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• Multiplayer mobile games and coping with high latency

  - by liortal

  I'm currently researching regarding a design for an online (realtime) mobile multiplayer game. As such, i'm taking into consideration that latencies (lag) is going to be high (perhaps higher than PC/consoles). I'd like to know if there are ways to overcome this or minimize the issues of high latency? The model i'll be using is peer-to-peer (using Photon cloud to broadcast messages to all other players). How do i deal with a scenario where a message about a local object's state at time t will only get to other players at *t + HUGE_LAG* ?

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• How To Teach Independence

  - by Glenn Nelson

  In my IB Computer Science class I am routinely asked by... pretty much everyone how to do X or implement Y. I'm the only person with any significant programming experience in the class and I do not necessaries mind teaching people about programming but so many of the questions could be simply solved by doing a little investigating. What are some ways I could try to teach my fellow students how to be self-reliant programmers? All I can really think of is being a Google ninja & learning how to use an API.

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• org.openide.awt.ColorComboBox

  - by Geertjan

  It's the time of year when a lot of NetBeans Platform tutorials are being reviewed, revised, and rewritten. Today I'm looking at the NetBeans Platform Paint Application Tutorial. Suddenly I remembered seeing something in a recent API Changes document about a new class, ColorComboBox. That means I can make the tutorial a lot simpler, since Tim Boudreau's external ColorChooser.jar is now superfluous. Here's what the ColorComboBox looks like: It works perfectly. Of course, the nice thing about using that JAR was that it showed the user how to incorporate external JARs, but I'll make sure to make a note of that in the tutorial, along the lines of "If you don't like the NetBeans Platform color combobox, and would like to replace it with your own, such as Tim's ColorChooser.jar or a JavaFX color chooser, take the following steps." In short, if you're using NetBeans APIs, write this on your ceiling above your bed: http://bits.netbeans.org/dev/javadoc/apichanges.html, check that page regularly (mark it in your calendar to do first thing every Monday morning) and you'll be aware of the latest changes as they happen.

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• Tempescope Displays Weather by Recreating It

  - by Jason Fitzpatrick

  Yesterday we showed you an umbrella stand that signals raining/clear skies by color, today we have something even more interesting: an ambient desktop weather station that recreates the outside weather. The Tempescope pulls down the current weather report from Weather Underground’s API and feeds it to an Arduino board which in turn controls the device. When it’s raining, it pumps water down to simulate rain in the chamber. When there is lightening, LEDs flash. When there is cloud cover, an ultrasonic generator creates a fine mist inside the cylinder. Finally, on sunny days the entire thing glows warmly. To say that we want one would be an understatement. Hit up the link below to read more about the project, the display modes, and to peek inside the device. Prototyping “Tempescope”, An Ambient Weather Display [via Hack A Day] How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• Why is prefixing column names considered bad practice?

  - by P.Brian.Mackey

  According to a popular SO post is it considered a bad practice to prefix table names. At my company every column is prefixed by a table name. This is difficult for me to read. I'm not sure the reason, but this naming is actually the company standard. I can't stand the naming convention, but I have no documentation to back up my reasoning. All I know is that reading AdventureWorks is much simpler. In this our company DB you will see a table, Person and it might have column name: Person_First_Name or maybe even Person_Person_First_Name (don't ask me why you see person 2x) Why is it considered a bad practice to pre-fix column names? Are underscores considered evil in SQL as well? Note: I own Pro SQL Server 2008 - Relation Database design and implementation. References to that book are welcome.

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• How to store character moves (sprite animations)?

  - by Saad

  So I'm thinking about making a small rpg, mainly to test out different design patterns I've been learning about. But the one question that I'm not too sure on how to approach is how to store an array of character moves in the best way possible. So let's say I have arrays of different sprites. This is how I'm thinking about implementing it: array attack = new array (10); array attack2 = new array(5); (loop) //blit some image attack.push(imageInstance); (end loop) Now every time I want the animation I call on attack or attack2; is there a better structure? The problem with this is let's say there are 100 different attacks, and a player can have up to 10 attacks equipped. So how do I tell which attack the user has; should I use a hash map?

