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  • I need a step-by-step Sample Programming Tutorial (book or website)

    - by Albert Y.
    Can anyone recommend a step-by-step programming tutorial (either book or website) where they walk you through designing a complex program and explain what they are coding & why? Language doesn't matter, but preferably something like Java, Python, C++, or C and not web based. I am a new programmer and I am looking for good examples that will teach me how to program something more complex than simple programs given in programming textbooks.

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  • IIS 7 Url Rewrite Rules for SEO and Security

    - by The Official Microsoft IIS Site
    Before IIS 7, if you wanted to do url rewriting with IIS 6 you had to use a 3rd party program such as ISAPI Rewrite by helicontech.com. This was a good program but it wasn’t native to IIS and there were limitations such as a site hosting more than 1 domain with different applications running. With IIS 7 url rewriting and redirecting has never been easier thanks to Microsoft’s Url Rewrite module. The rewriting is done by rules which are specified in the web.config under <system.webserver>...(read more)

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  • The Best Free Programs for Using Virtual Desktops in Windows

    - by Lori Kaufman
    If you often open a lot of applications at once, a virtual desktop program can help you keep all those windows on your desktop organized. A virtual desktop program allows you to put open applications into separate virtual desktops, cutting down on your desktop clutter. We’ve collected links to and information about several free virtual desktop managers you can use to organize your Windows desktop. 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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  • Delegate performance of Roslyn Sept 2012 CTP is impressive

    - by dotneteer
    I wanted to dynamically compile some delegates using Roslyn. I came across this article by Piotr Sowa. The article shows that the delegate compiled with Roslyn CTP was not very fast. Since the article was written using the Roslyn June 2012, I decided to give Sept 2012 CTP a try. There are significant changes in Roslyn Sept 2012 CTP in both C# syntax supported as well as API. I found Anoop Madhisidanan’s article that has an example of the new API. With that, I was able to put together a comparison. In my test, the Roslyn compiled delegate is as fast as C# (VS 2012) compiled delegate. See the source code below and give it a try. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using Roslyn.Compilers; using Roslyn.Scripting.CSharp; using Roslyn.Scripting; namespace RoslynTest { class Program { public Func del; static void Main(string[] args) { Stopwatch stopWatch = new Stopwatch(); Program p = new Program(); p.SetupDel(); //Comment out this line and uncomment the next line to compare //p.SetupScript(); stopWatch.Start(); int result = DoWork(p.del); stopWatch.Stop(); Console.WriteLine(result); Console.WriteLine("Time elapsed {0}", stopWatch.ElapsedMilliseconds); Console.Read(); } private void SetupDel() { del = (s, i) => ++s; } private void SetupScript() { //Create the script engine //Script engine constructor parameters go changed var engine=new ScriptEngine(); //Let us use engine's Addreference for adding the required //assemblies new[] { typeof (Console).Assembly, typeof (Program).Assembly, typeof (IEnumerable<>).Assembly, typeof (IQueryable).Assembly }.ToList().ForEach(asm => engine.AddReference(asm)); new[] { "System", "System.Linq", "System.Collections", "System.Collections.Generic" }.ToList().ForEach(ns=>engine.ImportNamespace(ns)); //Now, you need to create a session using engine's CreateSession method, //which can be seeded with a host object var session = engine.CreateSession(); var submission = session.CompileSubmission>("new Func((s, i) => ++s)"); del = submission.Execute(); //- See more at: http://www.amazedsaint.com/2012/09/roslyn-september-ctp-2012-overview-api.html#sthash.1VutrWiW.dpuf } private static int DoWork(Func del) { int result = Enumerable.Range(1, 1000000).Aggregate(del); return result; } } }  Since Roslyn Sept 2012 CTP is already over a year old, I cannot wait to see a new version coming out.

