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• How do I create my own programming language and a compiler for it

  - by Dave

  I am thorough with programming and have come across languages including BASIC, FORTRAN, COBOL, LISP, LOGO, Java, C++, C, MATLAB, Mathematica, Python, Ruby, Perl, JavaScript, Assembly and so on. I can't understand how people create programming languages and devise compilers for it. I also couldn't understand how people create OS like Windows, Mac, UNIX, DOS and so on. The other thing that is mysterious to me is how people create libraries like OpenGL, OpenCL, OpenCV, Cocoa, MFC and so on. The last thing I am unable to figure out is how scientists devise an assembly language and an assembler for a microprocessor. I would really like to learn all of these stuff and I am 15 years old. I always wanted to be a computer scientist someone like Babbage, Turing, Shannon, or Dennis Ritchie. I have already read Aho's Compiler Design and Tanenbaum's OS concepts book and they all only discuss concepts and code in a high level. They don't go into the details and nuances and how to devise a compiler or operating system. I want a concrete understanding so that I can create one myself and not just an understanding of what a thread, semaphore, process, or parsing is. I asked my brother about all this. He is a SB student in EECS at MIT and hasn't got a clue of how to actually create all these stuff in the real world. All he knows is just an understanding of Compiler Design and OS concepts like the ones that you guys have mentioned (i.e. like Thread, Synchronization, Concurrency, memory management, Lexical Analysis, Intermediate code generation and so on)

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• Announcing Oracle Environmental Accounting and Reporting

  - by Theresa Hickman

  Oracle just launched a new product called Oracle Environmental Accounting and Reporting designed to help company’s track and report their greenhouse emissions at the operational level.  Companies around the world are facing increasing pressure to improve their energy efficiency and reduce waste in their operations. Also, new worldwide greenhouse gas legislation is putting added pressure on companies to report the impact of their emissions and energy usage on the environment. Today, companies undergo extensive and expensive data audits to maintain a ledger of up-to-date emissions factors that compare figures on an annual basis. Existing “ad hoc” approaches utilizing manual or niche solutions have a high operational cost and weak data security and audit-ability. The ideal solution is to embed environmental usage within the mainstream business operations, such as recording energy usage at the time of invoice entry, and then report on those results. This is precisely what Oracle Environmental Accounting and Reporting is designed to do. You can now capture environmental data either electronically or manually; convert that to greenhouse gas emissions; comply with mandatory and voluntary greenhouse gas reporting schemes; and identify opportunities for CO2 emissions and cost reductions.   Oracle recently acquired the intellectual property for this solution which works with both Oracle E-Business Suite Release 12 and JD Edwards EnterpriseOne Release 9.0. For more information, visit Oracle Environmental Accounting and Reporting.

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• Euler Problem 1 : Code Optimization / Alternatives [on hold]

  - by Sudhakar

  I am new bee into the world of Datastructures and algorithms from ground up. This is my attempt to learn. If the question is very plain/simple . Please bear with me. Problem: Find the sum of all the multiples of 3 or 5 below 1000. Code i worte: package problem1; public class Problem1 { public static void main(String[] args) { //******************Approach 1**************** long start = System.currentTimeMillis(); int total = 0; int toSubtract = 0; //Complexity N/3 int limit = 10000; for(int i=3 ; i<limit ;i=i+3){ total = total +i; } //Complexity N/5 for(int i=5 ; i<limit ;i=i+5){ total = total +i; } //Complexity N/15 for(int i=15 ; i<limit ;i=i+15){ toSubtract = toSubtract +i; } //9N/15 = 0.6 N System.out.println(total-toSubtract); System.out.println("Completed in "+(System.currentTimeMillis() - start)); //******************Approach 2**************** for(int i=3 ; i<limit ;i=i+3){ total = total +i; } for(int i=5 ; i<limit ;i=i+5){ if ( 0 != (i%3)) total = total +i; } } } Question 1 - Which best approach from the above code and why ? 2 - Are there any better alternatives ?

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• Happy New Year! Back to school :)

  - by Jim Wang

  A brand new year is upon us and it’s time to get cracking with WebMatrix again…and go back to school :).  Last year we ran a successful product walkthrough for WebMatrix Beta 2 with our students from around the world, gathering awesome feedback for the final version of WebMatrix which is coming soon!  I’d like to take this chance to thank all the students who participated in this effort…you have really helped make the final product much better than it would have been otherwise. In 2011, we’re looking, as always, at bigger and better things.  One of the ideas that has been floating around is the concept of a WebMatrix college course that you could take for actual credit.  Of course, this is going to require coordination with college educators, but we think we’re up to the challenge :) If your school is still using an antiquated language to teach their web development 101 course, and you’d like to switch to WebMatrix, we’d like to hear your voice – better yet if you have contacts from your school and would like to be one of the first to give the program a try!  Comment on this post or email wptsdrext at microsoft.com.  We look forward to partnering with you guys ^^.

