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• PLCameraController is not adding in viewcontroller

  - by sujyanarayan

  Hi, I've declared PLCameraContoller instance in my AppDelegate class as:- self.cameraController = [PLCameraController performSelector:@selector(sharedInstance)];[cameraController setDelegate:self]; And I'm accessing it in one of my viewcontroller class as:- del = [[UIApplication sharedApplication] delegate]; UIView previewView = [del.cameraController performSelector:@selector(previewView)]; previewView.frame = CGRectMake(0,0, 320, 480); self.view = previewView; [del.cameraController performSelector:@selector(startPreview)]; [del.cameraController performSelector:@selector(setCameraMode:) withObject:(NSNumber)1]; Where "del" is an instance of my AppDelegate class. But i can see only black background in my viewcontroller view in iphone device. Also if i remove "self" from the appdelegate.m code of cameracontroller it also showing blank. How can i get camera in my view controller? I'm pretty much struggling with it. Thanks in Adv.

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• How can I create a collection of references in C#

  - by Jonathan Kaufman

  Ok I am having a cross language hiccup. In C# with it's great collections like List and I have: a Map class with properties of: List<byte[]> Images; List<Tile> Tiles; a Tile Class of: byte[] ImageData; int X; int Y; Now I want to add an image to the Map class and have the ImageData property of the Tile Classes to "reference" it. I have discovered I can't just assign it Images[0]. You can't have a reference to an object of a List. My fix was to create a Dictionary. Is this the best way or can I somehow have a "pointer" to a collection of objects?

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• JavaScript socket vs. Flash socket?

  - by Dr.Dredel

  Steve Jobs just posted this article on why Apple rejects Flash... http://www.apple.com/hotnews/thoughts-on-flash/ I agree that javascript and css can be used to replicate some of Flash's animation, though Flash does all sorts of scaling and tweening that is incredibly powerful, and I'm not sure that there's anything comparable in javascript, if there is, I certainly haven't seen it. However, my question is about the socket. Flash has an incredibly powerful openSocket class that allows you to connect to a server and have the server and the client talk back and forth to one another. As far as I know there is no equivalent class in Javascript. Am I mistaken? Is there some secret mystery Ajax class that replicates the openSocket? If not, then that feature alone makes Flash an invaluable tool. I'm interested in all answers though... and yes this IS a programming question! :)

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• ActiveX communication

  - by Mario Marinato -br-

  I'm developing an ActiveX EXE that exposes an specific class to a third-party software. This third-party software instanciates an object of this class and uses its methods. Strangely, this third-party software destroys its object of my exposed class as soon as it calls an specific method, but I have no idea why this happens. The only clue I have is that this method is the only one that returns a value. All the other ones are simple 'subs' that do not return any value, and when they are called nothing wrong happens. I'm using VB6. Do you guys have any idea of why it's happening?

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• Prepopulate drop-box according to another drop-box choice in Django Admin

  - by onorua

  I have models like this: class User(models.Model): Switch = models.ForeignKey(Switch, related_name='SwitchUsers') Port = models.ForeignKey(Port) class Switch(models.Model): Name = models.CharField(max_length=50) class Port(models.Model): PortNum = models.PositiveIntegerField() Switch = models.ForeignKey(Switch, related_name = "Ports") When I'm in Admin interface and choose Switch from Switches available, I would like to have Port prepopulated accordingly with Ports from the related Switch. As far as I understand I need to create some JS script to prepopulate it. Unfortunately I don't have this experience, and I would like to keep things simple as it possible and don't rewrite all Django admin interface. Just add this functionality for one Field. Could you please help me with my problem? Thank you.

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• Picking Up Repositories With Structuremap

  - by alphadogg

  I am not sure how to use StructureMap to scan for all repositories in a particular namespace. Most repositories take the form: namespace CPOP.Infrastructure.Repositories { public class PatientRepository : LinqRepository<Patient>, IPatientRepository { } } namespace CPOP.Infrastructure.Repositories { public class LinqRepository<T> : Repository<T>, ILinqRepository<T> { } } namespace CPOP.Domain.Contracts.Repositories { public interface IPatientRepository : ILinqRepository<Patient> { } } I tried: x.Scan(scanner => { scanner.Assembly(Assembly.GetExecutingAssembly()); scanner.ConnectImplementationsToTypesClosing(typeof(ILinqRepository<>)); }) But, it only picks up the LinqRepository class. What's the best way to pick up the various repositories I'll be dumping in there?