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  • Diagnosing ADF Mobile iOS deployment problems

    - by Chris Muir
    From time to time I encounter customers who have taken possession of a brand new Apple Mac, have that excited "I've just spent more on a computer then I ever wanted to but it's okay" crazy gleam in their eye, but on pre-loading all the necessary software for Oracle's ADF Mobile to start their mobile campaign, following Oracle's setup instructions and deploying their first app to Apple's XCode iPhone Simulator they hit this error message in the JDeveloper Log-Deployment window: [01:36:46 PM] Deployment cancelled. [01:36:46 PM] ----  Deployment incomplete  ----. [01:36:46 PM] Failed to build the iOS application bundle. [01:36:46 PM] Deployment failed due to one or more errors returned by '/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild'.  The following is a summary of the returned error(s): Command-line execution failed (Return code: 69) "Oh, return code 69, I know that well" I hear you say.  Admittedly the error code is less than useful besides drawing some titters from the peanut gallery. Before explaining what's gone wrong, I think it's useful to teach customers how to diagnose these issues themselves.  When ADF Mobile commences a deployment, be it to Apple's iOS or Google's Android platforms, JDeveloper and ADF Mobile do a good job in the Log window of showing you what the deployment process entails.  In the case of deploying to iOS the log window will literally include the XCode commands executed to complete the deployment cycle. As example here's the log output that was produced before the error message was raised.... take the opportunity to read this line by line and note the command line calls highlighted in blue: (Note some of the following lines have been split over multiple lines to suit reading on this blog, each original line is preceded by a timestamp. Ensure to check the exact commands from JDev) [01:36:33 PM] Target platform is (iOS). [01:36:33 PM] Beginning deployment of ADF Mobile application 'LayoutDemo' to iOS using profile 'IOS_MOBILE_NATIVE_archive1'. [01:36:34 PM] Command-line executed: [/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild, -version] [01:36:34 PM] Command-line execution succeeded. [01:36:34 PM] Running dependency analysis... [01:36:34 PM] Building... [01:36:34 PM] Deploying 3 profiles... [01:36:35 PM] Wrote Archive Module to /Users/chris/fmw/jdeveloper/jdev/extensions/ oracle.adf.mobile/Samples/PublicSamples/LayoutDemo/ApplicationController/ deploy/ApplicationController.jar [01:36:35 PM] WARNING: No Resource Catalog enabled ADF components found to package [01:36:36 PM] Wrote Archive Module to /Users/chris/fmw/jdeveloper/jdev/extensions/ oracle.adf.mobile/Samples/PublicSamples/LayoutDemo/ViewController/ deploy/ViewController.jar [01:36:36 PM] Verifying existence of the .adf source directory of the ADF Mobile application... [01:36:36 PM] Verifying Application Controller project exists... [01:36:36 PM] Verifying application dependencies... [01:36:36 PM] The application may not function correctly because the following dependent libraries are missing: /Users/chris/jdev/jdeveloper/jdeveloper/jdev/extensions/oracle.adf.mobile/ lib/adfmf.springboard.jar [01:36:36 PM] Verifying project dependencies... [01:36:36 PM] Validating application XML files... [01:36:36 PM] Validating XML files in project ApplicationController... [01:36:36 PM] Validating XML files in project ViewController... [01:36:40 PM] Copying common javascript files... [01:36:41 PM] Copying FARs to the ADF Mobile Framework application... [01:36:41 PM] Extracting Feature Archive file, "ApplicationController.jar" to deployment folder, "ApplicationController". [01:36:42 PM] Extracting Feature Archive file, "ViewController.jar" to deployment folder, "ViewController". [01:36:42 PM] Deploying skinning files... [01:36:43 PM] Copying the CVM SDK files built for the x86 processor... [01:36:43 PM] Copying the CVM JDK files built for the x86 processor... [01:36:43 PM] Command-line executed: [cp, -R, -p, /Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/iOS/jvmti/x86/, /Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/ Samples/PublicSamples/ LayoutDemo/deploy/IOS_MOBILE_NATIVE_archive1/temporary_xcode_project/lib] [01:36:43 PM] Command-line execution succeeded. [01:36:43 PM] Command-line executed: [cp, -R, -p, /Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/iOS/jvmti/jar/, /Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/Samples/ PublicSamples/LayoutDemo/deploy/IOS_MOBILE_NATIVE_archive1/ temporary_xcode_project/lib] [01:36:43 PM] Command-line execution succeeded. [01:36:43 PM] Copying security related files to the ADF Mobile Framework application... [01:36:44 PM] Command-line executed from path: /Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/Samples/ PublicSamples/LayoutDemo/deploy/IOS_MOBILE_NATIVE_archive1/temporary_xcode_project/ [01:36:44 PM] Command-line executed: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild clean install -configuration Debug -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/ Developer/SDKs/iPhoneSimulator6.1.sdk DSTROOT=/Users/chris/fmw/jdeveloper/jdev/extensions/oracle.adf.mobile/Samples/ PublicSamples/LayoutDemo/deploy/IOS_MOBILE_NATIVE_archive1/Destination_Root/ IPHONEOS_DEPLOYMENT_TARGET=5.0 TARGETED_DEVICE_FAMILY=1,2 PRODUCT_NAME=LayoutDemo ADD_SETTINGS_BUNDLE=NO As you can see when we move from JDeveloper undertaking its work, it then passes the code off in the last few lines for Apple's XCode to assemble and deploy the required .ipa file.  From the original error message which followed this complaining about xcodebuild failing with return code 69, we can quickly see the exact command line used to call xcodebuild. As this is the exact command line call with all its options, you're free to open a Terminal window in Mac OSX and execute the same command by simply copying and pasting the command line. And via this you'll then find out what return code actually 69 means.  Unfortunately it's not that exciting. For Macs that have just been installed and configured with XCode, XCode (and for that matter iTunes) which is required by ADF Mobile to deploy must have been run at least once before hand on your brand new Mac (to be clear that's once ever, not once every restart). On doing so you will be presented with a license agreement from Apple that you must accept. Only once you've done this will the command line calls work.  They're currently failing as you haven't accepted the legal terms and conditions. (arguably you an also accept the terms and conditions from the command line too, but ADF Mobile cannot do this on your behalf, so it's just easier to open the tools and confirm the legal requirements that way). Putting aside the error code and its meaning, watching the log window, watching what commands are executed, learning what they do, this will assist you to diagnose issues yourself and solve these sort of issues more relatively quickly.  From my perspective as an Oracle Product Manager, it allows me to say "this is the stuff you don't need to worry about when you use ADF Mobile when it's configured correctly" .... as you can see my salesman qualities shine through. For anyone who is happily using ADF Mobile on a Mac and wondering why you didn't hit these issues, it's quite likely that you already accepted the license conditions before deploying via ADF Mobile.  For instance, though I'm not a fan of iTunes itself, iTunes was one of the first things I loaded on my Mac to access my Justin Bieber albums. Image courtesy of winnond / FreeDigitalPhotos.net