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• Attempting to install netgear N300 Wireless USB Adapter on Ubuntu without a present internet connection

  - by Liz

  Hello Linux/Ubuntu world out there. I don't have internet presently on the desktop I am trying to install the USB wireless adapter on. This seems to be the problem, which if the hardware would work would theoretically fix the problem. I can NOT access the internet via anything but wireless. I am presently on my laptop searching for answers while trying to install this little device. So any advice will have to take that into account. Now I have tried so far, using WINE which does not want to work, I have tried Windows Wireless Drivers which doesn't want to work, I have tried Software Sources, Other Software and it will not acknowledge the cdrom as a repository stating errors like E:Unable to stat the mount point /cdrom/ -stat (2: No such file or directory) However I can open the CD icon on my computer and access and browse the files. The computer can read the CD. I can read the CD. I've tried just plugging it in and seeing if the computer will automatically recognize the hardware, and go from there. That does not work either. I have tested USB port to just verify that the USB port works. It does. My laptop recognizes the hardware, and would easily install the software if I prompted it to. The difference is that my laptop is Vista, and I HATE Vista. Any tips, tricks?

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• Cloud Computing - just get started already!

  - by BuckWoody

  OK - you've been hearing about "cloud" (I really dislike that term, but whatever) for over two years. You've equated it with just throwing some VM's in some vendor's datacenter - which is certainly part of it, but not the whole story. There's a whole world of - wait for it - *coding* out there that you should be working on. If you're a developer, this is just a set of servers with operating systems and the runtime layer (like.NET, Java, PHP, etc.) that you can deploy code to and have it run. It can expand in a horizontal way, allowing massive - and I really, honestly mean massive, not just marketing talk kind of scale. We see this every day. If you're not a developer, well, now's the time to learn. Explore a little. Try it. We'll help you. There's a free conference you can attend in November, and you can sign up for it now. It's all on-line, and the tools you need to code are free. Put down Facebook and Twitter for a minute - go sign up. Learn. Do. :) See you there. http://www.windowsazureconf.net/

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• A Panorama of JavaOne Latin America

  - by reza_rahman

  As you know, JavaOne Latin America 2012 was held at the Transamerica Expo Center in Sao Paulo, Brazil on December 4-6. It was a resounding success with a great vibe, excellent technical content and numerous world class speakers, both local and international. Various folks like Tori Wieldt, Steve Chin, Arun Gupta, Bruno Borges and myself looked at the conference from slightly different colored lenses. It's interesting to put them all together in a panoramatic collage: Tori wrote about the Sao Paulo Geek Bike Ride held the Saturday before the conference here (enjoy the photos and video). She also discusses the keynotes in great detail here. Steve looked at it from the viewpoint of someome instrumental to putting the event together. Read his thoughts here (he has more geek bike ride photos as well as material for his JavaFX/HTML 5 talk). Arun had a more holistic view of the conference. He covers the geek bike ride, the GlassFish party (organized by Bruno Borges), his Java EE talks, and more. Check out the cool photos as well as the technical material. Bruno provides the critical local perspective in his 7 reasons you had to be at JavaOne Latin America 2012. He discusses the OTN Lounge, the hands-on-lab, the Java community keynote, Java EE technical sessions and of course the GlassFish party! I covered the GlassFish booth, the lab and my technical sessions (as well as Sao Paulo's lively metal underground) here.

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• One Does Like To Code: DevoxxUK

  - by Tori Wieldt

  What's happening at Devoxx UK? I'll be talking to Rock Star speakers, Community leaders, authors, JSR leads and more.  This video is a short introduction.   Check out these great sessions: Thursday, June 12Perchance to Stream with Java 8by Paul Sandoz13:40 - 14:30 | Room 1 Making the Internet-of-Things a Reality with Embedded Javaby Simon Ritter11:50 - 12:40 | Room 4 Java SE 8 Lambdas and Streams Labby Simon Ritter17:00 - 20:00 | Room Mezzanine Safety Not Guaranteed: Sun. Misc. Unsafe and the Quest for Safe Alternativesby Paul Sandoz18:45 - 19:45 | Room 3 Join the Java EvolutionHeather VanCuraPatrick Curran19:45 – 20:45 | Room 2  Glassfish is Here to StayDavid DelabasseeAntonio Goncalves19:45 – 20:45 | Room Expo Here is the full line-up of sessions. Devoxx UK includes a Hackergarten, where can devs work an Open Source project of their choice. The Adopt OpenJDK and Adopt a JSR Program folks will be there to help attendees contribute back to Java SE and Java EE itself!   Saturday includes a special Devoxx4Kids event in conjunction with the London Java Community. It's design to teach 10-16 year-olds simple programming concepts, robotics, electronics, and games making. Workshops include LEGO Mindstorms (robotic engineering), Greenfoot (programming), Arduino (electronics), Scratch (games making), Minecraft Modding (game hacking) and NAO (robotic programming). Small fee, you must register. If you can't attend Devoxx UK in person, stay tuned to the YouTube/Java channel. I'll be doing plenty of interviews so you can join the fun from around the world. 

