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  • How can Swift be so much faster than Objective-C?

    - by Yellow
    Apple launched its new programming language Swift today. In the presentation, they made some performance comparisons between Objective-C and Python. The following is a picture of one of their slides, of a comparison of those three languages performing some complex object sort: There was an even more incredible graph about a performance comparison working on some encryption algorithm. Obviously this is a marketing talk, and they didn't go into detail on how this was implemented in each. I leaves me wondering though: how can a new programming language be so much faster? In this example, surely you just have a bad Objective-C compiler or you're doing something in a less efficient way? How else would you explain a 40% performance increase? I understand that garbage collection/automated reference control might produce some additional overhead, but this much?

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  • Finding the contact point with SAT

    - by Kai
    The Separating Axis Theorem (SAT) makes it simple to determine the Minimum Translation Vector, i.e., the shortest vector that can separate two colliding objects. However, what I need is the vector that separates the objects along the vector that the penetrating object is moving (i.e. the contact point). I drew a picture to help clarify. There is one box, moving from the before to the after position. In its after position, it intersects the grey polygon. SAT can easily return the MTV, which is the red vector. I am looking to calculate the blue vector. My current solution performs a binary search between the before and after positions until the length of the blue vector is known to a certain threshold. It works but it's a very expensive calculation since the collision between shapes needs to be recalculated every loop. Is there a simpler and/or more efficient way to find the contact point vector?

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  • Reminder - Mobile World Congress - 4 Industry Workshops

    - by michael.seback
    Got 4G? Paving the Road to Profitable and Efficient LTE Network Planning and Monetization, Register by emailing your details here. Achieving Management Excellence through Enterprise Performance Management, Register by emailing your details here. Offer Deliver and Monetize: Mobile Operator Strategies Consumer and Enterprise Services featuring Telenor and Vodafone Groups, Register by emailing your details here. Is Your Head in the Cloud? How to Get it Right the First Time, Register by emailing your details here. With more than 49,000 communications industry attendees, Mobile World Congress is where the industry comes together and you won't want to miss Oracle at this year's show. The 2011 conference agenda will feature speakers representing the leaders of the world's most innovative companies, both from within the Communications industry and from the growing number of adjacent market sectors joining our expanding mobile ecosystem. Join us to learn how Oracle enables innovative services while reducing the cost and complexity of infrastructure software and hardware.

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  • List of custom Launchers & Quicklists for Unity

    - by Nik
    Creating a custom launcher for Unity is simple. Quicklists provide an easy and efficient way to quickly access commonly used tasks for a specific application. NOTE: Starting with Ubuntu 11.10, this popup option has vanished. Launchers can now only be created by editing text files in your home folder. Creating a custom launcher is easy. Right-click on your desktop and click create a launcher. Edit the .desktop file using a text editor. (More information can be found here and here.) So, which custom launchers do you use on Unity? Note: Please limit yourself to one custom launcher per answer. Also, please provide a screenshot of it in action.

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  • How to do reflective collisions with particles hitting background tiles?

    - by Shawn LeBlanc
    In my 2d pixel old-school platformer, I'm looking for methods for bouncing particles off of background tiles. Particles aren't affected by gravity and collisions are "reflective". By that I mean a particle hitting the side of a square tile at 45 degrees should bounce off at 45 degrees as well. We can assume that tiles will always be perfectly square. No slopes or anything. What are efficient methods and algorithms to do this? I'd be implementing this on a Sega Genesis.

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  • How to Transfer Files Between Your PC and Android Phone Wirelessly

    - by Zainul Franciscus
    Mounting your Android phone to transfer files is fast and efficient, but nothing beats the convenience of a wireless file transfer. Today, we’ll show you how to transfer files between Android and your computer without a USB cable Latest Features How-To Geek ETC How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? Change Your MAC Address to Avoid Free Internet Restrictions Battlestar Galactica – Caprica Map of the 12 Colonies (Wallpaper Also Available) View Enlarged Versions of Thumbnail Images with Thumbnail Zoom for Firefox IntoNow Identifies Any TV Show by Sound Walk Score Calculates a Neighborhood’s Pedestrian Friendliness Factor Fantasy World at Twilight Wallpaper

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  • Collision filtering techniques

    - by Griffin
    I was wondering what efficient techniques are out there for mapping collision filtering between various bodies, sub-bodies, and so forth. I'm familiar with the simple idea of having different layers of 2D bodies, but this is not sufficient for more complex mapping: (Think of having sub-bodies of a body, such as limbs, collide with each other by placing them on the same layer, and then wanting to only have the legs collide with the ground while the arms would not) This can be solved with a multidimensional layer setup, but I would probably end up just creating more and more layers to the point where the simplicity and efficiency of layer filtering would be gone. Are there any more complex ways to solve even more complex situations than this?

