our work laptops, and this move would cut off the laptops. They'd be turned in. Reasons to Use Remote VMs for Development (Not Testing!): Here are the stated reasons that this person wants us to use VMs: They work for TeamVM. They keep the source code "safe". If we want to work from home, we could just use our home PCs. Licenses (I don't know what the argument is, only that it's been used). Reasons not to use Remote VMs for Development: Here are the stated reasons why we don't want to use VMs: We like working from home. We get a lot done on our own time. We're not going to use our Home PCs to do work related stuff. The Latency is noticeable. Support for the VMs (if they go down, or if we need a new VM) takes a while. We don't have administrative privileges on the VM, and are unable to change settings as needed. What I'm looking for from the community is this: What reasons would you give for not using VMs for development? Keep in mind these are remote VMs -- this isn't a VM running on a local desktop. It's using the laptop (or a desktop) as a thin client for a remote VM. Also, on the other side of the coin: Is there something we're missing that makes VMs more palatable for development? Edit: I think 'safe' is used in term of corporate espionage, or more correctly if the Laptop gets stolen, the person who stole would have access to our source code. The former (as we've pointed out, is always going to be a possibility -- companies stop that with litigation, there isn't a technical solution (so far as I can see)). The latter point is ( though I don't know its usefulness in a corporate scenario) mitigated by Truecrypt'ing the entire volume.

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• Are closures with side-effects considered "functional style"?

  - by Giorgio

  Many modern programming languages support some concept of closure, i.e. of a piece of code (a block or a function) that Can be treated as a value, and therefore stored in a variable, passed around to different parts of the code, be defined in one part of a program and invoked in a totally different part of the same program. Can capture variables from the context in which it is defined, and access them when it is later invoked (possibly in a totally different context). Here is an example of a closure written in Scala: def filterList(xs: List[Int], lowerBound: Int): List[Int] = xs.filter(x => x >= lowerBound) The function literal x => x >= lowerBound contains the free variable lowerBound, which is closed (bound) by the argument of the function filterList that has the same name. The closure is passed to the library method filter, which can invoke it repeatedly as a normal function. I have been reading a lot of questions and answers on this site and, as far as I understand, the term closure is often automatically associated with functional programming and functional programming style. The definition of function programming on wikipedia reads: In computer science, functional programming is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids state and mutable data. It emphasizes the application of functions, in contrast to the imperative programming style, which emphasizes changes in state. and further on [...] in functional code, the output value of a function depends only on the arguments that are input to the function [...]. Eliminating side effects can make it much easier to understand and predict the behavior of a program, which is one of the key motivations for the development of functional programming. On the other hand, many closure constructs provided by programming languages allow a closure to capture non-local variables and change them when the closure is invoked, thus producing a side effect on the environment in which they were defined. In this case, closures implement the first idea of functional programming (functions are first-class entities that can be moved around like other values) but neglect the second idea (avoiding side-effects). Is this use of closures with side effects considered functional style or are closures considered a more general construct that can be used both for a functional and a non-functional programming style? Is there any literature on this topic? IMPORTANT NOTE I am not questioning the usefulness of side-effects or of having closures with side effects. Also, I am not interested in a discussion about the advantages / disadvantages of closures with or without side effects. I am only interested to know if using such closures is still considered functional style by the proponent of functional programming or if, on the contrary, their use is discouraged when using a functional style.

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• Microsoft Lifecam VX-2000 doesn't work anymore in Cheese

  - by paed808

  I got have two Lifecam VX-2000's and they don't work in cheese anymore. I don't know if it's a problem with a missing package, or a package I installed. Here is the output. (cheese:11122): Clutter-WARNING **: No listener with the specified listener id 29 (cheese:11122): Clutter-WARNING **: No listener with the specified listener id 30 (cheese:11122): Clutter-WARNING **: No listener with the specified listener id 31 (cheese:11122): Clutter-WARNING **: No listener with the specified listener id 32 (cheese:11122): GLib-CRITICAL **: g_hash_table_remove_internal: assertion `hash_table != NULL' failed (cheese:11122): Clutter-WARNING **: Not able to remove listener with id 1 (cheese:11122): GLib-CRITICAL **: g_hash_table_size: assertion `hash_table != NULL' failed totem-video-thumbnailer: 'file:///home/myusername/Videos/Webcam/2012-09-20- 191530.webm' isn't thumbnailable Reason: Media contains no supported video streams. ** (cheese:11122): WARNING **: could not generate thumbnail for /home/myusername/Videos/Webcam/2012-09-20-191530.webm (video/webm) Notice the: Reason: Media contains no supported video streams. When I try to record a video it just makes a 13.2KB WEBM file with nothing. When I take a picture it works. Edit: I've been thinking that the problem started after installing the MediUbuntu repository on my system.