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• Starting an HTML canvas game with no graphics skills

  - by Jacob

  I want to do some hobby game development, but I have some unfortunate handicaps that have me stuck in indecision; I have no artistic talent, and I also have no experience with 3D graphics. But this is just a hobby project that might not go anywhere, so I want to develop the stuff I care about; if the game shows good potential, my graphic "stubs" can be replaced with something more sophisticated. I do, however, want my graphics engine to render something approximate to the end goal. The game is tile-based, with each tile being a square. Each tile also has an elevation. My target platform (subject to modification) is JavaScript rendering to the HTML 5 canvas, either with a 2D or WebGL context. My question to those of you with game development experience is whether it's easier to develop an isometric game using a 2D graphics engine and sprites or a 3D game using rudimentary 3D primitives and basic textures? I realize that there are limitations to isometric projection, but if it makes developing my throwaway graphics engine easier, I'm OK with the visual warts that would be introduced. Or is representing a 3D world with an actual 3D engine easier?

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• CodePlex Daily Summary for Wednesday, July 30, 2014

  CodePlex Daily Summary for Wednesday, July 30, 2014Popular ReleasesGhostscript.NET: Ghostscript.NET v.1.1.9.: v.1.1.9. fixed problem with the PDF invisible layers (the optional content groups which will be left unmarked if processtrailerattrs is not executed). fixed text rasterization problem for some pdf's, it seems that the 'pdfopen begin' did not initialize everything required to render pdf properly so we replaced it with the 'runpdfopen' method which corrects everything (problem reported by "xatabhk"). changed GhostscriptRasterizer methods to support Stream insted of the MemoryStream. fixed...Recaptcha for .NET: Recaptcha for .NET v1.5: What's NewMinor bug fixes Support for legacy .NET framework 4.0 and ASP.NET MVC 4. Support for .NET Framework 4.5.1.Azure Storage Explorer: Azure Storage Explorer 6 Preview 1: Welcome to Azure Storage Explorer 6 Preview 1 This is the first release of the latest Azure Storage Explorer, code-named Phoenix. What's New?Here are some important things to know about version 6: Open Source Now being run as a full open source project. Full source code on CodePlex. Collaboration encouraged! Updated Code Base Brand-new code base (WPF/C#/.NET 4.5) Visual Studio 2013 solution (previously VS2010) Uses the Task Parallel Library (TPL) for asynchronous background operat...Wsus Package Publisher: release v1.3.1407.29: Updated WPP to recognize the very latest console version. Some files was missing into the latest release of WPP which lead to crash when trying to make a custom update. Add a workaround to avoid clipboard modification when double-clicking on a label when creating a custom update. Add the ability to publish detectoids. (This feature is still in a BETA phase. Packages relying on these detectoids to determine which computers need to be updated, may apply to all computers).VG-Ripper & PG-Ripper: PG-Ripper 1.4.32: changes NEW: Added Support for 'ImgMega.com' links NEW: Added Support for 'ImgCandy.net' links NEW: Added Support for 'ImgPit.com' links NEW: Added Support for 'Img.yt' links FIXED: 'Radikal.ru' links FIXED: 'ImageTeam.org' links FIXED: 'ImgSee.com' links FIXED: 'Img.yt' linksAsp.Net MVC-4,Entity Framework and JQGrid Demo with Todo List WebApplication: Asp.Net MVC-4,Entity Framework and JQGrid Demo: Asp.Net MVC-4,Entity Framework and JQGrid Demo with simple Todo List WebApplication, Overview TodoList is a simple web application to create, store and modify Todo tasks to be maintained by the users, which comprises of following fields to the user (Task Name, Task Description, Severity, Target Date, Task Status). TodoList web application is created using MVC - 4 architecture, code-first Entity Framework (ORM) and Jqgrid for displaying the data.Waterfox: Waterfox 31.0 Portable: New features in Waterfox 31.0: Added support for Unicode 7.0 Experimental support for WebCL New features in Firefox 31.0:New Add the search field to the new tab page Support of Prefer:Safe http header for parental control mozilla::pkix as default certificate verifier Block malware from downloaded files Block malware from downloaded files audio/video .ogg and .pdf files handled by Firefox if no application specified Changed Removal of the CAPS infrastructure for specifying site-sp...SuperSocket, an extensible socket server framework: SuperSocket 1.6.3: The changes below are included in this release: fixed an exception when collect a server's status but it has been stopped fixed a bug that can cause an exception in case of sending data when the connection dropped already fixed the log4net missing issue for a QuickStart project fixed a warning in a QuickStart projectYnote Classic: Ynote Classic 2.8.5 Beta: Several Changes - Multiple Carets and Multiple Selections - Improved Startup Time - Improved Syntax Highlighting - Search Improvements - Shell Command - Improved StabilityTEBookConverter: 1.2: Fixed: Could not start convertion in some cases Fixed: Progress show during convertion was truncated Fixed: Stopping convertion didn't reset program titleSharePoint 2010 & 2013 Google Maps V3 WebPart: SPGoogleMap webpart - SharePoint 2013 - July 2014: Google API key support added. The webpart does not need it but if you have one you can use it.QuieNet: Version 2.0: Replaced autoplay prevention mechanism: instead of replacing the player itself, only the function that starts the player is replaced. This only works for video players for now, and live streams are handled as before.XamlImageConverter: Xaml Image Converter 3.11: Improvements: - ASP.NET 64bit support for html2pdf. - Attribute to suppress parallel execution. - Ghostscript rendering. - No need for a snapshot for a imagemap, you can use original svg image.Automatic Parallel Computing: APC SDK 2.1: Features: integration with Amazon DynamoDB. Includes: Investment Club Benchmark Investor Ranking BenchmarkCatchException (Manage Exception): CatchMe Exception Version 1.0: Code SourceDnnFoundation Skin for DnnCMS: DnnC DnnFoundation Skin: First release of the DnnC DnnFoundation SkinQND Operations Manager SNMP Monitoring: QND.SNMP.Library version 1.0.0.103: fixed bug #1815FlMML customized: FlMML customized c.s.30938: ????????LFO、?????LFO??????。 ???·Y·????LFO、??????????????????。 ???LFO????????????????????。CS-Script Source: Release v3.8.4: CSScript.Evaluator is migrated to Mono v3.3.0 Added aggregating //css_ignore_ns from the imported scripts cs-script.7z - CS-Script Suite (binaries, documentation, samples) cs-script.ExtensionPack.7z - CS-Script Extension Pack (additional binaries and samples) cs-scriptDocs.7z - CS-Script DocumentationDotSpatial: DotSpatial 1.7: DotSpatial.Full - includes all DotSpatial libraries, extensions and DemoMap application DotSpatial.Core - includes only DotSpatial core libraries Entire list of changes see in the issue tracker. Main changes: Improved common stability, optimized memory and speed when loading and rendering shapefiles, fixed some memory leaks in rasters and shape layers. Simplified plugin infrastructure. Now there are predefined implementations for all required components (IStatusControl, IDockManager, IHead...New ProjectsAdmin QuikView for Dynamics CRM 2013: Admin QuickView is a gives you a quick hierarchical snapshot of all active Business Units, Teams, Security Roles and Users in your Dynamics CRM Organization.All bots: Windows Phone app to chat with bots from http://www.pandorabots.com/Calculator Proj: Calculator with power hexadecimal binary option and more... Computational Network Toolkit (CNTK): Computational networks (CNs) generalize models that can be described as a series of computational steps such as DNN, CNN, RNN, LSTM, and maximum entropy models.DelegateExpressionizer: Library is intended to decompile delegate code at runtime and build and appropriate expression tree.Hystaspes: Logistics Management System: Logistics Management SystemKinect Experiments: This repository contains various code samples, proof-of-concepts and utilities for Kinect for Windows (v1.8 and v2)ppcs: Placement Project Version 1.0.0.0Reusable MVC Partial View with JQuery Datatables: Reusable jQuery DataTables integrated with in a Partial View of MVC 4.0 is a reusable control/view written entirely in C# and JQuery, my aim was to create a MVCShared Code Project Template for Visual Studio 2013 Update 2: This Project contains the source code for a Shared Project template for VS 2013 which extends the shareing of code to all Project types besides universal apps. Text word search: This project is a sample for searching words in a notepad or a word file through wpf platform. Trace And Watch: Trace And Watch is a Pintool developed to assist in finding 32-bit integer errors.Vtron Automatic tester screen parameters: VTRONWalli: Walli is an open source SalesForce integrated developer environment(IDE) application written in .NET.Windows Kirlian WiFi App: Illustrates the radio field generated by WiFiWOMPS - What's new On My PLEX Server: Purpose of this project is to send an user a weekly or daily email of all new content add to their Plex library.

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• Oracle Fusion Applications User Experience White Papers by Anna M. Wichansky

  - by JuergenKress

  The Applications User Experience group has created a series of white papers to better communicate the world-class user experience features of the Oracle Fusion Applications, and to describe the process we used to design them. These papers not only explain why the Oracle Fusion Applications User Experience is designed the way it is, but also the data collection, modeling, and testing efforts of our unique, user-focused design process, which contributed to its refinement. The documents we are sharing with product announcement are: Applications User Experience Research and Design Process White Paper New Oracle Fusion Applications: An End-User Experience Designed for Productivity Why Oracle Expects Productivity Gains with Fusion Applications Closing the Deal: the Oracle Fusion Customer Relationship Management User Experience Oracle Fusion Human Capital Management: Designed for a Productive Workforce Get It Done Fast, Get It Done Right: The Oracle Fusion Financials User Experience Oracle Fusion Applications User Experience Design Patterns: Productivity Realized Oracle Fusion Procurement: Changing the Way You Buy and Sell Putting the User into Oracle Fusion Applications User Assistance Read the full article here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. BlogTwitterLinkedInMixForumWiki Technorati Tags: User Experience,Design patterns,WebLogic Community,Oracle,OPN,Jürgen Kress

