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• USB device changes using udev and D-Bus

  - by kicsyromy

  I am trying to get a list of currently plugged in USB devices in Ubuntu 10.10 and monitor changes that happen, like devices being plugged in or out using udev and D-Bus. I'm fairly new to programming using D-Bus. I saw one example: "Linux: How to detect is usb keyboard is plugged and unplugged". Problem is that it uses HAL and I know that HAL is deprecated. I found some working code, but it's working only with storage devices such as USB sticks, media players or CD-ROM drives. I want the whole thing: mice, keyboards, USB cameras, chargers; anything that is plugged in to the USB. How can I listen D-Bus events for any USB device plug and unplug? This is basically what I have now (also): import dbus import gobject from dbus.mainloop.glib import DBusGMainLoop def device_added_callback(device): print 'Device %s was added' % (device) def device_changed_callback(device): print 'Device %s was changed' % (device) #must be done before connecting to DBus DBusGMainLoop(set_as_default=True) bus = dbus.SystemBus() proxy = bus.get_object("org.freedesktop.UDisks", "/org/freedesktop/UDisks") iface = dbus.Interface(proxy, "org.freedesktop.UDisks.Device") devices = iface.get_dbus_method('EnumerateDevices')() print '%s' % (devices) #addes two signal listeners iface.connect_to_signal('DeviceAdded', device_added_callback) iface.connect_to_signal('DeviceChanged', device_changed_callback) #start the main loop mainloop = gobject.MainLoop() mainloop.run()

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• Floating point undesireable in highly critical code?

  - by Kirt Undercoffer

  Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed". This is in the context of computing acceleration for an emergency braking system for a high speed train. This thinking seems to be invoking possible errors in small differences between measurements of a moving object but small differences at slow speeds aren't a problem (or shouldn't be), small differences between two measurements at high speed are irrelevant - can there be a problem with small roundoff errors during deceleration for an emergency braking system? This problem has been observed with airplane braking systems resulting in hydroplaning but could this actually happen in the context of a high speed train? The concern about fp errors seems to not be well-founded in this context. Any insight? The fp is used for acceleration so perhaps the concern is inching over a speed limit? But fp should be just fine if they use a double in whatever implementation language. The actual problem in the text states: During the inspection of the code for the emergency braking system of a new high speed train (a highly critical, real-time application), the review team identifies several characteristics of the code. Which of these characteristics are generally viewed as undesirable? The code contains three recursive functions (well that one is obvious). The computation of acceleration uses floating point arithmetic. All other computations use integer arithmetic. The code contains one linked list that uses dynamic memory allocation (second obvious problem). All inputs are checked to determine that they are within expected bounds before they are used.

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• SRV from UAV on the same texture in directx

  - by notabene

  I'm programming gpgpu raymarching (volumetric raytracing) in directx11. I succesfully perform compute shader and save raymarched volume data to texture. Then i want to use same texture as SRV in normal graphic pipeline. But it doesnt work, texture is not visible. Texture is ok, when i save it file it is what i expect. Texture rendering is ok too, when i render another SRV, it is ok. So problem is only in UAV-SRV. I also triple checked if pointers are ok. Please help, i'm getting mad about this. Here is some code: //before dispatch D3D11_TEXTURE2D_DESC textureDesc; ZeroMemory( &textureDesc, sizeof( textureDesc ) ); textureDesc.Width = xr; textureDesc.Height = yr; textureDesc.MipLevels = 1; textureDesc.ArraySize = 1; textureDesc.SampleDesc.Count = 1; textureDesc.SampleDesc.Quality = 0; textureDesc.Usage = D3D11_USAGE_DEFAULT; textureDesc.BindFlags = D3D11_BIND_UNORDERED_ACCESS | D3D11_BIND_SHADER_RESOURCE ; textureDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT; D3D->CreateTexture2D( &textureDesc, NULL, &pTexture ); D3D11_UNORDERED_ACCESS_VIEW_DESC viewDescUAV; ZeroMemory( &viewDescUAV, sizeof( viewDescUAV ) ); viewDescUAV.Format = DXGI_FORMAT_R32G32B32A32_FLOAT; viewDescUAV.ViewDimension = D3D11_UAV_DIMENSION_TEXTURE2D; viewDescUAV.Texture2D.MipSlice = 0; D3DD->CreateUnorderedAccessView( pTexture, &viewDescUAV, &pTextureUAV ); //the getSRV function after dispatch. D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc ; ZeroMemory( &srvDesc, sizeof( srvDesc ) ); srvDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT; srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D; srvDesc.Texture2D.MipLevels = 1; D3DD->CreateShaderResourceView( pTexture, &srvDesc, &pTextureSRV);

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• Writing a DB Python or Ruby

  - by WojonsTech

  I am planning on writing a database. I know it's crazy and people will tell me there is no good reason to do so. I am really using it to get better at programming overall, this database wont be used in production. I am planning on writing it Ruby or Python. I have some experience with both languages, but no job or large project experience. I don't want this to be a this is better than that randomly I really need some facts. The things that I need to know are which of the language are better at the following things. Searching arrays/hashes? Sorting? Threading? Sockets? Memory management? Disk Reads/Writes? base64 encode/decode? Again this is just a project for myself. I will port it on github for the hell of it, but I don't expect it to be amazing or going up against mysql or mongodb any day.

