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• naive bayesian spam filter question

  - by Microkernel

  Hi guys, I am planning to implement spam filter using Naive Bayesian classification model. Online I see a lot of info on Naive Bayesian classification, but the problem is its a lot of mathematical stuff, than clearly stating how its done. And the problem is I am more of a programmer than a mathematician (yes I had learnt Probability and Bayesian theorem back in school, but out of touch for a long long time, and I don't have luxury of learning it now (Have nearly 3 weeks to come-up with a working prototype)). So if someone can explain or point me to location where its explained for programmers than a mathematician, it would be a great help. PS: By the way I have to implement it in C, if you want to know. :( Regards, Microkernel

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• java enterprise project

  - by darko petreski

  Hi All, All the time we are hearing that java is enterprise. We have read many books about jpa, entity beans and other stuff. All this books explain this technology with some dummy examples. I have not seen a book that explains real problems with enterprise beans, java clients and security! I mean real book not some imaginated stupid examples . Is there any book that describes completely some enterprise system, Its architecture, communication, security, of course the client that uses the distributed components ? I need a book that will cover the flowing: server side components (ejb, jpa) client side java desktop application security (authentication and authorization) web services with complete authentication clustering (we can find for all of this a book, but there is no book that covers all this things in one piece. Also all the books are with dummy samples.) Or may be some project that is documented. Regards, Darko

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• Using Moq at Blend design time

  - by adrian hara

  This might be a bit out there, but suppose I want to use Moq in a ViewModel to create some design time data, like so: public class SomeViewModel { public SomeViewModel(ISomeDependency dependency) { if (IsInDesignMode) { var mock = new Mock<ISomeDependency>(); dependency = mock.Object; // this throws! } } } The mock could be set up to do some stuff, but you get the idea. My problem is that at design-time in Blend, this code throws an InvalidCastException, with the message along the lines of "Unable to cast object of type 'Castle.Proxies.ISomeDependencyProxy2b3a8f3188284ff0b1129bdf3d50d3fc' to type 'ISomeDependency'." While this doesn't necessarily look to be Moq related but Castle related, I hope the Moq example helps ;) Any idea why that is? Thanks!

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• UIView drawRect; class variables out of scope

  - by Toby Wilson

  Short & sweet version of my last question in light of new information. I have a UIVIew with an init and a drawrect method (and another thread and a bunch of other stuff, but I'll keep it short & sweet). All of the class variables that I alloc and init in the -(id)init method are out of scope/nil/0x0 in the drawRect method, and I am unable to access them. For example; In the interface: NSObject* fred; In the implementation: -(id)init { if(self == [super init]) { fred = [[NSObject alloc] init]; } return self; } -(void)drawRect:(CGRect)rect { NSLog(@"Fred is retained %i times",[fred retainCount]); //FAIL NSLog(@"But his variable is actually just pointing at uninitialised 0x0, so you're not reading this in the debugger because the application has crashed before it got here." } Should add that init IS being called before drawRect also. Anyone have any ideas?

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• T-SQL XML Query, how to seperate matching nodes into individual rows?

  - by FlySwat

  I have a table that has a column full of XML like: <parent> <child> <name>Sally</name> </child> <child> <name>Bobby</name> </child> </parent> I'm trying to extract all of the names of the children into seperate rows. My desired resultset would look like: Sally Bobby However, if I do something like: SELECT data.query('data(//parents/child/name)') FROM stuff I get back a single row that looks like Sally Bobby What am I doing wrong with the XPath?

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• How to change number of tabs in tabbar controller application ?

  - by hib

  Hi I am developing an iPhone tabbar application with 5 tabs . I want to show only two tabs at the launch time such as one is "locate me". When the user taps on the locate me tab another 3 tabs will be shown and can use the current location. I want to do some thing like "urban spoon" . I am using the interface builder for all the stuff. If any one have any idea , suggestion , links then provide me. Thanks .

