Browse questions answered by Jon Skeet

No overload for method `destroyAfterCBEvent' takes `0' arguments

Error: No overload for method destroyAfterCBEvent' takes0' arguments What is the solution of above problem??? Chartboost.CBManager.didFailToLoadInterstitialEvent +=...

You're calling destroyAfterCBEvent, when you actually want to use a method group conversion to create a delegate to subscribe to the event. You need to take the brackets off (which is what makes it a method call). You... more 5/21/2014 5:54:41 AM

How to use Linq to check if a list of strings contains any string in a list

I'm constructing a linq query that will check is a string in the DB contains any of the strings in a list of strings. Something like. query = query.Where(x => x.tags ...

EDIT: This answer assumed that tags was a collection of strings... It sounds like you might want: var list = new List<string> { ... }; var query = query.Where(x => x.tags.Any(tag => list.Contains(tag)); Or: var list = new... more 5/20/2014 3:41:19 PM

When is a .NET assembly unloaded?

We know that a .NET assembly is loaded at the last possible moment - when you enter a method that references a something in the foreign assembly. When is an assembly unloaded? Is...

It's only unloaded when the AppDomain that it's loaded into is unloaded, e.g. as part of a web app recycling. Any classes within the assembly stay loaded while the assembly is loaded, so therefore they stick around until the AppDomain is... more 5/20/2014 3:04:47 PM

Interfaces can't be instantiated but is this an exception

I'm very surprised after seeing that I actually have to Instantiate an Interface to use the Word Interoop in C#. Microsoft.Office.Interop.Word.Application word = new...

It's because it's a COM interface. COM interfaces - and only COM interfaces - can be instantiated directly. The runtime will create an instance of the real type behind the scenes. Personally I think it's a bit ugly (and I can't find any... more 5/20/2014 2:58:15 PM

Thread 1 is executing in java synchronized method 1, can Thread 2 then execute in java synchronised method 2?

Was wondering if someone could help clear this up for me. (Student) Say we have two threads, "Thread1" & "Thread2". If Thread1 is executing in method 1 can Thread2 then...

There isn't a monitor associated with a specific method - there's a monitor associated with an object. So if you're trying to synchronize on the same object in both methods, the second thread will block until the first thread releases the... more 5/20/2014 2:42:55 PM

Why can I assign 0.0 to enumeration values, but not 1.0

Just out of curiosity: why can I assign 0.0 to a variable that is of an enumeration type, but not 1.0? Have a look at the following code: public enum Foo { Bar, ...

It's a bug that you can use 0.0. The compiler implicitly treats all constant expressions with a value of zero as just 0. Now, it's correct for the compiler to allow an implicit conversion from a constant int expression of 0 to your enum... more 5/20/2014 2:28:18 PM

how can I return a subclass reference from superclass method

I have a superclass method which returns itself(for builder pattern). This class has several subclasses , so I want to return a reference to actual(subclass) type of the object....

There's no particularly nice way of doing this, that I'm aware of. The best I've seen is just to cast - which you can do once, of course: public class Superclass<T extends Superclass<T>> { @SuppressWarnings("unchecked") ... more 5/20/2014 2:03:49 PM

LINQ , How to get Max ID with "where" condition

I have searched on stack overflow, but find example for max ID only , I want to find Max ID for some particular condition. Something like this var nRow = from p in...

Well if you really like query expressions, you can express the "filter and projection" and then use the Max extension method: var query = from p in ctx.FormControls where p.FormObjectsId == FormID select p.ID; var... more 5/20/2014 1:51:11 PM

How to assign one Action Listener to a couple of buttons?

button1.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent ae) { exite.setEnabled(true); ...

Just assign the ActionListener to a different variable first: ActionListener listener = new ActionListener() { ... more 5/20/2014 1:27:51 PM

"Constructor call must be the first statement in a constructor" getting error in Java code?

I am getting two errors in this code Constructor call must be the first statement in a constructor. Implicit super constructor Parent() is undefined. Must explicitly invoke...

There are four things you need to understand: If you don't specify any explicit constructor call, the compiler inserts a call to super() for you. There must be exactly one constructor call for any constructor- either explicit or the... more 5/20/2014 1:03:02 PM