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• Examples of limitations in IT due to different bit length by design

  - by Alaudo

  I am teaching the course "Introduction in Programming" for the first-year students and would like to find interesting examples where the datatype size in bits, chosen by design, led to certain known restrictions or important values. Here are some examples: Due to the fact that the Bell teleprinter used 7-bit-code (later accepted as ASCII) until now have we often to encode attachments in electronic messages to contain only 7 bit data. Classical limitation of 32-bit address space leads to the 4Gb maximal RAM size available for 32-bit systems and 4Gb maximal file size in FAT32. Do you know some other interesting examples how the choice of the data type (and especially its binary length) influenced the modern IT world. Added after some discussion in comments: I am not going to teach how to overcome limitations. I just want them to know that 1 byte can hold the values from -127..0..+127 o 0..255, 2 bytes cover the range 0..65535 etc by proving examples they know from other sources, like the above-mentioned base64 encoding etc. We are just learning the basic datatypes and I am trying to find a good reference for "how large" these types are.

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• Opportunities in Development in our Swedish office

  - by anca.rosu

  Hi everyone, my name is Henrik and I joined the JRockit group in 2004. Before that my background was Microsoft, as both a Test Competence lead and as a Program Manager. As an Engineering Manager at Oracle I lead a team of 11 developers. I focus on people management and the daily operations of the department with a heavy focus on interaction and dependencies between the groups and departments here at the Stockholm development site. I also make sure my team deliver on our commitments. I would like to give you a brief summary of the Oracle JRockit team: -The development group in Stockholm delivers several products for the Oracle Fusion Middleware stack. Our main products are JRockitVE which allows you to run a Java Virtual Machine without an operating system, the JRockit Java Virtual Machine which is the default jvm for all Oracle middleware products, and the JRockit MissionControl, a set of tools that allows developers to monitor their applications at runtime and perform advanced latency analysis as well as in-production memory leak detection etc. -The office has several departments focusing on different aspects of the product development process, not only to build features and test them but everything from building the infrastructure needed to automatically build and test the products to sustaining engineering that tracks down bugs in customer systems and provide them with patches. Some inspirational lines around what the Oracle JRockit group can offer you in terms of progress, development and learning: - It is a unique chance to get insight and experience building enterprise class software for one of the worlds largest software companies. Here there are almost unlimited possibilities for the right candidate to learn about silicon features and how to implement support for this in software, and to compile optimizations. The position will also give insight into the processes needed to produce software at this level in the industry. 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: Development,Sweden,Jrockit,Java,Virtual Machine,Oracle Fusion Middleware,software

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• How to See Your Current Wi-Fi Connection Speed in Mac OS X

  - by The Geek

  Ever since I’ve been using my new MacBook Air, I’ve been befuddled by how to do some of the simplest tasks in Mac OS X that I would normally do from my Windows laptop—like show the connection speed for the current Wi-Fi network. So am I using Wireless-N or not? Normally, on my Windows 7 laptop, all I’d have to do is hover over the icon, or pop up the list—you can even go into the network details and see just about every piece of data about the network, all from the system tray. Here’s how to see your current connection information on your Mac Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Free Shipping Day is Friday, December 17, 2010 – National Free Shipping Day Find an Applicable Quote for Any Programming Situation Winter Theme for Windows 7 from Microsoft Score Free In-Flight Wi-Fi Courtesy of Google Chrome Peaceful Winter Road at Sunset Wallpaper Everything You Ever Wanted to Know About Why Pac-Man’s Ghosts Move the Way They Do

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• Distributed transactions and queues, ruby, erlang

  - by chrispanda

  I have a problem that involves several machines, message queues, and transactions. So for example a user clicks on a web page, the click sends a message to another machine which adds a payment to the user's account. There may be many thousands of clicks per second. All aspects of the transaction should be fault tolerant. I've never had to deal with anything like this before, but a bit of reading suggests this is a well known problem. So to my questions. Am I correct in assuming that secure way of doing this is with a two phase commit, but the protocol is blocking and so I won't get the required performance? It appears that DBs like redis and message queuing system like Rescue, RabbitMQ etc don't really help me a lot - even if I implement some sort of two phase commit, the data will be lost if redis crashes because it is essentially memory-only. All of this has led me to look at erlang - but before I wade in and start learning a new language, I would really like to understand better if this is worth the effort. Specifically, am I right in thinking that because of its parallel processing capabilities, erlang is a better choice for implementing a blocking protocol like two phase commit, or am I confused?

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• Rendering Text with the HTML5 Canvas

  - by dwahlin

  In a previous post I walked through the fundamentals of rendering shapes such as squares and circles using the HTML5 Canvas API. In this post I’ll provide a simple example of rendering and rotating text. To render text you can use the fillText() or strokeText() functions which take the text to render as well as the x and y coordinates of where to render it. To rotate text you can use the transform functions available with the HTML5 Canvas such as save(), rotate(), and restore(). To run the live demos that follow click the Result tab in the blue bar of each demo.   Rendering Text This example provides a simple look at how text can be rendered using the HTML5 Canvas. It iterates through a loop, updates the text and font size dynamically, measures the width of the text using the measureText() function, and then calls fillText() to render the text with the desired font size to the screen.   Here’s what the code above renders:   Rotating Text This example shows how text can be rendered and even rotated by using transform functions built into the HTML5 Canvas. The code starts by rendering text the standard way using fillText(). It then saves the state of the canvas performs an x,y coordinate transform (moves to 100, 300 respectively) and then rotates the canvas –90 degrees using the rotate() function. After the text is rendered, the canvas is reverted back to it’s existing state (saved by calling the save() function) by calling the restore() function. An additional line of text is then rendered.   Here’s what the code above renders:   If you’re interested in learning more about the HTML5 Canvas and how it can be used in your Web or Windows 8 applications, check out my HTML5 Canvas Fundamentals course from Pluralsight.

