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  • Great Blog Comments

    - by Paul Sorensen
    Just a quick note to let you know that in the interest of keeping the most useful content available here on the Oracle Certification Blog, we do moderate the comments. We welcome (and encourage dialog, questions, comments, etc) here on the topics at hand. We'll never 'censor' out a comment just because we don't like it - in fact, this is how we often learn ways in which we can do better. But of course we will filter out the typical list like anyone else: crude/offensive remarks, foul language, reference to illegal activity, etc. We will also often redirect any customer-service type inquiries to [email protected] where they can best be handled.Also, if you have a question of a general nature, please research it on the Oracle Certification website first. We often won't respond to questions asking such as "tell me how to get 11g ocp", as we've already made sure that you have that kind of information available. Now if we've inadvertently 'hidden' something on our site (gulp), then fair enough - please let us know that you're having a hard time finding it and we'll be sure to try and "unbury it" ;-)Additionally, you may have more of an 'opinion' type question, such as "should I do 'x' certification or 'y' certification." For these, we highly recommend checking on the Oracle Technology Network (OTN) Certification Forum, where you can engage in peer-to-peer discussions, share techniques, advice and best practices with others in the field.In the meantime, please continue to share your thoughts, ideas, opinions, tech tips etc - we look forward to seeing them and passing them wherever we can!QUICK LINKS:Oracle Certification WebsiteEmail - Customer ServiceOracle Technology Network (OTN) Certification Forum

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  • Sitemap structure for network of subdomains

    - by HaCos
    I am working on a project that's a network of 2 domains (domain.gr & domain.com.cy) of subdomains similar to Hubpages [each user gets a profile under a different subdomain & there is a personal blog for that user as well] and I think there is something wrong with our sitemap submission. Sometimes it takes weeks in order a new profiles to get indexed. We make use of one Webmasters account in order to manage all network and we don't want to create different accounts for each subdomain since there are more than 1000 already. According to this post http://goo.gl/KjMCjN, I end up on a structure of 5 sitemaps with the following structure : 1st sitemap will be for indexing the others. 2nd sitemap for all users profile under the domain.gr 3nd sitemap for all users profile under the domain.com.cy 4th sitemap for all posts under the *.domain.gr - news sitemap http://goo.gl/8A8S9f 5th sitemap for all posts under the *.domain.com.cy - news sitemap again Now my questions: Should we create news sitemaps or just list all post in 2nd & 3rd sitemap? Does links ordering has anything to do? Eg: Most recent user created be first in sitemap or doesn't make any different and we just need to make sure that lastmod date is correct? Does anyone guess how Hubpages submit their sitemap in Webmasters so maybe we could follow there way? Any alternative or better way to index this kind of schema? PS: Our network is multi language - Greek & English are available. We make use of hreflang tags on the head of each page to separate country target of each version.

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  • Iva&rsquo;s internship story

    - by anca.rosu
    Hello, my name is Iva and I am a member of the Internship program at Oracle Czech. When I joined Oracle, I initially worked as an Alliances and Channel Marketing Assistant at Oracle Czech Republic, but most recently, I have been working in the Demand Generation Team. I am a student of the Economics and Management Faculty at Czech University of Life Sciences in Prague, specializing in Marketing, Business and Administration. I have recently passed my Bachelor exams. I received the information about Oracle’s Internship opportunity from a friend. I joined Oracle in September 2008 and worked as an Alliances and Channel Marketing Assistant until May 2009. Here I was responsible for the Open Market Model (OMM) and at the same time I was covering communication with Partners, Oracle Events and Team Buildings as well as creating Partner Databases and Reports. At the moment, I support our Demand Generation Team to execute Direct Marketing campaigns in Czech Republic, Slovak Republic and Hungary. In addition to this, I help with Reporting and Contact Data Management for the whole of the European Enlargement (EE) and Commonwealth of Independent States (CIS) regions. I enjoy my job and I appreciate the experience. Every day is interesting, because every day I learn something new. I am very happy that I was presented with an opportunity to work at Oracle and cooperate with friendly people in a multicultural environment. Oracle gives me the chance to develop my skills and start building my career. I am able to attend interesting training classes, improve my language skills and enjoy sporting activities, such as squash, swimming and aerobics, at the same time. If you dream of working in an international company and you would like to join a very dynamic industry, I really can recommend Oracle without a doubt, even if you have no IT background! If you have any questions related to this article feel free to contact  [email protected].  You can find our job opportunities via http://campus.oracle.com   Technorati Tags: Internship program,Oracle Czech,Economics,Management Faculty,Czech University of Life Sciences in Prague,Demand Generation Team

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  • Regarding sprite design and resolution for tablets and phones

    - by Dimitris P.
    I am about to start working on a game for android devices, in my spare time, to get familiar with android development. I'm more interested in using the best practices possible than getting a quick result, and that is why I need some guidance regarding graphics. I think the game is going to be fully sprite based. Everything is going to be in .bmp form, or something similar, and my question is: Should I design the sprites in a small resolution (ie for phone screens) and scale them up to fit into larger screens (tablet screens), should I do it vice-versa or should I consider a completely different approach? Would designing a different set of sprites for each of the most used resolution settings be worth it or are there simpler solutions to the problem with fewer drawbacks than the ones I mentioned above? (If I follow the first approach, for example, the larger the screen the worse the graphics will get, since every pixel of the original drawing will cover several pixels on the screen). Is there a standard approach for dealing with this kind of problems? If you need me to be more detailed or more clear about something I mentioned (or forgot to) please don't hesitate to ask. Also, excuse me for any inaccurate use of the English language. Thank you in advance for your input.

