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• SSIS Catalog, Windows updates and deployment failures due to System.Core mismatch

  - by jamiet

  This is a heads-up for anyone doing development on SSIS. On my current project where we are implementing a SQL Server Integration Services (SSIS) 2012 solution we recently encountered a situation where we were unable to deploy any of our projects even though we had successfully deployed in the past. Any attempt to use the deployment wizard resulted in this error dialog: The text of the error (for all you search engine crawlers out there) was: A .NET Framework error occurred during execution of user-defined routine or aggregate "create_key_information": System.IO.FileLoadException: Could not load file or assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ---> System.IO.FileLoadException: The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) System.IO.FileLoadException: System.IO.FileLoadException:     at Microsoft.SqlServer.IntegrationServices.Server.Security.CryptoGraphy.CreateSymmetricKey(String algorithm)    at Microsoft.SqlServer.IntegrationServices.Server.Security.CryptoGraphy.CreateKeyInformation(SqlString algorithmName, SqlBytes& key, SqlBytes& IV) . (Microsoft SQL Server, Error: 6522) After some investigation and a bit of back and forth with some very helpful members of the SSIS product team (hey Matt, Wee Hyong) it transpired that this was due to a .Net Framework fix that had been delivered via Windows Update. I took a look at the server update history and indeed there have been some recently applied .Net Framework updates: This fix had (in the words of Matt Masson) “somehow caused a mismatch on System.Core for SQLCLR” and, as you may know, SQLCLR is used heavily within the SSIS Catalog. The fix was pretty simple – restart SQL Server. This causes the assemblies to be upgraded automatically. If you are using Data Quality Services (DQS) you may have experienced similar problems which are documented at Upgrade SQLCLR Assemblies After .NET Framework Update. I am hoping the SSIS team will follow-up with a more thorough explanation on their blog soon. You DBAs out there may be questioning why Windows Update is set to automatically apply updates on our production servers. We’re checking that out with our hosting provider right now You have been warned! @Jamiet

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• How to handle "circular dependency" in dependency injection

  - by Roel

  The title says "Circular Dependency", but it is not the correct wording, because to me the design seems solid. However, consider the following scenario, where the blue parts are given from external partner, and orange is my own implementation. Also assume there is more then one ConcreteMain, but I want to use a specific one. (In reality, each class has some more dependencies, but I tried to simplify it here) I would like to instanciate all of this with Depency Injection (Unity), but I obviously get a StackOverflowException on the following code, because Runner tries to instantiate ConcreteMain, and ConcreteMain needs a Runner. IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); How can I avouid this? Is there any way to structure this so that I can use it with DI? The scenario I'm doing now is setting everything up manually, but that puts a hard dependency on ConcreteMain in the class which instantiates it. This is what i'm trying to avoid (with Unity registrations in configuration). All source code below (very simplified example!); public class Program { public static void Main(string[] args) { IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); Console.WriteLine("invoking runner..."); runner.DoSomethingAwesome(); Console.ReadLine(); } } public class Runner : IMainCallback { private readonly IMain mainServer; public Runner(IMain mainServer) { this.mainServer = mainServer; } public void DoSomethingAwesome() { Console.WriteLine("trying to do something awesome"); mainServer.DoSomething(); } public void SomethingIsDone(object something) { Console.WriteLine("hey look, something is finally done."); } } public interface IMain { void DoSomething(); } public interface IMainCallback { void SomethingIsDone(object something); } public abstract class AbstractMain : IMain { protected readonly IMainCallback callback; protected AbstractMain(IMainCallback callback) { this.callback = callback; } public abstract void DoSomething(); } public class ConcreteMain : AbstractMain { public ConcreteMain(IMainCallback callback) : base(callback){} public override void DoSomething() { Console.WriteLine("starting to do something..."); var task = Task.Factory.StartNew(() =>{ Thread.Sleep(5000);/*very long running task*/ }); task.ContinueWith(t => callback.SomethingIsDone(true)); } }

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• Silverlight Cream for February 05, 2011 -- #1041

  - by Dave Campbell

  In this Issue: Peter Kuhn, Mike Ormond(-2-, -3-), WindowsPhoneGeek, Daniel N. Egan, Phil Middlemiss(-2-), Max Paulousky, Michael Washington. Above the Fold: Silverlight: "Designing for Browser-Zoom: Part 2" Phil Middlemiss WP7: "Talking about Converters in WP7 | Coding4fun toolkit converters in depth" WindowsPhoneGeek Lightswitch: "LightSwitch: Can We Handle The Truth?" Michael Washington Shoutouts: András Velvárt has a video up of some awesome changes he has planned for SurfCube, check it out: SurfCube V2 - 3D Web Browser for Windows Phone 7, now with tabs! From SilverlightCream.com: Silverlight for keyboard junkies Peter Kuhn has a post up talking about the issues surrounding trying to use the tab key to navigate between controls... and follows it up with a behavior that resolves it. Windows Phone 7 Content On Demand Mike Ormond has a batch of WP7 Videos up... this first is "Windows Phone 7: A Different Kind of Phone" with Andrej Radinger. Windows Phone 7 Content on Demand Pt 2 Mike Ormond's 2nd WP7 video is "Understanding the Windows Phone 7 Development Tools and Getting Started" with Maarten Struys Windows Phone 7 Content on Demand Pt 3 Mike Ormond's 3rd WP7 Content on Demand is "Games Programming on Windows Phone 7 with Silverlight and XNA" with Rob Miles Talking about Converters in WP7 | Coding4fun toolkit converters in depth WindowsPhoneGeek is discussing value converters in his latest post... value converters for WP7... and the ones in the Coding4Fun toolkit to be exact... everything you wanted to know about them but didn't know to ask :) WP7 Developer Tools–Jan Update Daniel N. Egan has information up about the new WP7 Developer Tools release. Designing for Browser-Zoom: Part 1 Phil Middlemiss has both parts of a series on Browser Zoom up... this first part covers the zoom and different pieces involved. Designing for Browser-Zoom: Part 2 Phil Middlemiss's part 2 shows us some design considerations and visual states, including an attached behavior you can use in Blend to respond to the zoom event. Windows Phone Copy-Paste: How It Looks and Works Max Paulousky has the first post I've seen on WP7 Copy/Paste up... of course it's still in the emulator, but hey... that's better than nothing, right? LightSwitch: Can We Handle The Truth? Have you been playing with Lightswitch? Well... Michael Washington has, and it's got his interest up far enough that he's waving the flags trying to attract everyone else over there as well... see if you agree. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• A Generic, IDisposable WCF Service Client