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  • Visual Studio 10 crashed when tried to open one of solutions

    - by Michael Freidgeim
    Visual Studio 10 crashed when I tried to open  one of my solutions. Closing Visual Studio and rebooting the machine didn’t help.The error message that was logged(see below), didn’t give any useful ideas.Finally It was fixed after I’ve deleted MySolution.suo file, which was quite big, and also Resharper folders.Log Name:      ApplicationSource:        Application ErrorEvent ID:      1000Task Category: (100)Level:         ErrorKeywords:      ClassicUser:          N/ADescription:Faulting application name: devenv.exe, version: 10.0.40219.1, time stamp: 0x4d5f2a73Faulting module name: msenv.dll, version: 10.0.40219.1, time stamp: 0x4d5f2d48Exception code: 0xc0000005Fault offset: 0x00355770Faulting process id: 0x1dc0Faulting application start time: 0x01cd1836888599f4Faulting application path: C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exeFaulting module path: c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\msenv.dllReport Id: 9924b2f9-844e-11e1-bc19-782bcba513eaEvent Xml:<Event >  <System>    <Provider Name="Application Error" />    <EventID Qualifiers="0">1000</EventID>    <Level>2</Level>    <Task>100</Task>    <Keywords>0x80000000000000</Keywords>    <TimeCreated SystemTime="2012-04-12T03:21:31.000000000Z" />    <EventRecordID>401998</EventRecordID>    <Channel>Application</Channel>    <Security />  </System>  <EventData>    <Data>devenv.exe</Data>    <Data>10.0.40219.1</Data>    <Data>4d5f2a73</Data>    <Data>msenv.dll</Data>    <Data>10.0.40219.1</Data>    <Data>4d5f2d48</Data>    <Data>c0000005</Data>    <Data>00355770</Data>    <Data>1dc0</Data>    <Data>01cd1836888599f4</Data>    <Data>C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe</Data>    <Data>c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\msenv.dll</Data>    <Data>9924b2f9-844e-11e1-bc19-782bcba513ea</Data>  </EventData></Event>v