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  • CodePlex Daily Summary for Monday, January 31, 2011

    CodePlex Daily Summary for Monday, January 31, 2011Popular ReleasesMVC Controls Toolkit: Mvc Controls Toolkit 0.8: Fixed the following bugs: *Variable name error in the jvascript file that prevented the use of the deleted item template of the Datagrid *Now after the changes applied to an item of the DataGrid are cancelled all input fields are reset to the very initial value they had. *Other minor bugs. Added: *This version is available both for MVC2, and MVC 3. The MVC 3 version has a release number of 0.85. This way one can install both version. *Client Validation support has been added to all control...Office Web.UI: Beta preview (Source): This is the first Beta. it includes full source code and all available controls. Some designers are not ready, and some features are not finalized allready (missing properties, draft styles) ThanksASP.net Ribbon: Version 2.2: This release brings some new controls (part of Office Web.UI). A few bugs are fixed and it includes the "auto resize" feature as you resize the window. (It can cause an infinite loop when the window is too reduced, it's why this release is not marked as "stable"). I will release more versions 2.3, 2.4... until V3 which will be the official launch of Office Web.UI. Both products will evolve at the same speed. Thanks.Barcode Rendering Framework: 2.1.1.0: Final release for VS2008 Finally fixed bugs with code 128 symbology.HERB.IQ: HERB.IQ.UPGRADE.0.5.3.exe: HERB.IQ.UPGRADE.0.5.3.exexUnit.net - Unit Testing for .NET: xUnit.net 1.7: xUnit.net release 1.7Build #1540 Important notes for Resharper users: Resharper support has been moved to the xUnit.net Contrib project. Important note for TestDriven.net users: If you are having issues running xUnit.net tests in TestDriven.net, especially on 64-bit Windows, we strongly recommend you upgrade to TD.NET version 3.0 or later. This release adds the following new features: Added support for ASP.NET MVC 3 Added Assert.Equal(double expected, double actual, int precision) Ad...DoddleReport - Automatic HTML/Excel/PDF Reporting: DoddleReport 1.0: DoddleReport will add automatic tabular-based reporting (HTML/PDF/Excel/etc) for any LINQ Query, IEnumerable, DataTable or SharePoint List For SharePoint integration please click Here PDF Reporting has been placed into a separate assembly because it requies AbcPdf http://www.websupergoo.com/download.htmSpark View Engine: Spark v1.5: Release Notes There have been a lot of minor changes going on since version 1.1, but most important to note are the major changes which include: Support for HTML5 "section" tag. Spark has now renamed its own section tag to "segment" instead to avoid clashes. You can still use "section" in a Spark sense for legacy support by specifying ParseSectionAsSegment = true if needed while you transition Bindings - this is a massive feature that further simplifies your views by giving you a powerful ...Marr DataMapper: Marr DataMapper 1.0.0 beta: First release.WPF Application Framework (WAF): WPF Application Framework (WAF) 2.0.0.3: Version: 2.0.0.3 (Milestone 3): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Remark The sample applications are using Microsoft’s IoC container MEF. However, the WPF Application Framework (WAF) doesn’t force you to use the same IoC container in your application. You can use ...Rawr: Rawr 4.0.17 Beta: Rawr is now web-based. The link to use Rawr4 is: http://elitistjerks.com/rawr.phpThis is the Cataclysm Beta Release. More details can be found at the following link http://rawr.codeplex.com/Thread/View.aspx?ThreadId=237262 and on the Version Notes page: http://rawr.codeplex.com/wikipage?title=VersionNotes As of the 4.0.16 release, you can now also begin using the new Downloadable WPF version of Rawr!This is a pre-alpha release of the WPF version, there are likely to be a lot of issues. If you...Squiggle - A Free open source LAN Messenger: Squiggle 2.5 Beta: In this release following are the new features: Localization: Support for Arabic, French, German and Chinese (Simplified) Bridge: Connect two Squiggle nets across the WAN or different subnets Aliases: Special codes with special meaning can be embedded in message like (version),(datetime),(time),(date),(you),(me) Commands: cls, /exit, /offline, /online, /busy, /away, /main Sound notifications: Get audio alerts on contact online, message received, buzz Broadcast for group: You can ri...VivoSocial: VivoSocial 7.4.2: Version 7.4.2 of VivoSocial has been released. If you experienced any issues with the previous version, please update your modules to the 7.4.2 release and see if they persist. If you have any questions about this release, please post them in our Support forums. If you are experiencing a bug or would like to request a new feature, please submit it to our issue tracker. Web Controls * Updated Business Objects and added a new SQL Data Provider File. Groups * Fixed a security issue whe...PHP Manager for IIS: PHP Manager 1.1.1 for IIS 7: This is a minor release of PHP Manager for IIS 7. It contains all the functionality available in 56962 plus several bug fixes (see change list for more details). Also, this release includes Russian language support. SHA1 codes for the downloads are: PHPManagerForIIS-1.1.0-x86.msi - 6570B4A8AC8B5B776171C2BA0572C190F0900DE2 PHPManagerForIIS-1.1.0-x64.msi - 12EDE004EFEE57282EF11A8BAD1DC1ADFD66A654mojoPortal: 2.3.6.1: see release notes on mojoportal.com http://www.mojoportal.com/mojoportal-2361-released.aspx Note that we have separate deployment packages for .NET 3.5 and .NET 4.0 The deployment package downloads on this page are pre-compiled and ready for production deployment, they contain no C# source code. To download the source code see the Source Code Tab I recommend getting the latest source code using TortoiseHG, you can get the source code corresponding to this release here.Parallel Programming with Microsoft Visual C++: Drop 6 - Chapters 4 and 5: This is Drop 6. It includes: Drafts of the Preface, Introduction, Chapters 2-7, Appendix B & C and the glossary Sample code for chapters 2-7 and Appendix A & B. The new material we'd like feedback on is: Chapter 4 - Parallel Aggregation Chapter 5 - Futures The source code requires Visual Studio 2010 in order to run. There is a known bug in the A-Dash sample when the user attempts to cancel a parallel calculation. We are working to fix this.NodeXL: Network Overview, Discovery and Exploration for Excel: NodeXL Excel Template, version 1.0.1.160: The NodeXL Excel template displays a network graph using edge and vertex lists stored in an Excel 2007 or Excel 2010 workbook. What's NewThis release improves NodeXL's Twitter and Pajek features. See the Complete NodeXL Release History for details. Installation StepsFollow these steps to install and use the template: Download the Zip file. Unzip it into any folder. Use WinZip or a similar program, or just right-click the Zip file in Windows Explorer and select "Extract All." Close Ex...Kooboo CMS: Kooboo CMS 3.0 CTP: Files in this downloadkooboo_CMS.zip: The kooboo application files Content_DBProvider.zip: Additional content database implementation of MSSQL, RavenDB and SQLCE. Default is XML based database. To use them, copy the related dlls into web root bin folder and remove old content provider dlls. Content provider has the name like "Kooboo.CMS.Content.Persistence.SQLServer.dll" View_Engines.zip: Supports of Razor, webform and NVelocity view engine. Copy the dlls into web root bin folder to enable...UOB & ME: UOB ME 2.6: UOB ME 2.6????: ???? V1.0: ???? V1.0 ??New ProjectsAuto Complete Control for ASP.NET: Autocomplete Control is a fully functional ASP.NET control for word suggestions and autocomplete. We had been using Ajax Control Toolkit AutoComplete Extender in our projects before, but we have needed some extra features and functionalities.Cours ESIEE: MAJ des cours ESIEE depuis la plateforme Icampus et autres documentsEngineering World Expenses: Demo expenses application for Engineering World 2011Entity Framework / Linq to Sql Poco Code Generator: Poco Orm data access layer (Dto) code generator for Entity Framework and Linq to Sql. Customizable code generation via simple templating system. Utilizes Managed Extensibility Framework (MEF) in order for application parts to dynamically composed and plug-able.linqish.py: Python module for manipulating iterables. An implementation of the .Net Framework's Linq to Objects for Python.Machinekey setter: This code sample is Windows Azure SDK 1.3 custom plugin. This sample do working at set custom key to machinekey of web.config file in your WebRole.MapReduce.NET: MapReduce.NET intends to implement the original paper proposed by Google on MapReduce.Marr DataMapper: Marr DataMapper provides a fast and easy to use wrapper around ADO.NET that enables you to focus more on your data access queries without having to write plumbing code. Load one-to-one, one-to-many, and hierarchical entity models with ease. No special base class required.Orchard Silverlight: Orchard module enabling embedding Silverlight applications and creating Silverlight-based content.RouteMagic: Library of useful routing helpers and classes.Smart Skelta Utilites: Smart Skelta Utilies will provide utilties like Visual Studio 2008 Skelta Starter Kit(Project Templates and Project Item Templates),Code Snippets for Skelta Components,Skleta Attachment Extracter Web based Logger,Skelta Server utility and others for skelta based development.Solfix: Solfix is a programming language tbat is work-in-progress, but it has a lot of functionality! You can make applications for console to windows applications. The main point of Solfix is to make coding easier and less time than before.SQLite Manager: A minimal manage for sqlite databases.State Search: StateSearch provides state search algoritms such as A*, IDA*, BestFirst, etc to solve problems such as puzzles and/or path searchingTable Check Custom Field Type: SharePoint Custom Field Type for displaying a list of values with checkboxes and people editors.testsgb: testWindows Phone 7 Extension Framework: An extension method framework for Windows Phone 7 to make your code more fluent and adding a lot of common functions you don't need to reproduce.