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• The MsC gray zone: How to deal with the "too unexperienced on engineering/too under-qualified for research" situation?

  - by Hunter2

  Last year I've got a MsC degree on CS. On the beginning of the MsC course, I was keen on moving on with research and go for a PhD. However, as the months passed, I started to feel the urge to write software that people would, well, actually use. The programming bug had bitten me, again. So, I decided that before deciding on getting a PhD degree, I would spend some time on the "real world", working as a software developer. Sadly, most companies here in Brazil are "services" companies that seem to be stuck on the 80s when it comes to software development. I have to fend off pushy managers, less-than-competent coworkers and outrageous software requirements (why does everyone seem to need a 50k Oracle license and a behemoth Websphere AS for their CRUD applications?) on a daily basis, and even though I still love software development, the situation is starting to touch a nerve. And, mind you, I'm already lucky for getting a job at a place that isn't a plain software sweatshop. Sure, there are better places around here or I could always try my luck abroad, but then I hit the proverbial brick wall: Sorry, you're too unexperienced as a developer and too under-qualified as a researcher I've already heard this, and variations of that, multiple times. Research position recruiters look for die-hard, publication-ridden, rockstar PhDs, while development position recruiters look for die-hard, experience-ridden, rockstar programmers. To most, my MsC degree seems like a minor bump on my CV (and an outright waste of time for some). Applying for abroad positions is even harder, since the employer would have to deal of the hassle of a VISA process, which I understand that, sometimes, is too much. Now I'm feeling I've reached a dead-end. I'm certain that development (and not research) is my thing, so should I just dismiss my MsC (or play it as a "trump card") and play the "big fish on a small pond" role while I gather some experience and contribute on some open-source projects as a plus? Is there a better way to handle this?

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• My Windows 8 App in Windows Store

  - by Stephen.Walther

  Finally, you have a good reason to upgrade to Windows 8! My Brain Eaters app was just accepted into the Windows Store. Just in time for Halloween! The Brain Eaters app is a sample app from my soon to be released book Windows 8 Apps with HTML5 and JavaScript. The game illustrates several important programming concepts which you need when building Windows 8 games with JavaScript such as using HTML5 Canvas and the new requestAnimationFrame() method. If you are looking for Halo or Call of Duty then you will be disappointed. If you are looking for PAC-MAN then you will be disappointed. I created the simplest arcade game that I could imagine so I could explain it in the book. All of the code for the game is included with the book. The goal of the game is to eat the food pellets while avoiding the zombies while running around a maze. Every time you get eaten by a zombie, you can hear my six year old son saying “Oh No!”. Here’s the link to the game: http://apps.microsoft.com/webpdp/app/brain-eaters/e283c8d0-1fed-4b26-a8bf-464584c9de6d

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• Suggestions to start a cross-platform project

  - by Gabriele

  I have a big project in my head, it should be cross-platform (Win, Max and Linux), online (Client - Server) and with 3D graphics. I would like some suggestions to start with the right things. Currently I'm a PHP/MySQL coder, I used to code in C and Pascal on DOS ages (Borland Times ;)), my C knowlegde need a refresh but it's ok. I guess C++ it's the right language. What platform and what i should use to code? I can choose from all three platforms. My idea was to use Visual Studio 2010 C++, but i'm not sure if it support Native code. What kind of libraries should i use? I guessed OpenSSL for the login, OpenGL for graphics part. For the Audio or the GUI? Any other suggestions are well accepted. I know it's a "BIG DEAL" but I have no rush and it'll be a free-time project, only for my pleasure. Thank you in advance.

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• How to really master ASP.NET MVC?

  - by user1620696

  Some years ago I've worked with web development just using PHP without focus on object orientation and so on. When I knew a little bit about it, and the benefits it brings, I've started moving to ASP.NET MVC. First, I've studied C# in the book Visual C# Step by Step. I've found it a good book for a beginner, and I could learn a lot of this new language with it. Now, when I've came to study ASP.NET MVC, I hadn't so much luck. I've studied on some books that explained MVC well and so on, but then started just saying: "do that, and now that, and then that", and I feel I couldn't really master ASP.NET MVC. I feel this, because when I was reading, I knew how to do the things the book taught, like implementing DI with Ninject and so on, but some time later, without looking at it for some time, I couldn't do it by myself. What I'm trying to say, is that usually I don't know where to start, how to do things in this framework and so on. How can I really master ASP.NET MVC? There is some book, some tutorial series, anything, that can really help with that? I'm pretty happy with the .NET framework, my problem isn't it, my only problem is working with the MVC framework, and applying the techniques from object orientation there. I don't know if this question is on-topic here, but I'm really just looking for some good references, to become better with this framework.

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• Should You Delete Windows 7 Service Pack Backup Files to Save Space?