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  • openssl/rand.h header file not found

    - by Arun Reddy Kandoor
    I have installed libssl-dev package but that did not install the include files. How do I get the openssl include files? Appreciate your help. Checking for program g++ or c++ : /usr/bin/g++ Checking for program cpp : /usr/bin/cpp Checking for program ar : /usr/bin/ar Checking for program ranlib : /usr/bin/ranlib Checking for g++ : ok Checking for node path : ok /usr/bin/node Checking for node prefix : ok /usr Checking for header openssl/rand.h : not found /home/arun/Documents/webserver/node_modules/bcrypt/wscript:30: error: the configuration failed (see '/home/arun/Documents/webserver/node_modules/bcrypt/build/config.log') npm ERR! error installing [email protected] npm ERR! [email protected] preinstall: `node-waf clean || (exit 0); node-waf configure build` npm ERR! `sh "-c" "node-waf clean || (exit 0); node-waf configure build"` failed with 1 npm ERR! npm ERR! Failed at the [email protected] preinstall script. npm ERR! This is most likely a problem with the bcrypt package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node-waf clean || (exit 0); node-waf configure build npm ERR! You can get their info via: npm ERR! npm owner ls bcrypt npm ERR! There is likely additional logging output above. npm ERR! npm ERR! System Linux 3.8.0-32-generic npm ERR! command "node" "/usr/bin/npm" "install" npm ERR! cwd /home/arun/Documents/webserver npm ERR! node -v v0.6.12 npm ERR! npm -v 1.1.4 npm ERR! code ELIFECYCLE npm ERR! message [email protected] preinstall: `node-waf clean || (exit 0); node-waf configure build` npm ERR! message `sh "-c" "node-waf clean || (exit 0); node-waf configure build"` failed with 1 npm ERR! errno {} npm ERR! npm ERR! Additional logging details can be found in: npm ERR! /home/arun/Documents/webserver/npm-debug.log npm not ok

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  • access localhost from other PC

    - by user109694
    I'm fresher for ubuntu 12.04.., I just created a simple program called login.php and i would like to run this prog from anther PC that not in my LAN. I had localhost in my system., I'm using apache2.0 and php5. My program is located at var/www/login.php When ever i'm trying to open it from others PC(not in my network) using IP it shoes OOPS., What can i do to open my page from another PC using IP address.

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  • Detecting if someone is in a room in your house and sending you an email.

    - by mbcrump
    Let me setup this scenario: You are selling your house. You have small children. (Possibly 2 rug rats or more) The real estate company calls and says they have a showing for your house between the hours of 3pm-6pm. You have to keep the children occupied. You realize this is the 5th time you have shown your house this week. What is a programmer to do?……Setup a webcam, find a motion detection software that has support to launch a program and of course, Visual Studio 2010. First, comes the tools Some sort of webcam, I chose the WinBook because a friend of mine loaned it to me. It is a basic USB2.0 camera that supports 640x480 without software.  Next up was find webcam software that supports launching a program. WebcamXP support this. VS 2010 Console Application. A cell phone that you can check your email. You may be asking, why write code to send the email when a lot of commercial software motion detection packages include that as base functionality. Well, first it cost money and second I don’t want the picture of the person as that probably invades privacy and as a future buyer, I don’t want someone recording me in their house. Now onto the show... First, the code part. We are going to create a VS2010 or whatever version you have installed and use the following code snippet. Code Snippet using System; using System.Net.Mail; using System.Net;     namespace MotionDetectionEmailer {     class Program     {         static void Main(string[] args)         {             try             {                 MailMessage m = new MailMessage                    ("[email protected]",                     "[email protected]",                     "Motion Detected at " + DateTime.Now,                     "Someone is in the downstairs basement.");                 SmtpClient client = new SmtpClient("smtp.charter.net");                 client.Credentials = new NetworkCredential("mbcrump", "NOTTELLINGYOU");                 client.Send(m);             }               catch (SmtpException ex)             {                 Console.WriteLine("Who cares?? " + ex.ToString());             }         }       } } Second, Download and install wecamxp and select the option to launch an external program and you are finished. Now, when you are at MCDonalds and can check your email on your phone, you will see when they entered the house and you can go back home without waiting the full 3 hours. --- NICE!