  - by Steve Wilkes

  WCF clients need to be cleaned up properly, but as they're usually auto-generated they don't implement IDisposable. I've been doing a fair bit of WCF work recently, so I wrote a generic WCF client wrapper which effectively gives me a disposable service client. The ServiceClientWrapper is constructed using a WebServiceConfig instance, which contains a Binding, an EndPointAddress, and whether the client should ignore SSL certificate errors - pretty useful during testing! The Binding can be created based on configuration data or entirely programmatically - that's not the client's concern. Here's the service client code: using System; using System.Net; using System.Net.Security; using System.ServiceModel; public class ServiceClientWrapper<TService, TChannel> : IDisposable     where TService : ClientBase<TChannel>     where TChannel : class {     private readonly WebServiceConfig _config;     private TService _serviceClient;     public ServiceClientWrapper(WebServiceConfig config)     {         this._config = config;     }     public TService CreateServiceClient()     {         this.DisposeExistingServiceClientIfRequired();         if (this._config.IgnoreSslErrors)         {             ServicePointManager.ServerCertificateValidationCallback =                 (obj, certificate, chain, errors) => true;         }         else         {             ServicePointManager.ServerCertificateValidationCallback =                 (obj, certificate, chain, errors) => errors == SslPolicyErrors.None;         }         this._serviceClient = (TService)Activator.CreateInstance(             typeof(TService),             this._config.Binding,             this._config.Endpoint);         if (this._config.ClientCertificate != null)         {             this._serviceClient.ClientCredentials.ClientCertificate.Certificate =                 this._config.ClientCertificate;         }         return this._serviceClient;     }     public void Dispose()     {         this.DisposeExistingServiceClientIfRequired();     }     private void DisposeExistingServiceClientIfRequired()     {         if (this._serviceClient != null)         {             try             {                 if (this._serviceClient.State == CommunicationState.Faulted)                 {                     this._serviceClient.Abort();                 }                 else                 {                     this._serviceClient.Close();                 }             }             catch             {                 this._serviceClient.Abort();             }             this._serviceClient = null;         }     } } A client for a particular service can then be created something like this: public class ManagementServiceClientWrapper :     ServiceClientWrapper<ManagementServiceClient, IManagementService> {     public ManagementServiceClientWrapper(WebServiceConfig config)         : base(config)     {     } } ...where ManagementServiceClient is the auto-generated client class, and the IManagementService is the auto-generated WCF channel class - and used like this: using(var serviceClientWrapper = new ManagementServiceClientWrapper(config)) {     serviceClientWrapper.CreateServiceClient().CallService(); } The underlying WCF client created by the CreateServiceClient() will be disposed after the using, and hey presto - a disposable WCF service client.

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• Oracle ODP.NET und Windows PowerShell

  - by cjandaus

  In der Microsoft Welt wohlbekannt, in der Oracle Welt nur ein Schulterzucken hervorrufend - die sogenannten Scripting Guys. Wie der Name bereits vermuten lässt, geht es in deren Hey, Scripting Guy! Blog um Scripting. Und damit natürlich um die Windows PowerShell. Ja, die Zeiten des DOS-Kommandofensters und Batch-Dateien ist vorbei. Die PowerShell ist eine mächtige Scripting-Umgebung unter Windows, die selbst unter Unix/Linux-Administratoren Gefallen finden sollte. Dass man damit wunderbar auch auf Oracle Datenbanken zugreifen kann, haben wir bereits vor Jahren in einer Oracle Workshop Reihe bewiesen. Damals begleitete mich Klaus Rohe von Microsoft, der mit mir dann auch gemeinsam einen Vortrag auf DOAG Konferenz hielt. Unser gemeinsames Ziel war es damals wie heute, die Oracle Anwender von der hervorragenden Integration zwischen Oracle, Windows und .NET zu überzeugen. Was lag näher, als sich dies von beiden Herstellern gemeinsam bestätigen zu lassen? Vor allem die ewigen Zweifler begrüßten dies. Seither war die PowerShell bei mir nicht mehr auf dem Radar und auch Oracle Anwender haben das Thema nicht mehr aufgeworfen. Möglicherweise auch deshalb, weil es zu neu oder zu unbekannt ist? Eher unwahrscheinlich ... Vielleicht liegt es vielmehr daran, dass man einfach mal davon ausgeht, dass PowerShell nur für Microsoft Produkte richtig nutzbar ist? Oder man bekommt erzählt, dass nur die Integration mit der Microsoft-eigenen Datenbank SQL Server möglich ist? Und das ist natürlich nicht richtig - so wie immer (ich denke dabei unter anderem an das Microsoft Active Directory - aber dazu ein andermal mehr). Umso mehr freut es mich, einen brandneuen Blog-Beitrag zu genau diesem Thema zu lesen, auf den mich Alex Keh, (Produkt Manager für Windows und .NET im Oracle Headquarter in San Francisco) aufmerksam gemacht hat. Was die Sache noch besser macht, dieser Beitrag stammt aus der Microsoft Welt und belegt damit zwischen den Zeilen, dass die Oracle Datenbank und unsere .NET Integration via dem Oracle Data Provider for .NET (ODP.NET) auch hier eine bedeutende Rolle spielt. In diesem Sinne: Beide Daumen hoch für die Scripting Guys! Der Beitrag nennt sich Use Oracle ODP.NET and PowerShell to Simplify Data Access und trotz ein paar weniger Ausreißer, ist der Artikel sehr zu empfehlen, um in das Thema einzusteigen. Lassen Sie es mich wissen, wie Sie zu dieser Integration stehen, ob die PowerShell für Sie in der Praxis wichtig ist oder werden könnte, und falls Sie Features vermissen, die Oracle künftig umsetzen sollte. Danke!

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• Silverlight Cream for June 15, 2010 - 2 -- #883

  - by Dave Campbell

  In this Issue: Vibor Cipan, Chris Klug, Pete Brown, Kirupa, and Xianzhong Zhu. Shoutouts (thought I gave up on them, didn't you?): Jesse Liberty has the companion video to his WP7 OData post up: New Video: Master/Detail in WinPhone 7 with oData Michael Scherotter who made the first Ball Watch SL1 app back in the day, has a Virtual Event: Creating an Entry for the BALL Watch Silverlight Contest... sounds like the thing to do if you want in on this :) Even if you don't speak Portuguese, you can check this out: MSN Brazil Uses Silverlight to Showcase the 2010 FIFA World Cup South Africa Erik Mork and crew have their latest up: This Week in Silverlight – Teched and Quizes Michael Klucher has a post up to give you some relief if you're having Trouble Installing the Windows Phone Developer Tools Portuguese above and now French... Jeremy Alles has a post up about [WP7] Windows Phone 7 challenge for french readers ! Just a note, not that it makes any difference, but Adam Kinney turned @SilverlightNews over to me today. I am the only one that has ever posted on it, but still having it all to myself feels special :) From SilverlightCream.com: Silverlight 4 tutorial: HOW TO use PathListBox and Sample Data Crank up that new version of Blend and follow along with Vibor Cipan's PathListBox tutorial ... oh, and sample data too. Cool INotifyPropertyChanged implementation Chris Klug shows off some INotifyPropertyChange goodness he is not implementing, and credits a blog by Manuel Felicio for some inspiration. Check out that post as well... I've tagged his blog... I needed *another* one :) Silverlight Tip: Using LINQ to Select the Largest Available Webcam Resolution With no Silverlight Tip of the Day today, Pete Brown stepped up with this tip for finding the largest available webcam resolution using LINQ ... and read the comment from Rene as well. Creating a Master-Detail UI in Blend Kirupa has a very nice Master/Detail UI post up with backrounder info and the code for the project. There's a running example in the post for you to get an idea what you're learning. Get started with Farseer Physics 2.1.3 in Silverlight 3 Xianzhong Zhu has a Silverlight 3 tutorial up for Farseer Physics 2.1.3 ... might track for Silverlight 4, but hey, WP7 is kinda/sort Silverlight 3, right? ... lots of code and external links. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Canonicalization of single, small pages like reviews or product categories [SEO]