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• Why do users have to enter a 7-digit twitter PIN to grant my application access?

  - by Tony

  I am implementing some ruby on rails code tweet stuff for my users. I am creating the proper oauth link...something like http://twitter.com/oauth/authorize?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv But after my test account grants access to twitter, it pulls up a page saying "You've successfully granted access to . Simply return to and enter the following PIN to complete the process. 1234567" I have no idea where the user should enter this PIN and why they have to do that. I don't think this should be a necessary step. Twitter should be redirecting the user to the callback URL I provided in the application settings. Does anyone know why this is happening? UPDATE I found this article that states I need to send my users to this URL (note "authenticate" instead of "authorize"): http://twitter.com/oauth/authenticate?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv I made the change but Twitter redirects the user to the authorize path after he clicks "Allow" which then gives him the 7 digit PIN again!

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• Asp.net override Membership settings at runtime (asp.net mvc)

  - by minal

  I had an application that hooked onto 1 single database. The app now needs to hook into multiple databases. What we want to do is, using the same application/domain/hostname/virtual dir give the user the option on the login screen to select the "App/Database" they want to connect into. Each database has the App tables/data/procs/etc as well as the aspnet membership/roles stuff. When the user enters the username/password and selects (select list) the application, I want to validate the user against the selected applications database. Presently the database connection string for membership services is saved in the web.config. Is there any way I can override this at login time? Also, I need the "remember me" function to work smoothly as well. How does this work when the user comes back to the app in 5 hours... This process should be able to identify the user and application and log in appropriately.

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• ASP.NET MVC vs. ASP.NET 4.0

  - by CodeMonkey

  I watched this webcast recently, and I got the sense that a lot of the "cool stuff" from ASP.NET MVC is getting pulled back into the ASP.NET framework. At the moment I'm setting the ground-work for a project at my company using ASP.NET MVC, but after watching this, I'm beginning to wonder if that's the right choice, and whether it would behoove me to wait for ASP.NET 4.0. I realize ASP.NET MVC 2.0 is getting close to an actual release. If High-Testability, loose coupling, and having Full control of our HTML are top priorities, which should I choose, ASP.NET 4.0 or ASP.NET MVC?

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• Easiest way to render Wiki Syntax (for example MoinMoin Wiki)

  - by Alex

  I enjoy using to Wikis to document all kind of stuff (recently I used MoinMoin, so I am used to that syntax). No I am looking for a more light weight solution, for documents were setting up a moinmoin server is to much hassle. What is the "easiest" way to render a .txt file in Wiki syntax. (for example by displaying it, or converting it to HTML). it should work on Linux, but the more platform in-dependent, the better. Maybe there is even a Javascript based solution?

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• HTML encode UTF-8 string gets mangled into latin1

  - by Ken Mayer

  I'm parsing my nginx logs, and I want to discover some details from the HTTP_REFERER string, for example, the query string used to find the web site. One user typed in "México" which gets encoded in the log as "query=M%E9xico". Passing this through Rack::Utils.parse_query('query=M%E9xico') you get a hash, {"query" = "M?xico"} When you to stuff "M?exico" into Postgres (but not the more forgiving SQLite), it pukes because the string isn't proper UTF-8. Looking at http://rack.rubyforge.org/doc/Rack/Utils.html#M000324, unescape is packing a hex string. How can I convert the string back to UTF-8, or can I get parse_query to return UTF-8 in the first place.

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• linq where clause and count result in null exception.

  - by nestling

  The code below works unless p.School.SchoolName turns out to be null, in which case it results in a NullReferenceException. if (ExistingUsers.Where(p => p.StudentID == item.StaffID && p.School.SchoolName == item.SchoolID).Count() > 0) { // Do stuff. } ExistingUsers is a list of users: public List<User> ExistingUsers; Here is the relevant portion of the stacktrace: System.NullReferenceException: Object reference not set to an instance of an object. at System.Linq.Enumerable.WhereListIterator1.MoveNext() at System.Linq.Enumerable.Count[TSource](IEnumerable1 source) How should I handle this where clause? Thanks very much in advance.