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• A Modern Marketing Marvel: Eloqua Experience 2013

  - by kristin.jellison

  Hey there, partners— You’d be hard pressed to find a more convincing example of modern marketing than the one that descended upon San Francisco last week. We’re talking about Eloqua Experience 2013, of course. It is remarkable that a marketing technology conference has become a case study in successful 21st-century marketing practices. Eloqua Experience 2013 (#EE13) was all about customer-focused, targeted messaging, multichannel content, analytics and real-time multiscreen engagement. It made for a busy, yet interactive experience for over 2,000 eager attendees. This year’s event brought together some of the world’s most innovative marketers for three days of immersive sessions covering marketing best practices, customer stories and deep-dive technical classes. With 70 breakout sessions, product announcements, and a special conversation with Vince Gilligan, creator and executive producer of “Breaking Bad,” #EE13 brought a lot of critical marketing news to light. Oracle’s goal: to make sure our partners stay updated. As you know, Eloqua joined Oracle in late 2012, further rounding out our Customer Experience applications platform. Eloqua is a marketing automation solution and marketing cloud centerpiece that partners can use to target the right buyers, easily execute campaigns, bring leads to sales and bring in high ROIs. The resources below will help you stay on top of the industry’s best practices for marketing, plus all the advantages Eloqua can bring to partners. Partner Opportunities and Strategy with Eloqua The latest Eloqua partner strategy. Interview with Oracle Eloqua GM Kevin Akeroyd on Eloqua Experience A short recap of 2013’s Experience. Eloqua Product Announcements John Stetic, VP of Products for Oracle Eloqua, highlights the top product news, including a new profiler app and the ability to integrate display advertising into multichannel campaigns. Eloqua Experience Highlight Reel See what all the bustle was about. Eloqua Experience Session Overviews A quick look at what the keynote and breakout sessions covered, with links to session content. Modern Marketing Essentials Library Tips, blueprints, and strategies for success based on the 5 Tenets of Modern Marketing. Over and out, Your OPN Marketing Allies

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• Windows Azure BidNow Sample &ndash; definitely worth a look

  - by Eric Nelson

  [Quicklink: download new Windows Azure sample from http://bit.ly/bidnowsample] On Mondays (17th May) in the  6 Weeks of Windows Azure training (Now full) Live Meeting call, Adrian showed BidNow as a sample application built for Windows Azure. I was aware of BidNow but had not found the time to take a look at it nor seems it running before. Adrian convinced me it was worth some a further look. In brief I like it :-) It is more than Hello World, but still easy enough to follow. Bid Now is an online auction site designed to demonstrate how you can build highly scalable consumer applications using Windows Azure. It is built using Visual Studio 2008, Windows Azure and uses Windows Azure Storage. Auctions are processed using Windows Azure Queues and Worker Roles. Authentication is provided via Live Id. Bid Now works with the Express versions of Visual Studio and above. There are extensive setup instructions for local and cloud deployment You can download from http://bit.ly/bidnowsample (http://code.msdn.microsoft.com/BidNowSample) and also check out David original blog post. Related Links UK based? Sign up to UK fans of Windows Azure on ning Check out the Microsoft UK Windows Azure Platform page for further links

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• Debugging Windows Service Timeout Error 1053

  - by Joe Mayo

  If you ever receive an Error 1053 for a timeout when starting a Windows Service you've written, the underlying problem might not have anything to do with a timeout.  Here's the error so you can compare it to what you're seeing: --------------------------- Services --------------------------- Windows could not start the Service1 service on Local Computer.   Error 1053: The service did not respond to the start or control request in a timely fashion. --------------------------- OK   --------------------------- Searching the Web for a solution to this error in your Windows Service will result in a lot of wasted time and advice that won't help.  Sometimes you might get lucky if your problem is exactly the same as someone else's, but this isn't always the case.  One of the solutions you'll see has to do with a known error on Windows Server 2003 that's fixed by a patch to the .NET Framework 1.1, which won't work.  As I write this blog post, I'm using the .NET Framework 4.0, which is a tad bit past that timeframe. Most likely, the basic problem is that your service is throwing an exception that you aren't handling.  To debug this, wrap your service initialization code in a try/catch block and log the exception, as shown below: using System; using System.Diagnostics; using System.ServiceProcess; namespace WindowsService { static class Program { static void Main() { try { ServiceBase[] ServicesToRun; ServicesToRun = new ServiceBase[] { new Service1() }; ServiceBase.Run(ServicesToRun); } catch (Exception ex) { EventLog.WriteEntry("Application", ex.ToString(), EventLogEntryType.Error); } } } } After you uninstall the old service, redeploy the service with modifications, and receive the same error message as above; look in the Event Viewer/Application logs.  You'll see what the real problem is, which is the underlying reason for the timeout. Joe

