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  • How to get actual type of an derived class from its parent interface

    - by Tarik
    Hello people, Lets say we have a code portion like this : IProduct product = ProductCreator.CreateProduct(); //Factory Method we have here SellThisProduct(product); //... private void SellThisProduct(IProduct product) { //..do something here } //... internal class Soda : IProduct {} internal class Book : IProduct {} How can I infer which product is actually passed into SellThisProduct() method in the method? I think if I say GetType() or something it will probably return the IProduct type. Thanks...

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  • Simulink: type consistency errors

    - by stanigator
    Using this Simulink model file as a reference, I'm trying to figure out the two following errors: I have no idea what has gone wrong with the data type consistency/conversion problems. Do you know what the error messages mean exactly in the context of a model? It would be great to get an interpretation of the problem to solve it. Thanks in advance.

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  • Accessing C# Anonymous Type Objects

    - by Ali Kazmi
    Hi, How do i access objects of an anonymous type outside the scope where its declared? for e.g. void FuncB() { var obj = FuncA(); Console.WriteLine(obj.Name); } ??? FuncA() { var a = (from e in DB.Entities where e.Id == 1 select new {Id = e.Id, Name = e.Name}).FirstOrDefault(); return a; }

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  • Optional non-system type parameters

    - by Courtney de Lautour
    C#4.0 obviously brings optional parameters (which I've been waiting for, for quite some time). However it seems that because only system types can be const that I cannot use any class/struct which I have created, as an optional param. Is there a some way which allows me to use a more complex type as an optional parameter. Or is this one of the realities that one must just live with?

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  • Python3 function annotations for type hinting versus Boo

    - by b0lt
    I've started on a medium-sized project in python, and I decided to use python 3 because I'm not using any large external libraries and py3k has some nice new syntactic sugar and more importantly function annotations. However, it seems like none of WingIDE, Pydev, or pycharm actually have any support for type hinting using function annotations. If I want something resembling static typing in python, is switching to boo a reasonable option?

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  • Rails Atom builder xml.tag!("activity:object-type") error

    - by Anup
    I am creating a activity stream of my feeds according to the http://activitystrea.ms standard. I am using rails atom builder to create a valid atom feed, but when I use xml.tag!("activity:object-type", "http://activitystrea.ms/schema/1.0/person") the atom feed goes blank.On seeing the source I find the correct xml format from what I have found out the ":object" is giving the problem.

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  • get type of NSNumber

    - by okami
    I want to get the type of NSNumber instance. I found out on http://www.cocoadev.com/index.pl?NSNumber this: NSNumber *myNum = [[NSNumber alloc] initWithBool:TRUE]; if ([[myNum className] isEqualToString:@"NSCFNumber"]) { // process NSNumber as integer } else if ([[myNum className] isEqualToString:@"NSCFBoolean"]) { // process NSNumber as boolean } Ok, but this doesn't work, the [myNum className] isn't recognized by the compiler. I'm compiling for iPhone.

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  • Type 'xxx' is not defined, BC30002 error.

    - by devin M. arnold
    Hello, It is possible to create an instance of a C# class within a aspx.vb codebehind file? When I try this within the Page_Load event: Dim oFlow As New Flow(HttpContext.Current.Request) I get the Type 'Flow' is not defined. The Flow class itself is located here: App_Code/CSCode/Cust/Frm/Flow.cs There's no namespace associated with this class. Any suggestions would be greatly appreciated. cheers, devin

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  • Extension method on type

    - by Karsten
    Hi Is there a way to create an extension method for an type ? I only seem to be able to create them for instances. public static class MyExtensions { public static string Test(this string s) { return "test"; } } public class Test { static void TestIt() { string.Test(); // won't compile string s = null; s.Test(); } }

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  • How to Convert Type in Tuples

    - by Pradeep
    how to convert a String type to a Int i have a tuple and i want to convert it to a tuple which has different types tupletotuple :: (String,String,String) ->(String,Int,Int) tupletotuple (a,b,c) = (a,read(b),read(c)) i get this Error Msg Project tupletotuple ("cha",4,3) ERROR - Cannot infer instance * Instance : Num [Char] * Expression : tupletotuple ("cha",4,3)

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  • iphone com.apple.product-type.tool

    - by John Smith
    Hello I am having trouble compiling a static library for the iPhone. It worked in the past. It keeps saying "target specifies 'com.apple.product-type.tool' but there is no such product for the 'iphoneos' platform. I have rechecked the static compilation flag.

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  • Declaring object type as NSManagedObject or class name

    - by Don Fulano
    In Core Data, if I have a Person entity is there any difference between: NSManagedObject *aPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:[self managedObjectContext]]; or Person *aPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:[self managedObjectContext]]; Should aPerson be of type Person or NSManagedObject? Is there a difference?

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  • Java - how to design your own type?

    - by Walter White
    Hi all, Is it possible to design your own Java Type, say an extensible enum? For instance, I have user roles that a certain module uses and then a sub-package provides additional roles. What would be involved on the JDK side of things? Walter

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  • How Can I Detect A Data Type in AS3

    - by Jascha
    I'd like to make a call to a function and send either a string or an integer... function getImage(val:*):void{ if(val == String){ switch(val){ case'next': loadNext(); break; case'prev': loadPrev(); break } } }else{ loadImg(val); } } and vary my function accordingly... anyone know how to detect the parameter type? Thanks -J

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  • background image for input type="button"

    - by fusion
    i've been trying to change the background image of the input button through css, but it doesn't work. search.html: <input type="button" name="button" value="Search" onclick="showUser()" class="button"/> search.css: .button { background-image: url ('/image/btn.png') no-repeat; cursor:pointer; } what could be wrong? even inline-ing the css didn't seem to work.

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