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• Custom message headers in WCF on Mono

  - by TheNextman

  I'm making WCF calls from a Mono client running on Ubuntu (Mono 2.6). I can't seem to add a custom header to my messages. I have tried two different ways: Using a [MessageContract] and [MessageHeader] attributes on a custom class Adding the header to the outgoing messages programmatically, e.g. MessageHeader mhg = new MessageHeader("test"); MessageHeader untyped = mhg.GetUntypedHeader("token", "ns"); OperationContext.Current.OutgoingMessageHeaders.Add(untyped); The header is not there when the call reaches the server! It's always null. Note that both methods work fine running on .NET in Windows. Also note that the message body gets through just fine on Mono. I see some references online that suggest this should work: http://forums.monotouch.net/yaf_postsm1692.aspx https://bugzilla.novell.com/show_bug.cgi?id=551745 Also - the Mono status page shows that all the MessageHeader stuff is fully implemented... Anyone had luck with this? Thanks in advance, Richard

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• What is in scala-android.jar?

  - by synic

  I've been trying to experiment with developing Android applications with Scala. I've gotten to the point where I can get the app to compile, but there are no helper functions for things like: button.setOnClickListener( () => { text.setText("test") }) (I'm talking about the closure there) I see lots of references to scala-android.jar, and have this file in my project, but I'm not sure what it does, or how to use it. I get the feeling it has these helper conversion functions, but I'm not sure. Running jar -tvf scala-android.jar on the file gives me this: 401 Sun Jun 06 10:06:02 MDT 2010 scala/Function0$class.class 431 Sun Jun 06 10:06:02 MDT 2010 scala/Function0.class 572 Sun Jun 06 10:06:02 MDT 2010 scala/Function1.class 282 Sun Jun 06 10:06:02 MDT 2010 scala/ScalaObject$class.class 271 Sun Jun 06 10:06:02 MDT 2010 scala/ScalaObject.class 458 Sun Jun 06 10:06:02 MDT 2010 scala/runtime/BoxedUnit.class If this isn't what I'm looking for, is there a simple library that'll do conversions for this kind of stuff?

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• Is there any event fired when a DataTemplate has been initiated in WPF?

  - by Shimmy

  Hello! Take a look at the following xaml: <ListBox ItemsSource="{Binding}"> <ListBox.Resources> <CollectionViewSource x:Key="CVS"/> </ListBox.Resources> <ListBox.DataTemplate> <DataTemplate OnBinding="myBinding"> <ListBox DataContext="{StaticResource CVS}" ItemsSource="{Binding}" /> </DataTemplate> </ListBox.DataTemplate> </ListBox> So I can handle the binding and manually retrieve the CVS and set its Source property to my custom stuff according to the DataTemplate's DataContext. Or else there is a different way in doing it. Any ideas are welcommed!

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• Is there a way to test HTTP Live Streaming via an iSight camera?

  - by bpapa

  I'm working on an iPhone app that will use HTTP Live Streaming. Using Apple's provided tools (particularly mediafilesegmenter), I'm able to successfully segment and serve an archived video. Now I want to test Live Streaming stuff. I don't own any sort of camcorder, I just have my iSight built-in to my Mac. Is there a way to leverage this camera to test out Live Streaming? Run iSight from the command line maybe? If so, I need a port number for mediastreamsegmenter.