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  • Usability enhancements for Users and Administrators in 11gR2 with Rex Thexton from PwC

    - by Darin Pendergraft
    In addition to the inviting customers to participate in the 11gR2 BETA program, a select number of partners were invited as well.  Rex Thexton, Managing Director of PwC's Advisory/Technology practice and his team were part of the BETA program.  I caught up with Rex recently to ask him about the new features that he liked most in the latest release.  Listen to our interview here:  podcast link

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  • Free training at Northwest Cadence

    - by Martin Hinshelwood
    Even though I have only been at Northwest Cadence for a short time I have already done so much. What I really wanted to do was let you guys know about a bunch of FREE training that NWC offers. These sessions are at a fantastic time for the UK as 9am PST (Seattle time) is around 5pm GMT. Its a fantastic way to finish off your Fridays and with the lack of love for developers in the UK set to continue I would love some of you guys to get some from the US instead. There are really two offerings. The first is something called Coffee talks that take you through an hours worth of detail in a specific category. Coffee Talks These coffee talks have some superb topics and you can get excellent interaction with the presenter as they are kind of informal. Date Day Time Topic Register Here 01/04/11 Tuesday 8:30AM – 9:30AM PST Real World Business and Technical Benefits of ALM with TFS 2010 150656 01/28/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152810 02/11/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152844 02/25/11 Friday 2:00PM - 3:00PM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152816 03/11/11 Friday 9:00AM - 10:00AM PST Lab Manager The Ultimate “No More No Repro” Tool 152809 03/25/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152838 04/08/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152846 04/22/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152839 05/06/11 Friday 2:00PM - 3:00PM PST Real World Business and Technical Benefits of ALM with TFS 2010 150657 05/20/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152842 06/03/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152847 06/17/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152843   ALM Training Engagement Program Microsoft has released a new program to bring free Visual Studio 2010 Training Sessions to select customers on Microsoft Visual Studio products and how Application Lifecycle Management (ALM) solutions can help drive greater business impact. For more details on this program, please see the process chart below.  To get started send an email to us; This training is paid for by Microsoft and you would need to commit to 4 sessions in order to get accepted into the program. So these have more hoops to jump through to get them, but the content is much more formal and centres around adoption.

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  • SPSS launcher for Unity

    - by user67157
    I have "SPSS 20 for Linux" statistical analysis program installed under /opt/IBM directory. I can run it via terminal entering the command line with /opt/IBM, and it runs without any problems. When the program window opens, I go to the launcher and right-click on its icon to lock it there, but after closing it, the icon becomes useless. When I click on it, nothing happens. I tried to ceate a launcher for it, but there is no use again.

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  • Apache 'You don't have permission to access / on this server'

    - by Dying
    I just install apache2 on ubuntu,the default www directory is /var/www/ ,I use ln to link it to '/media/Software/Program Files/wamp/www/' at the windows directory,but the apache shows 'You don't have permission to access / on this server',Then I use 'sudo chmod -R 777 /media/Software/Program\ Files/wamp/www/' to set the permission,but it didn't work,and nothing changed when I saw the permission in the preporties of the '.../wamp/www' folder.So I want to know How can I change the www directory to '.../wamp/www' as I also need to access this diretory in windows.