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• Where do I start in regards to making a Gnome/Unity Form Application

  - by JMK

  Ok so I am familiar with developing Form and Console applications on Windows using Visual Studio .Net with C#, but where do I start when it comes to Linux distro's like Ubuntu, is there an equivalent? How would one go about matching what they can do in a Windows environment with .Net and C# in a Linux environment without .Net coding in something like Java or C/C++? I am aware of Eclipse, does eclipse have a form designer or do you have to code the design of any Gnome/Unity forms manually? Can I use eclipse to write the Linux equivalent of a console application, that you just double click on to run? I also know about Mono, but the idea is that I want to learn how to develop software without using anything in the Microsoft stack and am not sure where to start. What is the standard language/framework used to develop these types of applications on Linux? As I become more proficient with Visual Studio, C# and .Net, it has struck me that without these Microsoft tools, I am nothing. I am only capable of developing for the Microsoft OS and this scares me. This isn't some anti Microsoft thing, Microsoft makes some incredible Software/Hardware/Operating Systems/IDE's, but it is generally a bad idea to put all of your eggs in one basket so if I want to learn how to develop Terminal and Gnome/Unity form applications where in the world do I start? I have used Linux on and off for years, but Windows has been my primary OS. However I have watched Linux get better and better and as much as I love Windows 7, I am dubious about Windows 8 (I for one will sorely miss my start menu)! Obviously MS aren't going anywhere anytime soon and I could spend the the next couple of decades developing for .Net without any issues but just because you can get away with something doesn't always mean it's a good idea. Thanks

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• New Oracle Solaris 11 Administration book

  - by glynn

  During the development of Oracle Solaris 11, one of the main goals was to modernize the operating system and remove some of the existing frustrations that our administrative audience had in deploying and using the platform within data centers around the world. That meant a comprehensive clean out of some existing technologies to provision the operating system (replacing Jumpstart with Automated Installer) and manage system software (replacing SVR4 with IPS packaging), consolidate the vast spectrum of networking configuration, and enhance the user environment to provide familiarity for those who were used to administering Linux environments among many other things. While some considered the changes to Oracle Solaris 11 as a negative change, most will be impressed at how far we've come - the deeper integration of key technologies, presented in a consolidated and consistent form. It is easier to administer the Oracle Solaris platform that ever before, and I have no doubt that administrators coming from other platforms will be hugely impressed with what they see, especially if they're judging based on past experiences of Solaris 8 and Solaris 9. In fact I'd go further to say that Oracle Solaris 11 is a more powerful, integrated and usable platform that most Linux platforms I've seen. But as with anything, there's always an initial learning curve to get through. We've provided a significant selection of learning materials out on the Oracle Solaris 11 pages on Oracle Technology Network and some great training and certification options. One more option is now available in the form of a book, the Oracle Solaris 11 System Administration The Complete Reference. This provides an exceptional reference to help administrators learn about Oracle Solaris 11, especially those who have come from the Linux platform. As is quoted in the first chapter of the guide: Linux users and developers will find in Oracle Solaris 11 a familiar and quickly productive working environment; we point out similarities and differences between the Linux and Solaris kernels and system administration tools, and describe how typical open source Web development tasks are accomplished in this OS. So I would encourage you to take a read of it and start seriously considering Oracle Solaris 11 to be a platform choice for your data center. Oracle Solaris 11 System Administration The Complete Reference - yours for only $32.50 (if you successfully use the promotion code - otherwise worth shopping around to pick up a good deal).

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• How not to suffer from ideologists when you're a pragmatic person?

  - by Lukas Eder

  My story: I'm a pragmatic person. Sometimes, the most simple solution to a problem to get the job done is the one that fits best for me, if its not an utter blasphemy and reproach to any design principles. Check out my answer to this question on stackoverflow. Simple. Works. Was accepted. Could be improved. Is clearly not perfect. And along comes this guy. He downvotes me, comments on the question how his answer is better, more accurate etc and calls me "plain wrong". Reminds me of this comic strip. :-) While on stackoverflow I can laugh at these things because those people are far away, in the real world I'm suffering from ideologies every now and then. Heck, I'm not creating a miracle piece of software, I need to keep that huge legacy thing running, and it's an adventure to me every day. I don't have the time or passion to beautify my code (or other people's code) to that extent. My question(s): How do you deal with ideologies / ideologists, when you're a pragmatic person? How do you deal with pragmatism / pragmatists, when you're an ideologic person? I'm interested in both point of views. Tell me your experience. But please, be fair, somewhat objective, and understand that you may NOT be entirely correct and your opinion is NOT the only true one... :-)

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• Cannot mount USB drive -- FSTAB error