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• build .pyc prob

  - by Apache

  hi experts, i build .py as follow python /root/pyinstaller-1.4/Makespec.py test.py then python /root/pyinstaller-1.4/Build.py test.spec this working fine then i test to build with my .pyc as follow python /root/pyinstaller-1.4/Makespec.py test.pyc then python /root/pyinstaller-1.4/Build.pyc test.spec but its generating error as follow checking Analysis building because inputs changed running Analysis outAnalysis0.toc Analyzing: /root/pyinstaller-1.4/support/_mountzlib.py Analyzing: /root/pyinstaller-1.4/support/useUnicode.py Analyzing: test.pyc Traceback (most recent call last): File "/root/pyinstaller-1.4/Build.py", line 1160, in main(args[0], configfilename=opts.configfile) File "/root/pyinstaller-1.4/Build.py", line 1148, in main build(specfile) File "/root/pyinstaller-1.4/Build.py", line 1111, in build execfile(spec) File "test.spec", line 3, in pathex=['/root/test']) File "/root/pyinstaller-1.4/Build.py", line 245, in init self.postinit() File "/root/pyinstaller-1.4/Build.py", line 196, in postinit self.assemble() File "/root/pyinstaller-1.4/Build.py", line 314, in assemble analyzer.analyze_script(script) File "/root/pyinstaller-1.4/mf.py", line 559, in analyze_script co = compile(string.replace(stuff, "\r\n", "\n"), fnm, 'exec') TypeError: compile() expected string without null bytes why this error occur, cannot we build using .pyc, or there is other way to build it,

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• which ASP.NET hosting site allows listening on different ports than 80 and uses .NET 4?

  - by ijjo

  I'm trying to take advantage of HTML 5 web sockets in .NET and the easiest way appears to be something like what this guy does. I've already tested this myself and it works great, but there are a few problems if I try to deploy this to my hosting site (discountasp.net). Basically, I am not allowed to open up a port on 8080 and listen on it. I then tried to figure out a way to listen on port 80 with IIS as well, but using the HTTPListener, I run into sercurity issues as well. This doesn't seem like it will help since I can't mess with this stuff on the hosting site server either. So to make my life easier, I think I need to find a hosting site that simply allows me to open up a socket on port 8080 and listen on it. Anyone know of one? Or does anyone know of a workaround (besides sniffing all the traffic on port 80)?

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• What parts of .NET require administrative priviliges to be executed?

  - by Ruben Steins

  Which parts of the framework require a user to be more than a Standard User? The reason I'm asking is because I'm trying to compile a list of possible issues with our existing applications when migrating to Windows 7. Now, I can think of a few things myself: Writing to Eventlog Writing to Registry Keys outside of Current_User scope Getting an Environment variable etc... I really would like a more complete list and so far I've not come across a decent resource in which all this stuff is listed. Note that I'm not looking for ways of elevating the priviliges for the exsiting apps (which can be done by using a manifes), I'm simply idenitifying actions in code that might cause issues.

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• Boost Thread Hanging on _endthreadex

  - by FranticPedantic

  I think I am making a simple mistake, but since I noticed there are many boost experts here, I thought I would ask for help. I am trying to use boost threads(1_40) on windows xp. The main program loads a dll, starts the thread like so (note this is not in a class, the static does not mean static to a class but private to the file). static boost::thread network_thread; network_start() { // do network stuff until quit is signaled } DllClass::InitInstance() { network_thread = boost::thread(boost::bind<void>(network_start)); } DllClass::ExitInstance() { //signal quit (which works) //the following code is slightly verbose because I'm trying to figure out what's wrong try { if (network_thread.joinable() ) { network_thread.join(); } else { TRACE("Too late!"); } } catch (boost::thread_interrupted&) { TRACE("NET INTERRUPTED"); } } The problem is that the main thread is hanging on the join, and the network thread is hanging at the end of _endthreadex. What am I misunderstanding?

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• Is there a complete working example of a unit tested JPA2/CDI/JSF2 WebApp without EJBs ?

