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• What's New in Visual Studio 2010 Languages

  - by Aamir Hasan

  What's New in Visual Basic 2010Describes new features in the Visual Basic language and Code Editor. The features include implicit line continuation, auto-implemented properties, collection initializers, and more.What's New in Visual C# 2010Describes new features in the C# language and Code Editor. The features include the dynamic type, named and optional arguments, enhanced Office programmability, and variance.What's New in Visual C++ 2010Describes new and revised features in Visual C++. The features include lambda expressions, the rvalue reference declarator, and the auto, decltype, and static_assert keywords.What's New in Visual F# 2010Describes the F# language, which is a language that supports functional programming for the .NET Framework.Reference:http://msdn.microsoft.com/en-us/library/bb386063%28VS.100%29.aspx

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• Can coding style cause or influence memory fragmentation?

  - by Robert Dailey

  As the title states, I'd like to know if coding style can cause or influence memory fragmentation in a native application, specifically one written using C++. If it does, I'd like to know how. An example of what I mean by coding style is using std::string to represent strings (even static strings) and perform operations on them instead of using the C Library (such as strcmp, strlen, and so on) which can work both on dynamic strings and static strings (the latter point is beneficial since it does not require an additional allocation to access string functions, which is not the case with std::string). A "forward-looking" attitude I have with C++ is to not use the CRT, since to do so would, in a way, be a step backwards. However, such a style results in more dynamic allocations, and especially for a long living application like a server, this causes some speculation that memory fragmentation might become a problem.

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• Converting mp4 to mp3

  - by aki

  I have a video I need to convert to mp3 (from the command line - not GUI) video.mp4 I tried: ffmpeg -i -b 192 video.mp4 video.mp3 with no success. I get the following error: WARNING: library configuration mismatch Seems stream 0 codec frame rate differs from container frame rate: 59.83 (29917/500) -> 59.75 (239/4) WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s Encoder (codec id 86017) not found for output stream #0.0 so I tried lame: lame -h -b 192 video.mp4 video.mp3 I get: Warning: unsupported audio format Am I missing something?

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• Can I use GPL software in a commercial application

  - by Petah

  I have 3 questions about the GPL here: If I use GPL software in my application, but don't modify or distribute it, do I have to release my application under the GPL? What if I modify some software that my application uses. Then do I have to release my application under the GPL, or can I just supply the modified software under the GPLs terms. And what if I use GPL software, but don't modify it, can I distribute it with my application? My case in point is, I have a PHP framework which I use the GeSHi library to highlight some output. Because GeSHi is GPL, does my framework have to be GPL? Can I modify GeSHi for particular use cases of my application if I supply the modifications back to the GeSHi maintainers? Can I redistribute my framework with GeSHi?

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• Automated tests for differencing algorithm

  - by Matthew Rodatus

  We are designing a differencing algorithm (based on Longest Common Subsequence) that compares a source text and a modified copy to extract the new content (i.e. content that is only in the modified copy). I'm currently compiling a library of test case data. We need to be able to run automated tests that verify the test cases, but we don't want to verify strict accuracy. Given the heuristic nature of our algorithm, we need our test pass/failures to be fuzzy. We want to specify a threshold of overlap between the desired result and the actual result (i.e. the content that is extracted). I have a few sketches in my mind as to how to solve this, but has anyone done this before? Does anyone have guidance or ideas about how to do this effectively?

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• File system layout for multiple build targets

  - by Yttrill

  I am seeking some ideas for how to build and install software with some parameters. These including target OS, target platform CPU details, debugging variant, etc. Some parts of the install are shared, such as documentation and many platform independent files, others are not, such as 64 and 32 bit libraries when these are separated and not together in a multi-arch library. On big networked platforms one often has multiple computers sharing some large server space, so there is actually cause to have even Windows and Unix binaries on the same disk. My product has already fixed an install philosophy of $INSTALL_ROOT/genericname/version/ so that multiple versions can coexist. The question is: how to manage the layout of all the other stuff?

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• Fastest way to set up a JSON server on my local machine [closed]

  - by Mohsen

  I am a front-end developer. For many experiements I do I need to have a server that talks JSON with my client side app. Normally that server is a simple server that response to my POSTs and GETs. For example I need to setup a server that saves, modifies and read data from a "library" database like this: POST /books create a book GET /book/:id gets a book and so on... What is the fastest to set up and easiest technology stack for database and server in this case? I am open to use Ruby, Nodejs and anything that do the job fast and easy. Is there any framework (on any language) that do stuff like this for me?