  - by The Geek

  After you install the Windows 7 Service Pack 1 that we mentioned yesterday, you might be wondering how to reclaim some of the lost drive space—which we’ll show you how today—but should you actually do it? Note: If you haven’t installed the new SP1 release yet, be sure to read our post explaining what it entails before you do. Spoiler: it’s mostly bugfixes. Latest Features How-To Geek ETC Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) Read On Phone Pushes Data from Your Desktop to the Appropriate Android App MetroTwit is a Sleek Native Twitter Client for Your Windows System Make Efficient Use of Tab Bar Space by Customizing Tab Width in Firefox See the Geeky Work Done Behind the Scenes to Add Sounds to Movies [Video] Use a Crayon to Enhance Engraved Lettering on Electronics Adult Swim Brings Their Programming Lineup to iOS Devices

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• CodePlex Daily Summary for Sunday, October 20, 2013

  CodePlex Daily Summary for Sunday, October 20, 2013Popular ReleasesKerbalAlarmClock: v2.6.1.0 Release: Version 2.6.1.0 Recompiled it for 0.21 Added Crew Alarms (track Kerbal rather than Vessel) Added Distance Target Alarms - distance from target vessel or altitude above planet Added Launch Rendezvous Alarm (under Ascending/Descending Node for Landed craft) - MechJeb2 code - thanks r4m0n Allow restoration of Nodes that you have passed (useful for interplanetary burns) Added missing Dres Transfer Model data - thanks Voneiden Added view only version of Alarm clock to both Space Center...MSBuild Extension Pack: October 2013: Release Blog Post The MSBuild Extension Pack October 2013 release provides a collection of over 480 MSBuild tasks. A high level summary of what the tasks currently cover includes the following: System Items: Active Directory, Certificates, COM+, Console, Date and Time, Drives, Environment Variables, Event Logs, Files and Folders, FTP, GAC, Network, Performance Counters, Registry, Services, Sound Code: Assemblies, AsyncExec, CAB Files, Code Signing, DynamicExecute, File Detokenisation, GUI...VG-Ripper & PG-Ripper: VG-Ripper 2.9.49: changes NEW: Added Support for "ImageTeam.org links NEW: Added Support for "ImgNext.com" links NEW: Added Support for "HostUrImage.com" links NEW: Added Support for "3XVintage.com" linksMedia Companion: Media Companion MC3.583b: As before release but fixed for no movie poster sourcesNew* Both - Added 'An' as option to ignore in title * Movie - Renaming - added %Z - Sorttitle to Legend * Movie - Renaming - added %O - Audio Channels to Legend * Movie - Remove a poster source from priority list. Reset List back to defaults. * Made Media Companion truly portable application. Fixed* Movie - browse for Poster Or Fanart, allows for jpg, tbn, png and bmp images * Movie - Alt Fanart Browser - Url or Browse window now fully...MoreTerra (Terraria World Viewer): MoreTerra 1.11.3.1: Release 1.11.3.1 ================ = New Features = ================ Added markers for Copper Cache, Silver Cache and the Enchanted Sword. ============= = Bug Fixes = ============= Use Official Colors now no longer tries to change the Draw Wires option instead. World reading was breaking for people with a stock 1.2 Terraria version. Changed world name reading so it does not crash the program if you load MoreTerra while Terraria is saving the world. =================== = Feature Removal = =...patterns & practices - Windows Azure Guidance: Cloud Design Patterns: 1st drop of Cloud Design Patterns project. It contains 14 patterns with 6 related guidance.Player Framework by Microsoft: Player Framework for Windows and WP (v1.3): Includes all changes in v1.3 beta 1 and v1.3 beta 2 Support for Windows 8.1 RTM and VS2013 RTM Xaml: New property: AutoLoadPluginTypes to help control which stock plugins are loaded by default (requires AutoLoadPlugins = true). Support for SystemMediaTransportControls on Windows 8.1 JS: Support for visual markers in the timeline. JS: Support for markers collection and markerreached event. JS: New ChaptersPlugin to automatically populate timeline with chapter tracks. JS: Audio an...Json.NET: Json.NET 5.0 Release 8: Fix - Fixed not writing string quotes when QuoteName is falsePowerShell Community Extensions: 3.1 Production: PowerShell Community Extensions 3.1 Release NotesOct 17, 2013 This version of PSCX supports Windows PowerShell 3.0 and 4.0 See the ReleaseNotes.txt download above for more information.SQL Power Doc: Version 1.0.2.1: Misc. bug fixes Added logic to resolve members of a Windows Group server login Added columns to Excel workbooks to show definitions for server permissions, server roles, database permissions, and database rolesSocial Network Importer for NodeXL: SocialNetImporter(v.1.9): This new version includes: - Download latest status update and use it as vertex tooltip - Limit the timelines to parse to me, my friends or both - Fixed some reported bugs about the fan page and group importer - Fixed the login bug reported latelyTerrariViewer: TerrariViewer v7.1 [Terraria Inventory Editor]: You can now backspace in number fields Items added in 1.2.0.3 no longer corrupt player files Buff durations capped at 9999999 Item stacks capped at 9999999 Version info added Prefix IDs corrected Shoe and Eye color box are now properly clickable Moved Bank and Safe into their own tab Users will now be notified of new updatesPython Tools for Visual Studio: 2.0: PTVS 2.0 We’re pleased to announce the release of Python Tools for Visual Studio 2.0 RTM. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python language. PTVS supports a broad range of features including CPython/IronPython, Edit/Intellisense/Debug/Profile, Cloud, IPython, and cross platform and cross language debugging support. QUICK VIDEO OVERVIEW For a quick overview of the general IDE experience, please watch this v...CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.8.2: Solved scrolling problem after DocumentFormatting Implemented "format as you type" --- To avoid the DLLs getting locked by OS use MSI file for the installation.LINQ to Twitter: LINQ to Twitter v2.1.09: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.Sandcastle Help File Builder: SHFB v1.9.8.0 with Visual Studio Package: General InformationIMPORTANT: On some systems, the content of the ZIP file is blocked and the installer may fail to run. Before extracting it, right click on the ZIP file, select Properties, and click on the Unblock button if it is present in the lower right corner of the General tab in the properties dialog. This new release contains bug fixes and feature enhancements. There are some potential breaking changes in this release as some features of the Help File Builder have been moved into...C++ REST SDK (codename "Casablanca"): C++ REST SDK 1.3.0: This release fixes multiple customer reported issues as well as the following: Full support for Dev12 binaries and project files Full support for Windows XP New sample highlighting the Client and Server APIs : BlackJack Expose underlying native handle to set custom options on http_client Improvements to Listener Library Note: Dev10 binaries have been dropped as of this release, however the Dev10 project files are still available in the Source CodeAD ACL Scanner: 1.3.2: Minor bug fixed: Powershell 4.0 will report: Select—Object: Parameter cannot be processed because the parameter name p is ambiguous.Fast YouTube Downloader: YouTube Downloader 2.2.0: YouTube Downloader 2.2.0VidCoder: 1.5.8 Beta: Added hardware acceleration options: Bicubic OpenCL scaling algorithm, QSV decoding/encoding and DXVA decoding. Updated HandBrake core to SVN 5834. Updated VidCoder setup icon. Fixed crash when choosing the mp4v2 container on x86 and opening on x64. Warning: the hardware acceleration features require specific hardware or file types to work correctly: QSV: Need an Intel processor that supports Quick Sync Video encoding, with a monitor hooked up to the Intel HD Graphics output and the lat...New ProjectsAdd2Nums: Add2Nums is a VB.NET project that takes 2 numbers, computes their sum and outputs the result. Developed by Justin Mifsud as part of Assignment 1 (7COM0152)Athir: GPAO El_AthirCS-MIC - C# Math Input Control: CS-MIC is a .NET library written in C# designed to give developers easy access to expression parsing.HLS Video Player: An open source over-the-network video player for HLS (Hinkle Light Show)Project Stark: This is a secret project available only to the project owners for the time being.Run ++: Run Plus Plus is a tool that enables you to custom the commands in the "Run" dialog.SimpleAddition: This is a simple ASP.NET in VB.NET page that allows users to enter 2 numbers, and display their sum. SWE 681 Go Fish: Project