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  • When you should and should not use the 'new' keyword?

    - by skizeey
    I watched a Google Tech Talk presentation on Unit Testing, given by Misko Hevery, and he said to avoid using the new keyword in business logic code. I wrote a program, and I did end up using the new keyword here and there, but they were mostly for instantiating objects that hold data (ie, they didn't have any functions or methods). I'm wondering, did I do something wrong when I used the new keyword for my program. And where can we break that 'rule'?

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  • JADE Multiple Agents

    - by Umar niaz
    Is it is necessary to run jade instance on remote machine to communicate agents remotely? As I know that something must be running on remote machine to execute particular program but what if we want to create agent on local machine and send or distribute it on remote machine without running program on remote machine? Is it possible and if not, then what is solution? Do we need to run an instance of agent or jade on client machine to communicate agents remotely?

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  • AdBlock users statistics

    - by DataSmarter
    Are there statistics of internet users that use AdBlock or other ad blocking plug-ins? Are there some statistical breakdown, for example, per country (I assume it must vary a lot)? I was unable to google the information I am looking for. The reason I am asking is because I have just signed up for the "Amazon Partners" program and see that this affiliate program is listed on the AdBlock blacklist.

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  • link to executable file in ubuntu 11.10 with cairo dock

    - by ragv
    I am using ubuntu 11.10 with cairo dock in an acer aspire with core i3 2nd gen processor with intel graphics. I downloaded a program gingkocad as a tar file, opened the package with archive manager and created a folder for the package contents. To run the program i need to click the executable to run in terminal. Is there a way to create a shortcut to run the executable from an icon in cairo dock ? Please help. ragv

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  • WPF: Reloading app parts to handle persistence as well as memory management.

    - by Ingó Vals
    I created a app using Microsoft's WPF. It mostly handles data reading and input as well as associating relations between data within specific parameters. As a total beginner I made some bad design decision ( not so much decisions as using the first thing I got to work ) but now understanding WPF better I'm getting the urge to refactor my code with better design principles. I had several problems but I guess each deserves it's own question for clarity. Here I'm asking for proper ways to handle the data itself. In the original I wrapped each row in a object when fetched from database ( using LINQ to SQL ) somewhat like Active Record just not active or persistence (each app instance had it's own data handling part). The app has subunits handling different aspects. However as it was setup it loaded everything when started. This creates several problems, for example often it wouldn't be neccesary to load a part unless we were specifically going to work with that part so I wan't some form of lazy loading. Also there was problem with inner persistance because you might create a new object/row in one aspect and perhaps set relation between it and different object but the new object wouldn't appear until the program was restarted. Persistance between instances of the app won't be huge problem because of the small amount of people using the program. While I could solve this now using dirty tricks I would rather refactor the program and do it elegantly, Now the question is how. I know there are several ways and a few come to mind: 1) Each aspect of the program is it's own UserControl that get's reloaded/instanced everytime you navigate to it. This ensures you only load up the data you need and you get some persistancy. DB server located on same LAN and tables are small so that shouldn't be a big problem. Minor drawback is that you would have to remember the state of each aspect so you wouldn't always start at beginners square. 2) Having a ViewModel type object at the base level of the app with lazy loading and some kind of timeout. I would then propegate this object down the visual tree to ensure every aspect is getting it's data from the same instance 3) Semi active record data layer with static load methods. 4) Some other idea What in your opinion is the most practical way in WPF, what does MVVM assume?

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  • Geek City: Preparing for the SQL Server Master Exam

    - by Kalen Delaney
    I was amazed at the results when I just did a search of SQLBlog, and realized no one had really blogged here about the changes to the Microsoft Certified Master (MCM) program. Greg Low described the MCM program when he decided to pursue the MCM at the end of 2008, but two years later, at the end of 2010, Microsoft completely changed the requirements. Microsoft published the new requirements here . The three week intensive course is no longer required, but that doesn't mean you can just buy an exam...(read more)

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  • Library to fake intermittent failures according to tester-defined policy?