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  • Highly SEO optimised forum posts

    - by Tom Gullen
    Given the following forum post: Basics of how internals of Construct work I've used GameMaker in the past. And I know some C++ and have used a few 3d engines with it. I have also looked at Unity, though I didn't get too much into it. So I know my way around programming etc... My question is, how does construct work internally? I know it allows python scripting, which itself is "technically" interpreted, though python is pretty fast as far as being interpreted goes. But what about the rest? Is the executable that gets cre... The forum software will take the first 150 chars of the first post as the page meta description, and the title will be the thread title. All ok. So in Google it will appear as: Basics of how internals of Construct work I've used GameMaker in the past. And I know some C++ and have used a few 3d engines with it. I have also looked at Unity, though I didn't get too much... http://www.domain.com/forum/basics-of-how-internals-of-construct-work.html Now the problem is (not so much with this thread, but other ones) is the first 150 chars don't always create the best meta description. Is it worth my time to cherry pick threads and manually set their description/title tags so they read like: Internal workings of Construct 2 Events aren't converted to any other language. The runtime is a standalone compiled EXE application, which is optimised and actually very fast. Your events... http://www.domain.com/forum/basics-of-how-internals-of-construct-work.html The H1 on the page is still the original title, but we have overridden the title and description to look more friendly on search results. Is this advantageous forgetting the obvious time cost?

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  • Turn-based games [closed]

    - by Blue
    I've been looking for tutorials on turn-based games. I found an incomplete tutorial series by InsugentX about turn-based games. I haven't looked through it, but since it's incomplete, I worry that I won't be able to finish the scripts. I'm looking for tutorials or some good tips or advice to create turn-based games(similar to Worms). Recently I finished watching the WalkerBoys' tutorials so I am familiar with code. Where can I find some info and/or tutorials on creating Turn-based games? I'd prefer it to be video format. How can I create turn-based games (not the entire thing, only the set-up) or a turn-based event like in Worms? To explain more, How do I create 2 parties(1st player, 2nd player) exchanging turns(turn-based games and/or hotseat). While parties have characters similar to Worms(having more than 1 character within each party)? Do I use an array, an enum? I don't have any experience in turn-based games, so I would like to know how to actually make turn-based games. I can't find any reference to help me with construction of a turn-based game code similar to Worms in a programming language I can understand.

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  • Should I give the answer to a failed interview coding exercise?