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• Pause and Resume and get the value of a countdown timer by savedInstanceState [closed]

  - by Catherine grace Balauro

  I have developed a countdown timer and I am not sure how to pause and resume the timer as the TextView for the timer is being clicked. Click to start then click again to pause and to resume, click again the timer's text view. This is my code: Timer = (TextView)this.findViewById(R.id.time); //TIMER Timer.setOnClickListener(TimerClickListener); counter = new MyCount(600000, 1000); }//end of create private OnClickListener TimerClickListener = new OnClickListener() { public void onClick(View v) { updateTimeTask(); } private void updateTimeTask() { if (decision==0){ counter.start(); decision=1;} else if(decision==2){ counter.onResume1(); decision=1; } else{ counter.onPause1(); decision=2; }//end if }; }; class MyCount extends CountDownTimer { public MyCount(long millisInFuture, long countDownInterval) { super(millisInFuture, countDownInterval); }//MyCount public void onResume1(){ onResume(); } public void onPause1() { onPause();} public void onFinish() { Timer.setText("00:00"); p1++; if (p1<=4){ TextView PScore = (TextView) findViewById(R.id.pscore); PScore.setText(p1 + ""); }//end if }//finish public void onTick(long millisUntilFinished) { Integer milisec = new Integer(new Double(millisUntilFinished).intValue()); Integer cd_secs = milisec / 1000; Integer minutes = (cd_secs % 3600) / 60; Integer seconds = (cd_secs % 3600) % 60; Timer.setText(String.format("%02d", minutes) + ":" + String.format("%02d", seconds)); //long timeLeft = millisUntilFinished / 1000; }//on tick }//class MyCount protected void onResume() { super.onResume(); //handler.removeCallbacks(updateTimeTask); //handler.postDelayed(updateTimeTask, 1000); }//onResume @Override protected void onPause() { super.onPause(); //do stuff }//onPause I am only beginner in android programming and I don't know how to get the value of the countdown timer using savedInstanceState. How do I do this?

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• Hosting several HTTP servers on single domain name

  - by Nakilon

  Several people have got a single domain name server.company.com server, where they are now supposed to host their infrastructure or temporal projects, written in different ways even in different programming languages. How do they divide the domain? Split into subdomains: john.server.company.com, kate.server.company.com, etc. This would need a lot of admins' assistance, time, etc. -- there would be no way for John and Kate to do it themselves. Split into url namespaces: server.company.com/john/, server.company.com/kate/, etc. Pro: They now can make a single welcome page at root with any additional info (if they need?) Con: Each server would need to know their namespace string constant, and hrefs like / whould need patching. Split into ports: server.company.com:8080, server.company.com:8081, etc. and make a single :80 welcome page. Pro: They still can make a single welcome page at :80 Con: ??? I would like to know more pros and cons for 2 and 3 solution.