  - by Valorized

  In general I pretty much like the idea of canonicalization. And in most cases, Google explains possible procedures in a clear way. For example: If I have duplicates because of parameters (eg: &sort=desc) it's clear to use the canonical for the site, provided the within the head-tag. However I'm wondering how to handle "small - no to say thin content - sites". What's my definition of a small site? An Example: On one of my main sites, we use a directory based url-structure. Let's see: example.com/ (root) example.com/category-abc/ example.com/category-abc/produkt-xy/ Moreover we provide on page, that includes all products example.com/all-categories/ (lists all products the same way as in the categories) In case of reviews, we use a similar structure: example.com/reviews/product-xy/ shows all review for one certain product example.com/reviews/product-xy/abc-your-product-is-great/ shows one certain review example.com/reviews/ shows all reviews for all products (latest first) Let's make it even more complicated: On every product site, there are the latest 2 reviews at the end of the page. So you see, a lot of potential duplicates. Q1: Should I create canonicals for a: example.com/category-abc/ to example.com/all-categories/ b: example.com/reviews/product-xy/abc-your-product-is-great/ to example.com/reviews/product-xy/ or to example.com/review/ or none of them? Q2: Can I link the collection of categories (all-categories/) and collection of all reviews (reviews/ and reviews/product-xy/) to the single category respectively to the single review. Example: example.com/reviews/ includes - let's say - 100 reviews. Can I somehow use a markup that tells search engines: "Hey, wait, you are now looking at a collection of 100 reviews - do not index this collection, you should rather prefer indexing every single review as a single page!". In HTML it might be something like that (which - of course - does not work, it's only to show you what I mean): <div class="review" rel="canonical" href="http://example.com/reviews/product-xz/abc-your-product-is-great/">HERE GOES THE REVIEW</div> Reason: I don't think it is a great user experience if the user searches for "your product is great" and lands on example.com/reviews/ instead of example.com/reviews/product-xy/abc-your-product-is-great/. On the first site, he will have to search and might stop because of frustration. The second result, however, might lead to a conversion. The same applies for categories. If the user is searching for category-Z, he might land on the all-categories page and he has to scroll down to the (last) category, to find what he searched for (Z). So what's best practice? What should I do? Thank you for your help!

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• Most Unprofessional Workplace

  - by TehGrumpyCoder

  I've worked lots of places in lots of roles: Delivery truck driver, Boilermaker, antenna rigger, Professional Musician, Electronic Technician, Electrical Engineer, and for most of my career: Software Turkey. I want to say this large company is the most unprofessional place I've ever worked, but then I think about other jobs such as TTI that stiffed us all for 10 months salary -- or had us work 2-1/2 years at 66% however you want to look at it, or maybe NeoPlanet with a cast from a bad sitcom running the show, I could go on, but I digress (as usual). So maybe this place isn't the *most* unprofessional, but the personnel rank up there. I'm in a small room off a factory. There are 3 managerial offices, and 36 common-folk of various skill-sets in a variety of single to quad cubicles. No matter where you sit though, because of the layout and location, you've got a hard wall as one wall of your cubicle. Because of that hard wall, everything echoes. I get off the phone, and the guy in the next cubicle makes a comment in response to my phone conversation... I hate that it can be heard and I hate that they do that! These people have no problem yelling from cube to cube to carry on running conversations some of which are actually work-related. There's a lady two cubes away that talks so loud I can clearly hear every phone conversation she has... all work-related but still... Then the one in the next cubicle must have been raised on a farm because there's only one volume setting: LOUD... "HEY MARGE, CAN I GET IN FOR A QUICK APPOINTMENT AFTER WORK TONIGHT?" ... sigh Also that cube is the 'party cube' so that's where all the candy, cake, donuts, and leftovers sits. Anything MzLoud brings in has to have a verbal recipe associated with it at least 10 times during the day, and of course at volume. I've had running conversations over the top of my cube from people in the next one on each side. The weird thing is... the boss sits with an open door closer to this whole fiasco than me. So I wear a pair of Bose noise-cancelling headphones, and crank up Kenny Burrell, Herb Ellis, Wes Montgomery, or Jimmy Smith to the point I can't hear the racket... what the heck, I already have a hearing loss from playing guitar.

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• Simple Mouse Move Event in F# with Winforms

  - by MarkPearl

  This evening I had the pleasure of reading one of ThomasP’s blog posts on first class events. It was an excellent read, and I thought I would make a brief derivative of his post to explore some of the basics. In Thomas’s post he has a form with an ellipse on it that when he clicks on the ellipse it pops up a message box with the button clicked… awesome. Something that got me on the post though was the code similar to the one below… // React to Mouse Move events on the form let evtMessages = frm.MouseMove |> Event.map (fun mi -> mi.Location.ToString()) |> Event.map (sprintf "Hey, you clicked on the ellipse.\nUsing: %s") |> Event.add (MessageBox.Show >> ignore) The MessageBox is a function with a string passed into it. What if I wanted to rather change a mutable value holder instead, how would the syntax go for that? Immediately the thought came to me of anonymous functions. I’ve used them before to do something like this… let HelloPerson personName = "Hello " + personName |> fun(x) -> Console.WriteLine(x) So using the same approach I adapted the event code to instead of showing a Message Box with a string passed in to it, to rather change the forms header. |> Event.map (sprintf "Your mouse position is %s") |> Event.add(fun(x) -> frm.Text <- x) Okay… it looks a bit weird with the –> x <- syntax, but makes sense and works… The next thing I wanted to do was change Thomas’s code sample from having an ellipse, and reacting to the position of the mouse and click, to rather trigger the event whenever the mouse moved. This simple involved removing some filtering code. Finally I wanted the code to work as a FSharp Project without having to run through the F# interactive. To achieve this I just needed to find out how to trigger the window event loop. This can be achieved with the code below… // Program eventloop while frm.Created do Application.DoEvents()   So lets look at the complete code sample… #light open System open System.Drawing open System.Windows.Forms // Create the main form let frm = new Form(ClientSize=Size(600,400)) // React to Mouse Move events on the form let evtMessages = frm.MouseMove |> Event.map (fun mi -> mi.Location.ToString()) |> Event.map (sprintf "Your mouse position is %s") |> Event.add(fun(x) -> frm.Text <- x) // Show the form frm.Show() // Program eventloop while frm.Created do Application.DoEvents()