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  • C# return variables

    - by pb01
    In a debate regarding return variables, some members of the team prefer a method to return the result directly to the caller, whereas others prefer to declare a return variable that is then returned to the caller (see code examples below) The argument for the latter is that it allows a developer that is debugging the code to find the return value of the method before it returns to the caller thereby making the code easier to understand: This is especially true where method calls are daisy-chained. Are there any guidelines as to which is the most efficient and/or are there any other reasons why we should adopt one style over another? Thanks private bool Is2(int a) { return a == 2; } private bool Is3(int a) { var result = a == 3; return result; }

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  • How to round currency values [migrated]

    - by Kenny
    I already have several ways to solve this, but I am interested in whether there is a better solution to this problem. Please only respond with a pure numeric algorithm. String manipulation is not acceptable. I am looking for an elegant and efficient solution. Given a currency value (ie $251.03), split the value into two half and round to two decimal places. The key is that the first half should round up and the second should round down. So the outcome in this scenario should be $125.52 and $125.51.

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  • Convert filenames to their checksum before saving to prevent duplicates. Is is a smart thing to do?

    - by Xananax
    TL;DR:what the title says I am developing some sort of image board in PHP. I was thinking of changing each image's filename to it's checksum prior to saving it. This way, I might be able to prevent duplicates. I know this wouldn't work for two images that are the same but differ in size or level of compression or whatnot, but this method would allow for an early check. What bugs me is that I never saw this method implemented anywhere, so I was wondering if there is a catch to it. Maybe it is just more efficient to keep the original filename and store the hash in DB? Maybe the whole method is just not useful and my question is moot? What do you think? On a side note, I don't really get how hashes are calculated so I was wondering, if my first question checks out, if it would be possible to calculate the likeness that two images are similar by comparing hashes (levenshtein or something of the sort).

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  • deciphering columnar transposition cipher

    - by Arfan M
    I am looking for an idea on how to decipher a columnar transposition cipher without knowing the key or the length of the key. When I take the cipher text as input to my algorithm I will guess the length of the key to be the factors of the length of the cipher text. I will take the first factor suppose the length was 20 letters so I will take 2*10 (2 rows and 10 columns). Now I want to arrange the cipher text in the columns and read it row wise to see if there is any word forming and match it with a dictionary if it is something sensible. If it matches the dictionary then it means it is in correct order or else I want to know how to make other combinations of the columns and read the string again row wise. Please suggest another approach that is more efficient.

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  • Oracle Database 11g Release 2 Now Available on 32-bit and x64 Windows

    - by jenny.gelhausen
    Oracle Database 11g Release 2 provides the foundation for IT to successfully deliver more information with higher quality of service, reduce the risk of change within IT, and make more efficient use of their IT budgets. By deploying Oracle Database 11g Release 2 as their data management foundation, organizations can utilize the full power of the world's leading database. Now Oracle Database 11g Release 2 is available for organizations using 32-bit and x64 Windows. Download either on OTN var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • CodePlex Daily Summary for Saturday, November 26, 2011