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• Should I go with OpenGL to see my future in Game Development industry? [closed]

  - by Priyank

  Possible Duplicate: Should I continue studying OpenGL or just switch to DirectX to give me a better chance of landing a job in the game industry? I tried Google but found quite old articles, so I am in search of an answer in context to year 2012. Hi all, I don't know if you will consider this question appropriate for this community but I am constantly searching for a perfect answer. What I have seen is that most of the games that are released these days are DirectX 1x based. Except for few games like Starcraft or Diablo which don't have high end graphics are using OpenGL. So I have few questions to ask. The platforms i would like to target are PC (windows), Xbox 360 and PS3 (must). Should I go with learning OpenGL to see my future in game development industry? Or should I shift to Directx? If I learn OpenGL first, will it be difficult to learn direcx then? Which API is most suitable for indie development? Which one of the two API's are better from coder's (programmer's) point of view? Like OOP and style of coding. Is openGL being cross platform should be the only reason to choose it over Directx? Even when vendors are not providing enough stable drivers for it. Thanks in advance. I have read this post, but I have few questions. Should I continue studying OpenGL or just switch to DirectX to give me a better chance of landing a job in the game industry?

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• The Twelve Days of Geekmas

  - by YatriTrivedi

  Looking for some last minute shopping for your favorite geek? We put a few holiday shopping items into the form of a song to show off just how geeky your Christmas can be. Make sure that you read through the list to the tune of the Twelve Days of Christmas. Yes, we’re really being silly today. Have fun! Image by dawolf On the twelfth day of Geekmas, a dear friend gave to me… Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor The Brothers Mario – Epic Gangland Style Mario Brothers Movie Trailer [Video] Score Awesome Games on the Cheap with the Humble Indie Bundle Add a Colorful Christmas Theme to Your Windows 7 Desktop This Windows Hack Changes the Blue Screen of Death to Red Edit Images Quickly in Firefox with Pixlr Grabber Zoho Writer, Sheet, and Show Now Available in Chrome Web Store

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• Why is it that software is still easily pirated today?

  - by mohabitar

  I've always been curious about this. Now I wouldn't call myself a programmer yet, but I'm learning, so maybe the answer to this is obvious. It just seems a little hard to believe that with all of our technological advances and the billions of dollars spent on engineering the most unbelievable and mind-blowing software, we still have no other means of protecting against piracy then a "serial number/activation key". I'm sure a ton of money, maybe even billions, went into creating Windows 7 or Office and even Snow Leopard, yet I can get it for free in less than 20 minutes. Same for all of Adobe's products, which are probably the easiest. I guess my question is: can there exist a fool proof and hack proof method of protecting your software against piracy? If not realistically, how about theoretically possible? Or no matter what mechanisms these companies deploy, hackers can always find a way around it? EDIT: So apparently, the answer is no. There's pretty much no way. And so I'm sure these big companies have realized this as well. Should they adopt another sales model rather than charging a crapload for their software (I know its justified and they put a lot of hard work into their software, but its still a lot of money). Are there any alternative solutions that will benefit both the company and the user (i.e. if you purchase our product, we'll apply $X dollars to your account that will apply to future purchases from our company)?

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• Logarithmic spacing of FFT bins

  - by Mykel Stone

  I'm trying to do the examples within the GameDev.net Beat Detection article ( http://archive.gamedev.net/archive/reference/programming/features/beatdetection/index.html ) I have no issue with performing a FFT and getting the frequency data and doing most of the article. I'm running into trouble though in the section 2.B, Enhancements and beat decision factors. in this section the author gives 3 equations numbered R10-R12 to be used to determine how many bins go into each subband: R10 - Linear increase of the width of the subband with its index R11 - We can choose for example the width of the first subband R12 - The sum of all the widths must not exceed 1024 He says the following in the article: "Once you have equations (R11) and (R12) it is fairly easy to extract 'a' and 'b', and thus to find the law of the 'wi'. This calculus of 'a' and 'b' must be made manually and 'a' and 'b' defined as constants in the source; indeed they do not vary during the song." However, I cannot seem to understand how these values are calculated...I'm probably missing something simple, but learning fourier analysis in a couple of weeks has left me Decimated-in-Mind and I cannot seem to see it.

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• CodePlex Daily Summary for Sunday, March 11, 2012