    - by GlenH7
    We had a senior level interview candidate fail a nuance of the FizzBuzz question*. I mean, really, utterly, completely, failed the question - not even close. I even coached him through to thinking about using a loop and that 3 and 5 were really worth considering as special cases. He blew it. Just for QA purposes, I gave the same exact question to three teammates; gave them 5 minutes; and then came back to collect their pseudo-code. All of them nailed it and hadn't seen the question before. Two asked what the trick was... On a different logic exercise, the candidate showed some understanding of some of the features available within the language he chose to use (C#). So it's not as if he had never written a line of code. But his logic still stunk. My question is whether or not I should have given him the answer to the logic questions. He knew he blew them, and acknowledged it later in the interview. On the other hand, he never asked for the answer or what I was expecting to see. I know coding exercises can be used to set candidates up for failure (again, see second link from above). And I really tried to help him home in on answering the core of the question. But this was a senior level candidate and Fizz-Buzz is, frankly, ridiculously easy even with accounting for interview jitters. I felt like I should have shown him a way of solving the problem so that he could at least learn from the experience. But again, he didn't ask. What's the right way to handle that situation? *Okay, that's not the link to the actual FizzBuzz question, but it is a good P.SE discussion around FizzBuzz and links to the various aspects of it.

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  • save data in the database to xml in c [closed]

    - by Jayanth N
    I have some data in the database. I want those data in database to be stored as an xml file. I'm using postgresql 9.1 for database, for xml processing I'm using libxml (http://xmlsoft.org/). I'm writing the code in C language. Please help me. Detailed explanation: I have a client, which sends me a xml file. Server receives the xml file, parses the xml file and stores it in the db. From db i want to send the details in the form of an xml to the client. client: <employee> <name>glen</name> <telephone>123456789</telephone> </employee> <employee> <name>gwen</name> <telephone>123456789</telephone> </employee> server parses this xml file as displayed below: name : glen telephone:123456789 name : gwen telephone: 123456789 and saves it in a database(postgresql9.1) if the client requests for details of the employees, i've to send it in xml form from database.I don't know how to do it can u help me out.

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  • Preview Chitika Premium Ads On Your Website Quickly

    - by Gopinath
    Google AdSense is an excellent option for publishers like us to monetize traffic. As Google AdSense allow only 3 ad units per page, we have good amount of space left empty on the blog. Why not we use this empty space to earn some revenue(make sure that you are not annoying your visitors with too many ads)? On Tech Dreams today we started experimenting with Chitika Premium Ads to displays advertisements for visitors landing on us through search engines. Chitika Premium Ads are displayed only to US visitors who finds our pages through search engines. Visitors from outside USA does not see these ads anywhere on our site. We being in India, how to preview the Chitika ads on our site? To preview Chitika ads add #chitikatest at the end of the url. For example to preview the ads on Tech Dreams I use the url http://techdreams.org/#chitikatest The above url displays default list of ads Chitika displays. But if you want to see preview of ads for a specific keyword you can append it at the end of the url. Here is another example http://www.techdreams.org/#chitikatest=ipad   Do You Know What The Word “Chitika” Means? What does Chitika mean? When Chitika co-founders, Venkat Kolluri and Alden DoRosario left Lycos in 2003 to start their own company, they sought a name that would suggest the speed with which its customers would be able to put up ads on their Web sites. Chitika, which means “snap of the fingers” in Telugu (a South Indian language), captured this sentiment and Chitika Inc. was born (via) This article titled,Preview Chitika Premium Ads On Your Website Quickly, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • Unable to install Ubuntu 12.04.1 on Virtualbox on Windows 7 Host

    - by arcube
    I would like to install Ubuntu 12.04.1 in a virtual box on windows 7 host however I get a black screen after selecting to install Ubuntu i.e. right after choosing English language I have tried the 32bit and 64bit version desktop version, have also read thru some guides e.g. http://www.psychocats.net/ubuntu/virtualbox but I could not find any solution to fix this problem. BTW I have Ubuntu installed using Virtual PC (not running at the same time), also I have mac OS (mountain lion) installed using Virtual Box so I do not think it is a problem with the virtual box or windows 7 host. My VM configuration is with 1 core and 1 GB of ram using 20GB VDI; rest is default config. My hardware is Core i7 3770k / Asus P8Z77-V Deluxe / GSkill 32GB which I believe should be more than sufficient to run another VM. I have moved my user profile from SSD to HDD via junction however IMHO it should not matter. Has anyone else come across this problem and found a solution? Any help/thoughts on how to solve this would be very much appreciated.

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  • Switch vs Polymorphism when dealing with model and view

    - by Raphael Oliveira
    I can't figure out a better solution to my problem. I have a view controller that presents a list of elements. Those elements are models that can be an instance of B, C, D, etc and inherit from A. So in that view controller, each item should go to a different screen of the application and pass some data when the user select one of them. The two alternatives that comes to my mind are (please ignore the syntax, it is not a specific language) 1) switch (I know that sucks) //inside the view controller void onClickItem(int index) { A a = items.get(index); switch(a.type) { case b: B b = (B)a; go to screen X; x.v1 = b.v1; // fill X with b data x.v2 = b.v2; case c: go to screen Y; etc... } } 2) polymorphism //inside the view controller void onClickItem(int index) { A a = items.get(index); Screen s = new (a.getDestinationScreen()); //ignore the syntax s.v1 = a.v1; // fill s with information about A s.v2 = a.v2; show(s); } //inside B Class getDestinationScreen(void) { return Class(X); } //inside C Class getDestinationScreen(void) { return Class(Y); } My problem with solution 2 is that since B, C, D, etc are models, they shouldn't know about view related stuff. Or should they in that case?

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  • Should I be using Lua for game logic on mobile devices?