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• Algorithm to simplify building/structural meshes

  - by morpheus

  I am looking for an algorithm to simplify the meshes of buildings or similar structures. EDIT: I had made a comment that Hoppe's algorithm tends to make meshes more and more spherical with simplification. But, I am not sure about it, so am deleting the comment. Buildings in contrast should tend to become more and more rectangular with increasing simplification. The D3DX extensions for D3D in version 9.0 (d3dx9.lib) used to have classes to do progressive mesh simplification. See: http://doc.51windows.net/Directx9_SDK/?url=/directx9_sdk/graphics/reference/d3dx/functions/mesh/d3dxgeneratepmesh.htm http://msdn.microsoft.com/en-us/library/windows/desktop/bb281243(v=vs.85).aspx

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• Are there any alternative JS ports of Box2D?

  - by Petteri Hietavirta

  I have been thinking about creating a top down 2D car game for HTML5. For my first game I wrote the physics and collisions my self but for this one I would like to use some ready made library. I found out Box2D and its JS port. http://box2d-js.sourceforge.net It seems to be quite old port, made in 2008. Is it lacking many features of current Box2D or does it have major issues with it? And are there any alternatives for it?

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• Unable to install Ekundli-2002 with wine1.6

  - by Pandya

  I am running Ubuntu 14.04 and installed wine1.6 (stable). I am trying to install Ekun2002.exe (Astrology software) by wine. But at the end of installation, it is getting following error: Foreign application won't perform DDE method or operation How to solve this ? Further Information: I searched following info from: http://msdn.microsoft.com/en-us/library/aa266013%28v=vs.60%29.aspx An application refused to perform the DDE method or operation you attempted. This error has the following causes and solutions: You supplied data or commands that the other application did not recognize.Check the application's documentation to see what data or commands it recognizes. The LinkItem property isn't set to an item that the other application recognizes as valid for the topic of the conversation. Check the application's documentation to see what items it recognizes.

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• Building vs buying a server for an academic lab [closed]

  - by Roy

  I'm looking for advice on the classic build vs buy question. We need a new linux server to run Matlab computation on in our lab (academic). Matlab parallel computing toolbox licence allows up to 12 local workers so we are aiming at a 12 core server with 4GB memory per core (total of 48gb). The system will have an SSD for the OS and a raid-5 (4x2tb) for data. I looked around and found a (relatively) cheap vendor, Silicon Mechanics, that offers a system to our liking (specs below) for $6732. However, buying the components from newegg cost only $4464! The difference is $2268 which is 50% of the base cost. If buying from a company can be thought of as a sort of insurance, basically my premiums are of 50% of the base cost which to me sounds like a lot. Of course any downtime is bad, but the work is not "mission critical", i.e. if it takes a few days to fix it when it breaks its no the end of the world. If it takes weeks to months then its a problem. If it breaks 2-3 times in 3 years, not too bad. If it breaks every month not good. In term of build experience, I set up a linux cluster in grad school (from existing computers) and I build my home pcs but I never built a server before. The server components I'm thinking about: 1 x SUPERMICRO SYS-7046T-6F 4U Tower Server Barebone Dual LGA 1366 Intel 5520 DDR3 1333/1066/800 ($1,050) 12 x Kingston 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) ECC Unbuffered Server Memory ($420) 2 x Intel Xeon E5645 Westmere-EP 2.4GHz LGA 1366 80W Six-Core ($1,116) 4 x Seagate Constellation ES 2TB 7200 RPM SATA 6.0Gb/s 3.5" ($1,040) 1 x SAMSUNG Internal DVD Writer Black SATA ($20) 1 x Intel 520 Series 2.5" 180GB SATA III MLC SSD $300 1 x LSI LSI00281 PCI-Express 2.0 x8 MD2 Low profile SATA / SAS MegaRAID SAS 9260CV-4i Controller Card, $695

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• Naming conventions for newtype deconstructors (destructors?)

  - by Petr Pudlák

  Looking into Haskell's standard library we can see: newtype StateT s m a = StateT { runStateT :: s -> m (a, s) } newtype WrappedMonad m a = WrapMonad { unwrapMonad :: m a } newtype Sum a = Sum { getSum :: a } Apparently, there (at least) 3 different prefixes used to unwrap a value inside a newtype: un-, run- and get-. (Moreover run- and get- capitalizes the next letter while un- doesn't.) This seems confusing. Are there any reasons for that, or is that just a historical thing? If I design my own newtype, what prefix should I use and why?

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• How to design console application with good seperation of UI from Logic

  - by JavaSa

  Is it considered an overkill for console application to be design like MVC , MVP or N tier architecture? If not which is more common and if you can link me to simple example of it. I want to implement a tic tac toe game in console application. I have a solution which hold two projects: TicTacToeBusinessLogic (Class library project) and TicTacToeConsoleApplication (Console application project) to represent the view logic. In the TicTacToeConsoleApplication I've Program.cs class which holds the main entry point (public static void Main). Now I face a problem. I want the game to handle its own game flow so I can: Create new GameManager class (from BL) but this causing the view to directly know the BL part. So I'm a little confused how to write it in an acceptable way. Should I use delegates? Please show me a simple example.