  CodePlex Daily Summary for Sunday, March 11, 2012Popular ReleasesSubExtractor: Release 1026: Fix: multi-colored bluray subs will no longer result in black blob for OCR Fix: dvds with no language specified will not cause exception in name creation of subtitle files Fix: Root directory Dvds will use volume label as their directory nameExtensions for Reactive Extensions (Rxx): Rxx 1.3: Please read the latest release notes for details about what's new. Related Work Items Content SummaryRxx provides the following features. See the Documentation for details. Many IObservable<T> extension methods and IEnumerable<T> extension methods. Many wrappers that convert asynchronous Framework Class Library APIs into observables. Many useful types such as ListSubject<T>, DictionarySubject<T>, CommandSubject, ViewModel, ObservableDynamicObject, Either<TLeft, TRight>, Maybe<T>, Scala...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.47: Properly output escaped characters in CSS identifiers throw an EOF error when parsing a CSS selector that doesn't end in a declaration block chased down a stack-overflow issue with really large JS sources. Needed to flatten out the AST tree for adjacent expression statements that the application merges into a single expression statement, or that already contain large, comma-separated expressions in the original source. fix issue #17569: tie together the -debug switch with the DEBUG defi...Player Framework by Microsoft: Player Framework for Windows 8 Metro (BETA): Player Framework for HTML/JavaScript and XAML/C# Metro Style Applications.WPF Application Framework (WAF): WAF for .NET 4.5 (Experimental): Version: 2.5.0.440 (Experimental): This is an experimental release! It can be used to investigate the new .NET Framework 4.5 features. The ideas shown in this release might come in a future release (after 2.5) of the WPF Application Framework (WAF). More information can be found in this dicussion post. Requirements .NET Framework 4.5 (The package contains a solution file for Visual Studio 11) The unit test projects require Visual Studio 11 Professional Changelog All: Upgrade all proje...SSH.NET Library: 2012.3.9: There are still few outstanding issues I wanted to include in this release but since its been a while and there are few new features already I decided to create a new release now. New Features Add SOCKS4, SOCKS5 and HTTP Proxy support when connecting to remote server. For silverlight only IP address can be used for server address when using proxy. Add dynamic port forwarding support using ForwardedPortDynamic class. Add new ShellStream class to work with SSH Shell. Add supports for mu...EntitiesToDTOs - Entity Framework DTO Generator: EntitiesToDTOs.v2.1: Changelog Fixed template file access issue on Win7. Fix on configuration load when target project was not found and "Use project default namespace" was checked. Minor fix on loading latest configuration at startup. Minor fix in VisualStudioHelper class. DTO's properties accessors are now in one line. Improvements in PropertyHelper to get a cleaner and more performant code. Added Website project type as a not supported project type. Using Error List pane from VS IDE to show Enti...DotNetNuke® Community Edition CMS: 06.01.04: Major Highlights Fixed issue with loading the splash page skin in the login, privacy and terms of use pages Fixed issue when searching for words with special characters in them Fixed redirection issue when the user does not have permissions to access a resource Fixed issue when clearing the cache using the ClearHostCache() function Fixed issue when displaying the site structure in the link to page feature Fixed issue when inline editing the title of modules Fixed issue with ...Mayhem: Mayhem Developer Preview: This is the developer preview of Mayhem. Enjoy!Magelia WebStore Open-source Ecommerce software: Magelia WebStore 1.2: Medium trust compliant lot of small change for medium trust compliance full refactoring of user management refactoring of Client Refactoring of user management Magelia.WebStore.Client no longer reference Magelia.WebStore.Services.Contract Refactoring page category multi parent category added copy category feature added Refactoring page catalog copy catalog feature added variant management improvement ability to define a default variant for a variable product ability to ord...PDFsharp - A .NET library for processing PDF: PDFsharp and MigraDoc Foundation 1.32: PDFsharp and MigraDoc Foundation 1.32 is a stable version that fixes a few bugs that were found with version 1.31. Version 1.32 includes solutions for Visual Studio 2010 only (but it should be possible to add the project files to existing solutions for VS 2005 or VS 2008). Users of VS 2005 or VS 2008 can still download version 1.31 with the solutions for those versions that allow them to easily try the samples that are included. While it may create smaller PDF files than version 1.30 because...Mag-tools, Asherons Call Decal Plugin: Mag-SuitBuilder 1.0.0.1: This is a standalone windows application that can help you put together a suit of armor.Ruminate XNA 4.0 GUI: Release 1.0.7: Fixed multiple issues with the layout and input system. Fixed Scrollbars. Introduced new layout system that will be further utilized in future updates.FaST-LMM: FActored Spectrally Transformed Linear Mixed Models: FaSTLMM v1.07 Binaries for Windows and Linux: These files contain the files necessary to run FaSTLMM on Windows or Linux along with the license and users manual. To download FaSTLMM source code, please follow the changeset link located above to the Source Code tab. The FaSTLMM.Win.zip download contains both C++ and CSharp executable versions of FaSTLMM. No installer is required, just UnZip the file into a directory and run from there. Or put the installation directory on your path and run it from anywhere. The C++ version included r...Terminals: Version 2.0 - Release: Changes since version 1.9a:New art works New usability in Organize favorites window Improved usability of imports/exports and scans Large number of fixes Improvements in single instance mode Comparing November beta 4, this corrects: New application icons Doesn't show Logon error codes Fixed command line arguments exception for single instance mode Fixed detaching of tabs improved usability in detached window Fixed option settings for Capture manager Fixed system tray noti...MFCMAPI: March 2012 Release: Build: 15.0.0.1032 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeTortoiseHg: TortoiseHg 2.3.1: bugfix releaseSense/Net CMS - Enterprise Content Management: SenseNet 6.0.8 Community Edition: Sense/Net 6.0.8 Community EditionMain new features:send emails to lists and libraries localize the UI with WYSIWYG string resource editor define allowed child types on content types. Our new release brings the most new features and optimizations in the history of Sense/Net Community Edition. Alongside the biggest features detailed below in this release you will find features like uploading or copy-pasting images, security enhancements, customizable login processes, customizable notificati...CommonLibrary: Code: CodePowerGUI Visual Studio Extension: PowerGUI VSX 1.5.2: Added support for PowerGUI 3.2.New ProjectsCRFSharp: CRFSharp is Conditional Random Fields implemented by .NET(C#), a machine learning algorithm for learning from labeled sequences of examples. It is widely used in Natural Language Process (NLP) tasks, for example: word breaker, postaging, named entity recognized and so on.Custom MsBuild Tasks: An attempt to write a custom task for MsBuild. Needed a task to remove comments from web.config. Downr: Downr is a super simple UI which forces the computer to shutdown after a certain time of the day. Included is a .ADMX and a .ADML file for controlling Downr through group policies.Excel Report: Easiest way to create reports in Microsoft Excel XML format using XML data and XSLThcr38550: hcr3850 TESTModular MediaStreamSource: Modular MediaStreamSource project. paidmailclicker: .Pivottable web part: Provide a highly configurable AJAX PivotTable for Display purposes across webs or across sites. SharePoint YouTube Video Web Part Suite: The available Web Parts helps you to integarte Videos from YouTube into your SharePoint site. In contrast to the out of the box Media Web part, the new Web Parts are designed especial for YouTube videos. Connect your YouTube channel and choose the videos you want to see.ShareTest: This C# project offers a small lightweight framework (and also guidance) on how it's possible to test SharePoint using selenium in a reusable and clean way. The project follows the "Page Object" design pattern, so that instead of having to parse css, ids, xpath etc, directly in your test cases, you can now deal with c# page objects to make testing more readable and reusable. Note! This project is only one week old and I am actively using it to test DocRead, so I will refine and improve as ...Simeranya Project: Simeranya ProjectSlime Keeper: A game where you buy and sell slimes. They tend to multiply on their own using simple genetics!SunamoBlogConverter: The program for converting export formats between Wordpress and Blogger with further work with them. The program converts yet only posts without comments and pages. The program was tested on parse my blog with 1,450 posts. Essential parts of the program is in EN,remaining in CS.webpart: Free webparts for Sharepoint 2007 and 2010WPF Shapes: A library of ready to use WPF shapes, such as hexagons, speech bubbles, triangles etc.YoutubeExtractor: YoutubeExtractor is a library for .NET, written in C#, to extract the download link from YouTube videos, download them, and/or extract their audio track. It is based on the youtubeFisher project (http://youtubefisher.codeplex.com/) and aims to create an API instead of a GUI application.??? "??????": ?????? ??? ???????????????? ??????: ??????????? ???????? ?????? ???????????? ??????