    - by Rob Ashton
    As above really, I'm writing an android based game in my spare time (android because it's free and I've no real aspirations to do anything commercial). The game logic comes from a very typical component based model whereby entities exist and have components attached to them and messages are sent to and fro in order to make things happen. Obviously the layer for actually performing that is thin, and if I were to write an iPhone version of this app, I'd have to re-write the renderer and core driver (of this component based system) in Objective C. The entities are just flat files determining the names of the components to be added, and the components themselves are simple, single-purpose objects containing the logic for the entity. Now, if I write all the logic for those components in Java, then I'd have to re-write them on Objective C if I decided to do an iPhone port. As the bulk of the application logic is contained within these components, they would, in an ideal world, be written in some platform-agnostic language/script/DSL which could then just be loaded into the app on whatever platform. I've been led to believe however that this is not an ideal world though, and that Lua performance etc on mobile devices still isn't up to scratch, that the overhead is too much and that I'd run into troubles later if I went down that route? Is this actually the case? Obviously this is just a hypothetical question, I'm happy writing them all in Java as it's simple and easy get things off the ground, but say I actually enjoy making this game (unlikely, given how much I'm currently disliking having to deal with all those different mobile devices) and I wanted to make a commercially viable game - would I use Lua or would I just take the hit when it came to porting and just re-write all the code?

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  • What's the relationship between meta-circular interpreters, virtual machines and increased performance?

    - by Gomi
    I've read about meta-circular interpreters on the web (including SICP) and I've looked into the code of some implementations (such as PyPy and Narcissus). I've read quite a bit about two languages which made great use of metacircular evaluation, Lisp and Smalltalk. As far as I understood Lisp was the first self-hosting compiler and Smalltalk had the first "true" JIT implementation. One thing I've not fully understood is how can those interpreters/compilers achieve so good performance or, in other words, why is PyPy faster than CPython? Is it because of reflection? And also, my Smalltalk research led me to believe that there's a relationship between JIT, virtual machines and reflection. Virtual Machines such as the JVM and CLR allow a great deal of type introspection and I believe they make great use it in Just-in-Time (and AOT, I suppose?) compilation. But as far as I know, Virtual Machines are kind of like CPUs, in that they have a basic instruction set. Are Virtual Machines efficient because they include type and reference information, which would allow language-agnostic reflection? I ask this because many both interpreted and compiled languages are now using bytecode as a target (LLVM, Parrot, YARV, CPython) and traditional VMs like JVM and CLR have gained incredible boosts in performance. I've been told that it's about JIT, but as far as I know JIT is nothing new since Smalltalk and Sun's own Self have been doing it before Java. I don't remember VMs performing particularly well in the past, there weren't many non-academic ones outside of JVM and .NET and their performance was definitely not as good as it is now (I wish I could source this claim but I speak from personal experience). Then all of a sudden, in the late 2000s something changed and a lot of VMs started to pop up even for established languages, and with very good performance. Was something discovered about the JIT implementation that allowed pretty much every modern VM to skyrocket in performance? A paper or a book maybe?

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  • C++ and function pointers assessment: lack of inspiration

    - by OlivierDofus
    I've got an assessment to give to my students. It's about C++ and function pointers. Their skill is middle: it the first year of a programming school after bachelor. To give you something precise, here's a sample of a solution of one of 3 exercices they had to do in 30 minutes (the question was: "here's a version of a code that could be written with function pointers, write down the same thing but with function pointers"): typedef void (*fcPtr) (istream &); fcPtr ArrayFct [] = { Delete , Insert, Swap, Move }; void HandleCmd (const string && Cmd) { string AvalaibleCommands ("DISM"); string::size_type Pos; istringstream Flux (Cmd); char CodeOp; Flux >> CodeOp; Pos = AvalaibleCommands.find (toupper (CodeOp)); if (Pos != string::npos) { ArrayFct [Pos](Flux); } } Any idea where I could find some inspiration? Some of the students have understood the principles, even though it's very hard for them to write C++ code. I know them, I know they're clever, and I'm pretty sure they should be very good project managers. So, writing C++ code is not that important after all. Understanding is the most important part (IMHO). I'm wondering about maybe break the habits, and give half of the questions about the principle, or even better, give some sample in other language and ask them why it's better to use function pointers instead of classical programming (usually a big switch case). Any idea where I could look? Find some inspiration?

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  • Can One Get a Solid Programming Foundation Without Going To College/University?

    - by Daniel
    First, I have already searched the site and read all the previous "self-taught vs. college" topics. The majority of the answers defended that going to college was the best choice, for two main reasons: Going to college gives you the paper, which is essential to landing jobs, especially in tough economic times. Going to college gives you a solid programming base, teaching you the principles that will be essential regardless of the language/path you take after. Here comes my question: I am not worried about reason 1 at all, because I already have my own company (I build websites/ do affiliate marketing) and a stable financial situation, so I am pretty sure I won't need to look around for a job. I am worried about reason 2 though. That is, I want to make sure I'll have as solid a programming foundation as anyone else out there, and I am wondering if that is possible with self-learning. Suppose I take my time to study the very basics, like discrete maths, algorithm design, programming logic, computer architecture, Assembly, C programming, databases and data structures - mostly using books,online resources and lots of coding. Say I spend 1-2 years covering those basics. Do you think my foundation would be solid, or still lack in comparison to someone who went to college?

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  • What is Java used for these days?

    - by Barry Brown
    Java is fifteen years old. It started life as an alternative to C++ with a comprehensive standard library. Riding on the coattails of the Internet boom, it was popular for writing web applets. Its supposed portability was touted as a way to write desktop apps that would run on any platform. Now it's 2010. Applets are long gone. Desktop apps are giving way to web and mobile apps. Scripting languages are very popular, as is Flash, especially among web-centric developers. People have been chanting "Java's death is near" for several years. Yet a quick job search shows that Java is still a desired skill among programmers. So what is Java used for these days? What kinds of apps are you writing in Java? This should give us an idea of the "state of Java" today. Has the Java tide shifted from Swing desktop apps to Android mobile apps? If you write programs in a JVM language (such as Scala or Groovy), mention it.