    CodePlex Daily Summary for Saturday, November 26, 2011Popular ReleasesTerminals: Version 2 - Beta 4 Release: Beta 4 Refresh Build Dont forget to backup your config files BEFORE upgrading! As usual, please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Updated the About form to include the date and time of the build. Useful for CI builds to ensure we have the correct version "Favourites" and "History" save their expanded states after app restarts Code cleanup, secu...MiniTwitter: 1.76: MiniTwitter 1.76 ???? ?? ?????????? User Streams ???????????? User Streams ???????????、??????????????? REST ?????????? ?????????????????????????????? ??????????????????????????????Media Companion: MC 3.424b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movie Show Resolutions... Resolved issue when reverting multiselection of movies to "-none-" Added movie rename support for subtitle files '.srt' & '.sub' Finalised code for '-1' fix - radiobutton to choose either filename or title Fixed issue with Movie Batch Wizard Fanart - ...Advanced Windows Phone Enginering Tool: WPE Downloads: This version of WPE gives you basic updating, restoring, and, erasing for your Windows Phone device.ASP.NET Comet Ajax Library (Reverse Ajax - Server Push): ASP.NET Reverse Ajax Samples: Chat, MVC Razor, DesktopClient, Reverse Ajax for VB.NET and C#Anno 2070 Assistant: Beta v1.0 (STABLE): Anno 2070 Assistant Beta v1.0 Released! Features Included: Complete Building Layouts for Ecos, Tycoons & Techs Complete Production Chains for Ecos, Tycoons & Techs Completed Credits Screen Known Issues: Not all production chains and building layouts may be on the lists because they have not yet been discovered. However, data is still 99.9% complete. Currently the Supply & Demand, including Calculator screen are disabled until version 1.1.Oil Prices: Oil Prices V1.1: Oil Prices V1.1 Fix Bangchak price listTAXILISM: TAXILISM V1.0: TAXILISMExamine: v1.4 - Beta: A fairly mega release which borrows some behaviors from the currently under development v2.0 version, this means there are some breaking changes which are listed below, though I don't think these breaking changes will affect many. FeaturesUpgraded DLLs to .Net 4.0 runtime Azure support No more file queue, all asynchronous operations are handled by .Net 4.0's async Task scheduling system, this not only increases performance but better handles async operations. Running in async mode will...Minemapper: Minemapper v0.1.7: Including updated Minecraft Biome Extractor and mcmap to support the new Minecraft 1.0.0 release (new block types, etc).Metro Pandora: Metro Pandora SDK V1: Metro Pandora aims to ship a Pandora SDK and apps for XAML .net platforms. For more information on this release please see Metro Pandora SDK Introduction. Supported platforms in V1: Windows Phone 7 / Silverlight Windows 8 .Net 4.0, WPF, WinformsVisual Leak Detector for Visual C++ 2008/2010: v2.2.1: Enhancements: * strdup and _wcsdup functions support added. * Preliminary support for VS 11 added. Bugs Fixed: * Low performance after upgrading from VLD v2.1. * Memory leaks with static linking fixed (disabled calloc support). * Runtime error R6002 fixed because of wrong memory dump format. * version.h fixed in installer. * Some PVS studio warning fixed.NetSqlAzMan - .NET SQL Authorization Manager: 3.6.0.10: 3.6.0.10 22-Nov-2011 Update: Removed PreEmptive Platform integration (PreEmptive analytics) Removed all PreEmptive attributes Removed PreEmptive.dll assembly references from all projects Added first support to ADAM/AD LDS Thanks to PatBea. Work Item 9775: http://netsqlazman.codeplex.com/workitem/9775VideoLan DotNet for WinForm, WPF & Silverlight 5: VideoLan DotNet for WinForm, WPF, SL5 - 2011.11.22: The new version contains Silverlight 5 library: Vlc.DotNet.Silverlight. A sample could be tested here The new version add and correct many features : Correction : Reinitialize some variables Deprecate : Logging API, since VLC 1.2 (08/20/2011) Add subitem in LocationMedia (for Youtube videos, ...) Update Wpf sample to use Youtube videos Many others correctionsSharePoint 2010 FBA Pack: SharePoint 2010 FBA Pack 1.2.0: Web parts are now fully customizable via html templates (Issue #323) FBA Pack is now completely localizable using resource files. Thank you David Chen for submitting the code as well as Chinese translations of the FBA Pack! The membership request web part now gives the