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• Koans, now available in Python flavor

  - by Greg Malcolm

  Recently a Python developer friend with whom I was pair programming with suggested that I show him how to write a little Ruby. I responded by telling him to check out Ruby Koans as a starting point. However I wanted to try that in reverse at the same time with me learning some Python. I did a bit of googling, and sure enough someone had started writing some Python Koans. It just needed finishing... So, a few weeks later Python Koans is now complete and ready for action! It is available through Mercurial on Bitbucket: http://bitbucket.org/gregmalcolm/python_koans/wiki/Home It is also mirrored on Github: http://wiki.github.com/gregmalcolm/python_koans/ Converting it was fairly easy. Aside from the differing philosophical approaches behind the two languages, Ruby and Python are fairly similar. We had to come up with completely new material for a few subjects like multiple inheritance and decorators, but for most features in Ruby there is something roughly comparable in Python. I highly recommend writing tests (or koans) as a means to lean a new language or framework. I've learned a lot from doing this.

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• ArchBeat Link-o-Rama for 101/10/2011

  - by Bob Rhubart

  All day, all architecture. Oracle Technology Network Architect Day - Phoenix, AZ - Dec 14. Free registration. Spend the day with your peers learning from Oracle experts in Cloud Computing, Engineered Systems, Oracle WebLogic, Oracle Coherence, Application-Driven Virtualization, and more. Registration is free, but seating is limited. Register now! Data Integration - Bad data is really the monster | Bikram Sinha "Bad data can cause huge operational failure and cost millions of dollars in terms of time and resources to clean up and validate data across multiple participating systems," says Bikram Sinha. Changing a navigation model on a page in WebCenter | Edwin Biemond Another illustrated how-to from Oracle ACE Edwin Biemond. Why do I need an Authenticator when I have an Identity Asserter? | Chris Johnson Chris Johnson responds to a user question. OOW: The Most Important Thing | Floyd Teter Oracle ACE Director Floyd Teter explains why he sees "the inclusion of Fusion Applications CRM and HCM in the Oracle Public Cloud" as the most important news to come out of Oracle OpenWorld 2011. Oracle Releases Oracle Solaris 11 | Gokhan Atil Atil offers an overview of some of the "key points" of the new Solaris 11 release. SOA Development Virtual Developer Day (On Demand) You won't get the hands-on experience available in the live event, but if you will learn learn how a SOA approach can be implemented, whether starting afresh with new services or reusing existing services. Webcast: Maximum Availability on Private Clouds - Nov 10 - 10am PT/ 1pm ET Featuring Margaret Hamburger (Director, Product Marketing, Oracle) and Joe Meeks (Director, Product Management, Oracle). Should Enterprise Architecture Teams Be More Focused on Innovation? | Richard Seroter Richard Seroter looks answers among opinions offered by Forrester analyst Brian Hopkins and Jude Umeh of CapGemini.

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• How do you stay productive when dealing with extremely badly written code?

  - by gaearon

  I don't have much experience in working in software industry, being self-taught and having participated in open source before deciding to take a job. Now that I work for money, I also have to deal with some unpleasant stuff, which is normal of course. Recently I was assigned to add logging to a large SharePoint project which is written by some programmer who obviously was learning to code on the job. After 2 years of collaboration, the client switched to our company, but the damage was done, and now somehow I need to maintain this code. Not that the code was too hard to read. Despite problems - each project has one class with several copy-pasted methods, enormous if nestings, Systems Hungarian, undisposed connections — it's still readable. However, I found myself absolutely unproductive despite working on something as simple as adding logging. Basically, I just need to go through the code step by step and add some trace calls. However, the idiocy of the code is so annoying that I get tired within 10 minutes of starting. In the beginning, I used to add using constructs, reduce nesting by reversing if's, rename the variables to readable names—but the project is large, and eventually I gave up. I know this is not the task I should be doing, but at least reducing the mess gave me some kind of psychological reward so I could keep going. Now the trick stopped working, and I still have 60% of my work to do. I started having headaches after work, and I no longer get the feeling of satisfaction I used to get - which would usually allow me to code for 10 hours straight and still feel fresh. This is not just one big rant, for I really do have an actual question: Is there a way to stay productive and not to fight the windmills? Is there some kind of psychological trick to stay focused on the task, instead of thinking “How stupid is that?” each time I see another clever trick by the previous programmer? The problem with adding logging is that I actually have to understand what the code does, and doing so hurts my brain in an unpleasant fashion.

