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  • Using NBuilder to mock up a data driven UI - Part 2

    In this article we will continue our discussion by filling out the implementation in our service class with some NBuilder code. Once we have the working service class in place we can then create a working UI (in the ASP.NET MVC project we created in the last article).

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  • Searching for anaglyph 3D games and apps

    - by koanhead
    Hey all, recently I installed the Minecraft .jar and played it. It's a bit of fun, but the coolest thing about it IMO has been the anaglyph 3D option. Yay, a ViewMaster game! Anyway, I'm looking for other anaglyph 3D games and apps. I understand that there's an anaglyph plugin for Compiz as well, although it apparently is an inactive project since 2008. An anaglyph interface for Blender would be severely awesome, right?

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  • apache tomcat with CDN

    - by user3215
    I've apache2,tomcat6 ubuntu servers running on port 80 with mod_jk setup hosting jsp pages. The developers are complaining that the pages are being rendered very slow when tried with IE browser and saying, at every refresh the images are reloading again and again which is not happening with other browsers. I'm given a hint CDNwhich I've no knowledge but I found in the google that cdn makes pages available on many server which improves the speed of the page being rendered. Anybody could tell me how could I make my pages available in cdn servers?

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  • 4.8M wasn't enough so we went for 5.055M tpmc with Unbreakable Enterprise Kernel r2 :-)

    - by wcoekaer
    We released a new set of benchmarks today. One is an updated tpc-c from a few months ago where we had just over 4.8M tpmc at $0.98 and we just updated it to go to 5.05M and $0.89. The other one is related to Java Middleware performance. You can find the press release here. Now, I don't want to talk about the actual relevance of the benchmark numbers, as I am not in the benchmark team. I want to talk about why these numbers and these efforts, unrelated to what they mean to your workload, matter to customers. The actual benchmark effort is a very big, long, expensive undertaking where many groups work together as a big virtual team. Having the virtual team be within a single company of course helps tremendously... We already start with a very big server setup with tons of storage, many disks, lots of ram, lots of cpu's, cores, threads, large database setups. Getting the whole setup going to start tuning, by itself, is no easy task, but then the real fun starts with tuning the system for optimal performance -and- stability. A benchmark is not just revving an engine at high rpm, it's actually hitting the circuit. The tests require long runs, require surviving availability tests, such as surviving crashes -and- recovery under load. In the TPC-C example, the x4800 system had 4TB ram, 160 threads (8 sockets, hyperthreaded, 10 cores/socket), tons of storage attached, tons of luns visible to the OS. flash storage, non flash storage... many things at high scale that all have to be perfectly synchronized. During this process, we find bugs, we fix bugs, we find performance issues, we fix performance issues, we find interesting potential features to investigate for the future, we start new development projects for future releases and all this goes back into the products. As more and more customers, for Oracle Linux, are running larger and larger, faster and faster, more mission critical, higher available databases..., these things are just absolutely critical. Unrelated to what anyone's specific opinion is about tpc-c or tpc-h or specjenterprise etc, there is a ton of effort that the customer benefits from. All this work makes Oracle Linux and/or Oracle Solaris better platforms. Whether it's faster, more stable, more scalable, more resilient. It helps. Another point that I always like to re-iterate around UEK and UEK2 : we have our kernel source git repository online. Complete changelog of the mainline kernel, and our changes, easy to pull, easy to dissect, easy to know what went in when, why and where. No need to go log into a website and manually click through pages to hopefully discover changes or patches. No need to untar 2 tar balls and run a diff.

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  • Superb post - What if Visual Studio had Achievements?

    - by Eric Nelson
    This post is simple superb – What if Visual Studio had Achievements :-) Although maybe you need to a developer who also has an Xbox to fully understand how good it is. My favourites: Shotgun Debugging – 5 Consecutive Solution Rebuilds with a single character change The Architect – Created 25 Interfaces in a single project The Multitasker – Have more than 50 source files open at the same time Every Option Considered – Created an enum with more than 30 values Thanks to Dominic for highlighting it to me!

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  • Proposal from OLPC Paraguay on how to manage Sugar or other educational software

    <b>Stop:</b> "The project to deliver One Laptop Per Child (OLPC) for educational purpose in developing countries is doing great in Paraguay. According to developer Bernie Innocenti, this success comes from a way to manage the development of the Sugar educational software that other countries (or any other similar projects, see for example the Teachermate or the italian JumpPC) could and should imitate."