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• Returning null vs Throwing exceptions

  - by Svish

  Is in a bit of disagreement with a more experienced developer on this issue, and was wondering what you guys here think about this. Environment is Java, EJB 3, services, etc. The code I wrote calls a service to get things and to create things. Problem was that I got null pointer exceptions in places that didn't make sense. For example when I asked the service to create an object, I got null back. And when I tried to look up an object with an id I knew existed, I still got null back. Was like it was ignoring me. Spent some time trying to figure out what was wrong in my code (since I'm less experienced I usually assume I have messed up). Turns out the reason was security. If the user principal using my service didn't have the right permissions to use the service I called from my service, then that service simply returned null. The services that are here already are usually not documented either, so this is just something you have to know... somehow... So here is the thing: I mean that this is rather confusing as a developer interacting with this service. To me it would make much more sense if that service thew an exception which would tell me that hey, you don't have the proper permissions to get info about this thing or to create this new thing. I would then immediately know why my service wasn't working as expected. However, he argued that asking is not wrong. Exceptions should only be thrown when there is an error and asking for a thing is not an error. Even if you don't have permission to "see" that the thing you asked for. The things are often looked up in a GUI by users and for those users not having the right permissions, these things simply "do not exist". So, in short: Asking is not wrong, hence no exception. Get methods return null because to those users those things "doesn't exist". Create methods return null because nothing was created, since the user wasn't allowed to create anything. So, what do you guys think? Is this normal and/or good practice? I prefer exceptions as I prefer throwing and catching exceptions because I find it much easier to know what's going on. So I would for example also prefer to throw a NotFoundException if you asked for an id which didn't exist, rather than returning null. Anyways, just curious to what others think about this as I'm not the most experienced developer yet.

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• Canonicalization of single, small pages like reviews or product categories

  - by Valorized

  In general I pretty much like the idea of canonicalization. And in most cases, Google explains possible procedures in a clear way. For example: If I have duplicates because of parameters (eg: &sort=desc) it's clear to use the canonical for the site, provided the within the head-tag. However I'm wondering how to handle "small - no to say thin content - sites". What's my definition of a small site? An Example: On one of my main sites, we use a directory based url-structure. Let's see: example.com/ (root) example.com/category-abc/ example.com/category-abc/produkt-xy/ Moreover we provide on page, that includes all products example.com/all-categories/ (lists all products the same way as in the categories) In case of reviews, we use a similar structure: example.com/reviews/product-xy/ shows all review for one certain product example.com/reviews/product-xy/abc-your-product-is-great/ shows one certain review example.com/reviews/ shows all reviews for all products (latest first) Let's make it even more complicated: On every product site, there are the latest 2 reviews at the end of the page. So you see, a lot of potential duplicates. Q1: Should I create canonicals for a: example.com/category-abc/ to example.com/all-categories/ b: example.com/reviews/product-xy/abc-your-product-is-great/ to example.com/reviews/product-xy/ or to example.com/review/ or none of them? Q2: Can I link the collection of categories (all-categories/) and collection of all reviews (reviews/ and reviews/product-xy/) to the single category respectively to the single review. Example: example.com/reviews/ includes - let's say - 100 reviews. Can I somehow use a markup that tells search engines: "Hey, wait, you are now looking at a collection of 100 reviews - do not index this collection, you should rather prefer indexing every single review as a single page!". In HTML it might be something like that (which - of course - does not work, it's only to show you what I mean): <div class="review" rel="canonical" href="http://example.com/reviews/product-xz/abc-your-product-is-great/"> HERE GOES THE REVIEW</div> Reason: I don't think it is a great user experience if the user searches for "your product is great" and lands on example.com/reviews/ instead of example.com/reviews/product-xy/abc-your-product-is-great/. On the first site, he will have to search and might stop because of frustration. The second result, however, might lead to a conversion. The same applies for categories. If the user is searching for category-Z, he might land on the all-categories page and he has to scroll down to the (last) category, to find what he searched for (Z). So what's best practice? What should I do?

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• Network Your Computers & Devices: Step by Step

  - by The Geek

  If you’re looking for a great book to help you learn more about Windows home networking, there’s a new book on the market by our good friend Ciprian, and published by none other than Microsoft Press. Note: our friend Ciprian has been a guest contributor here on How-To Geek in the past, and he’s not only a geek that knows what he’s talking about, he’s also one of the more honest and decent people I’ve worked with. In his spare time, he runs the 7 Tutorials web site. The Book One of the great things about this book is that you aren’t limited to just Windows networking—it also explains how to connect Windows 7, XP, Vista, Mac OS X, and even Linux on the same network and share folders and devices between them. Everything in the book is written in a typical How-To Geek step-by-step format, with plenty of screenshots and pictures to help you through the process. Book Outline If you’re going to be spending some money on the book, you probably want to know what it’s all about, and since the Amazon page doesn’t give, well, much information at all, here’s the entire outline for you: Setting Up a Router and Devices Setting User Account on All Computers Setting Up Your Libraries on All Windows 7 Computers Creating the Network Customizing Network Sharing Settings in Windows 7 Creating the Homegroup and Joining Windows 7 Computers Sharing Libraries and Folders Sharing and Working with Devices Streaming Media Over the Network and the Internet Sharing Between Windows XP, Windows Vista, and Windows 7 Computers Sharing Between Mac OS X and Windows 7 Computers Sharing Between Ubuntu Linux and Windows 7 Computers Keeping the Network Secure Setting Up Parental Controls Troubleshooting Network and Internet Problems It’s a great book, with loads of information, and compared to most tech books isn’t very expensive—only $19.79 for the paperback and $9.99 for the Kindle version. Well worth it, and hey, it’s an official Microsoft Press book—written by a How-To Geek guest author. Network Your Computers & Devices Step by Step [Amazon] Latest Features How-To Geek ETC How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC 2011 International Space Station Calendar Available for Download (Free) Ultimate Elimination – Lego Black Ops [Video] BotSync Enables Secure FTP File Synchronization on Android Devices Enjoy Beautiful City Views with the Cityscape Theme for Windows 7 Luigi Installs Any OS on Google’s Cr-48 Notebook DIY iPad Stylus Offers Pen-Based Interaction on the Cheap

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• ASP.NET Membership Password Hash -- .NET 3.5 to .NET 4 Upgrade Surprise!