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• Didatic approaches to teach versioning with Git

  - by Herberth Amaral

  I have already taught versioning with Git, but I think it could be more enjoyable for the guys I teach if I use another approach to teach them. The guys I mentioned before were used to working with SVN and I tried to teach Git based on SVN. Not such a good idea. It seems that some guys/teams which use SVN need a re-education on version control when they're learning Git or another DCVCS. In another attempt, I tried to show a scenario where a development team try to work without a (D)VCS and then I showed how their lives could be easier if they used a (D)VCS. I had the impression that part of the audience left the presentation without a clue what I was talking about. I've taught other classes on other subjects without problems, so I think this is not a issue with me as a teacher, but with my method. I know Git and versioning as well I know the other subjects I've presented to the other classes. So, basically, how to teach Git/DCVCS? Start with some diffs/patches and manual versioning and then teach how it can be more productive with Git? Start with Git object model? Or try to start with some pretty commands and try to save some time? To be clear: I'm looking for approaches on how to teach DCVCS (focusing on Git) effectively, based on real experiences.

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• can connect to wifi router but not the internet 12.10

  - by harsh

  I believe i have tried every trick in the book ! I am able to access my router from my ubuntu desktop but not even a single site on the internet. i have installed the drivers for my pci wifi card following this procedure : http://steveswinsburg.wordpress.com/2011/03/12/how-to-install-a-d-link-dwa-525-wireless-network-card-in-ubuntu-10-04/ Earlier it didn't connect to the internet and kept prompting me for the password. after i installed the driver it got connected ! but now i cant access the internet and can only access my router. i deleted the resolv.conf file. I have also tried the "rkill" command and it shows it is unlocked. I have even tried pinging the ip's 8.8.8.8 & 8.8.4.4 and i get replies from both. I have also added them on my wifi configuration setup on ubuntu desktop. I am new to ubuntu but learning fast :-) These are the things i don't like about ubuntu, the simple tasks are difficult for a person coming from windows. I am using ubuntu 12.10. please reply at the earliest i would be very thankful.

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• Positioning a sprite in XNA: Use ClientBounds or BackBuffer?

  - by Martin Andersson

  I'm reading a book called "Learning XNA 4.0" written by Aaron Reed. Throughout most of the chapters, whenever he calculates the position of a sprite to use in his call to SpriteBatch.Draw, he uses Window.ClientBounds.Width and Window.ClientBounds.Height. But then all of a sudden, on page 108, he uses PresentationParameters.BackBufferWidth and PresentationParameters.BackBufferHeight instead. I think I understand what the Back Buffer and the Client Bounds are and the difference between those two (or perhaps not?). But I'm mighty confused about when I should use one or the other when it comes to positioning sprites. The author uses for the most part Client Bounds both for checking whenever a moving sprite is of the screen and to find a spawn point for new sprites. However, he seems to make two exceptions from this pattern in his book. The first time is when he wants some animated sprites to "move in" and cross the screen from one side to another (page 108 as mentioned). The second and last time is when he positions a texture to work as a button in the lower right corner of a Windows Phone 7 screen (page 379). Anyone got an idea? I shall provide some context if it is of any help. Here's how he usually calls SpriteBatch.Draw (code example from where he positions a sprite in the middle of the screen [page 35]): spriteBatch.Draw(texture, new Vector2( (Window.ClientBounds.Width / 2) - (texture.Width / 2), (Window.ClientBounds.Height / 2) - (texture.Height / 2)), null, Color.White, 0, Vector2.Zero, 1, SpriteEffects.None, 0); And here is the first case of four possible in a switch statement that will set the position of soon to be spawned moving sprites, this position will later be used in the SpriteBatch.Draw call (page 108): // Randomly choose which side of the screen to place enemy, // then randomly create a position along that side of the screen // and randomly choose a speed for the enemy switch (((Game1)Game).rnd.Next(4)) { case 0: // LEFT to RIGHT position = new Vector2( -frameSize.X, ((Game1)Game).rnd.Next(0, Game.GraphicsDevice.PresentationParameters.BackBufferHeight - frameSize.Y)); speed = new Vector2(((Game1)Game).rnd.Next( enemyMinSpeed, enemyMaxSpeed), 0); break;

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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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• How do I install kivy?

  - by aspasia

  I was trying to install Kivy (by following the instructions here). I downloaded and installed all packages where the installation process went through without giving me any errors. However, when later I enter below command; sudo easy_install kivy It looked like it was going to work but it ends with an error by displaying following lines, which I don't comprehend: Detected compiler is unix /tmp/easy_install-BtOA_u/Kivy-1.8.0/kivy/graphics/texture.c:8:22: fatal error: pyconfig.h: No such file or directory #include "pyconfig.h" ^ compilation terminated. error: Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 I saw a similar question asked as; Problem with kivy installation. However, this didn't work for me though the question suggests installing libgles-mesa-dev-lts-raring which I did as below; sudo apt-get install libgles-mesa-dev-lts-raring which then gave below; E: Unable to locate package libgles-mesa-dev-lts-raring (sorry for being so specific and perhaps obvious, but I'm in the early stage of learning my way around linux). This user was running Ubuntu 12.04, and most other questions related to this I've seen came from people with a different release from mine, which has led me to believe that that is the reason why the suggestions to those didn't solve my problem. I'm using Ubuntu 13.10

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• CodePlex Daily Summary for Tuesday, October 16, 2012