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  • Microsoft, jQuery, and Templating

    - by Latest Microsoft Blogs
    About two months ago, John Resig and I met at Café Algiers in Harvard square to discuss how Microsoft can contribute to the jQuery project. Today, Scott Guthrie announced in his second-day MIX keynote that Microsoft is throwing its weight behind jQuery Read More......(read more)

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  • SQL SERVER Find Most Expensive Queries Using DMV

    The title of this post is what I can express here for this quick blog post. I was asked in recent query tuning consultation project, if I can share my script which I use to figure out which is the most expensive queries are running on SQL Server. This script is very basic and very [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Ecommerce Websites Development Services

    A commercial website is deemed as a failure these days if it does not have proper ecommerce solutions deployed in various places. Since an organization makes money through the products that are purchased on the website, it becomes imperative for the website to have the right ecommerce solutions fixed so that the buyer who comes to the portal can buy the product easily and pay through card. The solutions contain features that help the website project itself quite commercially and also make it look very professional.

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  • New Upgrade Technical Reference for SQL Server 2008 R2

    - by Greg Low
    Hi Folks, A year or two back, I was involved in a project with my colleagues from SolidQ (led by Ron Talmage) to construct an Upgrade Technical Reference for SQL Server 2008. It seemed to be well received. We've updated it now to SQL Server 2008 R2 and it's just been published. You'll find it on this web site: http://www.microsoft.com/sqlserver/en/us/product-info/why-upgrade.aspx You'll need to click on the Upgrade Guide link towards the middle of the RHS under the "Why Upgrade" whitepaper. Enjoy!...(read more)

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  • Deciding between obj->func() and func(obj)

    - by GSto
    I was thinking about this when I was starting to set up some code for a new project: are there any rules of thumb for when a method should be part of an object, and when it should be a stand alone function that takes an object as a parameter? EDIT: as pointed out in a comment, this can depend on language. I was working in C++ when it came to mind, though I'm this is an issue across a number of languages (and would still love to see answers that pertain to them).

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  • Week in Geek: Free Version of Google Apps for Business has been Discontinued

    - by Asian Angel
    This week’s edition of WIG is filled with news link coverage on topics such as Android’s ‘Google Now’ services are headed for Chrome, Microsoft is ready to push Hotmail users to Outlook.com, a 25 GPU setup devours password hashes at up to 348 billion per second, and more. How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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  • How does Github calculate language percentage in a repo?

    - by John Isaacks
    I have a repo with Ruby and PHP code in it. Github says my repo is 74.8% PHP and 25.2% Ruby I do not understand how this can be. When I compare the 2 languages in my project: # Count how many files: # Ruby ls | grep ".*\.rb" | wc -l # returns 10 #PHP ls | grep ".*\.php" | wc -l # returns 1 # Count how many lines, words, chars: # Ruby cat *.rb | wc # returns 229, 812, 5303 # PHP cat *.php | wc # returns 102, 473, 2760 Ruby always seems to have more. Am I missing something?

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  • Which programming language to get into?

    - by user602479
    I'm ending my third term in a few weeks so I have some spare time coming up. I'd like to spend it seriously digging into programming. My problem: I'm not sure which language to begin with. Just to be clear, I don't want to start a language-y-compared-to-language-z discussion. There are a some other issues that play a major role. In my 5th term I'm going to be participating in a major practical course which will include either Java or C programming. It will take a lot of time and energy, as I found out while talking to a few students who passed the final exams (only 15% pass on their first try). Which practical course I will take is randomly decided. My skills so far are the absolute basics of Java and C programming. I know the different data types and how to handle them, objects, pointers, thread programming, etc. All of that is on a very low level, though. My question now is, what language should I start seriously practicing? Java: I did my first GUIs with this language. I'm familiar with Eclipse but I need a project to work on (which I don't have) to really keep me pushing. Besides that, I don't think it would help me if I have to do C in a year. C: As with Java, I can't think of a personal project to keep me working and keep me interested in programming. If I get assigned to Java in a year, this wouldn't give me any advantages either, would it? (No objects, etc.) Objective-C: I recently came up with this idea. I have a Mac; I'm not really familiar with Xcode but I have one or two personal projects I'd like to work on. Further, I would be working with objects (as in Java) and C language constructs which would both be great for this practical course in a year. What do you think I should begin with? Should I just stick to Java and hope for the best, force myself through C or start (nearly) completely from the beginning with Objective C? Maybe you folks could give me some good advice that would stop me from switching from one language to the next?