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  • How to use Pixel Bender (pbj) in ActionScript3 on large Vectors to make fast calculations?

    - by Arthur Wulf White
    Remember my old question: 2d game view camera zoom, rotation & offset using 'Filter' / 'Shader' processing? I figured I could use a Pixel Bender Shader to do the computation for any large group of elements in a game to save on processing time. At least it's a theory worth checking. I also read this question: Pass large array to pixel shader Which I'm guessing is about accomplishing the same thing in a different language. I read this tutorial: http://unitzeroone.com/blog/2009/03/18/flash-10-massive-amounts-of-3d-particles-with-alchemy-source-included/ I am attempting to do some tests. Here is some of the code: private const SIZE : int = Math.pow(10, 5); private var testVectorNum : Vector.<Number>; private function testShader():void { shader.data.ab.value = [1.0, 8.0]; shader.data.src.input = testVectorNum; shader.data.src.width = SIZE/400; shader.data.src.height = 100; shaderJob = new ShaderJob(shader, testVectorNum, SIZE / 4, 1); var time : int = getTimer(), i : int = 0; shaderJob.start(true); trace("TEST1 : ", getTimer() - time); } The problem is that I keep getting a error saying: [Fault] exception, information=Error: Error #1000: The system is out of memory. Update: I managed to partially workaround the problem by converting the vector into bitmapData: (Using this technique I still get a speed boost of 3x using Pixel Bender) private function testShader():void { shader.data.ab.value = [1.0, 8.0]; var time : int = getTimer(), i : int = 0; testBitmapData.setVector(testBitmapData.rect, testVectorInt); shader.data.src.input = testBitmapData; shaderJob = new ShaderJob(shader, testBitmapData); shaderJob.start(true); testVectorInt = testBitmapData.getVector(testBitmapData.rect); trace("TEST1 : ", getTimer() - time); }

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  • CodePlex Daily Summary for Thursday, July 05, 2012