  CodePlex Daily Summary for Tuesday, October 16, 2012Popular ReleasesMagelia WebStore Open-source Ecommerce software: Magelia WebStore 2.1: Scheduler Import & Export feature UTC datetime and timezone support .net 4.5 and Visual Studio 2012 migration client magelia global refactoring nugget package https://nuget.org/packages/Magelia.Webstore.Client/2.1.254.1 burst optimisation burst time improvment (multithreading, index, ...) current burst is still active when a new burst is generating bugfixes version 2.1.254.1DevLib: 70038 binary dlls: 70038 binary dllsP1 Port monitoring with Netduino Plus: V0.2 Beta Netduino Plus P1 Port Monitoring: This is the stable beta release of the Netduino Plus P1 port monitoring. Please read the requirements on the Documentation page.JayData - The cross-platform HTML5 data-management library for JavaScript: JayData 1.2.2: JayData is a unified data access library for JavaScript to CRUD + Query data from different sources like OData, MongoDB, WebSQL, SqLite, HTML5 localStorage, Facebook or YQL. The library can be integrated with Knockout.js or Sencha Touch 2 and can be used on Node.js as well. See it in action in this 6 minutes video Sencha Touch 2 example app using JayData: Netflix browser. What's new in JayData 1.2.2 For detailed release notes check the release notes. Revitalized IndexedDB providerNow you c...VFPX: FoxcodePlus: FoxcodePlus - Visual Studio like extensions to Visual FoxPro IntelliSense.Droid Explorer: Droid Explorer 0.8.8.8 Beta: fixed the icon for packages on the desktop fixed the install dialog closing right when it starts removed the link to "set up the sdk for me" as this is no longer supported. fixed bug where the device selection dialog would show, even if there was only one device connected. fixed toolbar from having "gap" between other toolbar removed main menu items that do not have any menus Iveely Search Engine: Iveely Search Engine （0.3.0）: Iveely Search Engine?????????????，0.3.0????????，????????：??????。 ????????????"????“？???????,????????????。??0.3.0??????????？0.3.0????????，????。 ?????，????????????????，??????300????，?????????300?????????????????，?????????????????。????，??????????，???????，???????。???????IveelySE.Resource，???????????，???????????????????????，???????????。 ????????Iveely.config，??????IveelySE.Run.Task.exe，?????????http://127.0.0.1:8088/query=yourkeyword，??????。 ????，??? ??http://www.cnblogs.com/liufanping...Fiskalizacija za developere: FiskalizacijaDev 1.0: Prva verzija ovog projekta, još je uvijek oznacena kao BETA - ovo znaci da su naša testiranja prošla uspješno :) No, kako mi ne proizvodimo neki software za blagajne, tako sve ovo nije niti isprobano u "realnim" uvjetima - svaka je sugestija, primjedba ili prijava bug-a je dobrodošla. Za sve ovo koristite, molimo, Discussions ili Issue Tracker. U ovom trenutku runtime binary je raspoloživ kao Any CPU za .NET verzije 2.0. Javite ukoliko trebaju i verzije buildane za 32-bit/64-bit kao i za .N...Squiggle - A free open source LAN Messenger: Squiggle 3.2 (Development): NOTE: This is development release and not recommended for production use. This release is mainly for enabling extensibility and interoperability with other platforms. Support for plugins Support for extensions Communication layer and protocol is platform independent (ZeroMQ, ProtocolBuffers) Bug fixes New /invite command Edit the sent message Disable update check NOTE: This is development release and not recommended for production use.AcDown????? - AcDown Downloader Framework: AcDown????? v4.2: ??●AcDown??????????、??、??、???????。????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????，??????、????????????????。 ● AcDown??????????????????，????????????????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ???? 32??64? ???Linux ????(1)????????Windows XP???，????????.NET Framework 2.0???(x86)，?????"?????????"??? (2)???????????Linux???，????????Mono?? ??2...PHPExcel: PHPExcel 1.7.8: See Change Log for details of the new features and bugfixes included in this release, and methods that are now deprecated. Note changes to the PDF Writer: tcPDF is no longer bundled with PHPExcel, but should be installed separately if you wish to use that 3rd-Party library with PHPExcel. Alternatively, you can choose to use mPDF or DomPDF as PDF Rendering libraries instead: PHPExcel now provides a configurable wrapper allowing you a choice of PDF renderer. See the documentation, or the PDF s...DirectX Tool Kit: October 12, 2012: October 12, 2012 Added PrimitiveBatch for drawing user primitives Debug object names for all D3D resources (for PIX and debug layer leak reporting)Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.70: Fixed issue described in discussion #399087: variable references within case values weren't getting resolved.GoogleMap Control: GoogleMap Control 6.1: Some important bug fixes and couple of new features were added. There are no major changes to the sample website. Source code could be downloaded from the Source Code section selecting branch release-6.1. Thus just builds of GoogleMap Control are issued here in this release. Update 14.Oct.2012 - Client side access fixed NuGet Package GoogleMap Control 6.1 NuGet Package FeaturesBounds property to provide ability to create a map by center and bounds as well; Setting in markup <artem:Goog...mojoPortal: 2.3.9.3: see release notes on mojoportal.com http://www.mojoportal.com/mojoportal-2393-released Note that we have separate deployment packages for .NET 3.5 and .NET 4.0, but we recommend you to use .NET 4, we will probably drop support for .NET 3.5 once .NET 4.5 is available The deployment package downloads on this page are pre-compiled and ready for production deployment, they contain no C# source code and are not intended for use in Visual Studio. To download the source code see getting the lates...D3 Loot Tracker: 1.5.4: Fixed a bug where the server ip was not logged properly in the stats file.Captcha MVC: Captcha Mvc 2.1.2: v 2.1.2: Fixed problem with serialization. Made all classes from a namespace Jetbrains.Annotaions as the internal. Added autocomplete attribute and autocorrect attribute for captcha input element. Minor changes. Updated: I'm added an example for this question. v 2.1.1: Fixed problem with serialization. Minor changes. v 2.1: Added support for storing captcha in the session or cookie. See the updated example. Updated example. Minor changes. v 2.0.1: Added support for a partial ...DotNetNuke® Community Edition CMS: 06.02.04: Major Highlights Fixed issue where the module printing function was only visible to administrators Fixed issue where pane level skinning was being assigned to a default container for any content pane Fixed issue when using password aging and FB / Google authentication Fixed issue that was causing the DateEditControl to not load the assigned value Fixed issue that stopped additional profile properties to be displayed in the member directory after modifying the template Fixed er...Database View-plug-ins Programming Helper: Database View-plug-ins 1.3: V1.3 added feature: Metadata Deployment. The download package consists of deployment SQL scripts. Run every scripts of all subdirectories in order (sort by name). "VPI" is the default schema name in the manifest, it can be changed to other name according to your enterprise database policy. Current release is for Oracle version (SQL Server version will be released later).Advanced DataGridView with Excel-like auto filter: 1.0.0.0: ?????? ??????New ProjectsAerTHe: Simple, test project about EntityFramework, NUnit, etc.BalanceManagerApp: BalanceManagerAppC++ Debugger Visualizers for VS2012: C++ Debugger Visualizers for Boost, wxWidgets, TinyXML, TinyXML2ClipReader: A Text-To-Speach reader that reads from the clipboard. Reads any text you copy to the clipboard. Similar idea to ReadPlease. Coursework 2.0 UGC Site: University of Hertfordshire coursework project to develop a Web 2.0-style UGC website. DavesinitialcourseworkcalculatorinVS: Basic calculator for assignment 1DL_Assignment 1: This project forms Task 1 of Assignment 1 for 7COM0207. The requirement is that a user can enter 2 numbers and the sum of the numbes is displayed. Document Storage: This project is intended to act as a learning exercise for the participants. gillsassignment1: This is task 1 for assignment 1 which adds 2 numbers and displays the result.gillstestproject: This is my first little test.Iconator for Microsoft Dynamics CRM 2011: This application ease the customization of custom entities icons in Microsoft Dynamics CRM 2011.Infopath 2010 Web Signature Capture: A simple method of adding signature capture to InfoPath Browser enabled forms. KennyWorld: Kenny's blog based on BLogEngine.netMirus - Advanced Open Source Operating System: Mirus is a new, advanced, open source operating system written in C# using the Cosmos toolkit aiming for POSIX compatibility, ease of use, and innovation.Morgado Finance: Test of Finance ManagementMPF for Projects - Visual Studio 2012: A community project containing the source code and tests of a library for creating project system plug-ins for Visual Studio 2012 using C#.OpenWeb: OpenWeb project by Deigo Stefanon [*/*P1 Port monitoring with Netduino Plus: This program reads the Dutch electricity meter P1 port messages and publishes the information to Cosm and ThingSpeak for monitoring.Powerless View: Proof of concept application for hosting the Power View Silverlight application outside of a SharePoint and Reporting Services environment.RAM Drive: A Windows Service that copies an existing Virtual Hard Disk in memory, then mounts it as a disk giving the ability to use your RAM as a super-fast drive.Roderick Vella's Interactive Learning: Web Scripting and Content CreationSaveDouban: ?????????????????，????.NetFramework3.5?????ScriptEase for Microsoft Dynamics CRM 2011: Utility to synchronize your Microsoft Dynamics CRM 2011 JavaScripts with your files on your local hard-drive.T.REST: T.REST - a framework for testing REST ressourcesVisual Leak Detector Performance Test: Tests for Visual Leak Detector for Visual C++ 2008/2010/2012 [url:http://vld.codeplex.com/]???????: ????????????????。?????????????。 ??url??，??????