  - by David Hoerster

  I'm in the process of evaluating how my team will upgrade our product from .NET 3.5 SP1 to .NET 4. I expected the upgrade to be pretty smooth with very few, if any, upgrade issues. To my delight, the upgrade wizard said that everything upgraded without a problem. I thought I was home free, until I decided to build and run the application. A big problem was staring me in the face -- I couldn't log on. Our product is using a custom ASP.NET Membership Provider, but essentially it's a modified SqlMembershipProvider with some additional properties. And my login was failing during the OnAuthenticate event handler of my ASP.NET Login control, right where it was calling my provider's ValidateUser method. After a little digging, it turns out that the password hash that the membership provider was using to compare against the stored password hash in the membership database tables was different. I compared the password hash from the .NET 4 code line, and it was a different generated hash than my .NET 3.5 code line. (Tip -- when upgrading, always keep a valid debug copy of your app handy in case you have to step through a lot of code.) So it was a strange situation, but at least I knew what the problem was. Now the question was, "Why was it happening?" Turns out that a breaking change in .NET 4 is that the default hash algorithm changed to SHA256. Hey, that's great -- stronger hashing algorithm. But what do I do with all the hashed passwords in my database that were created using SHA1? Well, you can make two quick changes to your app's web.config and everything will be OK. Basically, you need to override the default HashAlgorithmTypeproperty of your membership provider. Here are the two places to do that: 1. At the beginning of your element, add the following element: <system.web> <machineKey validation="SHA1" /> ... </system.web> 2. On your element under , add the following hashAlgorithmType attribute: <system.web> <membership defaultProvider="myMembership" hashAlgorithmType="SHA1"> ... </system.web> After that, you should be good to go! Hope this helps.

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• Please Stop Voting Against a Candidate

  - by Brian Lanham

  DISCLAIMER:  This is not a post about “Romney” or “Obama”.  This is not a post for whom I am voting.  This is simply a post to address an issue that I cannot ignore any longer.  This two-party system that we have allowed to establish a foothold is killing this country.    More than 2 Options I was recently asked, “If you had to choose Romney or Obama who would you pick?”  I replied “Non sequiter.  The founders of this nation ensured that I never have to pick from only two candidates.”  But somehow that is the way this country’s citizens think.  I told someone last week that there are around 20 candidates for president and she was genuinely surprised.  (There are actually 25 candidates.)  She had no idea there were that many and, even though she knew there are more, she didn’t know any names beyond Romney and Obama.  Well, I am going to try and educate people like her on other options. Vote for a Candidate, not against another Candidate So this post is the first in a series with a little bit of information about each candidate for president.  I implore you…I beg you, please do your civic duty and conduct a little bit of investigation and research on your own to find the right candidate for you.  Hey, if your candidate is Romney or Obama, that’s fine.  As long as it’s an educated decision.  But please…stop voting against a candidate.  Start voting for a candidate. A List of CandidatesAs I mentioned, I am going to write a little something about each candidate and I’m going to go by alphabetical order by PARTY, then by CANDIDATE LAST NAME so as to not show any bias. P.S. – If you want to know the candidate I selected I am happy to tell you.  But that’s not what this series is about.PARTYCANDIDATEAmerica's Party   Tom HoeflingAmerican Third Position PartyMerlin MillerAmericans Elect PartyNo candidates met the requirement to enter into the online caucus.Constitution PartyVirgil GoodeDemocratic Party   Barack ObamaGrassroots Party   Jim CarlsonGreen Party   Jill SteinIndependent American Party   Will ChristensenJustice PartyRocky AndersonLibertarian Party   Gary JohnsonObjectivist PartyTom StevensPeace and Freedom Party   Roseanne BarrReform PartyAndre BarnettRepublican PartyMitt RomneySocialism and Liberation PartyPeta LindsaySocialist Equality PartyJerry WhiteSocialist Party USAStewart AlexanderSocialist Workers PartyJames HarrisIndependent Candidates Jeff BossRichard DuncanJerry Litzel Dean Morstad Jill Reed Randall TerrySheila Tittle Michael Vargo

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• How Microsoft Market DotNet?

  - by Fendy

  I just read an Joel's article about Microsoft's breaking change (non-backwards compatibility) with dot net's introduction. It is interesting and explicitly reflected the condition during that time. But now almost 10 years has passed. The breaking change It is mainly on how bad is Microsoft introducing non-backwards compatibility development tools, such as dot net, instead of improving the already-widely used asp classic or VB6. As much have known, dot net is not natively embedded in windows XP (yes in vista or 7), so in order to use the .net apps, you need to install the .net framework of over 300mb (it's big that day). However, as we see that nowadays many business use .net as their main development tools, with asp.net or mvc as their web-based applications. C# nowadays be one of tops programming languages (the most questions in stackoverflow). The more interesing part is, win32api still alive even there is newer technology out there (and still widely used). Imagine if microsoft does not introduce the breaking change, there will many corporates still uses asp classic or vb-based applications (there still is, but not that much). There are many corporates use additional services such as azure or sharepoint (beside how expensive is it). Please note that I also know there are many flagships applications (maybe adobe's and blizzard's) still use C-based or older language and not porting to newer high-level language. The question How can Microsoft persuade the users to migrate their old applications into dot net? As we have known it is very hard and give no immediate value when rewrite the applications (netscape story), and it is very risky. I am more interested in Microsoft's way and not opinion such as "because dot net is OOP, or dot net is dll-embedable, etc". This question may be constructive, as the technology is vastly changes over times lately. As we can see, Microsoft changes Asp.Net webform to MVC, winform is legacy now, it is starting to change to use windows store rather than basic-installment, touchscreen and later on we will have see-through applications such as google class. And that will be breaking changes. We will need to account portability as an issue nowadays. We will need other than just mere technology choice, but also migration plans. Even maybe as critical as we might need multiplatform language compiler, as approached by Joel's Wasabi. (hey, I read his articles too much!)

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• Removing Menu Items from Window Tabs

  - by Geertjan

  So you're working on your NetBeans Platform application and you notice that when you right-click on tabs in the predefined windows, e.g., the Projects window, you see a long list of popup menus. For whatever the reason is, you decide you don't want those popup menus. You right-click the application and go to the Branding dialog. There you uncheck the checkboxes that are unchecked below: As you can see above, you've removed three features, all of them related to closing the windows in your application. Therefore, "Close" and "Close Group" are now gone from the list of popup menus: But that's not enough. You also don't want the popup menus that relate to maximizing and minimizing the predefined windows, so you uncheck those checkboxes that relate to that: And, hey, now they're gone too: Next, you decide to remove the feature for floating, i.e., undocking the windows from the main window: And now they're gone too: However, even when you uncheck all the remaining checkboxes, as shown here... You're still left with those last few pesky popup menu items that just will not go away no matter what you do: The reason for the above? Those actions are hardcoded into the action list, which is a bug. Until it is fixed, here's a handy workaround: Set an implementation dependency on "Core - Windows" (core.window). That is, set a dependency and then specify that it is an implementation dependency, i.e., that you'll be using an internal class, not one of the official APIs. In one of your existing modules, or in a new one, make sure you have (in addition to the above) a dependency on Lookup API and Window System API. And then, add the class below to the module: import javax.swing.Action; import org.netbeans.core.windows.actions.ActionsFactory; import org.openide.util.lookup.ServiceProvider; import org.openide.windows.Mode; import org.openide.windows.TopComponent; @ServiceProvider(service = ActionsFactory.class) public class EmptyActionsFactory extends ActionsFactory { @Override public Action[] createPopupActions(TopComponent tc, Action[] actions) { return new Action[]{}; } @Override public Action[] createPopupActions(Mode mode, Action[] actions) { return new Action[]{}; } } Hurray. Farewell to superfluous popup menu items on your window tabs. In the screenshot below, the tab of the Projects window is being right-clicked and no popup menu items are shown, which is true for all the other windows, those that are predefined as well as those that you add afterwards:

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• SOASuite 11.1.1.4 : Error Logging into BPM11g Composer?