    CodePlex Daily Summary for Thursday, July 05, 2012Popular ReleasesTaskScheduler ASP.NET: Release 2 - 1.1.0.0: Release 2 - Version 1.1.0.0 In this version the following features were added to the library: Event fired on all tasks end The ASP.NET project takes a example of management of scheduled tasks.Umbraco CMS: Umbraco 4.8.0 Beta: Whats newuComponents in the core Multi-Node Tree Picker, Multiple Textstring, Slider and XPath Lists Easier Lucene searching built in IFile providers for easier file handling Updated 3rd party libraries Applications / Trees moved out of the database SQL Azure support added Various bug fixes Getting Started A great place to start is with our Getting Started Guide: Getting Started Guide: http://umbraco.codeplex.com/Project/Download/FileDownload.aspx?DownloadId=197051 Make sure to...CODE Framework: 4.0.20704.0: See CODE Framework (.NET) Change Log for changes in this version.?????????? - ????????: All-In-One Code Framework ??? 2012-07-04: http://download.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1codechs&DownloadId=216140 ???OneCode??????,??????????10????Microsoft OneCode Sample,????4?Windows Base Sample,2?XML Sample?4?ASP.NET Sample。???????????。 ????,?????。http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1code&DownloadId=128165 Windows Base Sample CSCheckOSBitness VBCheckOSBitness CSCheckOSVersion VBCheckOSVersion XML Sample CSXPath VBXPath ASP.NET Sample CSASPNETDataPager VBASPNET...sheetengine - Isometric HTML5 JavaScript Display Engine: sheetengine v1.0: The first release of sheetengine. See sheetengine.codeplex.com for a list of features and examples.AssaultCube Reloaded: 2.5.1 Intrepid Fixed: Linux has Ubuntu 11.10 32-bit precompiled binaries and Ubuntu 10.10 64-bit precompiled binaries, but you can compile your own as it also contains the source. If you are using Mac or other operating systems, download the Linux package. Try to compile it. If it fails, download a virtual machine. The server pack is ready for both Windows and Linux, but you might need to compile your own for Linux (source included) If you use the default maprot or any maprot, you need to fix it Well, 2.5 was...xUnit.net - Unit testing framework for C# and .NET (a successor to NUnit): xUnit.net 1.9.1: xUnit.net release 1.9.1Build #1600 Important note for Resharper users: Resharper support has been moved to the xUnit.net Contrib project. Important note for TestDriven.net users: If you are having issues running xUnit.net tests in TestDriven.net, especially on 64-bit Windows, we strongly recommend you upgrade to TD.NET version 3.0 or later. Important note for VS2012 users: The VS2012 runner is in the Visual Studio Gallery now, and should be installed via Tools | Extension Manager from insi...NETDeob0: NETDeob 0.2.0: - Big structural changes - Safer signature identification - More accurate signatures - Minor bugs fixed - Minor compability issues fixedMVC Controls Toolkit: Mvc Controls Toolkit 2.2.0: Added Modified all Mv4 related features to conform with the Mvc4 RC Now all items controls accept any IEnumerable<T>(before just List<T> were accepted by most of controls) retrievalManager class that retrieves automatically data from a data source whenever it catchs events triggered by filtering, sorting, and paging controls move method to the updatesManager to move one child objects from a father to another. The move operation can be undone like the insert, update and delete operatio...BlackJumboDog: Ver5.6.6: 2012.07.03 Ver5.6.6 (1) ???????????ftp://?????????、????LIST?????Mini SQL Query: Mini SQL Query (v1.0.68.441): Just a bug fix release for when the connections try to refresh after an edit. Make sure you read the Quickstart for an introduction.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.58: Fix for Issue #18296: provide "ALL" value to the -ignore switch to ignore all error and warning messages. Fix for issue #18293: if encountering EOF before a function declaration or expression is properly closed, throw an appropriate error and don't crash. Adjust the variable-renaming algorithm so it's very specific when renaming variables with the same number of references so a single source file ends up with the same minified names on different platforms. add the ability to specify kno...LogExpert: 1.4 build 4566: This release for the 1.4 version line contains various fixes which have been made some times ago. Until now these fixes were only available in the 1.5 alpha versions. It also contains a fix for: 710. Column finder (press F8 to show) Terminal server issues: Multiple sessions with same user should work now Settings Export/Import available via Settings Dialog still incomple (e.g. tab colors are not saved) maybe I change the file format one day no command line support yet (for importin...View Layout Replicator for Microsoft Dynamics CRM 2011: View Layout Replicator (1.0.1802.65): Add support for OSDP authenticationCommonLibrary.NET: CommonLibrary.NET 0.9.8.5 - Final Release: A collection of very reusable code and components in C# 4.0 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Holiday Calendars, Logging, Authentication, and much more. FluentscriptCommonLibrary.NET 0.9.8 contains a scripting language called FluentScript. Releases notes for FluentScript located at http://fluentscript.codeplex.com/wikipage?action=Edit&title=Release%20Notes&referringTitle=Documentation Fluentscript - 0.9.8.5 - Final ReleaseApplication: FluentScript Versio...SharePoint 2010 Metro UI: SharePoint 2010 Metro UI8: Please review the documentation link for how to install. Installation takes some basic knowledge of how to upload and edit SharePoint Artifact files. Please view the discussions tab for ongoing FAQsnopCommerce. Open source shopping cart (ASP.NET MVC): nopcommerce 2.60: Highlight features & improvements: • Significant performance optimization. • Use AJAX for adding products to the cart. • New flyout mini-shopping cart. • Auto complete suggestions for product searching. • Full-Text support. • EU cookie law support. To see the full list of fixes and changes please visit the release notes page (http://www.nopCommerce.com/releasenotes.aspx).THE NVL Maker: The NVL Maker Ver 3.51: http://download.codeplex.com/Download?ProjectName=nvlmaker&DownloadId=371510 ????:http://115.com/file/beoef05k#THE-NVL-Maker-ver3.51-sim.7z ????:http://www.mediafire.com/file/6tqdwj9jr6eb9qj/THENVLMakerver3.51tra.7z ======================================== ???? ======================================== 3.51 beta ???: ·?????????????????????? ·?????????,?????????0,?????????????????????? ·??????????????????????????? ·?????????????TJS????(EXP??) ·??4:3???,???????????????,??????????? ·?????????...????: ????2.0.3: 1、???????????。 2、????????。 3、????????????。 4、bug??,????。Magelia WebStore Open-source Ecommerce software: Magelia WebStore 2.0: User Right Licensing ContentType version 2.0.267.1New Projects$ME: a new kind of javascript library.NET Micro Framework Driver Library: .NET Micro Framework Driver Library This is just a library of classes that I have created that can be used by Micro Framework Devices. aishe: ?????????BoogieTools: The goal of this project is to provide editors and additional tools to improve working with the Microsoft Boogie language and tools.BWAPI-CLI: .NET wrapper for the Broodwar API (BWAPI) and Broodwar Terrain Analyzer (BWTA) written in C++/CLICoffee Survey Framework: Coffee Survey Framework is an extensible, XML-based ASP.NET 4.0 framework for building and maintaining tabular survey pages. Dauphine SmartControls for K2 blackpearl: SmartControls for K2 blackpearl simplifies the integration of K2 blackpearl processes with ASP.NET web forms. It is a collection of ASP.NET web controls with both design-time and run-time capabilities for code-less integration to K2 blackpearl processes. The underlying framework of SmartControls for K2 blackpearl can also be used to extend existing ASP.NET web controls with the same K2 blackpearl integration capabilities that it offers.Easy Full-Text Search Queries: Very lightweight class to convert user-friendly search queries into Microsoft SQL Server Full-Text Search queries. Gracefully handles errors in input query.EnvironmentCheck: A Windows Forms application which will read from an XML config a number of checks which need to be performed to verify that a server meets pre-reqs.Lindeberg edge detector: Just a simple program I wrote for 'Image processing fundamentals' course MesanAnsatte: Prosjekt for utforskning av .net. Multi-Touch Scrum tool: This is a application use to support Scrum software development, based on Microsoft Surface SDK 2.0.MyWCFService: This project is a simple explanation for WCF service, that can help you understand how the WCF works!!race4fun engine: Open source driving simulator. Modable engine for easy use. SchoolManagerMVC: School Management System, written in MVC3 with unity framework, DI unity and unit testsSharePoint Managed Metadata Claims Provider: Custom Claims Provider implementation for SharePoint. Claims Playground.SQL data access: .NET library for accessing a Microsoft SQL Server database.sqlscriptmover: Exports stored procedures, function, views, tables and triggers to individual files or imports same and attempts to create in designated database.

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  • Reading source code to learn

    - by perl.j
    As you develop as a programmer, IMO, you begin to see different practices, different Algorithms, and "more than one way to do it". Seeing this code can be a great learning experience for you, even though you did not write the code. But is doing this only going to confuse you? For example, let's say you have a library in any language that was created by a colleague, and you have been using it for a while. You decide to look at the actual source code, regardless of how extensive it is, and get a better look at how this library is written. For the sake of example, the function you use most often from this library is the max function, which finds the largest of two numbers. But this function is a lot more complicated than it needs to be. The way it is written is confusing the heck out of you, and you don't know how this works. Will this make you a better programmer, because you realize how complicated it is for such a simple function, or will it make you a worse coder because you feel less confidant? So my question, in general, is does reading source code make you a better programmer and if so how? If not why do people still do it?.

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  • Iphone/Android app – chatroom development – what framework & hosting needs?