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• Looking for 2D Cross platform suggestions based on requirements specified

  - by MannyG

  I am an intermediate developer with minor experience on enterprise mobile applications for iphone, android and blackberry looking to build my first ever mobile game. I did a google search for some game dev forums and this popped up so I thought I would try posting here as I lack luck elsewhere. If you have ever heard of the game for the iphone and android platform entitled avatar fight then you will have an idea of the graphic capabilities I require. Basically the battles which are automated one sprite attacking another doing cool animations but all in 2d. My buddy and I have two motivations, one is to jump into mobile Dev as my experience is limited as is his so we would like some trending knowledge (html5 would be nice to learn) . The other is to make some money on the side, don't expect much but polishing the game and putting our all will hopefully reward us a bit. We have looked into corona engine, however a lot of people are saying it is limited in the graphics department, we are open to learning new languages like lua, c++, python etc. Others we have looked at include phonegap, rhomobile, unity, and the list goes on. I really have no idea what the pros and cons of these are but for a basic battle sequence and some mini games we want to chose the right one. Some more things that we will be doing include things like card games, side scrolling flying object based games, maybe fishing stuff. We want to start small with these minigames and work our way up to the idea we would like to implement in the future. We only want to work in 2D. So with these requirements please help me chose a platform to work on (cross platform is what we are ideally leaning towards). Please feel free to throw in some pieces of advice you may have for newbie game developers like myself too. Thank you for reading!

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• What's a nice explanation for pointers?