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• JavaOne - Java SE Embedded Booth - Digi - Home Health Hub (HHH)

  - by David Clack

  Hi All,  So another exciting platform we will have in the booth at JavaOne is the Digi  Home Health Hub (HHH) platform. http://www.digi.com/products/wireless-wired-embedded-solutions/single-board-computers/idigi-telehealth-application-kit#overview This is a Freescale reference design that has been built by Digi, the system is powered by a Freescale i.MX28 ARM SOC, what's really exciting me is it has every wireless protocol you could ever want on a single motherboard. Ethernet, 802.11b/g/n Wi-Fi, Bluetooth, ZigBee, configurable Sub-GHz radio, NFC plus USB, audio and LCD/touch screen option. I've been experimenting with lots of wireless capable healthcare products in the last few months, plus some Bluetooth Pulse / Oxy meters, we have been looking at how the actual healthcare wireless protocols work. Steve Popovich - Vice President, Digi Internationalwill be doing a talk at the Java Embedded @ JavaOne conference in the Hotel Nikko, right next door to the JavaOne show in the Hilton. If you are registered at JavaOne you can come over to the Java Embedded @ JavaOne for $100 Come see us in booth 5605 See you there Dave

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• How to retrieve old facebook/XMPP messages as well as new with kopete?

  - by searchfgold6789

  I have been considering using Kopete to use Facebook chat instead of logging on to Facebook with a web browser. That way, I can integrate messages with my KDE desktop better. The problem is, when I open Kopete, I am unable to see messages that I recieved in Facebook while Kopete was not opened. I can only see messages that I sent or received when Kopete was open. The same thing happens in Outlook.com (which is a website that connects to Facebook), Pidgin software, and other instant messaging tools. So my question is, how can I receive these messages with a desktop chat application in KDE, such as Kopete? Facebook has made their API publicly available to developers, and KDE has its own Facebook integration plugin. So it would seem achievable.

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• Announcing Four Weeks of SSIS MicroTraining!

  - by andyleonard

  For the next four Tuesdays – 29 Nov, 6 Dec, 13 Dec, and 20 Dec – I will deliver a 30 – 45 minute presentation beginning at 11:00 AM EST on Google+ . Please note Google+ limits attendance to the first ten people who join the Hangout and I have no control over who gets in. The topics will be: 29 Nov – “I See a Control Flow. Now What?” (Creating Your First SSIS Package) 6 Dec – The Incremental Load SSIS Design Pattern 13 Dec – Flat File Fu 20 Dec – SSIS Frameworks Magic Details 29 Nov – “I See a Control...(read more)

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• Speaking at Windows Phone 7 Developer Day Sarasota.NET Group - 1/19/2010

  - by Nikita Polyakov

  SarasotaDev January 2011 Meeting Windows Phone 7 Developer Day [note: this meeting starts at 4pm] The meeting date is Wednesday, January 19, 2011 at 4:00pm - 8:00pm. Location: Sarasota Community Foundation, at 2635 Fruitville Rd., Sarasota, FL 34237 (just west of Tuttle on the north side of Fruitville). We will have 3 speakers, including 2 Microsoft MVPs: Kevin Wolf and Nikita Polyakov, and joined by Russ Fustino. They will present various aspects of WinPhone 7 development, from Silverlight UI design, to instrumenting your apps for run-time analytics, through putting your application into the WinPhone Marketplace. There will be plenty of time for questions and discussion, and we're working on a sponsor for pizza. This will be a great session, even if you're not currently developing phone apps.   http://sarasotadev.net

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• Languages/Methods to Learn for Scientific Computing?:

  - by Zéychin

  I'm a second-semester Junior working towards a Computer Science degree with a Scientific Computing concentration and a Mathematics degree with a concentration on Applied Discrete Mathematics. So, number crunching and such rather than a bunch of regular expressions, interface design, and networking. I've found that I'm not learning new relevant languages from my coursework and am interested in what the community would recommend me to learn. I know as far as programming methods go, I need to learn more about parallelizing programs, but if there's anything else you can recommend, I would appreciate it. Here's a list of the languages with which I am very experienced (web technologies omitted as they barely apply here). Any recommendations for additional languages I should learn would be very much appreciated!: Java C C++ Fortran77/90/95 Haskell Python MATLAB