  - by user107646

  Recently, one of my desktops seems to have developed a problem with the fstab and mounting USB drives. The specific error I receive is... Unable to mount TRAVELDRIVE Error mounting: mount exited with exit code 1: helper failed with: Unprivileged user can not mount NTFS block devices using the external FUSE library. Either mount the volume as root, or rebuild NTFS-3G with integrated FUSE support and make it setuid root. Please see more information at http://tuxera.com/community/ntfs-3g-faq/#unprivileged The contents of my fstab are... /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 #Entry for /dev/sdc1 : UUID=7e3431cd-522f-4e35-b286-4300fa702d4a / ext4 errors=remount-ro 0 1 #Entry for /dev/sda1 : UUID=60684D08684CDE82 /media/Archive ntfs-3g defaults,locale=en_US.UTF-8 0 0 #Entry for /dev/sdc5 : UUID=cd166221-4b1d-40f7-b9de-785208990587 none swap sw 0 0 /dev/sdd1 /media/sdd1 ntfs nls=iso8859-1,ro,users,umask=000,user 0 0 /dev/sdd5 /media/PS3 (fat32) vfat users,user 0 0 /dev/sdd5 /media/sdd5 vfat uid=m3talhead,users,user 0 0 I'm guessing its a problem with the duplicate /dev/sdd5 entries (?), but being the *nix noob I am, I'm not certain. What am I missing? Any assist is greatly appreciated!

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• Collision Detection for a 2D RPG

  - by PHMitrious

  First of all, I have done some research on this topic before asking, and I'm asking this question as a mean to get some opinions on this topic, so I don't make a decision only on my own, but taking into account other people's experience as well. I'm starting a 2D online RPG project. I am using SFML for graphics and input and I'm creating a basic game structure and all for the game, creating modules for each part of the game. Well, let me get to the point I just wanted to give you guys some context. I want to decide on how I'm going to work with collision detection. Well I'm kinda going to work on maps with a tile map divided in layers (as usual) and add an extra 2 layers - not exactly in the map - for objects. So I'll have collisions between objects and agents (players - npcs - monsters - spells etc) and agents and tiles. The seconds one can be easily solved the first one need a little bit of work. I considered both creating a basic collision test engine using polygons and a quadtree to diminish tests since I'm going to be working with big maps with lots of objects - creating both a physical and graphical world representation. And I also considered using a physics engine like Box2D for collision tests. I think the first approach would take more work on my part but the second one would have the overhead of using a whole physics engine for just collision detection and no physics. What do you guys think ?

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• JUnit Testing in Multithread Application

  - by e2bady

  This is a problem me and my team faces in almost all of the projects. Testing certain parts of the application with JUnit is not easy and you need to start early and to stick to it, but that's not the question I'm asking. The actual problem is that with n-Threads, locking, possible exceptions within the threads and shared objects the task of testing is not as simple as testing the class, but testing them under endless possible situations within threading. To be more precise, let me tell you about the design of one of our applications: When a user makes a request several threads are started that each analyse a part of the data to complete the analysis, these threads run a certain time depending on the size of the chunk of data (which are endless and of uncertain quality) to analyse, or they may fail if the data was insufficient/lacking quality. After each completed its analysis they call upon a handler which decides after each thread terminates if the collected analysis-data is sufficient to deliver an answer to the request. All of these analysers share certain parts of the applications (some parts because the instances are very big and only a certain number can be loaded into memory and those instances are reusable, some parts because they have a standing connection, where connecting takes time, ex.gr. sql connections) so locking is very common (done with reentrant-locks). While the applications runs very efficient and fast, it's not very easy to test it under real-world conditions. What we do right now is test each class and it's predefined conditions, but there are no automated tests for interlocking and synchronization, which in my opionion is not very good for quality insurances. Given this example how would you handle testing the threading, interlocking and synchronization?

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• Back in Brazil! See you at JavaOne LAD this week

  - by terrencebarr

  It’s great to be back in Sao Paulo. I’m looking forward to a another buzzing JavaOne LAD conference and the energy of the Latin American Java community! And, of course, catching up with Brazilian friends over some serious Caipirinhas I’m part of the Technical Keynote on Tuesday, and doing three technical sessions: Harnessing the Explosion of Advanced Microcontrollers with Embedded Java, Dec 5, 11:15 A New Platform for Ubiquitous Computing: Oracle Java ME Embedded, Dec 5, 17:30 Java ME Embedded Profile 8—for an Embedded World with Increasing Demands, Dec 6, 11:15 In fact, I think I will morph the last session into a more wide sweeping introduction into Java ME 8 (of which the Java ME Embedded Profile 8 is a component) – there is so much new and cool stuff in the pipe that just talking about Java ME Embedded Profile doesn’t do it justice.   Plus, I’ll be showing some small embedded Java toys at the demo booth (in the Exhibition Pavilion).   Hope to see you there!   Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Java ME 8", "JavaOne LAD", Java Embedded, Java ME

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• geomipmapping using displacement mapping (and glVertexAttribDivisor)