  - by angelo.santagata

  Hey all, I’ve just installed SOA Suite 11.1.1.4 and noticed a few funnies which people might hit, thankfully each of them have an easy solution.   1. Some applications are installed but dont appear to work? If when you install SOASuite you may notice that the following applications dont appear to work, however they do appear as deployments in Weblogic Server Console e.g.  SOA Composer (composer), FMW Welcome Page Application (11.1.0.0.0) and some of the adaptors. If they appear in the deployments list state as “installed” and not Active, then its likely that they haven't been targeted to a specific server.   The solution is to target the application the desired managed server , e.g. AdminServer in a development environment. This is done by selecting the application, tab “Targets”, select all components, Button[change Targets] and select the appropriate server. This change can be done without restarting the Weblogic Server 2. You might find that when you try to log into the BPM Composer at http://machine:7001/bpm/composer , the login screen will appear but you cant log in. The error log might mention the following   The solution to this is two fold, a) When creating the domain, avoid using 127.0.0.1 as the Listener address, or “Any Addresses”, if this is a development machine create an alias in your /etc/hosts file and then use this alias in the domain creation wizard. e.g.   my host file contains an entry     mypc     127.0.0.1   And in the Fusion middleware Configuration wizard   Twill then work!   if it still doesnt you can try setting the ServerURL attribute to http://mypc in the SoaInfraMBean instead of blank. This is accomplished by using Enterprise Manager. Use the System MBean Browser to navigate to Application Defined MBeans->oracle.as.soainfra.config->[ server]->SoaInfraConfig->soa-infra. Then changing the value of 'ServerURL' to http://mypc   Failing that give support a call….

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• Shelving &ndash; What is it &ndash; and more importantly, can it help me?

  - by Chris Skardon

  Since we shifted to TFS we’ve had the ability to perform what is known as ‘shelving’. Shelving (whilst not a wholly new topic in the world of SCC) is new to us, and didn’t exist in our previous SCC solution – SVN. Soo… what is it? What? Shelving is a way to check-in but not check-in your code. By shelving you submit a copy of your ‘pending changes’ to the SCC server, (which maintains a list of the shelvesets) and once that is done you can either continue working, or undo your changes, safe in the knowledge that a backup copy exists on the server. You can unshelve your code at any time and get back to the state you were when you shelved. Yer, that is great but why not just check it in?? Shelvesets don’t have to build. The shelveset you put in there could be entirely broken, or it might solve every bug in the system – shelves aren’t continuously integrated so you can shelve anything. Hmmmm… What else? Shelving allows us to do some pretty cool stuff that beforehand was quite frankly a pain. For instance – Gated Check-ins are implemented via the shelving mechanism, when code is checked-in, what you’re actually doing is shelving it, the Build Controller will build the shelveset with the original code and if it succeeds, the code will be committed, if it fails – well – it’s only you that has to fix the code :) Other nice features are things like the ability to share code you are working on… For example, if I was having trouble with a particular piece of code, I could shelve it, and then you (yes you) could then get that shelveset and check out the problem for yourself, and if you fix it?? Well – you could check-it in! Nice, but day-to-day shizzle? Let’s say you’ve been working on your project and your project manager comes over to you and says: “Hey, errr, bad times, there is an urgent bug we need you to fix, it needs to go out now!” (also for this to play out – we’ll need to assume you’re currently working in the 'release’ branch for another bug fix (maybe))… You could undo all your current changes (obviously you’ll probably backup your code using zip or something I imagine) fix the bug, then re-copy your backup over the top, or you could shelve and unshelve. Perhaps some other uses will awaken the shelver in you… :) Before each checkin – if you shelve, you no longer need to worry (if indeed you do) about resolving conflicts and mysteriously losing your code… Going home at night? Not checking in straight away? Why not shelve, this way – should the worst come to the worst and your local pc gives up, you can just get the shelveset onto another machine and be up and running in literally seconds minutes…

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• Using jQuery to Make a Field Read Only in SharePoint

  - by Mark Rackley

  Okay… this will be my shortest blog post EVER. Very little rambling.. I promise, and I’m sure this has been blogged more than once, so I apologize for adding to the noise, but like I always say, I blog for myself so I have a global bookmark. So,let’s say you have a field on a SharePoint Form and you want to make it read only. You COULD just open it up in SPD and easily make it read only, but some people are purists and don’t like use SPD or modify the default new/edit/disp forms. Put me in the latter camp, I try to avoid modifying these forms and it seemed like such a simple task that I didn’t want to create a new un-ghosted form.  So.. how do you do it? It’s only one line of jQuery. All you need to do is find the id for your input field and capture the keypress on it so that it cannot be modified (you should probably capture clicks for dropdowns/checkboxes/etc. but I didn’t need to).  Anyway, here’s the entire script: <script src="jquery.min.js" type="text/javascript"></script> <script type="text/javascript"> jQuery(document).ready(function($){ //capture keypress on our read only field and return false $('#idOfInputField').keypress(function() { return false; }); }) </script>   You can find the ID of your input field by viewing the source, this ID stays consistent as long as you don’t muck with the list or form in the wrong way.  Please note, you CANNOT disable the input field as an alternative to capturing the keypress. If you do this and save the form, any data in the disabled fields will be wiped out. There are probably a dozen ways to make a field read-only and if all you are using jQuery for is to make a field read-only, then you might want to question your use of adding the overhead (although it’s really not that much). Hey.. it’s another tool for your tool belt.