  - by Maxime ARNSTAMM

  Hello everyone, I want to build a web app in JPA2/CDI (without EJBs) and i get how to code the different beans (i worked for some time on seam/jpa apps), but i'm stuck because i can't find a complete working set of configuration files (ie : persistence.xmln web.xml and stuff), and there is always a little glitch or something i miss. My goal is to develop a simple CRUD (1 or 2 pages) but unit tested, for future use, as a code base. So if you already did this kind of mini project, or if you know where i can find a working example, that would be great if you could help me. Thanks

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• which asp net hosting site allows to listen on differnt port than 80 and uses .net 4?

  - by ijjo

  i'm trying to take advantage of html 5 web sockets in .NET and the easiest way appears to do something like this guy does: http://www.codeproject.com/KB/webservices/c_sharp_web_socket_server.aspx?msg=3485900#xx3485900xx i've already tested this myself and it works great, but there are a few problems if i try to deploy this to my hosting site (discountasp.net). basically i am not allowed to open up a port on 8080 and listen on it. i then tried to figure out a way to listen non port 80 with IIS as well, but using the HTTPListener runs into sercurity issues as well that doesn't seem like will help since i can't mess with this stuff on the hosting site server either: http://stackoverflow.com/questions/169904/can-i-listen-on-a-port-using-httplistener-or-other-net-code-on-vista-without-r so to make my life easier, i think i need to find a hosting site that simply allows me to open up a socket on port 8080 and listen on it. anyone know of one? or anyone know of a workaround (besides sniffing ALL the traffic on port 80)?

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• Server side speech to text

  - by teepusink

  Hi, I'm trying to install a speech recognition engine server side. (non commercial preferred since it's just for experimentation) The idea is to allow a user to say something from a website then whatever he/she says will show up on the screen (as text) I've read about many available softwares ranging from Microsoft Speech, Sphinx, Julius etc just not sure which one will perform best and easiest to install. Also do typically do I need to have root permission on my hosting to do this kind of stuff? I'm using a regular shared hosting right now. Thank you, Tee

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• tptp/profiling of web-application within eclipse - no data collectors available

  - by AJ

  Hi, I have a problem with tptp/profiling within eclipse. Because at first I had some very strange problems, I downloaded the “TPTP all-in-one package” (tptp.runtime.allInOne.win32.win32.x86-TPTP-4.6.2.zip) and added the stuff I need (Jboss-Tools, etc.) I am using Windows XP SP3, Java 6u20, Eclipse 3.5.2.(, jboss-4.2.3.GA-jdk6) In "Profile Configurations"/Tab "Monitor" I got “IWAT0435E An error occurred when connecting to the host” and in the “Profile on Server” Window in the tab Monitor I got only “pre-JRE 1.5“ as choice. After disabling an enabling the IAC in “Preferences”/”Agent Controller” that IWAT...-problem was gone but now I don't get anything in the “Profile on Server”/”Monitor” tab, but it says “[Monitor] The launch requires at least one data collector to be selected.” any ideas?

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• C# Inhieriting DataContract Derived Types

  - by dsjohnston

  I've given a fair read through msdn:datacontracts and I cannot find a out why the following does not work. So what is wrong here? Why isn't ExtendedCanadianAddress recognized by the datacontract serializer? Type 'XYZ.ExtendedCanadianAddress' with data contract name 'CanadianAddress:http://tempuri.org/Common/Types' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer. Given: namespace ABC { [KnownType(typeof(Address))] public abstract class Z { //stuff //method that adds all types() in namespace to self } [KnownType(typeof(CanadianAddress))] [DataContact(Name = "Address", Namespace = "http://tempuri.org/Types")] public class Address : Z {} [DataContract(Name = "CanadianAddress", Namespace = "http://tempuri.org/Types")] public class CanadianAddress : Address {} } namespace XYZ { [KnownType(typeof(ExtendedCanadianAddress)) [DataContact(Name = "Address", Namespace = "http://tempuri.org/Types")] public class ExtendedAddress : Address { //this serializes just fine } [DataContact(Name = "CanadianAddress", Namespace = "http://tempuri.org/Types")] public class ExtendedCanadianAddress : CanadianAddress { //will NOT serialize } }

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