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  • Debugging a Broken Stylesheet: CSS Background Disappears when Scroll Off Bottom of Screen

    - by nannette
    I recently worked on an existing project where we decided to add a background to the site. Whether this is a background color or background image, the same problem occured. The problem was that the background loaded fine in the screen. But when the user used the scrollbar to scroll below the bottom edge of the screen, the background immediately turned white. The footer panel was colorized as desired, but the background just disappeared. I'm going to provide my debugging steps so you can learn how...(read more)

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  • ANTS CLR and Memory Profiler In Depth Review (Part 2 of 2 &ndash; Memory Profiler)

    - by ToStringTheory
    One of the things that people might not know about me, is my obsession to make my code as efficient as possible. Many people might not realize how much of a task or undertaking that this might be, but it is surely a task as monumental as climbing Mount Everest, except this time it is a challenge for the mind… In trying to make code efficient, there are many different factors that play a part – size of project or solution, tiers, language used, experience and training of the programmer, technologies used, maintainability of the code – the list can go on for quite some time. I spend quite a bit of time when developing trying to determine what is the best way to implement a feature to accomplish the efficiency that I look to achieve. One program that I have recently come to learn about – Red Gate ANTS Performance (CLR) and Memory profiler gives me tools to accomplish that job more efficiently as well. In this review, I am going to cover some of the features of the ANTS memory profiler set by compiling some hideous example code to test against. Notice As a member of the Geeks With Blogs Influencers program, one of the perks is the ability to review products, in exchange for a free license to the program. I have not let this affect my opinions of the product in any way, and Red Gate nor Geeks With Blogs has tried to influence my opinion regarding this product in any way. Introduction – Part 2 In my last post, I reviewed the feature packed Red Gate ANTS Performance Profiler.  Separate from the Red Gate Performance Profiler is the Red Gate ANTS Memory Profiler – a simple, easy to use utility for checking how your application is handling memory management…  A tool that I wish I had had many times in the past.  This post will be focusing on the ANTS Memory Profiler and its tool set. The memory profiler has a large assortment of features just like the Performance Profiler, with the new session looking nearly exactly alike: ANTS Memory Profiler Memory profiling is not something that I have to do very often…  In the past, the few cases I’ve had to find a memory leak in an application I have usually just had to trace the code of the operations being performed to look for oddities…  Sadly, I have come across more undisposed/non-using’ed IDisposable objects, usually from ADO.Net than I would like to ever see.  Support is not fun, however using ANTS Memory Profiler makes this task easier.  For this round of testing, I am going to use the same code from my previous example, using the WPF application. This time, I will choose the ‘Profile Memory’ option from the ANTS menu in Visual Studio, which launches the solution in its currently configured state/start-up project, and then launches the ANTS Memory Profiler to help.  It prepopulates all of the fields with the current project information, and all I have to do is select the ‘Start Profiling’ option. When the window comes up, it is actually quite barren, just giving ideas on how to work the profiler.  You start by getting to the point in your application that you want to profile, and then taking a ‘Memory Snapshot’.  This performs a full garbage collection, and snapshots the managed heap.  Using the same WPF app as before, I will go ahead and take a snapshot now. As you can see, ANTS is already giving me lots of information regarding the snapshot, however this is just a snapshot.  The whole point of the profiler is to perform an action, usually one where a memory problem is being noticed, and then take another snapshot and perform a diff between them to see what has changed.  I am going to go ahead and generate 5000 primes, and then take another snapshot: As you can see, ANTS is already giving me a lot of new information about this snapshot compared to the last.  Information such as difference in memory usage, fragmentation, class usage, etc…  If you take more snapshots, you can use the dropdown at the top to set your actual comparison snapshots. If you beneath the timeline, you will see a breadcrumb trail showing how best to approach profiling memory using ANTS.  When you first do the comparison, you start on the Summary screen.  You can either use the charts at the bottom, or switch to the class list screen to get to the next step.  Here is the class list screen: As you can see, it lists information about all of the instances between the snapshots, as well as at the bottom giving you a way to filter by telling ANTS what your problem is.  I am going to go ahead and select the Int16[] to look at the Instance Categorizer Using the instance categorizer, you can travel backwards to see where all of the instances are coming from.  It may be hard to see in this image, but hopefully the lightbox (click on it) will help: I can see that all of these instances are rooted to the application through the UI TextBlock control.  This image will probably be even harder to see, however using the ‘Instance Retention Graph’, you can trace an objects memory inheritance up the chain to see its roots as well.  This is a simple example, as this is simply a known element.  Usually you would be profiling an actual problem, and comparing those differences.  I know in the past, I have spotted a problem where a new context was created per page load, and it was rooted into the application through an event.  As the application began to grow, performance and reliability problems started to emerge.  A tool like this would have been a great way to identify the problem quickly. Overview Overall, I think that the Red Gate ANTS Memory Profiler is a great utility for debugging those pesky leaks.  3 Biggest Pros: Easy to use interface with lots of options for configuring profiling session Intuitive and helpful interface for drilling down from summary, to instance, to root graphs ANTS provides an API for controlling the profiler. Not many options, but still helpful. 2 Biggest Cons: Inability to automatically snapshot the memory by interval Lack of complete integration with Visual Studio via an extension panel Ratings Ease of Use (9/10) – I really do believe that they have brought simplicity to the once difficult task of memory profiling.  I especially liked how it stepped you further into the drilldown by directing you towards the best options. Effectiveness (10/10) – I believe that the profiler does EXACTLY what it purports to do.  Features (7/10) – A really great set of features all around in the application, however, I would like to see some ability for automatically triggering snapshots based on intervals or framework level items such as events. Customer Service (10/10) – My entire experience with Red Gate personnel has been nothing but good.  their people are friendly, helpful, and happy! UI / UX (9/10) – The interface is very easy to get around, and all of the options are easy to find.  With a little bit of poking around, you’ll be optimizing Hello World in no time flat! Overall (9/10) – Overall, I am happy with the Memory Profiler and its features, as well as with the service I received when working with the Red Gate personnel.  Thank you for reading up to here, or skipping ahead – I told you it would be shorter!  Please, if you do try the product, drop me a message and let me know what you think!  I would love to hear any opinions you may have on the product. Code Feel free to download the code I used above – download via DropBox