option of having the user enter the password and removing the captcha (Issue # 447) The FBA Pack will now work in a zone that does not have FBA enabled (Another zone must have FBA enabled, and the zone must contain the me...SharePoint 2010 Education Demo Project: Release SharePoint SP1 for Education Solutions: This release includes updates to the Content Packs for SharePoint SP1. All Content Packs have been updated to install successfully under SharePoint SP1SQL Monitor - managing sql server performance: SQLMon 4.1 alpha 6: 1. improved support for schema 2. added find reference when right click on object list 3. added object rename supportBugNET Issue Tracker: BugNET 0.9.126: First stable release of version 0.9. Upgrades from 0.8 are fully supported and upgrades to future releases will also be supported. This release is now compiled against the .NET 4.0 framework and is a requirement. Because of this the web.config has significantly changed. After upgrading, you will need to configure the authentication settings for user registration and anonymous access again. Please see our installation / upgrade instructions for more details: http://wiki.bugnetproject.c...Free SharePoint 2010 Sites Templates: SharePoint Server 2010 Sites Templates: here is the list of sites templates to be downloadedVsTortoise - a TortoiseSVN add-in for Microsoft Visual Studio: VsTortoise Build 30 Beta: Note: This release does not work with custom VsTortoise toolbars. These get removed every time when you shutdown Visual Studio. (#7940) Build 30 (beta)New: Support for TortoiseSVN 1.7 added. (the download contains both setups, for TortoiseSVN 1.6 and 1.7) New: OpenModifiedDocumentDialog displays conflicted files now. New: OpenModifiedDocument allows to group items by changelist now. Fix: OpenModifiedDocumentDialog caused Visual Studio 2010 to freeze sometimes. Fix: The installer didn...New Projects1Internet: Branch of 1Intranet.ANX.Framework: The ANX.Framework is a platform independent game framework which is compatible with Microsofts XNA Framework.CBMMark: Commodore 8-bit benchmarking suitecodeplanner: A nuget package that will help you with architecture and generate code from T4 templates. 1. Create a new MVC3 (C#) Project 2. Install-Package codeplanner 3. Create your domainmodel (see documentation or readme.txt) 4. Create system by -> Scaffold CodePlanner.ScaffoldAllCommonLib: ???? C#????CoverFlow Project: This is a proyect that can we use like a control for own apps , its need some improvements like differents view and also some memory issue to get fix... if anyone can help me to improve please... NOTE: This coverflow reads bytes and then convert it to images thanks Dev.Net: The project aims creating development help pages, where user can find useful information about each referenced assembly. It also have an in-place editor for each page section and a versioning system to work with previously modified pages.EasyFramework: ?.net framework?????,???????????EPioneerCenter: Project Name:EPioneer Programming Language:C#ErSE253: General application for geostatistics estimations. Entirely written in C# designed to be readable and perform efficient calculations.FontysIsa2: FontysIsa2Kaos: Klinik Administrations og Oversigts SystemKinect Cursor Move: Kinect Cursor Move is a library that uses the Kinect for Windows SDK and its skeletal tracking features to allow a user to use their hands to control the Windows mouse cursor. The project is developped in / for c# only ...Mitutoyo 264-007 RS232 SPC Data Input Tool: This tool allows measurements to be recorded from Mitutoyo SPC measurement tools using the Mitutoyo RS232 Data Input Tool (part#: 264-007) by emulating a keyboard. It has many configurable options. It's developed in C#.NAU Airplane speech engine: Generates speech for airplain simulator, based on networking eventsProASPNETMVCInvest: This is the source code example for the book: <<Pro ASP.NET MVC2 Framework>>School Helper: Keep track of grades and upcoming assignments.Sheva engine 2: XNA game engineSimple Job Management: Simple job management solution created to handle less complicated jobs not tied to a larger scale project.StoreOnline: the latest versionVectorlib: A Library.WP7 toolkit by MSP: Some controls and utilites are made by MSP??????Judge Online: ??????Judge Online????????????。??????????????(?C、C++)???,?????????????,????????????????????????。???????????,???SNS????????。