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• IBM enrichit sa solution de Business Intelligence Cognos Express avec Planner un nouvel outil de planification pour les PME

  IBM enrichit sa solution de Business Intelligence Cognos Express Avec Planner un nouvel outil de planification pour les PME IBM vient de lancer « Planner », un nouveau module pour sa solution d'analyse et d'informatique décisionnelle « Cognos Express ». Le module est spécialement conçu pour répondre aux besoins des moyennes entreprises. IBM Cognos Express Planner devrait offrir une démarche structurée de planification, facile à déployer et à utiliser qui permet aux utilisateurs de réagir rapidement aux conditions changeantes du marché. D'après IBM, l'interface utilisateur de Planner, simplifiée, devrait permettre aux financiers et aux non-financiers de collaborer en...

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• Heightmap and Textures

  - by Robert

  Im trying to find the "best way" to apply a texture to a heightmap with opengl 3.x. Its really hard to find something on google because tutorials are olds and they're all using different methods, im really lost and i dont know what to use at all. Here is my code that generates the heightmap (its basic) float[] vertexes = null; float[] textureCoords = null; for(int x = 0; x < this.m_size.width; x++) { for(int y = 0; y < this.m_size.height; y++) { vertexes ~= [x, 1.0f, y]; textureCoords ~= [cast(float)x / 50, cast(float)y / 50]; } } As you can see, i dont know how to apply the texture at all (i was using / 50 for my tests). Result of that code : I would like to have something very basic like : (you can find more pics in his blog) Edit : my texture size is 1024x1024.

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• ASP.NET MVC : optimiser le temps de chargement des pages en utilisant le regroupement et la minification, un article de Hinault Romaric

  Salut, Cette discussion est ouverte pour vous annoncer la publication de mon nouvel article sur l'amelioration du temps de chargement des pages Web en utilisant le regroupement et la minification à la volée du CSS et JavaScript. Citation: Le temps de chargement d'une page est un facteur important dans l'évaluation des performances d'un site Web. Il a un impact non négligeable sur l'expérience utilisateur et même sur le référencement naturel. Plus les pages de votre site se chargent rapidement, plus l'expérience de navigation est flui...

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• Perl like regular expression in Oracle DB

  - by user13136722

  There's regular expression support in Oracle DB Using Regular Expressions in Database Applications Oracle SQL PERL-Influenced Extensions to POSIX Standard But '\b' is not supported which I believe is quite wideliy used in perl and/or other tools perlre - perldoc.perl.org \b Match a word boundary So, I experimented with '\W' which is non-"word" character When combined with beginning-of-line and end-of-line like below, I think it works exactly the same as '\b' SELECT * FROM TAB1 WHERE regexp_like(TEXTCOL1, '(^|\W)a_word($|\W)', 'i')

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• Solaris Is Dead. Long Live Linux

  <b>Linux Magazine:</b> "Hot on the heels of acquiring Sun, Oracle has changed the license for Solaris making it non-free once again. In a time like this, such a move can only be fatal and of course ultimately beneficial to Linux."

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• C++ program...overshoots? [migrated]

  - by Zdrok

  I'm decent at C++, but I may have missed some nuance that applies here. Or maybe I completely missed a giant concept, I have no idea. My program was instantly crashing ("blah.exe is not responding") about 1/5 times it was run (other times it ran completely fine) and I tracked the problem down to a constructor for a world class that was called once in the beginning of the main function. Here is the code (in the constructor) that causes the problem: int ii; for(ii=0;ii<=255;ii++) { cout<<"ent "<<ii<<endl; entity_list[ii]=NULL; } for(ii=0;ii<=255;ii++) { cout<<"sec "<<ii<<endl; sector_list[ii]=NULL; } entity_list[0] = new Entity(0,0); entity_list[0]->_world = this; Specifically the second for loop. The cout references are new for the sake of telling where it is having trouble. It would print the entire "ent 1" to "ent 255" and then "sec 1" to "sec 255" and then crash right after, as if it was going for a 257th run through of the second for loop. I set the second for loop to go until "ii<=254" which stopped all crashes. Does C++ code tend to "overshoot" for loops or something? What is causing it to crash at this specific loop seemingly at random? By the way, entity_list and sector_list point to classes called Entity and Sector, respectively, but they are not constructing anything so I didn't think it would be relevant. I also have a forward declaration for the Entity class in a header for this, but since none were being constructed I didn't think it was relevant either. EDIT: It was due to the new Entity line, I assumed wrongly that the fact that altering the for statement to 254 fixed the crashes meant that it had to be there. I still don't understand why the for loop is related, though.