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• Why do programmers write closed source applications and then make them free? [closed]

  - by Ken

  As an entrepreneur/programmer who makes a good living from writing and selling software, I'm dumbfounded as to why developers write applications and then put them up on the Internet for free. You've found yourself in one of the most lucrative fields in the world. A business with 99% profit margin, where you have no physical product but can name your price; a business where you can ship a buggy product and the customer will still buy it. Occasionally some of our software will get a free competitor, and I think, this guy is crazy. He could be making a good living off of this but instead chose to make it free. Do you not like giant piles of money? Are you not confident that people would pay for it? Are you afraid of having to support it? It's bad for the business of programming because now customers expect to be able to find a free solution to every problem. (I see tweets like "is there any good FREE software for XYZ? or do I need to pay $20 for that".) It's also bad for customers because the free solutions eventually break (because of a new OS or what have you) and since it's free, the developer has no reason to fix it. Customers end up with free but stale software that no longer works and never gets updated. Customer cries. Developer still working day job cries in their cubicle. What gives? PS: I'm not looking to start an open-source/software should be free kind of debate. I'm talking about when developers make a closed source application and make it free.

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• Why doesn't Firefox cache my images and CSS

  - by Richard A

  I am using IIS7, I have already set up the following. But when I run Firefox it seems not to cache any of my images even with "remember history" set. <?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <staticContent> <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="7.00:00:00" /> </staticContent> </system.webServer> </configuration> However when I use Firebug it still points to Firefox not caching images and CSS: public,max-age=604800 Content-Type text/css Content-Encoding gzip Last-Modified Mon, 27 Jun 2011 03:53:22 GMT Accept-Ranges bytes Etag "507968c27d34cc1:0" Vary Accept-Encoding Server Microsoft-IIS/7.5 X-Powered-By ASP.NET Date Mon, 27 Jun 2011 13:06:41 GMT Content-Length 5067 Request Headersview source Host www.xx.com User-Agent Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 Accept text/css,*/*;q=0.1 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip, deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Referer http://www.xx.com/ Cookie __utma=62996397.135679654.1309106351.1309159743.1309164158.8; __utmz=62996397.1309106351.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __utmc=62996397

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• Which opcodes are faster at the CPU level?

  - by Geotarget

  In every programming language there are sets of opcodes that are recommended over others. I've tried to list them here, in order of speed. Bitwise Integer Addition / Subtraction Integer Multiplication / Division Comparison Control flow Float Addition / Subtraction Float Multiplication / Division Where you need high-performance code, C++ can be hand optimized in assembly, to use SIMD instructions or more efficient control flow, data types, etc. So I'm trying to understand if the data type (int32 / float32 / float64) or the operation used (*, +, &) affects performance at the CPU level. Is a single multiply slower on the CPU than an addition? In MCU theory you learn that speed of opcodes is determined by the number of CPU cycles it takes to execute. So does it mean that multiply takes 4 cycles and add takes 2? Exactly what are the speed characteristics of the basic math and control flow opcodes? If two opcodes take the same number of cycles to execute, then both can be used interchangeably without any performance gain / loss? Any other technical details you can share regarding x86 CPU performance is appreciated

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• How to get Visual Studio 2010 Express Edition on Windows 7

  - by thanigai

  Visual studio 2010 is an amzing release from Microsoft. I have tried the beta 1,2 of Visual Studio 2010 and finally the full version is released. I am also interested in the latest edition of Windows which nothing but our Windows 7. Next to Vista I like this version very much. Out of curiosity I have installed the prebuild version of Windows 7. I tried installing the express edition here and it failed making me disappointed. I tried two or three times and finally I decided to download the trial version of Windows 7. After that I can install the Visual Studio 2010 express edition easily. I have given the link below from where I have downloaded the file. http://www.microsoft.com/express/downloads/ Here the link give is through Web PI Installer. Other option is you can download the ISO image file and burn them to a disc or use a virtual disc This Visual Web developer will provide the Sql Server engine alone. To get a Sql Server Management Studio get from the following link http://www.microsoft.com/express/Database/InstallOptions.aspx That's it all the things necessary for the web application programming is ready. Ah I forget to tell about the Silverlight. Please find the Silverlight 4 latest tools from the below link (WCF RIA services is the main update) http://www.silverlight.net/getstarted/ Silverlight 4 Tools(http://www.microsoft.com/downloads/details.aspx?FamilyID=eff8a0da-0a4d-48e8-8366-6ddf2ecad801&displaylang=en) Expression Blend 4 trial(http://www.microsoft.com/downloads/details.aspx?FamilyID=88484825-1b3c-4e8c-8b14-b05d025e1541&displaylang=en) I think the reader would have enjoyed on how to get these things. Please let me know if you are not clear with any of these things.  Thanks, Thani

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• CodePlex Daily Summary for Sunday, November 10, 2013