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• WMI: How to differentiate between Wireless mouse and touch screen

  - by kingas

  I am using Win32_PointingDevice class to detect mice connected to the system. I ran my device discovery script on a machine which has touch screen. The discovery shows up with 3 pointing devices, directly connected USB mouse, wireless mouse and touch screen. My question is how to distinguish between USB mouse with touch screen. If Win32_PointingDevice class doesn't provide information then are there any other methods which I can use to get mouse and touch information. This is extension to my previous question at http://stackoverflow.com/questions/1746689/wmi-class-for-wireless-mouse

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• Ruby on Rails: attr_accessor for submodels

  - by williamjones

  I'm working with some models where a lot of a given model's key attributes are actually stored in a submodel. Example: class WikiArticle has_many :revisions has_one :current_revision, :class_name => "Revision", :order => "created_at DESC" end class Revision has_one :wiki_article end The Revision class has a ton of database fields, and the WikiArticle has very few. However, I often have to access a Revision's fields from the context of a WikiArticle. The most important case of this is probably on creating an article. I've been doing that with lots of methods that look like this, one for each field: def description if @description @description elsif current_revision current_revision.description else "" end end def description=(string) @description = string end And then on my save, I save @description into a new revision. This whole thing reminds me a lot of attr_accessor, only it doesn't seem like I can get attr_accessor to do what I need. How can I define an attr_submodel_accessor such that I could just give field names and have it automatically create all those methods the way attr_accessor does?

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• Conversion of Linq expressions

  - by Arnis L.

  I'm not sure how exactly argument what I'm trying to achieve, therefore - wrote some code: public class Foo{ public Bar Bar{get;set;} } public class Bar{ public string Fizz{get;set;} } public class Facts{ [Fact] public void fact(){ Assert.Equal(expectedExp(),barToFoo(barExp())); } private Expression<Func<Foo,bool>> expectedExp(){ return f=>f.Bar.Fizz=="fizz"; } private Expression<Func<Bar,bool>> barExp(){ return b=>b.Fizz=="fizz"; } private Expression<Func<Foo,bool>> barToFoo (Expression<Func<Bar,bool>> barExp){ return Voodoo(barExp); //<-------------------------------------------??? } } Is this even possible?

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• Google App Engine python - Self is not defined

  - by sdasdas

  I have a request that maps to this class ChatMsg It takes in 3 get variables, username, roomname, and msg. But it fails on this last line here. class ChatMsg(webapp.RequestHandler): # this is line 239 def get(self): username = urllib.unquote(self.request.get('username')) roomname = urllib.unquote(self.request.get('roomname')) # this is line 242 When it tries to assign roomname, it tells me: <type 'exceptions.NameError'>: name 'self' is not defined Traceback (most recent call last): File "/base/data/home/apps/chatboxes/1.341998073649951735/chatroom.py", line 239, in <module> class ChatMsg(webapp.RequestHandler): File "/base/data/home/apps/chatboxes/1.341998073649951735/chatroom.py", line 242, in ChatMsg roomname = urllib.unquote(self.request.get('roomname')) what the hell is going on to make self not defined

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• Separate seeds in PHPUnit

  - by mik

  How do I create a separate seed for some test inside one test class? PHPUnit documentation includes this example <?php require_once 'PHPUnit/Extensions/Database/TestCase.php'; class DatabaseTest extends PHPUnit_Extensions_Database_TestCase { protected function getConnection() { $pdo = new PDO('mysql:host=localhost;dbname=testdb', 'root', ''); return $this->createDefaultDBConnection($pdo, 'testdb'); } protected function getDataSet() { return $this->createFlatXMLDataSet(dirname(__FILE__).'/_files/bank-account-seed.xml'); } } ?> But in this example I have one seed for all the tests inside my class. Thank you for help.

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• Using Fortran to call C++ Functions

  - by Dane Larsen

  I'm trying to get some FORTRAN code to call a couple c++ functions that I wrote (c_tabs_ being one of them). Linking and everything works just fine, as long as I'm calling functions that don't belong to a class. My problem is that the functions I want the FORTRAN code to call belong to a class. I looked at the symbol table using nm and the function name is something ugly like this: 00000000 T _ZN9Interface7c_tabs_Ev FORTRAN won't allow me to call a function by that name, because of the underscore at the beginning, so I'm at a loss. The symbol for c_tabs when it's not in a class is quite simple, and FORTRAN has no problems with it: 00000030 T c_tabs_ Any suggestions? Thanks in advance.

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• I need help translating this portion of the ECMAScript grammar?