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• Parallel MSBuild FTW - Build faster in parallel

  - by deadlydog

  Hey everyone, I just discovered this great post yesterday that shows how to have msbuild build projects in parallel Basically all you need to do is pass the switches “/m:[NumOfCPUsToUse] /p:BuildInParallel=true” into MSBuild. Example to use 4 cores/processes (If you just pass in “/m” it will use all CPU cores): MSBuild /m:4 /p:BuildInParallel=true "C:\dev\Client.sln" Obviously this trick will only be useful on PCs with multi-core CPUs (which we should all have by now) and solutions with multiple projects; So there’s no point using it for solutions that only contain one project.  Also, testing shows that using multiple processes does not speed up Team Foundation Database deployments either in case you’re curious Also, I found that if I didn’t explicitly use “/p:BuildInParallel=true” I would get many build errors (even though the MSDN documentation says that it is true by default). The poster boasts compile time improvements up to 59%, but the performance boost you see will vary depending on the solution and its project dependencies.  I tested with building a solution at my office, and here are my results (runs are in seconds): # of Processes 1st Run 2nd Run 3rd Run Avg Performance 1 192 195 200 195.67 100% 2 155 156 156 155.67 79.56% 4 146 149 146 147.00 75.13% 8 136 136 138 136.67 69.85%   So I updated all of our build scripts to build using 2 cores (~20% speed boost), since that gives us the biggest bang for our buck on our solution without bogging down a machine, and developers may sometimes compile more than 1 solution at a time.  I’ve put the any-PC-safe batch script code at the bottom of this post. The poster also has a follow-up post showing how to add a button and keyboard shortcut to the Visual Studio IDE to have VS build in parallel as well (so you don’t have to use a build script); if you do this make sure you use the .Net 4.0 MSBuild, not the 3.5 one that he shows in the screenshot.  While this did work for me, I found it left an MSBuild.exe process always hanging around afterwards for some reason, so watch out (batch file doesn’t have this problem though).  Also, you do get build output, but it may not be the same that you’re used to, and it doesn’t say “Build succeeded” in the status bar when completed, so I chose to not make this my default Visual Studio build option, but you may still want to. Happy building! ------------------------------------------------------------------------------------- :: Calculate how many Processes to use to do the build. SET NumberOfProcessesToUseForBuild=1  SET BuildInParallel=false if %NUMBER_OF_PROCESSORS% GTR 2 (                 SET NumberOfProcessesToUseForBuild=2                 SET BuildInParallel=true ) MSBuild /maxcpucount:%NumberOfProcessesToUseForBuild% /p:BuildInParallel=%BuildInParallel% "C:\dev\Client.sln"

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• Help with Collision of spawned object(postion fixed) with objects that there are translating on screen

  - by Amrutha

  Hey guys I am creating a game using Corona SDK and so coding it in Lua. So there are 2 separate functions, To translate the hit objects and change their color when they are tapped The link below is the code I am using to for the first function http://developer.anscamobile.com/sample-code/fishies Spawn objects that will hit the translating objects on collision. Alos on collision the spawned object disappears and the translating object bears a color(indicating the collision). In addition the size of this spawned object is dependent on i/p volume level. The function I have written is as follows, --VOICE INPUT CODE local r = media.newRecording() r:startRecording() r:startTuner() --local function newBar() -- local bar = display.newLine( 0, 0, 1, 0 ) -- bar:setColor( 0, 55, 100, 20 ) -- bar.width = 5 -- bar.y=400 -- bar.x=20 -- return bar --end local c1 = display.newImage("str-minion-small.png") c1.isVisible=false local c2 = display.newImage("str-minion-mid.png") c2.isVisible=false local c3 = display.newImage("str-minion-big.png") c3.isVisible=false --SPAWNING local function spawnDisk( event ) local phase = event.phase local volumeBar = display.newLine( 0, 0, 1, 0 ) volumeBar.y = 400 volumeBar.x = 20 -- volumeBar.isVisible=false local v = 20*math.log(r:getTunerVolume()) local MINTHRESH = 30 local LEFTMARGIN = 20 local v2 = MINTHRESH + math.max (v, -MINTHRESH) v2 = (display.contentWidth - 1 * LEFTMARGIN ) * v2 / MINTHRESH volumeBar.xScale = math.max ( 20, v2 ) local l = volumeBar.xScale local cnt1 = 0 local cnt2 = 0 local cnt3 = 0 local ONE =1 local val = event.numTaps --local px=event.x --local py=event.y if "ended" == phase then --audio.play( popSound ) --myLabel.isVisible = false if l > 50 and l <=150 then -- c1:setFillColor(10,105,0) -- c1.isVisible=false c1.x=math.random( 10, 450 ) c1.y=math.random( 10, 300 ) physics.addBody( c1, { density=1, radius=10.0 } ) c1.isVisible=true cnt1= cnt1+ ONE return c1 elseif l > 100 and l <=250 then --c2:setFillColor(200,10,0) c2.x=math.random( 10, 450 ) c2.y=math.random( 10, 300 ) physics.addBody( c2, { density=2, radius=9000.0 } ) c2.isVisible=true cnt2= cnt2+ ONE return c2 elseif l >=250 then c3.x=math.random( 40, 450 ) c3.y=math.random( 40, 300 ) physics.addBody( c3, { density=2, radius=7000.0 , bounce=0.0 } ) c3.isVisible=true cnt3= cnt3+ ONE return c3 end end end buzzR:addEventListener( "touch", spawnDisk ) -- touch the screen to create disks Now both functions work fine independently but there is no collision happening. Its almost as if the translating object and the spawn object are on different layers. The translating object passes through the spawn object freely. Can anyone please tell me how to resolve this problem. And how can I get them to collide. Its my first attempt at game development, that too for a mobile platform so would appreciate all help. Also if I have not been specific do let me know. I ll try to frame the query better :). Thanks in advance.

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• Help with Collision of spawned object(postion fixed) with objects that there are translating on screen