  CodePlex Daily Summary for Sunday, November 10, 2013Popular ReleasesWindow Embedded Compact (CE) Component Wizard: Version 4.0 Improved Compact13Minshell Support: This version will work with Platform Builder for Compact 2013 in Visual Studio 2012 (Update 2) as well as CE 6 (VS2005) and Compact 7 (VS2008) Select files for direct inclusion in the OS when built. Select where shortcuts are placed in the OS FileSystem for them During the build of the subproject, the selected files are copied to FlatRelease directory, along with the BIB file etc, for inclusion in the OS build. A .inf file is also generated along with the subproject for .cab file gener...Media Companion: Media Companion MC3.587b: Fixed* TV - Locked shows display correctly after refresh * TV - missing episodes display in correct colour for missed or to be aired * TV - Rescrape of Multi-episodes working. * TV - Cache fix where was writing episodes multiple times * TV - Fixed Cache writing missing episodes when Display missing eps was disabled. Revision HistoryGenerate report of user mailbox size for Exchange 2010: Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Generate-report-of-user-e4e9afcaCheck SQL Server a specified database index fragmentation percentage (SQL): Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Check-SQL-Server-a-a5758043Save attachments from multiple selected items in Outlook (VBA): Script Download: Script Download: http://gallery.technet.microsoft.com/scriptcenter/Save-attachments-from-5b6bf54bRemove Windows Store apps in Windows 8: Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Remove-Windows-Store-Apps-a00ef4a4PCSX-Reloaded: 1.9.94: General changes:Support for compressed audio in cue files. ECM support. OS X changes:32-bit support has been dropped Partial French and Hungarian translationsDynamics AX 2012 R2 Kitting: AX 2012 R2 CU7 release of Kitting: Here is the AX 2012 R2 CU7 release of kitting. Released both as a XPO and a model.PantheR's GraphX for .NET: GraphX for .NET RELEASE v1.0.1: PLEASE RATE THIS RELEASE IF YOU LIKED IT! THANKS! :) RELEASE 1.0.1 + Changed ExportToImage() parameters: added useZoomControlSurface param that enables zoom control parent visual space to be used for export instead whole GraphArea panel. Using this technique it is possible to export graphs with negative vertices coordinates. + Added common interface IZoomControl for all included Zoom controls + Added new method GraphArea.GenerateGraph() that accepts only optional parameters and will use in...VidCoder: 1.5.12 Beta: Added an option to preserve Created and Last Modified times when converting files. In Options -> Advanced. Added an option to mark an automatically selected subtitle track as "Default". Updated HandBrake core to SVN 5878. Fixed auto passthrough not applying just after switching to it. Fixed bug where preset/profile/tune could disappear when reverting a preset.Toolbox for Dynamics CRM 2011/2013: XrmToolBox (v1.2013.9.25): XrmToolbox improvement Correct changing connection from the status dropdown Tools improvement Updated tool Audit Center (v1.2013.9.10) -> Publish entities Iconator (v1.2013.9.27) -> Optimized asynchronous loading of images and entities MetadataDocumentGenerator (v1.2013.11.6) -> Correct system entities reading with incorrect attribute type Script Manager (v1.2013.9.27) -> Retrieve only custom events SiteMapEditor (v1.2013.11.7) -> Reset of CRM 2013 SiteMap ViewLayoutReplicator (v1.201...Microsoft SQL Server Product Samples: Database: SQL Server 2014 CTP2 In-Memory OLTP Sample, based: This sample showcases the new In-Memory OLTP feature, which is part of SQL Server 2014 CTP2. It shows the new memory-optimized tables and natively-compiled stored procedures, and can be used to show the performance benefit of in-memory OLTP. Installation instructions for the sample are included in the file ‘awinmemsample.doc’, which is part of the download. You can ask a question about this sample at the SQL Server Samples Forum Composite C1 CMS - Open Source on .NET: Composite C1 4.1: Composite C1 4.1 (4.1.5058.34326) Write a review for this release - help us improve, recommend us. Getting started If you are new to Composite C1 and want to install it: http://docs.composite.net/Getting-started What's new in Composite C1 4.1 The following are highlights of major changes since Composite C1 4.0: General user features: Drag-and-drop images and files like PDF and Word directly from own your desktop and folders into page content Allow you to install Composite Form Builder ...CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.9.0: Implemented Recent Scripts list Added checking for plugin updates from AboutBox Multiple formatting improvements/fixes Implemented selection of the CLR version when preparing distribution package Added project panel button for showing plugin shortcuts list Added 'What's New?' panel Fixed auto-formatting scrolling artifact Implemented navigation to "logical" file (vs. auto-generated) file from output panel To avoid the DLLs getting locked by OS use MSI file for the installation.Social Network Importer for NodeXL: SocialNetImporter(v.1.9.1): This new version includes: - Include me option is back - Fixed the login bug reported latelyVeraCrypt: VeraCrypt version 1.0c: Changes between 1.0b and 1.0c (11 November 2013) : Set correctly the minimum required version in volumes header (this value must always follow the program version after any major changes). This also solves also the hidden volume issueCaptcha MVC: Captcha MVC 2.5: v 2.5: Added support for MVC 5. The DefaultCaptchaManager is no longer throws an error if the captcha values was entered incorrectly. Minor changes. v 2.4.1: Fixed issues with deleting incorrect values of the captcha token in the SessionStorageProvider. This could lead to a situation when the captcha was not working with the SessionStorageProvider. Minor changes. v 2.4: Changed the IIntelligencePolicy interface, added ICaptchaManager as parameter for all methods. Improved font size ...Duplica: duplica 0.2.498: this is first stable releaseDNN Blog: 06.00.01: 06.00.01 ReleaseThis is the first bugfix release of the new v6 blog module. These are the changes: Added some robustness in v5-v6 scripts to cater for some rare upgrade scenarios Changed the name of the module definition to avoid clash with Evoq Social Addition of sitemap providerVG-Ripper & PG-Ripper: VG-Ripper 2.9.50: changes NEW: Added Support for "ImageHostHQ.com" links NEW: Added Support for "ImgMoney.net" links NEW: Added Support for "ImgSavy.com" links NEW: Added Support for "PixTreat.com" links Bug fixesNew Projects3389????? Wpf: 3389?????BitwiseEncoding: Bitwise encodeing with a key and XOR function.C++ language Tests: Just some tests on C++ language features.Check SQL Server a specified database index fragmentation percentage (SQL): This T-SQL sample script illustrates how to check index fragmentation of a specified database in SQL Server. Generate report of user mailbox size for Exchange 2010: This script could be used to export mailboxes’ information to a CSV file, including SamAccountName, DisplayName, TotalItemSize. IUAIMS: AI managment system MineCraftMODDevelopSupportKit: MineCraftMOD?????????? MineCraftMOD development integrated assistance systemRecording Audio in the Browser and Uploading it with ASP.NET MVC: This project is described on blog.falafel.comRemove Windows Store apps in Windows 8: This script can be used to remove multiple Windows Store apps from a user account in Windows 8. It provides a list of installed Windows Store apps. You can speSave attachments from multiple selected items in Outlook (VBA): This VBA sample illustrates how to save attachments from multiple selected items in Outlook.SMW: El presente proyecto es una aplicación orientada al manejo de información de la empresa Jamecl que se encarga del alquiler de camionetasSS-eye-S: An easy to use simplified API surrounding the SSIS components to allow the creation of SSIS packages within code.STAR FOX XNA: Remake of a classic videogame. In this case, that videogame will be Star Fox (1993) for SNES game console. wooyang: ???