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  • How can an SQL relational database be used to model a thesaurus? [closed]

    - by Miles O'Keefe
    I would like to design a web app that functions as a simple thesaurus: a long list of words with attributes, all of which are linked to each other. This thesaurus data model can be defined as: a controlled vocabulary arranged in a known order in which equivalence, hierarchical, and associative relationships among terms are clearly displayed and identified by standardized relationship indicators. My idea so far is to have one database in which every word is a table, and every table contains all words related to that word. e.g. Thesaurus(database) - happy(table) - excited(row)|cheerful(row)|lively(row) Is there are more efficient way to store words and their relationship to other words in a relational SQL database?

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  • C#/.NET Little Wonders: Static Char Methods

    - by James Michael Hare
    Once again, in this series of posts I look at the parts of the .NET Framework that may seem trivial, but can help improve your code by making it easier to write and maintain. The index of all my past little wonders posts can be found here. Often times in our code we deal with the bigger classes and types in the BCL, and occasionally forgot that there are some nice methods on the primitive types as well.  Today we will discuss some of the handy static methods that exist on the char (the C# alias of System.Char) type. The Background I was examining a piece of code this week where I saw the following: 1: // need to get the 5th (offset 4) character in upper case 2: var type = symbol.Substring(4, 1).ToUpper(); 3:  4: // test to see if the type is P 5: if (type == "P") 6: { 7: // ... do something with P type... 8: } Is there really any error in this code?  No, but it still struck me wrong because it is allocating two very short-lived throw-away strings, just to store and manipulate a single char: The call to Substring() generates a new string of length 1 The call to ToUpper() generates a new upper-case version of the string from Step 1. In my mind this is similar to using ToUpper() to do a case-insensitive compare: it isn’t wrong, it’s just much heavier than it needs to be (for more info on case-insensitive compares, see #2 in 5 More Little Wonders). One of my favorite books is the C++ Coding Standards: 101 Rules, Guidelines, and Best Practices by Sutter and Alexandrescu.  True, it’s about C++ standards, but there’s also some great general programming advice in there, including two rules I love:         8. Don’t Optimize Prematurely         9. Don’t Pessimize Prematurely We all know what #8 means: don’t optimize when there is no immediate need, especially at the expense of readability and maintainability.  I firmly believe this and in the axiom: it’s easier to make correct code fast than to make fast code correct.  Optimizing code to the point that it becomes difficult to maintain often gains little and often gives you little bang for the buck. But what about #9?  Well, for that they state: “All other things being equal, notably code complexity and readability, certain efficient design patterns and coding idioms should just flow naturally from your fingertips and are no harder to write then the pessimized alternatives. This is not premature optimization; it is avoiding gratuitous pessimization.” Or, if I may paraphrase: “where it doesn’t increase the code complexity and readability, prefer the more efficient option”. The example code above was one of those times I feel where we are violating a tacit C# coding idiom: avoid creating unnecessary temporary strings.  The code creates temporary strings to hold one char, which is just unnecessary.  I think the original coder thought he had to do this because ToUpper() is an instance method on string but not on char.  What he didn’t know, however, is that ToUpper() does exist on char, it’s just a static method instead (though you could write an extension method to make it look instance-ish). This leads me (in a long-winded way) to my Little Wonders for the day… Static Methods of System.Char So let’s look at some of these handy, and often overlooked, static methods on the char type: IsDigit(), IsLetter(), IsLetterOrDigit(), IsPunctuation(), IsWhiteSpace() Methods to tell you whether a char (or position in a string) belongs to a category of characters. IsLower(), IsUpper() Methods that check if a char (or position in a string) is lower or upper case ToLower(), ToUpper() Methods that convert a single char to the lower or upper equivalent. For example, if you wanted to see if a string contained any lower case characters, you could do the following: 1: if (symbol.Any(c => char.IsLower(c))) 2: { 3: // ... 4: } Which, incidentally, we could use a method group to shorten the expression to: 1: if (symbol.Any(char.IsLower)) 2: { 3: // ... 4: } Or, if you wanted to verify that all of the characters in a string are digits: 1: if (symbol.All(char.IsDigit)) 2: { 3: // ... 4: } Also, for the IsXxx() methods, there are overloads that take either a char, or a string and an index, this means that these two calls are logically identical: 1: // check given a character 2: if (char.IsUpper(symbol[0])) { ... } 3:  4: // check given a string and index 5: if (char.IsUpper(symbol, 0)) { ... } Obviously, if you just have a char, then you’d just use the first form.  But if you have a string you can use either form equally well. As a side note, care should be taken when examining all the available static methods on the System.Char type, as some seem to be redundant but actually have very different purposes.  For example, there are IsDigit() and IsNumeric() methods, which sound the same on the surface, but give you different results. IsDigit() returns true if it is a base-10 digit character (‘0’, ‘1’, … ‘9’) where IsNumeric() returns true if it’s any numeric character including the characters for ½, ¼, etc. Summary To come full circle back to our opening example, I would have preferred the code be written like this: 1: // grab 5th char and take upper case version of it 2: var type = char.ToUpper(symbol[4]); 3:  4: if (type == 'P') 5: { 6: // ... do something with P type... 7: } Not only is it just as readable (if not more so), but it performs over 3x faster on my machine:    1,000,000 iterations of char method took: 30 ms, 0.000050 ms/item.    1,000,000 iterations of string method took: 101 ms, 0.000101 ms/item. It’s not only immediately faster because we don’t allocate temporary strings, but as an added bonus there less garbage to collect later as well.  To me this qualifies as a case where we are using a common C# performance idiom (don’t create unnecessary temporary strings) to make our code better. Technorati Tags: C#,CSharp,.NET,Little Wonders,char,string