  - by Amrutha

  Hey guys I am creating a game using Corona SDK and so coding it in Lua. So there are 2 separate functions, To translate the hit objects and change their color when they are tapped The link below is the code I am using to for the first function http://developer.anscamobile.com/sample-code/fishies Spawn objects that will hit the translating objects on collision. Alos on collision the spawned object disappears and the translating object bears a color(indicating the collision). In addition the size of this spawned object is dependent on i/p volume level. The function I have written is as follows: --VOICE INPUT CODE local r = media.newRecording() r:startRecording() r:startTuner() --local function newBar() -- local bar = display.newLine( 0, 0, 1, 0 ) -- bar:setColor( 0, 55, 100, 20 ) -- bar.width = 5 -- bar.y=400 -- bar.x=20 -- return bar --end local c1 = display.newImage("str-minion-small.png") c1.isVisible=false local c2 = display.newImage("str-minion-mid.png") c2.isVisible=false local c3 = display.newImage("str-minion-big.png") c3.isVisible=false --SPAWNING local function spawnDisk( event ) local phase = event.phase local volumeBar = display.newLine( 0, 0, 1, 0 ) volumeBar.y = 400 volumeBar.x = 20 --volumeBar.isVisible=false local v = 20*math.log(r:getTunerVolume()) local MINTHRESH = 30 local LEFTMARGIN = 20 local v2 = MINTHRESH + math.max (v, -MINTHRESH) v2 = (display.contentWidth - 1 * LEFTMARGIN ) * v2 / MINTHRESH volumeBar.xScale = math.max ( 20, v2 ) local l = volumeBar.xScale local cnt1 = 0 local cnt2 = 0 local cnt3 = 0 local ONE =1 local val = event.numTaps --local px=event.x --local py=event.y if "ended" == phase then --audio.play( popSound ) --myLabel.isVisible = false if l > 50 and l <=150 then --c1:setFillColor(10,105,0) --c1.isVisible=false c1.x=math.random( 10, 450 ) c1.y=math.random( 10, 300 ) physics.addBody( c1, { density=1, radius=10.0 } ) c1.isVisible=true cnt1= cnt1+ ONE return c1 elseif l > 100 and l <=250 then --c2:setFillColor(200,10,0) c2.x=math.random( 10, 450 ) c2.y=math.random( 10, 300 ) physics.addBody( c2, { density=2, radius=9000.0 } ) c2.isVisible=true cnt2= cnt2+ ONE return c2 elseif l >=250 then c3.x=math.random( 40, 450 ) c3.y=math.random( 40, 300 ) physics.addBody( c3, { density=2, radius=7000.0 , bounce=0.0 } ) c3.isVisible=true cnt3= cnt3+ ONE return c3 end end end buzzR:addEventListener( "touch", spawnDisk ) -- touch the screen to create disks Now both functions work fine independently but there is no collision happening. Its almost as if the translating object and the spawn object are on different layers. The translating object passes through the spawn object freely. Can anyone please tell me how to resolve this problem. And how can I get them to collide. Its my first attempt at game development, that too for a mobile platform so would appreciate all help. Also if I have not been specific do let me know. I'll try to frame the query better :). Thanks in advance.

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• Managing accounts on a private website for a real-life community

  - by Smudge

  Hey Pro Webmasters, I'm looking at setting-up a walled-in website for a real-life community of people, and I was wondering if anyone has any experience with managing member accounts for this kind of thing. Some conditions that must be met: This community has a set list of real-life members, each of whom would be eligible for one account on the website. We don't expect or require that they all sign-up. It is purely opt-in, but we anticipate that many of them would be interested in the services we are setting up. Some of the community members emails are known, but some of them have fallen off the grid over the years, so ideally there would be a way for them to get back in touch with us through the public-facing side of the site. (And we'd want to manually verify the identity of anyone who does so). Their names are known, and for similar projects in the past we have assigned usernames derived from their real-life names. This time, however, we are open to other approaches, such as letting them specify their own username or getting rid of usernames entirely. The specific web technology we will use (e.g. Drupal, Joomla, etc) is not really our concern right now -- I am more interested in how this can be approached in the abstract. Our database already includes the full member roster, so we can email many of them generated links to a page where they can create an account. (And internally we can require that these accounts be paired with a known member). Should we have them specify their own usernames, or are we fine letting them use their registered email address to log-in? Are there any paradigms for walled-in community portals that help address security issues if, for example, one of their email accounts is compromised? We don't anticipate attempted break-ins being much of a threat, because nothing about this community is high-profile, but we do want to address security concerns. In addition, we want to make the sign-up process as painless for the members as possible, especially given the fact that we can't just make sign-ups open to anyone. I'm interested to hear your thoughts and suggestions! Thanks!

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• Criteria for selecting timeout value?

  - by stijn

  Situation: a piece of software reads frames of data from a file in a seperate thread and puts it on a queue, emptied by another thread. That second thread periodically checks on the queue and fails rather gracefully, by showing an error message stating the read timed out, if no data is available within a certain amount of time. Initially this timeout was set to 200mSec. There was no real reasoning behind that constant though, but it worked fine. We measured on a couple of machines and for large data frames, larger than what would be used by customers, a read took like 20mSec whith no other load on the machine. However one customer now gets timeout errors now and then (on the second try all is fine, probably the file is in cache or the virus scanner leaves it alone). The programmers are like 'well, yeah, but that customer's machine is full of cruft, virus scanners, tons of unneeded background processes etc'. Of course the customer is like 'hey this should just work, shouldn't it'? While the programers have a point, since the software is heavy enough to validate the need for a dedicated machine, that does not make the customer happy. Increasing the timeout to 2 seconds, for example, solves the problem. But I'd like to make a proper decision now instead of just randomly pick some magic constant that is probably ok in 99% of cases. What criteria should be used for that? We could just pick a large number, but that feels wrong. (and then we end up with a program that has the horrible bahaviour of hanging when trying to read from a disconnected drive for instance, whereas we'd rather make it show an error right away). Or we could make the timeout value a user setting, but then we need to ducument it clearly and even then not all customers are tech savy enough to really understand what it does. Or we could try and wait until another customer reports timeouts and increase the value again. And again. Until we find something ok for 99.99% of the cases.. Any good practice for this type of situation?

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• Dual booting windows 8/ubuntu 12.04.2, Grub doesn't appear and machine never boot in ubuntu

  - by black sensei

  i got a new ACER predator AG3620-UR308 which came with windows 8, so i wanted to run ubuntu 12.04.2 on it as a dual booting. To be honest, i've been doing dual booting for a while now so, i did the right thing. the box came with 2TB HDD. so i made 4 partitions with a raw partition just after the windows installation partition I always do manual installation so even if ubuntu didn't detect windows 8, it was ok for me. So i created swap area and finished the installation etc....Grub was install on the only drive there which is sda. After reboot, grub doesn't even come up.So it always boot in windows 8. I did repeat the installation process twice and yield same result. which is weird because this method always works for me so far.Even the laptop am using to write this post is a dual booting windows 7/ mint nadia installed the same way. Is there anything new in windows 8 that i didn't make provision for? Before starting the installation, all i read about was that , windows 8 should be installed first and ubuntu after. I went ahead and disable secure boot from the BIOS and enabled CSM (don't even know what it means) according to Acer custhelp site . I boot from USB and did fdisk -l bellow is the result: ubuntu@ubuntu:~$ sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x8c361cb5 Device Boot Start End Blocks Id System /dev/sda1 1 3907029167 1953514583+ ee GPT Partition 1 does not start on physical sector boundary. Disk /dev/sdb: 8178 MB, 8178892800 bytes 255 heads, 63 sectors/track, 994 cylinders, total 15974400 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0006a87e Device Boot Start End Blocks Id System /dev/sdb1 * 2048 15972351 7985152 b W95 FAT32 ubuntu@ubuntu:~$ Can anybody shed some light? thank you in advance EDIT Hey, i just did another trial with 13.04 this time and still no luck. bios: secure-boot: disabled enable CSM : always 1-delete previous ubuntu partition and swap area partition.now having free space 2- used usb installer to prepare usb with ubuntu-13.04-desktop-amd64.iso 3- rebooted : liveusb didnt detect windows 8, used something else 4-created partition ext4 for / 5-created partition for swap-area 6- default grub path is /dev/sda and clicked install Acer always boots into windows.

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