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• OmniGraffle for iPad Now Supports VGA Output

  - by pat.shepherd

  I have (surprisingly) gotten a lot of comments over the last post about using OmniGraffle as an interactive EA tool.  The news flash/update is that it now supports VGA output.  I had sent a note to the developers and they responded that this was a highly sought after feature…well, they delivered. I have tried it informally and it works, thought there is a little lag between the drawing on the screen and the output, but it is not terrible. So buy yourself a VGA adapter and start trying it out in JAD (Joint Architecture Design) sessions. Here is a link to a couple little OG tutorials: "What's OmniGraffle for iPad", you say? Let us show you! Use the link below to see watch a guided tour of the powerful diagraming tool for the iPad. Videos - OmniGraffle for iPad - Products - The Omni Group

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• TTS on App Engine

  - by yati sagade

  I have written a small front-end to the Festival TTS system using Python/Django. I wish to deploy it on the Google App Engine cloud. A few questions: My application uses the Festival app 'text2wave'. Will is work on the cloud? I have used Python primitives like subprocess.call() to invoke the aforementioned program. Will that work? If your answer to any or both of (1) and (2) is no, is there a free api on the web that I can use (from the appengine)? I read somewhere about placing calls from Phono to a Voxeo backend, but I'm not sure what that means. I am aware of the Google Translate extension that allows translation using an HTTP GET (REST) request, but here the text is limited to 100 chars. Bad. Plus, they may take it down any point of time.

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• Webinar Recording on Cross Platform Development with MonoTouch and Mono for Android

  - by Wallym

  The iPhone and Android are dominant in the marketplace. The two platforms currently have 85% of the smartphone marketplace and are continuing to grow that marketshare. Developers are being tasked with targeting these two platforms. In this session, we’ll take a high level look at how we can use c# and .NET knowledge to share code between iOS and and Android. We’ll look at linked files, using the Xamarin Mobile API, the challenges of running across platforms and frameworks, as well as other features of Visual Studio, Monotouch, MonoDevelop, and Mono for Android that allows us to write as much code that can run on both platforms.The following link is a recording on Cross Platform Development with MonoTouch and Mono for Android. I am guessing that the link only works in IE. That's out of my control.

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• why not use unmanaged safe code in c#

  - by user613326

  There is an option in c# to execute code unchecked. It's generally not advised to do so, as managed code is much safer and it overcomes a lot of problems. However I am wondering, if you're sure your code won't cause errors, and you know how to handle memory then why (if you like fast code) follow the general advice? I am wondering this since I wrote a program for a video camera, which required some extremely fast bitmap manipulation. I made some fast graphical algorithms myself, and they work excellent on the bitmaps using unmanaged code. Now I wonder in general, if you're sure you don't have memory leaks, or risks of crashes, why not use unmanaged code more often ? PS my background: I kinda rolled into this programming world and I work alone (I do so for a few years) and so I hope this software design question isn't that strange. I don't really have other people out there like a teacher to ask such things.

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• WIF, ADFS 2 and WCF&ndash;Part 5: Service Client (more Flexibility with WSTrustChannelFactory)

  - by Your DisplayName here!