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• SSD as primary or secondary drive on a small Linux server?

  - by Alex Martelli

  I'm pensioning off my 10-years-old home server and replacing it with an Ubuntu 10.04 box. The two storage devices are a Western Digital Caviar Green 2.0TB HD and an Intel X25-M 34nm Gen 2 80GB SATA II 2.5inch SSD (the box has 8GB RAM and an i5 750, if it matters). I don't care much about boot times (since I don't plan to reboot all that often;-); the main frequent, performance-demanding task will be (re)building large open source C or C++ software packages from sources (as an open source contributor, I do that often). So, I thought I'd keep the SSD as the secondary drive and the HD as the primary one, using the SSD mostly for the files that can otherwise demand a lot of seeking (esp. in a parallel make). However, the friendly vendor (perhaps more experienced in Windows systems than in Linux ones) thinks the "normal" way to configure the machine would be with the SSD as the primary drive. I'm pretty rusty on configuring and tuning systems, so, I thought I'd better double check on SuperUser... thanks in advance for advice about this choice!

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• How do I render terrain in a 2.5D perspective, like in the game Don't Starve?

  - by Hamdan

  I have experience in making 2D side scroller games such as Terraria, but now I want to challenge myself and make a game that has a 2.5D perspective. The game I am trying to mimic is Don't Starve. Right now my focus is on figuring out how to render the ground. I am having a hard time figuring out how they generated the ground, and then rendered it. The way I think they rendered the ground is by first painting the ground in some paint program, and then somehow manipulating that flat image so that it appears to have depth. I am completely confused by how you would actually render that type of terrain. I want the terrain to have the following features: Look like the terrain in Don't Starve, here is a video showing the terrain in Don't Starve The terrain will be flat, and the camera's angle and perspective will be fixed Any tips and hints will be appreciated, Thank you in advance. (I am working in Java, using the Light Weight Java Game Library (LWJGL).)

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• Corsair Hydro i series cpu cooler fan control

  - by user214690

  Im relatively new at Ubuntu and have found an answer to basically every single issue ive ever had thru this site... Otherthan this. I have been toying with the idea of a Corsair h80i for my dual boot system (win7/U12.10) and mostly use it in ubuntu. I have done some research on the interweb regarding fan control in linux and nearly ran up short untill I came across this thread: http://ubuntuforums.org/archive/index.php/t-2096166.html And it seems to have worked around it. (altho I have not tested it for myself) Is there any program/library/source that can be used to control the fans without having to MacGuyver it??

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• What's throttling the database?

  - by Troels Arvin

  Hardware: Intel x86_64 with 192GB of RAM. OS: CentOS 5.4 x86_64. DBMS: DB2 v. 9.7.1 64 bit. During certain special workloads (e.g. parallel REORGs/RUNSTATs), I've seen the server transporting 450MB/s with 25000IO/s (yes, there is probably some storage system caching happening here) while all CPU cores were happily working in an even mix of usermode/wait. And disk benchmark tools can also bring some very satisfying bandwith and IO/s numbers to the table. On the other hand, we also have another scenario: A single rather complex query with at least one large table scan. db2's "list applications" reports that the query is Executing (not locked). IO: At most 10MB/s, 500 IO/s; CPU: two cores in 99.9% wait state, all other cores 100% idle. The tables which the query reads from have been altered to have LOCKSIZE=TABLE, so I would think that lock list work is zero. What's going on in such a situation? What tools/snapshots/... can I use to gain better insight in such a case?

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• Internal HDs that don't contain the OS aren't accessable unless I try to manually browse them

  - by Hrafn

  So I have 4 internal hard drives, one that contains the OS (Ubuntu 12.04), all ext4. After starting the computer up, and without having tried to access the drives (File manager, terminal etc) it seems like the drives haven't been mounted. If I go into the "Disks" utility I see that the disks haven't been mounted. Programs that try to access the HD's during startup throw an error. For example my music player can't find the library, my note taking software can't find the database etc. But after opening the drive in a file manager everything works. I've checked SMART on all the disks and everything is a ok. Any and all ideas would be appreciated.

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• What is the most complicated data structure you have used in a practical situation?

  - by Fanatic23

  The germ for this question came up from a discussion I was having with couple of fellow developers from the industry. Turns out that in a lot of places project managers are wary about complex data structures, and generally insist on whatever exists out-of-the-box from standard library/packages. The general idea seems to be like use a combination of whats already available unless performance is seriously impeded. This helps keeping the code base simple, which to the non-diplomatic would mean "we have high attrition, and newer ones we hire may not be that good". So no bloom filter or skip-lists or splay trees for you CS junkies. So here's the question (again): Whats the most complicated data structure you did or used in office? Helps get a sense of how good/sophisticated real world software are.