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  • Berkeley DB Java Edition 4.0.103 Available

    - by charles.lamb
    We'd like to let you know that JE 4.0.103 is now at http://www.oracle.com/technology/software/products/berkeley-db/je/index.html. The patch release contains both small features and bug fixes, many of which were prompted by feedback on this forum. Some items to note: New CacheMode values for more control over cache policies, and new statistics to enable better interpretation of caching behavior. These are just one initial part of our continuing work in progress to make JE caching more efficient. Fixes for proper cache utilization calculations when using the -XX:+UseCompressedOops JVM option. A variety of other bug fixes. There is no file format or API changes. As always, we encourage users to move promptly to this new release.

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  • Looking for literature about graphics pipeline optimization

    - by zacharmarz
    I am looking for some books, articles or tutorials about graphics architecture and graphics pipeline optimizations. It shouldn't be too old (2008 or newer) - the newer, the better. I have found something in [Optimising the Graphics Pipeline, NVIDIA, Koji Ashida] - too old, [Real-time rendering, Akenine Moller], [OpenGL Bindless Extensions, NVIDIA, Jeff Bolz], [Efficient multifragment effects on graphics processing units, Louis Frederic Bavoil] and some internet discussions. But there is not too much information and I want to read more. It should contain something about application, driver, memory and shader units communication and data transfers. About vertices and attributes. Also pre and post T&L cache (if they still exist in nowadays architectures) etc. I don't need anything about textures, frame buffers and rasterization. It can also be about OpenGL (not about DirecX) and optimizing extensions (not old extensions like VBOs, but newer like vertex_buffer_unified_memory).

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  • BizTalk Server 2010 Beta available

    - by Rajesh Charagandla
    BizTalk Server 2010 Beta - Click Here to Download Overview: BizTalk Server 2010 offers significant enhancements to help integrate heterogeneous Line-of-business systems with Windows .NET and SharePoint based applications to optimize user productivity, gain business efficiency and increase agility . BizTalk Server 2010 allow .Net developers to take advantage of BizTalk services right out of the box to rapidly build solutions that need to integrate transactions and data from applications like SAP, Mainframes, MS Dynamics and Oracle. Similarly SharePoint developers can seamlessly use BizTalk services directly through the new Business Connectivity Services in SharePoint 2010. BizTalk Server 2010 includes new data mapping & transformation tool to dramatically reduce the development time to mediate data exchange between disparate systems. It also provide a new single dashboard to manage performance parameters and streamline deployments from development to test to production. BizTalk 2010 includes new, scalable Trading Partner Management (TPM) model with a graphical interface for flexible management of business partner relationships and efficient on-boarding process.

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  • Coherence 3.7.1 Released

    - by JuergenKress
    Oracle Coherence 3.7.1 introduces REST API, exalogic infiniband integration, improved data access performance due to more efficient in-memory and disk-based storage, and query explain plan support and much more, download now! View the webcast: Unbeatable Performance for your Cloud Application Foundation. To download Coherence 3.7.1 please visit OTN. Coherence Screencasts: Coherence 3.7.1 – Extend Only Keys Coherence 3.7.1 – REST Support Coherence 3.7.1 – POF Object Identities and References Coherence 3.7.1 – POF Annotation Support Coherence 3.7.1 – Query Explain Plan For more information please visit the Oracle Coherence Knowledge Base For regular Coherence information become a member in the WebLogic Partner Community please first login at http://partner.oracle.com and then visit: http://www.oracle.com/partners/goto/wls-emea Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Coherence,Coherence 3.7.1,Oracle,WebLogic,J2EE caching,OPN,Jürgen Kress

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  • Best practices for periodically saving game state to disk

    - by Ben Morris
    I'm working on an MMO. All of the player and environment data lives on a server and is kept in memory. There's a "world" object which keeps track of all of the maps, characters, etc. and their relations to each other. To avoid data loss in case of a crash, I've been periodically serializing the world to disk. The trouble is, this object can be quite large, so when the server starts writing, there's noticeable in-game slowdown for a few seconds, which I'd like to avoid. Any pointers on how to go about this in a more efficient way?