  - by ChaosPandion

  I've been working on my own implementation of ECMAScript for quite some time now. I have basically done everything by hand to help gain a deep understanding of the process. Repeated attempts to analyze and understand this portion of the grammar have failed so I've been working on the run time instead. Now I am at a point were I will be working on object literals so I really need to polish my syntactic analyzer. Can anyone put this in terms a language parser novice could understand? My biggest source of confusion is the following: new MemberExpression Arguments This is supposed to be a member expression, but this seemingly conflicts with the following: NewExpression : MemberExpression new NewExpression Is a new expression a member expression or a left hand side expression? To be honest I am having trouble laying out the proper C# classes for the concrete grammar. MemberExpression : PrimaryExpression FunctionExpression MemberExpression [ Expression ] MemberExpression . IdentifierName new MemberExpression Arguments NewExpression : MemberExpression new NewExpression CallExpression : MemberExpression Arguments CallExpression Arguments CallExpression [ Expression ] CallExpression . IdentifierName LeftHandSideExpression : NewExpression CallExpression

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• UITableView setting standalone delegate object?

  - by fuzzygoat

  Hi have setup a sample application using a UITableView. Initially I did this by conforming my controller to and , added a tableView in IB and connected "datasource" & "delegate" to Files Owner. It all works so thats good. What I have been trying out is creating my own class for the delegate. I created a new class and added and , but quickly found I could not connect the tableViewdataSource / delegate. To solve this I added an "Object" (NSObject) in IB and set it to my new class. I then connected the dataSource and delegate outlets to this object. It sort of works, the app runs and displays the tableView, but when I try and scroll the table the app crashes. Can I ask if I am going about this the right way? gary

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• datatable works in C# winform but not ASP.NET

  - by Charles Gargent

  Hi I have created a class that returns a datatable, when I use the class in a c# winform the dataGridView is populted corectly using the following code dataGridView1.DataSource = dbLib.GetData(); However when I try the same thing with ASP.NET I get a Object reference not set to an instance of an object. using the following code GridView1.DataSource = dbLib.GetData(); GridView1.DataBind(); What am I doing wrong / missing Thanks EDIT for the curios here is the dbLib class public static DataTable GetData() { SQLiteConnection cnn = new SQLiteConnection("Data Source=c:\\test.db"); SQLiteCommand cmd = new SQLiteCommand("SELECT count(Message) AS Occurances, Message FROM evtlog GROUP BY Message ORDER BY Occurances DESC LIMIT 25", cnn); cnn.Open(); SQLiteDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); DataTable dt = new DataTable(); dt.Load(dr); return dt; }

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• HQL join after output of subquery

  - by user350374

  Hey, Say I have 3 classes class foo1 { List prop1;} class foo2 { foo3 prop2;} class foo3{ int Id;} now I want to select distinct foo2's from foo1 and get Id of foo3. I need to write a HQL stmt for the same. I tried the following select c.Id from (select distinct(a.prop1) from foo1.prop1 as a ) as b inner join b.prop2 as c This throws an 'Antlr.Runtime.NoViableAltException How do you suggest I should go about the same. Please note the inner subquery is working fine. So if I have made some mistakes in there please ignore that. I need a method to do the latter. Thanks in Advance.

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• ObservableCollection Implementation

  - by wpfwannabe

  I know I am missing something obvious but I can't seem to implement ObservableCollection in my class below. IE it won't show up in intellsense. Can someone please let me know what I am missing. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; using System.Collections.ObjectModel; using System.Reflection; using System.ComponentModel; namespace MyBTOList { public class InventoryListBTO : List<InventoryBTO> { /// <summary> /// Get all inventory records from local database /// </summary> /// <returns></returns> public static InventoryListBTO GetAllInventoryRecords() { return GetInventoryListBO(Inventory.GetAllInventoryRecordsDb()); } } public class InventoryBTO : INotifyPropertyChanged { }

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• ASP.NET MVC 2: Deserialize SPROC Response

  - by dcolumbus

  I need to ask a general question. I don't have the code in front of me because I'm writing this on my iPhone. I have a Class that represents a certain XML schema. I have a SPROC that returns this XML. What I need to do is deserialize the XML to this Class. XML: <xml> <person> <firstName>Bob</firstName> <lastName>Robby</lastName> </person> </xml> I need to deserialize this XML into the custom Person Class so I can loop through this Model and spit it out in the View. I'm sure there's some kind of casting involved, I just don't know how to do it.

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• Coding a Tumblr Theme - List posts as list or just a stack of divs?

  - by Trippy

  I'm in the process of coding my own Tumblr Theme. Well I was wondering how should I list the posts? In the basic theme, (the one you get when you sign up) doesn't use list items (<li>). But I saw in another theme that it does use list items. By the way, this is what I mean... <div class="post-text"><div> <div class="post-audio"><div> ... or <ul> <li class="post-text"></li> ... </ul> I'm confused on the way I should go - I want to go to the semantic way of doing it because the theme will be built in HTML5.