    - by MikaelW
    I have some experience regarding IPhone and Android development but I am now struggling to solve a new class of problem: apps that involve a client/server chatroom feature. That is, an app when people can exchange text over the internet, and without having the app to constantly “pull” content from the server. So that problem can’t be solved with a normal php/mysql website, there must be some kind of application running on a server that is able to send message from the server to the phone, rather than having the phone to check for new messages every 10 seconds… So I’m looking for ways to solve the different problems here: What framework should I use on the two sides (phone / server)? It should be some kind of library that doesn’t prevent me to write paid apps. It should also be possible to have the same server for the Iphone and android version of the app. What server / hosting solution do I need with what sort of features, I just have no experience regarding server application that can handle and initiate multiple connections and are hosted on hardware that is always online I tried to find resources online but couldn’t so far, either the libraries had the wrong kind of license/language or I just didn’t understand… Sometimes there were nice tutorial but for different needs such as peer2peer chat over local network… Same with the server and the hosting problem, not sure where to start really, I’m calling for help and I promise I will complete this page with notes about the experience I will get :-) Obviously the ideal would be to find a tutorial I missed that include client code, server code and a free scalable server… That being said, If I see something as good, it probably means that I have eaten the wrong kind of mushroom again… So, failing that, any pointer which might help me toward that quest, would be greatly appreciated. Thanks in advance. Mikael

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  • What does your Lisp workflow look like?

    - by Duncan Bayne
    I'm learning Lisp at the moment, coming from a language progression that is Locomotive BASIC - Z80 Assembler - Pascal - C - Perl - C# - Ruby. My approach is to simultaneously: write a simple web-scraper using SBCL, QuickLisp, closure-html, and drakma watch the SICP lectures I think this is working well; I'm developing good 'Lisp goggles', in that I can now read Lisp reasonably easily. I'm also getting a feel for how the Lisp ecosystem works, e.g. Quicklisp for dependencies. What I'm really missing, though, is a sense of how a seasoned Lisper actually works. When I'm coding for .NET, I have Visual Studio set up with ReSharper and VisualSVN. I write tests, I implement, I refactor, I commit. Then when I'm done enough of that to complete a story, I write some AUATs. Then I kick off a Release build on TeamCity to push the new functionality out to the customer for testing & hopefully approval. If it's an app that needs an installer, I use either WiX or InnoSetup, obviously building the installer through the CI system. So, my question is: as an experienced Lisper, what does your workflow look like? Do you work mostly in the REPL, or in the editor? How do you do unit tests? Continuous integration? Packaging & deployment? When you sit down at your desk, steaming mug of coffee to one side and a framed photo of John McCarthy to the other, what is it that you do? Currently, I feel like I am getting to grips with Lisp coding, but not Lisp development ...

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  • What platform to use for browser based turn based strategy game

    - by sunwukung
    I want to write a browser based strategy game that can be played by two players in separate locations. The game itself is predominantly turn based. To that end, I want to determine the correct platform on which to build this game. To prevent gamers "gaming" the system, the business logic needs to reside in the server. I could arguably use AJAX for a large part of the games functionality, but at two key points in the game loop, the opposing player can "counter" the current players move. In addition, when it's time for the players to swap, AJAX polling is likely to fall short, so it's starting to look like WebSockets is going to be a requirement to pull this off smoothly. So, the remaining question is regarding the back end. I'd kinda like to build this in Python/Flask - but this is primarily out of wanting to tackle a project with that language, not neccessarily because it's the appropriate tool for the job. The next most likely candidate has got to be NodeJS given it's (apparently) tighter integration with the WebSockets protocol. My question, then, is regarding the best platform on which to pursue this objective.

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  • Design of input files reading when it comes to defaults/transformations

    - by Stefano Borini
    Suppose you have an application that reads an input file, on a language that does not support the concept of None. The input is read, parsed, and the contents are stored on a structure for later use. Now, in general you want to keep into account transformation of the data from the input, such as adding default values when not specified, or adding full path information to relative path specified in the input. There are two different strategies to achieve this. The first strategy is to perform these transformations at input file reading time. In practice, you put all the intelligence into the input parser, and your application has no logic to deal with unexpected circumstances, such as an unspecified value. You lose the information of what was specified and what wasn't, but you gain in black-boxing the details. Your "running code" needs that information in any case and in a proper form, and is not concerned if it's the default or a user-specified information. The second strategy is to have the file reader a real one-to-one mapper from the file to a memory-stored object, with no intelligent behavior. unspecified values are not filled (which may however be a problem in languages not supporting None) and data is stored verbatim from the file. The intelligence for recovery must now go into the "running code", which must check what was specified in the file, eventually fall back to a default, or modify the input properly before using it. I would like to know your opinion on these two approaches, and in particular which one you found the most frequently implemented.

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  • Is there a visual web application builder or rapid webapp prototyping framework?

    - by Jesper Mortensen
    Question: Is there such a thing as a self-hosted framework or CMS especially tailored towards the creation of interactive web applications without -- or with an absolute minimum of -- programming? (Substantially less programming than say a simple Rails app or a plugin for Wordpress, Joomla etc would require.) As for desired features I'd settle for whatever is available, but some ideas could be: A User authentication and Permissions system. A GUI-driven input form builder. A GUI-driven template / visual site design builder. A simple scripting language (think AppleScript-like simplicity) A highly modular architecture, with high-level business objects (users, forms data, etc) exposed for easy re-use. If something like the above doesn't exist, then what comes near this? Need: This is for self-hosted rapid prototyping of web applications, and limited user testing of webapp user interface designs in a closed user test. Notes: I know about Ruby on Rails (Rails), Django, Pyramid etc. I'm looking for something much faster to work in, for making prototypes. I know about CMS's in general but find that most of them are tailored towards displaying information to the end users. If there is an exceptionally easy-to-master CMS with easy scripting (lets say much more so than for example Wordpress) then I'd be interested.

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