  - by Will

  I wake up with a clear vision, but sadly my laptop card doesn't do displacement mapping nor glVertexAttribDivisor so I can't test it out; I'm left sharing here: With geomipmapping, the grid at any factor is transposable - if you pass in an offset - say as a uniform - you can reuse the same vertex and index array again and again. If you also pass in the offset into the heightmap as a uniform, the vertex shader can do displacement mapping. If the displacement map is mipmapped, you get the advantages of trilinear filtering for distant maps. And, if the scenery is closer, rather than exposing that the you have a world made out of quads, you can use your transposable grid vertex array and indices to do vertex-shader interpolation (fancy splines) to do super-smooth infinite zoom? So I have some questions: does it work? In theory, in practice? does anyone do it? Does this technique have a name? Papers, demos, anything I can look at? does glVertexAttribDivisor mean that you can have a single glMultiDrawElementsEXT or similar approach to draw all your terrain tiles in one call rather than setting up the uniforms and emitting each tile? Would this offer any noticeable gains? does a heightmap that is GL_LUMINANCE take just one byte per pixel(=vertex)? (On mainstream cards, obviously. Does storage vary in practice?) Does going to the effort of reusing the same vertices and indices mean that you can basically fill the GPU RAM with heightmap and not a lot else, giving you either bigger landscapes or more detailed landscapes/meshes for the same bang? is mipmapping the displacement map going to work? On future cards? Is it going to introduce unsurmountable inaccuracies if it is enabled?

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• Calculating a child Position, Rotation and Scale values?

  - by Sergio Plascencia

  I am making my own game editor(just for fun) anyway I have problem that I had several days trying to resolve but I have been unsuccessful. Here goes... I have an object "A": Position: (3,3,3), Rotation: (45,10,0), Scale(1,2,2.5) And an object "B": Position: (1,1,1), Rotation: (10,34,18), Scale(1.5,2,1) I now make a parent/child relationship. "B" is a child of "A": A |--B When I do the relationship I need to re-calculate the Child("B") Position, Rotation and Scale such that it maintains its current position, rotation and scale(Location in world). So for child position "B" it would now be (-2, -2, -2) since now "A" it is center and (-2, -2, -2) will keep the object in its same position. I think I got the Position and scale figure out, but rotation I cant. So I was trying to figure out what to do and what I did is opened Unity and run the same example and I did noticed that when making an abject a child object the child object did not moved at all but had its Position, Rotation and Scale values changed(Related to the parent). For example: Unity (Parent Object "A"): Position: (0,0,0) Rotation: (45,10,0) Scale: (1,1,1) Unity (Child Object "B"): Position: (0,0,0) Rotation: (0,0,0) Scale: (1,1,1) When making it a parent child relation("B" is a child of "A") the child object("B") in its Rotation values now has: X: -44.13605 Y: -14.00195 Z: 9.851074 If I plug the same values to my editor(To the child "B" rotation X, Y, Z values) the object does not move at all. So I basically need to know how did Unity arrive at those rotation values for the child(What are the calculations?). If you can help and put all the equations for the Position, Rotation or Scale then I can double check I am doing it correctly but with the Rotation I really need help. Thanks!

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• The Differences between MAC Address and Network Layer Address

  A Mac address is a fixed number associated with a NICs onboard memory. It is initially assigned at the factory. The MAC address is broken up into 2 parts. The first part is the Block id which is six digit sequences that is unique to each vender. The second section is the device id which is created and assigned by the manufacture. A Network layer address is different because there format based on the type of protocol and network used. Also, there unique id is based on a hierarchal addressing theme on subsets of data  and narrowing it down. Just like in an address you can narrow down your house, for example: Florida, Boca Raton, 33428, SW 53th street states that you live in Florida. You also live in the area located in Florida called Boca Raton and you are also in the area of 33428 which is located in Boca Raton. Finally you live on SW 8th street which is in the area of 33428 which is located in Boca Raton which is also located in Florida.

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• A new mission statement for my school's algorithms class

  - by Eric Fode

  The teacher at Eastern Washington University that is now teaching the algorithms course is new to eastern and as a result the course has changed drastically mostly in the right direction. That being said I feel that the class could use a more specific, and industry oriented (since that is where most students will go, though suggestions for an academia oriented class are also welcome) direction, having only worked in industry for 2 years I would like the community's (a wider and much more collectively experienced and in the end plausibly more credible) opinion on the quality of this as a statement for the purpose an algorithms class, and if I am completely off target your suggestion for the purpose of a required Jr. level Algorithms class that is standalone (so no other classes focusing specifically on algorithms are required). The statement is as follows: The purpose of the algorithms class is to do three things: Primarily, to teach how to learn, do basic analysis, and implement a given algorithm found outside of the class. Secondly, to teach the student how to model a problem in their mind so that they can find a an existing algorithm or have a direction to start the development of a new algorithm. Third, to overview a variety of algorithms that exist and to deeply understand and analyze one algorithm in each of the basic algorithmic design strategies: Divide and Conquer, Reduce and Conquer, Transform and Conquer, Greedy, Brute Force, Iterative Improvement and Dynamic Programming. The Question in short is: do you agree with this statement of the purpose of an algorithms course, so that it would be useful in the real world, if not what would you suggest?

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