    - by crosstalk
    I'm looking for a library that I can use to help mock a program component that works only intermittently - usually, it works fine, but sometimes it fails. For example, suppose I need to read data from a file, and my program has to avoid crashing or hanging when a read fails due to a disk head crash. I'd like to model that by having a mock data reader function that returns mock data 90% of the time, but hangs or returns garbage otherwise. Or, if I'm stress-testing my full program, I could turn on debugging code in my real data reader module to make it return real data 90% of the time and hang otherwise. Now, obviously, in this particular example I could just code up my mock manually to test against a random() routine. However, I was looking for a system that allows implementing any failure policy I want, including: Fail randomly 10% of the time Succeed 10 times, fail 4 times, repeat Fail semi-randomly, such that one failure tends to be followed by a burst of more failures Any policy the tester wants to define Furthermore, I'd like to be able to change the failure policy at runtime, using either code internal to the program under test, or external knobs or switches (though the latter can be implemented with the former). In pig-Java, I'd envision a FailureFaker interface like so: interface FailureFaker { /** Return true if and only if the mocked operation succeeded. Implementors should override this method with versions consistent with their failure policy. */ public boolean attempt(); } And each failure policy would be a class implementing FailureFaker; for example there would be a PatternFailureFaker that would succeed N times, then fail M times, then repeat, and a AlwaysFailFailureFaker that I'd use temporarily when I need to simulate, say, someone removing the external hard drive my data was on. The policy could then be used (and changed) in my mock object code like so: class MyMockComponent { FailureFaker faker; public void doSomething() { if (faker.attempt()) { // ... } else { throw new RuntimeException(); } } void setFailurePolicy (FailureFaker policy) { this.faker = policy; } } Now, this seems like something that would be part of a mocking library, so I wouldn't be surprised if it's been done before. (In fact, I got the idea from Steve Maguire's Writing Solid Code, where he discusses this exact idea on pages 228-231, saying that such facilities were common in Microsoft code of that early-90's era.) However, I'm only familiar with EasyMock and jMockit for Java, and neither AFAIK have this function, or something similar with different syntax. Hence, the question: Do such libraries as I've described above exist? If they do, where have you found them useful? If you haven't found them useful, why not?

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  • Instruction vs data cache usage

    - by Nick Rosencrantz
    Say I've got a cache memory where instruction and data have different cache memories ("Harvard architecture"). Which cache, instruction or data, is used most often? I mean "most often" as in time, not amount of data since data memory might be used "more" in terms of amount of data while instruction cache might be used "more often" especially depending on the program. Are there different answers a) in general and b) for a specific program?

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  • MCM Preperations - how it's going

    - by NeilHambly
    Since the announcement in November 2010 that the MCM SQL Server 2008 Training program had been revamped, read more on that here http://www.sqlskills.com/BLOGS/PAUL/post/Big-changes-to-the-MCM-program-and-how-SQLskills-can-help-you.aspx Experienced SQL Professionals now have more opportunity to undertake this advanced certification, Where they previously might not have been able to undertake for a variety of reasons, {time, money, location etc..} With a few announcements of those who has recently...(read more)

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  • Accomplishment Viewer not displaying Ask Ubuntu badges

    - by Frantumn
    I've downloaded the new Ubuntu Accomplishment viewer. I've read and seen pictures of the program combining with AU badges. However, mine doesn't show anything other than the initial Trophies. I've set up my identity with my launcpad email, and I've gone to File/Check Accomplishments and it still doesn't show any of the AU items. Is there something extra I have to do to get this program to work with AU?

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  • SharpDX/D3D: How to implement and draw fonts/text

    - by Dmitrij A
    I am playing with SharpDX (Direct3D for .NET) without using "Toolkit", already finished with basic rendering 3D models. But now i am wondering how to program/create fonts for game (2D), or how to simple draw variable text to output with Direct3D? (it is not as SharpDX question as common Direct3D question, how to start with game GUIs? And what should i do to program simple GUI's like menu for a game (generally i understand that it's shaders).

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