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  • What game systems exist which uses camera input?

    - by Marc Pilgaard
    The group and I is in the middle of a semester project where we are currently researching on which game systems are using camera as input or as an interactive medium? We would like some help listing some of the game systems which uses camera input, as it seems hard to find other examples. Currently we know that webcam browser games uses camera input (Newgrounds webcam games), as well as the xbox kinect. I know this questions seems rather vague, though I still hope some people is capable of helping.

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  • OData &ndash; The easiest service I can create

    - by Jon Dalberg
    I wanted to create an OData service with the least amount of code so I fired up Visual Studio and got cracking. I decided to serve up a list of naughty words and make them read-only. Create a new web project. I created an empty MVC 2 application but MVC is not required for OData. Add a new WCF Data Service to the project. I named mine NastyWords.svc since I’m serving up a list of nasty words. Add a class to expose via the service: NastyWord 1: [DataServiceKey("Word")] 2: public class NastyWord 3: { 4: public string Word { get; set; } 5: }   I need to be able to uniquely identify instances of NastyWords for the DataService so I used the DataServiceKey attribute with the “Word” property as the key. I could have added an “ID” property which would have uniquely identified them and would then not need the “DataServiceKey” attribute because the DataService would apply some reflection and heuristics to guess at which property would be the unique identifier. However, the words themselves are unique so adding an “ID” property would be redundantly repetitive. Then I created a data source to expose my NastyWord objects to the service. This is just a simple class with IQueryable<T> properties exposing the entities for my service: 1: public class NastyWordsDataSource 2: { 3: private static IList<NastyWord> words = new List<NastyWord> 4: { 5: new NastyWord{ Word="crap"}, 6: new NastyWord{ Word="darn"}, 7: new NastyWord{ Word="hell"}, 8: new NastyWord{ Word="shucks"} 9: }; 10:   11: public NastyWordsDataSource() 12: { 13: NastyWords = words.AsQueryable(); 14: } 15:   16: public IQueryable<NastyWord> NastyWords { get; private set; } 17: }   Now I can go to the NastyWords.svc class and tell it which data source to use and which entities to expose: 1: public class NastyWords : DataService<NastyWordsDataSource> 2: { 3: // This method is called only once to initialize service-wide policies. 4: public static void InitializeService(DataServiceConfiguration config) 5: { 6: config.SetEntitySetAccessRule("*", EntitySetRights.AllRead); 7: config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; 8: } 9: }   Compile and browse to my NastWords.svc and weep with joy Now I can query my service just like any other OData service. Next time, I’ll modify this service to allow updates to sent so I can build up my list of nasty words. Enjoy!

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  • What's with the aversion to documentation in the industry?

    - by omouse
    There seems to be an aversion to writing even the most basic documentation. Our project READMEs are relatively bare. There aren't even updated lists of dependencies in the docs. Is there something I'm unaware of in the industry that makes programmers dislike writing documentation? I can type out paragraphs of docs if needed, so why are others so averse to it? More importantly, how do I convince them that writing docs will save us time and frustration in the future?

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