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• Trying to run 32bit windows game in wine on 64bit 12.04

  - by georgelappies

  I am trying to run Icewind dale2 from GOG.com in wine on ubuntu 12.04 64bit. I am using the AMD ATI binary blob display driver. Running the file command on /usr/lib32/fglrx/libGL.so.1.2 gives: george@devbox:/usr/lib32/fglrx$ file libGL.so.1.2 libGL.so.1.2: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, stripped george@devbox:/usr/lib32/fglrx$ So I definetly have 32bit opengl. I am using latest Playonlinux and tried this on wine 1.4 and 1.5... How can I force wine to use my opengl library?

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• Python simulation-scripts architecture

  - by Beastcraft

  Situation: I've some scripts that simulate user-activity on desktop. Therefore I've defined a few cases (workflows) and implemented them in Python. I've also written some classes for interacting with the users' software (e.g. web browser etc.). Problem: I'm a total beginner in software design / architecture (coding isn't a problem). How could I structure what I described above? Providing a library which contains all the workflows as functions, or a separate class/module etc. for each workflow? I want to keep the the workflows simple. The complexity should be hidden in the classes for interacting with the users' software. Are there any papers / books I could read about this, or could you provide some tips? Kind regards, B

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• How can I instruct nautilus to pre-generate thumbnails?

  - by Glutanimate

  I have a large library of PDF documents (papers, lectures, handouts) that I want to be able to quickly navigate through. For that I need thumbnails. At the same time however, I see that the ~/.thumbnails folder is piling up with thumbs I don't really need. Deleting thumbnail junk without removing the important thumbs is impossible. If I were to delete them, I'd have to go to each and every folder with important PDF documents and let the thumbnail cache regenerate. I would love to able to automate this process. Is there any way I can tell nautilus to pre-cache the thumbs for a set of given directories? Note: I did find a set of bash scripts that appear to do this for pictures and videos, but not for any other documents. Maybe someone more experienced with scripting might be able to adjust these for PDF documents or at least point me in the right direction on what I'd have to modify for this to work with PDF documents as well.

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• PeopleTools Collateral Available

  - by Matthew Haavisto

  We've posted a lot of documentation including presentations, white/red papers, data sheets, and other useful collateral on Oracle.com, a public site.  If you are seeking detailed information on a particular topic, this is a good place to start.  It's a bit hard to find so I'm posting it here. This resource library contains collateral on general PeopleTools, user experience and interaction--including the PeopleSoft Interaction Hub, platforms, security, life-cycle management, reporting and analytics, integration, and accessibility.  There are also links to video feature overviews, viewlets, and appcasts, and the latest release information. There is much valuable information here, so if you need information about PeopleTools and related information, start here.

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• Free E-Book - Testing for Continuous Delivery with Visual Studio 2012

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/11/05/free-e-book---testing-for-continuous-delivery-with-visual-studio.aspx At http://msdn.microsoft.com/en-us/library/jj159345.aspx, Microsoft Press are offering the free e-Book, Testing for Continuous Delivery with Visual Studio 2012. "As more software projects adopt a continuous delivery cycle, testing threatens to be the bottleneck in the process. Agile development frequently revisits each part of the source code, but every change requires a re-test of the product. While the skills of the manual tester are vital, purely manual testing can't keep up. Visual Studio 2012 provides many features that remove roadblocks in the testing and debugging process and also help speed up and automate re-testing. " (Please ignore the click to look inside!)

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• Can't see YouTube videos in either Firefox or Chromium

  - by williepabon

  Dont' know why or if it is related, after upgrading Ubuntu 10.04 kernel ( I guess from 2.6.32-38 to -42) I can's see youtube videos. I checked the flash plug-ins installed and I have: (1) flashplugin-installer, (2) flashplugin-nonfree and (3) flashplugin-nonfree-extrasound. I haven't reinstalled the browsers yet. Here's the code of the plugins installed: williepabon@raquel-desktop:~$ sudo lsb_release -a; uname -a; dpkg -l | egrep 'flash|gnash|swf|spark' [sudo] password for williepabon: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.04.4 LTS Release: 10.04 Codename: lucid Linux raquel-desktop 2.6.32-42-generic #95-Ubuntu SMP Wed Jul 25 15:57:54 UTC 2012 i686 GNU/Linux ii flashplugin-installer 11.2.202.238ubuntu0.10.04.1 Adobe Flash Player plugin installer ii flashplugin-nonfree 11.2.202.238ubuntu0.10.04.1 Adobe Flash Player plugin installer (transit ii flashplugin-nonfree-extrasound 0.0.svn2431-3 Adobe Flash Player platform support library Any ideas to solve this issue? Thanks.

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