  See the previous posts first. WIF includes an API to manually request tokens from a token service. This gives you more control over the request and more flexibility since you can use your own token caching scheme instead of being bound to the channel object lifetime. The API is straightforward. You first request a token from the STS and then use that token to create a channel to the relying party service. I’d recommend using the WS-Trust bindings that ship with WIF to talk to ADFS 2 – they are pre-configured to match the binding configuration of the ADFS 2 endpoints. The following code requests a token for a WCF service from ADFS 2: private static SecurityToken GetToken() {     // Windows authentication over transport security     var factory = new WSTrustChannelFactory(         new WindowsWSTrustBinding(SecurityMode.Transport),         stsEndpoint);     factory.TrustVersion = TrustVersion.WSTrust13;       var rst = new RequestSecurityToken     {         RequestType = RequestTypes.Issue,         AppliesTo = new EndpointAddress(svcEndpoint),         KeyType = KeyTypes.Symmetric     };       var channel = factory.CreateChannel();     return channel.Issue(rst); } Afterwards, the returned token can be used to create a channel to the service. Again WIF has some helper methods here that make this very easy: private static void CallService(SecurityToken token) {     // create binding and turn off sessions     var binding = new WS2007FederationHttpBinding(         WSFederationHttpSecurityMode.TransportWithMessageCredential);     binding.Security.Message.EstablishSecurityContext = false;       // create factory and enable WIF plumbing     var factory = new ChannelFactory<IService>(binding, new EndpointAddress(svcEndpoint));     factory.ConfigureChannelFactory<IService>();       // turn off CardSpace - we already have the token     factory.Credentials.SupportInteractive = false;       var channel = factory.CreateChannelWithIssuedToken<IService>(token);       channel.GetClaims().ForEach(c =>         Console.WriteLine("{0}\n {1}\n  {2} ({3})\n",             c.ClaimType,             c.Value,             c.Issuer,             c.OriginalIssuer)); } Why is this approach more flexible? Well – some don’t like the configuration voodoo. That’s a valid reason for using the manual approach. You also get more control over the token request itself since you have full control over the RST message that gets send to the STS. One common parameter that you may want to set yourself is the appliesTo value. When you use the automatic token support in the WCF federation binding, the appliesTo is always the physical service address. This means in turn that this address will be used as the audience URI value in the SAML token. Well – this in turn means that when you have an application that consists of multiple services, you always have to configure all physical endpoint URLs in ADFS 2 and in the WIF configuration of the service(s). Having control over the appliesTo allows you to use more symbolic realm names, e.g. the base address or a completely logical name. Since the URL is never de-referenced you have some degree of freedom here. In the next post we will look at the necessary code to request multiple tokens in a call chain. This is a common scenario when you first have to acquire a token from an identity provider and have to send that on to a federation gateway or Resource STS. Stay tuned.

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• sending credential to linkedIn website and get oauth_verifier without sign in again

  - by akash kumar

  i am facing problem regarding sending credentials to other website and after login(automatically not clicked on sign in here) and get oauth_verifier value Detail is bellow.... I want to send emailaddress and password through form(submit button)from my website(i.e liferay portal) to another website(suppose linkedIn) it should automatically authorize and return oauth_verifier to my website. that mean i dont want my website user to submit emailaddress and password to linkedIn again. actually i want to take emailaddress and password in my website and show the user LinkedIn connection,message,job posting in my website it self,i dont want to redirect user to LinkedIn website and sign in there and again come back to my website. I have taken consumer key and secret key from LinkedIn for my aplication. i am using linkedIn api and getting oauth_verifier for access token but for that i have to take user to LinkedIn for signIn, actually it should happen in backend

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• Microsoft Codename Dallas

  - by kaleidoscope

  Dallas is Microsoft’s Information Service offering which allows developers and information workers to find, acquire and consume published datasets and web services. Users subscribe to datasets and web services of interest and can integrate the information into their own applications via a standardized set of API’s. Data can also be analyzed online using the Dallas Service Explorer or externally using the Power Pivot Add-In for Excel. We can explore all the datasets and subscribe to the catalog for using the data. Dallas Developer Portal https://www.sqlazureservices.com More information can be found at:      http://channel9.msdn.com/learn/courses/Azure/Dallas/IntroToDallas/Overview/   Lokesh, M

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• RESTful Java on Steroids (Parleys, Podcast, ...)

  - by alexismp

  As reported previously here, the JAX-RS 2.0 (JSR 339) expert group is making good progress. If you're interested in what the future holds for RESTful Java web services, you can now watch Marek's Devoxx presentation or listen to him in the latest Java Spotlight Podcast (#74). Marek discusses the new client API, filters/handlers, BeanValidation integration, Hypermedia support (HATEOAS), server-side async processing and more. With JSR 339's Early Draft Review 2 currently out, another draft review is planned for April, the public review should be available in June while the final draft is currently scheduled for the end of the summer. In short, expect completion sometime before the end of 2012.