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• Trainee programs for foreigner in EU [closed]

  - by user63970

  Maybe this is the wrong site for asking that, but I didn't find better. I heard a lot about programs for young IT specialists in EU from other countries, my residence is Ukraine. We have several organizations that provide info about them, but you must pay quite a lot for them to only show you the list of vacancies. Maybe someone knows about companies in EU that are willing to take young programmers for trainee or junior vacancies from non-EU countries? I am interested in C++ development.

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• TPC-H Benchmarks on SQL Server 2014 with Columnstore

  - by jchang

  Three TPC-H benchmark results were published in April of this year at SQL Server 2014 launch, where the new updateable columnstore feature was used. SQL Server 2012 had non-updateable columnstore that required the base table to exist in rowstore form. This was not used in the one published TPC-H benchmark result on SQL Server 2012, which includes two refresh stored procedures, one inserting rows, the second deleting rows. It is possible that the TPC-H rules do not allow a view to union two tables?...(read more)

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• Le saphir pourrait être le nouveau matériau pour fabriquer les écrans de téléphones, Apple, Samsung et LG plancheraient sur le sujet

  Quand Apple veut mettre à la disposition du grand public des écrans de smartphones fabriqués en verre saphir une rumeur dit que Samsung et LG sont intéressés à leur tour par le saphirLes écrans des mobiles se brisent souvent à certains chocs ou par une mauvaise chute. Pour le cas des smartphones depuis l'iPhone V1 en 2007, ces écrans sont faits à base du Gorilla Glass de Corning, une matière qui n'est pas non plus résistante aux chocs. C'est vraiment dommage pour les utilisateurs si l'on se réfère...

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• Tail-recursive implementation of take-while

  - by Giorgio

  I am trying to write a tail-recursive implementation of the function take-while in Scheme (but this exercise can be done in another language as well). My first attempt was (define (take-while p xs) (if (or (null? xs) (not (p (car xs)))) '() (cons (car xs) (take-while p (cdr xs))))) which works correctly but is not tail-recursive. My next attempt was (define (take-while-tr p xs) (let loop ((acc '()) (ys xs)) (if (or (null? ys) (not (p (car ys)))) (reverse acc) (loop (cons (car ys) acc) (cdr ys))))) which is tail recursive but needs a call to reverse as a last step in order to return the result list in the proper order. I cannot come up with a solution that is tail-recursive, does not use reverse, only uses lists as data structure (using a functional data structure like a Haskell's sequence which allows to append elements is not an option), has complexity linear in the size of the prefix, or at least does not have quadratic complexity (thanks to delnan for pointing this out). Is there an alternative solution satisfying all the properties above? My intuition tells me that it is impossible to accumulate the prefix of a list in a tail-recursive fashion while maintaining the original order between the elements (i.e. without the need of using reverse to adjust the result) but I am not able to prove this. Note The solution using reverse satisfies conditions 1, 3, 4.

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• how can i find my usb2rs232 driver