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• Japanese Multiplication simulation - is a program actually capable of improving calculation speed?

  - by jt0dd

  On SuperUser, I asked a (possibly silly) question about processors using mathematical shortcuts and would like to have a look at the possibility at the software application of that concept. I'd like to write a simulation of Japanese Multiplication to get benchmarks on large calculations utilizing the shortcut vs traditional CPU multiplication. I'm curious as to whether it makes sense to try this. My Question: I'd like to know whether or not a software math shortcut, as described above is actually a shortcut at all. This is a question of programming concept. By utilizing the simulation of Japanese Multiplication, is a program actually capable of improving calculation speed? Or am I doomed from the start? The answer to this question isn't required to determine whether or not the experiment will succeed, but rather whether or not it's logically possible for such a thing to occur in any program, using this concept as an example. My theory is that since addition is computed faster than multiplication, a simulation of Japanese multiplication may actually allow a program to multiply (large) numbers faster than the CPU arithmetic unit can. I think this would be a very interesting finding, if it proves to be true. If, in the multiplication of numbers of any immense size, the shortcut were to calculate the result via less instructions (or faster) than traditional ALU multiplication, I would consider the experiment a success.

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• How do I get others to see past my prior inexperience?

  - by Kevin

  My core question is how do I proceed from the following predicament. I will be honest with you, I wasted my College Experience. I slacked off and didn't take any of my comp sci classes that seriously, somehow i still got out with a 3.25 GPA. But truth be told I learned nothing. I befriended most of my professors who went pretty lenient on me in terms of grading. However, I basically came out of College knowing how to program a simple calculator in VB.Net. I was (to my great surprise) hired by a very large respected company in Denver as a Junior developer. Well the long and the short of it is that I knew so little about programming that I quickly became the office pariah and was almost fired due to my incompetence. It has been 8 months now and I feel I have learned some basic things and I am not as picked on as I used to be by the other developers. However, everyone hates me and the first few months have given the other developers a horrible perception of me. I am no longer afraid of code or learning, but I have put my self in the precarious position of being the scapegoat of our department. I hate going to work every day because no one there is my friend and pretty much everyone is hostile to me. What should I do? Any advice?

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• CMS for coding blog

  - by OrgnlDave

  I've got a server with a LAMP stack and such. I'd like to host a blog-type site (or if there's a free place good for this, that would be cool!) that covers a variety of tutorials, interesting content, etc. There are tons of CMS's out there but if you search for tips on ones that do programming type things well, you get tons of hits about web development. I'd like to know if anyone here has recommendations from actually using a CMS for this type of thing or, short of that, can recommend one - not based on generalities like "Joomla! is great!" I'm looking for the least setup time possible. I'm proficient with CSS and I can design a color scheme, so that's not a big problem. As you can expect, attaching files, pictures, and syntax highlighting are musts (C/C++ ish is good). Ability to group posts, perhaps use tags, etc. would be cool too, but not necessary. As I'm writing this, it almost sounds like it'd be easier to custom-code a small PHP site myself.