  - by Macneil

  In your own studies (on your own, or for a class) did you have an "ah ha" moment when you finally, really understood pointers? Do you have an explanation you use for beginner programmers that seems particularly effective? For example, when beginners first encounter pointers in C, they might just add &s and *s until it compiles (as I myself once did). Maybe it was a picture, or a really well motivated example, that made pointers "click" for you or your student. What was it, and what did you try before that didn't seem to work? Were any topics prerequisites (e.g. structs, or arrays)? In other words, what was necessary to understand the meaning of &s and *, when you could use them with confidence? Learning the syntax and terminology or the use cases isn't enough, at some point the idea needs to be internalized. Update: I really like the answers so far; please keep them coming. There are a lot of great perspectives here, but I think many are good explanations/slogans for ourselves after we've internalized the concept. I'm looking for the detailed contexts and circumstances when it dawned on you. For example: I only somewhat understood pointers syntactically in C. I heard two of my friends explaining pointers to another friend, who asked why a struct was passed with a pointer. The first friend talked about how it needed to be referenced and modified, but it was just a short comment from the other friend where it hit me: "It's also more efficient." Passing 4 bytes instead of 16 bytes was the final conceptual shift I needed.

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• How to define type-specific scripts when using a 'type object' programming pattern?

  - by Erik

  I am in the process of creating a game engine written in C++, using the C/C++ SQLite interface to achieve a 'type object' pattern. The process is largely similar to what is outlined here (Thank you Bob Nystrom for the great resource!). I have a generally defined Entity class that when a new object is created, data is taken from a SQLite database and then is pushed back into a pointer vector, which is then iterated through, calling update() for each object. All the ints, floats, strings are loaded in fine, but the script() member of Entity is proving an issue. It's not much fun having a bunch of stationary objects laying around my gameworld. The only solutions I've come up with so far are: Create a monolithic EntityScript class with member functions encompassing all game AI and then calling the corresponding script when iterating through the Entity vector. (Not ideal) Create bindings between C++ and a scripting language. This would seem to get the job done, but it feels like implementing this (given the potential memory overhead) and learning a new language is overkill for a small team (2-3 people) that know the entirety of the existing game engine. Can you suggest any possible alternatives? My ideal situation would be that to add content to the game, one would simply add a script file to the appropriate directory and append the SQLite database with all the object data. All that is required is to have a variety of integers and floats passed between both the engine and the script file.

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• Microsoft and innovation: IIF() method

  This Saturday I was watching a couple of eLearning videos from TrainSignal (thanks to the subscription I have with Pluralsight) on Querying Microsoft SQL Server 2012 (exam 70-461). 'Innovation' by Microsoft I kept myself busy learning 'new' things about Microsoft SQL Server 2012 and some best practices. It was incredible 'innovative' to see that there is an additional logic function called IIF() available now: Returns one of two values depending on the value of a logical expression. IIF(lExpression, eExpression1, eExpression2) Ups, my bad... That's actually taken from the syntax page of Visual FoxPro 9.0 SP 2. And tada, at least seven (7+) years later, there's the recent IIF() Transact-SQL version of that function: Returns one of two values, depending on whether the Boolean expression evaluates to true or false in SQL Server 2012. IIF ( boolean_expression, true_value, false_value ) Now, that's what I call innovation! But we all know what happened to Visual FoxPro... It has been reincarnated in form of Visual Studio LightSwitch (and SQL Server). Enough ranting... Happy coding!

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• Exploring various SharePoint blogs

  Quick summary on the activities I did yesterday - aka Day 4. Actually, it wasn't too much but I went through a number of articles on various blogs and online forums. Just for general purpose and to see whether my collection is going to have more entries. Well, so far I have to admit that the resources are good. Unfortunately, the blog of Doerfler is a little bit scarce. I went through it completely and there wasn't too much interesting information (yet) but this particular entry is worth mentioning: Wiederherstellen einer gelöschten Websitesammlung (How to restore a deleted site collection) Taking into consideration that there haven't been any new entries since November 2012 I would say that the blog is dormant. It would be great to have new entries in the future... My first (baby) steps in the following SharePoint communities are only scratching the surface, and I'm really looking forward to dig deeper. There seems to be a lot of valuable information available: SharePoint Community SharePointCommunity I think that I already found a true gem over there which is going to give me some extra time: How to begin learning SharePoint (for beginners) - Great overview and link collection Mark Jones. Interestingly, I already discovered a couple of his entries, like the video tutorials by Andrew Connell.

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• When creating an library published on CodePlex, how "bad" would it be for the unit-test projects to rely on commercial products?

  - by Lasse V. Karlsen

  I have started a project on CodePlex for a WebDAV server implementation for .NET, so that I can host a WebDAV server in my own programs. This is both a learning/research project (WebDAV + server portion) as well as a project I think I can have much fun with, both in terms of making it and using it. However, I see a need to do mocking of types here in order to unit-testing properly. For instance, I will be relying on HttpListener for the web server portion of the WebDAV server, and since this type has no interface, and is sealed, I cannot easily make mocks or stubs out of it. Unless I use something like TypeMock. So if I used TypeMock in the unit-test projects on this library, how bad would this be for potential users? The projects are made in C# 3.5 for .NET 3.5 and 4.0, and the project files was created with Visual Studio 2010 Professional. The actual class libraries you would end up referencing in your software would of course not be encumbered with anything remotely like this, only the unit-test libraries. What's your thoughts on this? As an example, I have in my old code-base, which is private, the ability to just initiate a WebDAV server with just this: var server = new WebDAVServer(); This constructs, and owns, a HttpListener instance internally, and I would like to verify through unit-tests that if I dispose of this server object, the internal listener is disposed of. If, on the other hand, I use the overload where I hand it a listener object, this object should not be disposed of. Short of exposing the internal listener object to the outside world, something I'm a bit loath to do, how can I in a good way ensure that the object was disposed of? With TypeMock I can mock away parts of this object even though it isn't accessed through interfaces. The alternative would be for me to wrap everything in wrapper classes, where I have complete control.

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