  - by mefmef

  i have a device that is correctly connected to my PC . but i could not see it in /dev . what does it means? is it because of not installing my drive? $ /dev ls before connecting my device: agpgart mei sda1 tty28 tty59 ttyS30 autofs mem sda2 tty29 tty6 ttyS31 block net sda5 tty3 tty60 ttyS4 bsg network_latency sda6 tty30 tty61 ttyS5 btrfs-control network_throughput serial tty31 tty62 ttyS6 bus null sg0 tty32 tty63 ttyS7 char oldmem shm tty33 tty7 ttyS8 console parport0 snapshot tty34 tty8 ttyS9 core port snd tty35 tty9 ttyUSB0 cpu ppp stderr tty36 ttyprintk uinput cpu_dma_latency psaux stdin tty37 ttyS0 urandom disk ptmx stdout tty38 ttyS1 usbmon0 dri pts tty tty39 ttyS10 usbmon1 ecryptfs ram0 tty0 tty4 ttyS11 usbmon2 fb0 ram1 tty1 tty40 ttyS12 vcs fd ram10 tty10 tty41 ttyS13 vcs1 full ram11 tty11 tty42 ttyS14 vcs2 fuse ram12 tty12 tty43 ttyS15 vcs3 hidraw0 ram13 tty13 tty44 ttyS16 vcs4 hpet ram14 tty14 tty45 ttyS17 vcs5 input ram15 tty15 tty46 ttyS18 vcs6 kmsg ram2 tty16 tty47 ttyS19 vcsa log ram3 tty17 tty48 ttyS2 vcsa1 loop0 ram4 tty18 tty49 ttyS20 vcsa2 loop1 ram5 tty19 tty5 ttyS21 vcsa3 loop2 ram6 tty2 tty50 ttyS22 vcsa4 loop3 ram7 tty20 tty51 ttyS23 vcsa5 loop4 ram8 tty21 tty52 ttyS24 vcsa6 loop5 ram9 tty22 tty53 ttyS25 vga_arbiter loop6 random tty23 tty54 ttyS26 zero loop7 rfkill tty24 tty55 ttyS27 lp0 rtc tty25 tty56 ttyS28 mapper rtc0 tty26 tty57 ttyS29 mcelog sda tty27 tty58 ttyS3 $ /dev ls after connecting my device: agpgart mei sda1 tty28 tty59 ttyS30 autofs mem sda2 tty29 tty6 ttyS31 block net sda5 tty3 tty60 ttyS4 bsg network_latency sda6 tty30 tty61 ttyS5 btrfs-control network_throughput serial tty31 tty62 ttyS6 bus null sg0 tty32 tty63 ttyS7 char oldmem shm tty33 tty7 ttyS8 console parport0 snapshot tty34 tty8 ttyS9 core port snd tty35 tty9 ttyUSB0 cpu ppp stderr tty36 ttyprintk ttyUSB1 cpu_dma_latency psaux stdin tty37 ttyS0 uinput disk ptmx stdout tty38 ttyS1 urandom dri pts tty tty39 ttyS10 usbmon0 ecryptfs ram0 tty0 tty4 ttyS11 usbmon1 fb0 ram1 tty1 tty40 ttyS12 usbmon2 fd ram10 tty10 tty41 ttyS13 vcs full ram11 tty11 tty42 ttyS14 vcs1 fuse ram12 tty12 tty43 ttyS15 vcs2 hidraw0 ram13 tty13 tty44 ttyS16 vcs3 hpet ram14 tty14 tty45 ttyS17 vcs4 input ram15 tty15 tty46 ttyS18 vcs5 kmsg ram2 tty16 tty47 ttyS19 vcs6 log ram3 tty17 tty48 ttyS2 vcsa loop0 ram4 tty18 tty49 ttyS20 vcsa1 loop1 ram5 tty19 tty5 ttyS21 vcsa2 loop2 ram6 tty2 tty50 ttyS22 vcsa3 loop3 ram7 tty20 tty51 ttyS23 vcsa4 loop4 ram8 tty21 tty52 ttyS24 vcsa5 loop5 ram9 tty22 tty53 ttyS25 vcsa6 loop6 random tty23 tty54 ttyS26 vga_arbiter loop7 rfkill tty24 tty55 ttyS27 zero lp0 rtc tty25 tty56 ttyS28 mapper rtc0 tty26 tty57 ttyS29 mcelog sda tty27 tty58 ttyS3

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• Is there a driver like this for Windows XP too?

  - by ptikobj

  In Ubuntu, there is a modified non-proprietary Nvidia driver preinstalled. This driver helps me get the full native resolution (1920x1020) of my flatscreen displayed without errors, while my Graphics Card (Geforce FX 5200) only supports DVI-resolutions up to 1440x900. This is a very cool thing. My question is: Is there such a kind of driver also for Windows XP? I've already tried the omega drivers, but 1920x1020 looks awful on Windows.

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• what is optimum length for html title tag in Unicode format?

  - by user1501256

  I have a website that generates its title tag dynamically. the title tag is in unicode format. the title tag is limited to 65 character but sometimes Google doesn't show title tag completely in SERP. I'd like to know what is the optimum length of title tag in terms of seo for unicode titles, and is there any difference between Unicode title and non-Unicode title tag? And what about other search engines Bing, Yahoo and so on.

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• Sécurité : deux millions de mots de passe WordPress réinitialisés suite à la découverte de contributions malicieuses à trois plug-ins populaires

  Sécurité : deux millions de mots de passe WordPress réinitialisés Suite à la découverte de contributions malicieuses à trois plug-ins populaires Automatic vient de lancer une dépêche de sécurité importante sur le blog officiel de WordPress, y notifiant tous les utilisateurs du Blogware/CMS de la découverte de plusieurs contributions malintentionnées au code de trois de ses plug-ins les plus populaires. Des commits acceptés sur le code de AddThis, WPtouch, et W3 Total Cache, se révèlent contenir des portes dérobées soigneusement dissimulées, créées et propagées par un ou plusieurs pirates non encore identifiés. Automatic assure que les contributions malicieuses ne pr...