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• Why google is not crawling my website

  - by Aman Virk

  I am running a design and development blog http://www.thetutlage.com/ . From last couple of days my search traffic have been reduced from 70% to 10%. I myself is against black hat seo and all it do is write my own unique content almost everyday. Last week my search traffic was really good but now is dropping like heck. I have checked my webmasters dashboard and no message there from google. When i checked server logs i came to know last time google crawled my website was on 27 september 2012. Really i have no idea what i am doing wrong. I follow all google guidelines like bible, please help me

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• Save the date For AutoVue Enterprise Visualization at Oracle OpenWorld 2013

  - by Gerald Fauteux

  Planning to attend Oracle OpenWorld 2013 (September 22–26, 2013)?  If so, be sure to check out the various Enterprise Visualization activities that you can take advantage of while in San Francisco. Enterprise Visualization Sessions: CON8992 - Qualcomm Streamlines Its Design and Manufacturing Process with AutoVue/Agile Products. Click here for full session description. Customer Speakers: Mary Legaspi - Staff Systems Administrator and Ravi Sankaran - Sr. Staff Systems Analyst, Qualcomm CON8741 - Visual Information Navigator: Next-Generation Interaction Paradigm. Click here for full session description. Speakers: Rozita Naghshin - Sr. Principal Product Manager-Visual Information Navigator and Thierry Bonfante - Senior Director Product Development, Oracle Other Activities  There will be an “Oracle’s AutoVue & Visual Information Navigator" pod in the exhibit hall Come and meet Oracle’s Visualization experts at the SCM product lounge, and have exclusive 1 on 1 or group conversations with development and strategy experts.     Check back shortly for the dates and times of these activities

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• Using SMO to drop a SQL Database

  - by ybbest

  SQL Server Management Objects(SMO) is the API you can use to manipulate the sql server,like create databse and delete database. To get more details you can check the msdn documentation. There are 2 ways you can drop a database 1. You could create a Database object and call Drop method: Dim database As Database = New Database(Your database name) database.Drop() 2.However if you have existing connections to the database ,attempting to drop it using the above method will fail.Recall that when you try to drop the database from management studio ,you can tick the check box to close all the connections before drop the database.It is not so obvious , but you can do the exact same thing using SMO: Dim server As Server= New Server(ServerConn) server.KillAllProcesses(Your database name) server.KillDatabase(Your database name)

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• Artificial Intelligence implemented in x86 Assembly? [closed]

  - by Bigyellow Bastion

  Okay, so I decided that for my upcoming operating system, I do basically everything in x86 Assembly, using only 16-bit mode. I will need to write the software to host on it once I have something up and going, and I'll definitely post the source and VM-executable file. But as for now I'm stuck with the idea of implementing the AI code for some of the games I'm making to host on it. AI in Assembly is tedious, and sometimes almost impossible seeming, especially complex AI(I'm talking SNES Super Mario World 2: Yoshi's Island AI here, by the way, not pong AI). I was thinking that it'd be such a hassle that I'd have to bring a higher-level language to work some of this out here, like maybe C++ or C#, but I'd have to go through more work linking it into a fine binary that my OS will host, and that adds unnecessary work to the table I wanted to avoid(I don't want a complex system, I want everything as bare-bones as possible, avoiding libraries, APIs, and linkable formats for now, to make everything more directly accessible to the kernel's API).

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• C# creating a simple snake game

  - by Guy David

  I was thinking about creating a snake game with C#, so I ran ideas in my head, and some problems came up. How can I track and output in the correct location the blocks that run after the snake's head? If the snake is built of five blocks, and the user starts going in a circle, how can I print the snake body in the right location? Also, how can I create an action that will run on the background, which will move the snake forward, no matter what the user does? What structure should my code have? (code design structure) This should be a console application, since it's the only framework I am familiar with. I am not looking for finished code, since I want to really understand how it should work.

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• Are there any tools for testing drag & drop Windows desktop applications?

  - by Andrew

  I need to develop a Windows desktop application (win32 API) which will use drag & drop extensively in many formats, including my own. I need to test it, for example, with CF_TEXT dragging, CF_RTF, CF_DIB, CF_METAFILEPICT, and many others. The tool needs to have the following features: Displaying the content of DataObject dragged into it with all available format viewers. Allows preparation of a few samples of different clipboard formats together in a single DataObject, ready for dragging into my app. Allows including my own format names into the formats list of the testing tool.

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