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• Why is this if statement failing?

  - by Rawling

  I'm working on an existing class that is two steps derived from System.Windows.Forms.Combo box. The class overrides the Text property thus: public override string Text { get { return this.AccessibilityObject.Value; } set { if (base.Text != value) { base.Text = value; } } } The reason given for that "get" is this MS bug: http://support.microsoft.com/kb/814346 However, I'm more interested in the fact that the "if" doesn't work. There are times where "base.Text != value" is true and yet pressing F10 steps straight to the closing } of the "set" and the Text property is not changed. I've seen this both by just checking values in the debugger, and putting a conditional breakpoint on that only breaks when the "if" statement's predicate is true. How on earth can "if" go wrong? The class between this and ComboBox doesn't touch the Text property. The bug above shouldn't really be affecting anything - it says it's fixed in VS2005. Is the debugger showing different values than the program itself sees?

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• "partial views" best practices for 'container' divs?

  - by ropstah

  What is the 'best' way to handle the html markup for partial views? (which are also refreshed using AJAX) The biggest issue I run into is where to place the 'container' div... Consider having a masterpage and a partial view. (class="" could be interchanged with id="" depending if the partial is guaranteed to be unique, however this isn't really important to the issue i think) Masterpage: <div id="place1" class="placeholder"> <!-- render partial --> </div> Partial: <div id="partial1" class="partial"> <!-- content --> </div> I feel that something isn't being done right. However I cannot remove the div in the masterpage, because I need that to 'encapsulate' the response from AJAX partial updates. And also I cannot move the div in the partial to the masterpage, because that would require to move 'partial' info to the masterpage... How do you handle this?

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• "Reference required" error when referencing NServiceBus assembly from another project

  - by cwegrzyn

  We are trying to write an application that uses the NServiceBus library in a VB.NET environment. We've been stymied by errors similar to the following: Reference required to assembly 'NServiceBus, Version=2.0.0.1071, Culture=neutral, PublicKeyToken=9fc386479f8a226c' containing the implemented interface 'NServiceBus.IMessageHandler`1'. Add one to your project. Our project already includes references to NServiceBus.dll and NServiceBus.Core.dll from the same NServiceBus 2.0 RC2 distribution. Steps to reproduce: Create a new VB Class Library Project (.NET 3.5) Add NServiceBus.dll and NServiceBus.Core.dll as References. Put the following code in Class1.vb: Imports NServiceBus.Sagas.Impl Class Test Public Function Foo() As SagaMessageHandler Return Nothing End Function End Class You should now see the compiler error mentioned above. An identical project written in C# has no compile errors. Any ideas about how to solve this problem? (And, yes, my preferred solution is switching to C#, but no, that's not an acceptable one at the moment.)

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• How can I tell if a given hWnd is still valid?

  - by Ian P

  Please forgive my ignorance, I'm completely new when it comes to winforms programming. I'm using a third-party class that spawns an instance of Internet Explorer. This class has a property, hWnd, that returns the hWnd of the process. Later on down the line, I may want to reuse the instance of the application if it still exists, so I need to tell my helper class to attach to it. Prior to doing that, I'd like to know if the given hWnd is still valid, otherwise I'll spawn another instance. How can I do this in C# & .NET 3.5? Thanks for the help and I apologize if my winforms nomenclature is all wacky.. haha Ian

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• Eclipse doesn't see my new junit test

  - by morgancodes

  I'm using eclipse to run the tests in a single junit(4) test class. The tests in the class all run just fine. Then I add an additional test and run the class through the test running in ecplise again. Only the old tests are run. The new test isn't seen by eclipse. There's no error or anything, it's just as if eclipse is looking at an old version of the test. If I run the tests using maven, everything works fine. Additionally, after I run the tests in maven, ecplipse can see and run the new test correctly. Any ideas what's going on? Any ideas how to get ecplipse's test runner to see my new test cases?

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• Difference in linq-to-sql query performance using GenericRespositry

  - by Neil

  Given i have a class like so in my Data Layer public class GenericRepository<TEntity> where TEntity : class { [System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Select)] public IQueryable<TEntity> SelectAll() { return DataContext.GetTable<TEntity>(); } } I would be able to query a table in my database like so from a higher layer using (GenericRepositry<MyTable> mytable = new GenericRepositry<MyTable>()) { var myresult = from m in mytable.SelectAll() where m.IsActive select m; } is this considerably slower than using the usual code in my Data Layer using (MyDataContext ctx = new MyDataContext()) { var myresult = from m in ctx.MyTable where m.IsActive select m; } Eliminating the need to write simple single table selects in the Data layer saves a lot of time, but will i regret it?

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