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  • How do you get aware of new tools?

    - by Konstantin Petrukhnov
    How do you get aware of new tools (libraries, applications, etc)? This question is only about "getting aware" that some tool exist and could be used. Learning and trying is different issue. Right now I get most awareness from stackexchange and freshmeat sites. But I wonder if there are more efficient way. E.g. 80% of freshmeat projects are no-use for me, but it reasonable overhead, because tools that I find trough it save me days or even weeks. Here are some related, but a bit different questions: How much time do you invest in exploring new technology? How to become aware of new languages, techniques and methodologies? What website are you using most to keep you updated on software development?

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  • Behavior-Driven Development / Use case diagram

    - by Mik378
    Regarding growing of Behavior-Driven Development imposing acceptance testing, are use cases diagram useful or do they lead to an "over-documentation"? Indeed, acceptance tests representing specifications by example, as use cases promote despite of a more generic manner (since cases, not scenarios), aren't they too similar to treat them both at the time of a newly created project? From this link, one opinion is: Another realization I had is that if you do UseCases and automated AcceptanceTests you are essentially doubling your work. There is duplication between the UseCases and the AcceptanceTests. I think there is a good case to be made that UserStories + AcceptanceTests are more efficient way to work when compared to UseCases + AcceptanceTests. What to think about?

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  • Trying to develop a game with android for cracking glasses in different dimensions

    - by user46514
    I am trying to develop a game in android where I will have to punch a hole to get through the glass but not shatter the glass completely. The glass will show up in different forms of polygons and when a hole is created by a projectile, the rest of the polygon will still remain intact.Only a polygonal opening will get created at the point of impact with the projectile. I am new at game design in android but I was thinking that I would create a random polygon shape to show in the path and then at the point where the projectile hits it, I could create a glass polygon to create a splinter effect. The rest of the part of the glass that is randomly created at the point of impact, I could further splinter it into polygons flying at different angle. since I also need to capture the bits of glasses flying off and falling down with gravity. Is my solution the best efficient one at performance of threads or is there a better solution for this glass breaking effect. Thanks Dhiren

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  • Use Your PC to Keep Yourself Entertained While Traveling for the Holidays

    - by Justin Garrison
    Staying connected may be hard no matter what network you are on, and in flight Wi-Fi isn’t pervasive enough to count on. Here are tips and tricks to keep yourself entertained when unplugged and traveling. Image Via MarinaAvila Latest Features How-To Geek ETC How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Is Your Desktop Printer More Expensive Than Printing Services? 20 OS X Keyboard Shortcuts You Might Not Know HTG Explains: Which Linux File System Should You Choose? HTG Explains: Why Does Photo Paper Improve Print Quality? Ubuntu Font Family Now Available for Download Oh No! WikiLeaks Published Santa Claus’s Naughty List [Video] Remember the Milk Now Supports HTTPS Encryption for the Entire Session MTCrypt Is an Efficient Front End for Mounting TrueCrypt Volumes 10 Things You Should Do with Your New Android Phone Walking Through the Park on a Snowy Night Wallpaper

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  • Storing Attendance Data in database

    - by Ali Abbas
    So i have to store daily attendance of employees of my organisation from my application . The part where I need some help is, the efficient way to store attendance data. After some research and brain storming I came up with some approaches . Could you point me out which one is the best and any unobvious ill effects of the mentioned approaches. The approaches are as follows Create a single table for whole organisation and store empid,date,presentstatus as a row for every employee everyday. Create a single table for whole organisation and store a single row for each day with a comma delimited string of empids which are absent. I will generate the string on my application. Create different tables for each department and follow the 1 method. Please share your views and do mention any other good methods

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