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• Disable log rotation for apache or move file location

  - by vittocia

  I need to change the log retention for apache, currently is seems to be running on the default from logrotate.conf which is weekly. It creates 'access_log.1' 'access_log.2' and so on for each week. The problem is it deletes the last log file every week, 'access_log.5', I need the logs to keep going infinitely instead of the last log being deleted every week. It seems to be running on the default value from logrotate.conf - I don't want to change the default values held in that file, so I assume there is a way to change the retention using the /etc/logrotate.d/httpd file? the contents are as follows: /var/log/httpd/*log { missingok notifempty sharedscripts postrotate /sbin/service httpd reload > /dev/null 2>/dev/null || true endscript } what can I add/change to stop the last log being deleted every week?

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• How do I give a Byobu session a name?

  - by Ashimema

  Is there a way to create identifiable Byobu sessions so that when I've got multiple sessions running, the byobu-select-session menu gives me a list of sessions I can recognize, as opposed to non-descript tmux port numbers? In an ideal world, it would be great to be able to both start a session giving it a name and to modify such a session to change a name if it's already running? Is this possible, how?

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• How can I select which Java to use?

  - by user6611

  I have installed both OpenJDK 6 and 7. When I run "java somefile" from the command line, OpenJDK 6 is invoked. I do not want to change this default behavior. What command can I use to run my non-default OpenJDK 7 installation instead? (I am used to running "python somefile" to invoke the default Python, "python2.7 somefile" to use Python 2.7 specifically and "python3 somefile" to use Python 3 specifically.)

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• How do functional languages handle a mocking situation when using Interface based design?

  - by Programmin Tool

  Typically in C# I use dependency injection to help with mocking; public void UserService { public UserService(IUserQuery userQuery, IUserCommunicator userCommunicator, IUserValidator userValidator) { UserQuery = userQuery; UserValidator = userValidator; UserCommunicator = userCommunicator; } ... public UserResponseModel UpdateAUserName(int userId, string userName) { var result = UserValidator.ValidateUserName(userName) if(result.Success) { var user = UserQuery.GetUserById(userId); if(user == null) { throw new ArgumentException(); user.UserName = userName; UserCommunicator.UpdateUser(user); } } ... } ... } public class WhenGettingAUser { public void AndTheUserDoesNotExistThrowAnException() { var userQuery = Substitute.For<IUserQuery>(); userQuery.GetUserById(Arg.Any<int>).Returns(null); var userService = new UserService(userQuery); AssertionExtensions.ShouldThrow<ArgumentException>(() => userService.GetUserById(-121)); } } Now in something like F#: if I don't go down the hybrid path, how would I test workflow situations like above that normally would touch the persistence layer without using Interfaces/Mocks? I realize that every step above would be tested on its own and would be kept as atomic as possible. Problem is that at some point they all have to be called in line, and I'll want to make sure everything is called correctly.

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• JEE project(s) to show prospective employers

  - by My code has no bugs

  I'm studying JEE and want to get employed doing JEE work in the near future. From reading this website and various others, I now know that many employers value a github profile with code samples, projects and the like. Since I want to get hired doing JEE stuff, what kind of projects can I work on to eventually place on github showing prospective employers? Is there any (non-nonsense) project(s) which uses the JEE stack I can work on ?

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• Download Singularity Source Code

  - by Editor

  The Singularity Research Development Kit (RDK) is based on the Microsoft Research Singularity project. It includes source code, build tools, test suites, design notes, and other background materials. The Singularity RDK is for academic non-commercial use and is governed by this license. Singularity is a research project focused on the construction of dependable [...]

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• The Linux desktop is already here

  <b>Cyber Cynic:</b> "I found it more than a little sad that someone in 2010 could still think that Linux is "still a non-starter on the desktop." Please &#8212; wake up: We're all Linux desktop users now."

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• Cloud : lancement officiel de la fondation OpenStack, indépendante de Rackspace et forte de 5600 membres issus de 850 organisations

  Lancement officiel de la fondation OpenStack Forte de 5600 membres issus de 850 organisations, elle est désormais indépendante de Rackspace OpenStack se détache de la tutelle de Rackspace, l'important fournisseur américain d'infrastructures IaaS (Infrastructure as-a-service), instigateur du projet en collaboration avec la NASA. Grâce aux efforts des membres du projet OpenStack depuis octobre 2011, l'OpenStack Foundation existe désormais officiellement en tant qu'organisme autonome à but non lucratif. [IMG]http://idelways.developpez.com/news/images/openstack-logo.gif[/IMG] La fondation aura ...

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