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• December 2012 OTN Member Offers

  - by Cassandra Clark - OTN

  Our partners have answered the special offer call just in time for you to either shop for the tech professional in your life or share the list below with someone who keeps asking you what you want for the holidays.  Go right to the Oracle Technology Network Member Discount Page or read on for more details. Oracle  Store has extended their 10% Savings through December 31st 2012.Oracle Press - Oracle Technology Network members get 40% off the latest Oracle Press book by Oracle ACE Directors Ben Prusinski and Gustavo Gonzalez, Oracle E-Business Suite Financials Handbook, Third Edition in print and ebook format. CRC Press - Has added 3 NEW titles!  Get 20% off the below title at checkout. Secure Java: For Web Application Development Open Source Data Warehousing and Business Intelligence Developing Essbase Applications: Advanced Techniques for Finance and IT Professional Oracle Embedded Programming and Application Development Packt Publishing - Get 25% off the print books and get 35% off the eBooks listed below. You will need to be logged in for the discounts to apply at checkout and codes expire December 31st 2012. Getting Started with Oracle Data Integrator 11g: A Hands-On Tutorial Oracle Business Intelligence Enterprise Edition 11g: A Hands-On Tutorial Oracle Certified Associate, Java SE 7 Programmer Study Guide Safari Online-  Give the Gift of Knowledge This Holiday SeasonGive your friends and colleagues the gift of Safari Books Online! With an ever-expanding library of books and videos from more than 100 publishers (including Oracle Press), a subscription to Safari Books Online is the gift that always fits, helping your friends learn new skills and stay current. Starting at $42.99, gift subscriptions are available for 1, 3, 6 and 12 months. Get all of this and more at the Oracle Technology Network Member Discount Page!

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• Using prefix incremented loops in C#

  - by KChaloux

  Back when I started programming in college, a friend encouraged me to use the prefix incrementation operator ++i instead of the postfix i++, citing that there was a slight chance of better performance with no real chance of a downside. I realize this is true in C++, and it's become a general habit that I continue to do. I'm led to believe that it makes little to no difference when used in a loop in C#, regardless of data type. Apparently the ++ operator can't be overridden. Nevertheless, I like the appearance more, and don't see a direct downside to it. It did astonish a coworker just a moment ago though, he made the (fairly logical) assumption that my loop would terminate early as a result. He's a self-taught programmer, and apparently never came across the C++ convention. That made me question whether or not the equivalent behavior of pre- and post-fix increment and decrement operators in loops is well known enough. Is it acceptable for me to continue using ++i in looping constructs because of style preference, even though it has no real performance benefit? Or is it likely to cause confusion amongst other programmers? Note: This is assuming the ++i convention is used consistently throughout all code.

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• Should you create a class within a method?

  - by Amndeep7

  I have made a program using Java that is an implementation of this project: http://nifty.stanford.edu/2009/stone-random-art/sml/index.html. Essentially, you create a mathematical expression and, using the pixel coordinate as input, make a picture. After I initially implemented this in serial, I then implemented it in parallel due to the fact that if the picture size is too large or if the mathematical expression is too complex (especially considering the fact that I made the expression recursively), it takes a really long time. During this process, I realized that I needed two classes which implemented the Runnable interface as I had to put in parameters for the run method, which you aren't allowed to do directly. One of these classes ended up being a medium sized static inner class (not large enough to make an independent class file for it though). The other though, just needed a few parameters to determine some indexes and the size of the for loop that I was making run in parallel - here it is: class DataConversionRunnable implements Runnable { int jj, kk, w; DataConversionRunnable(int column, int matrix, int wid) { jj = column; kk = matrix; w = wid; } public void run() { for(int i = 0; i < w; i++) colorvals[kk][jj][i] = (int) ((raw[kk][jj][i] + 1.0) * 255 / 2.0); increaseCounter(); } } My question is should I make it a static inner class or can I just create it in a method? What is the general programming convention followed in this case?

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• Is a big name computer science degree worth the cost?

  - by Serplat

  I'm currently in High School and trying to look into what I want to do after I graduate. I know that I will be going to college, and that I want a degree in Computer Science, however, I'm not entirely sure where I want to go (I haven't started the application process yet). I already have built up a decent amount of experience in programming (over the summers I have been hired to program at a local university), and I'm pretty capable of teaching myself most of the material I've come across through either books or web documentation. I'm interested in whether it is worth it to get a degree from a major, big-name computer science university for $50,000 each year, as opposed to going to a local state school for only $20,000. For my Bachelor's degree alone, this would be $120,000 more than the state school. I've also heard that where you get your Bachelor's doesn't matter much if you plan to get a Master's degree. Many people recommend going somewhere like a state school for your Bachelor's, and then try to get into a more major school for your Master's. Has anybody found any truth in this? Basically, is going to a big name computer science school for a Bachelor's degree really worth the added expense?

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• Using runtime generic type reflection to build a smarter DAO

  - by kerry

  Have you ever wished you could get the runtime type of your generic class? I wonder why they didn’t put this in the language. It is possible, however, with reflection: Consider a data access object (DAO) (note: I had to use brackets b/c the arrows were messing with wordpress): public interface Identifiable { public Long getId(); } public interface Dao { public T findById(Long id); public void save(T obj); public void delete(T obj); } Using reflection, we can create a DAO implementation base class, HibernateDao, that will work for any object: import java.lang.reflect.Field; import java.lang.reflect.ParameterizedType; public class HibernateDao implements Dao { private final Class clazz; public HibernateDao(Session session) { // the magic ParameterizedType parameterizedType = (ParameterizedType) clazz.getGenericSuperclass(); return (Class) parameterizedType.getActualTypeArguments()[0]; } public T findById(Long id) { return session.get(clazz, id); } public void save(T obj) { session.saveOrUpdate(obj); } public void delete(T obj) { session.delete(obj); } } Then, all we have to do is extend from the class: public class BookDaoHibernateImpl extends HibernateDao { }

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