Does the method get called with a null value or does it give a null reference exception?
MyObject myObject = null;
myObject.MyExtensionMethod(); // <-- is this a null reference exception?
If this is the case I will never need to check my 'this' parameter for null?
I am new to photo apps, recently I am interested in making a sticker app like those can be seen in the appstore, I know I would need to use uiimagepickercontroller, uiscrollview and uigesturerecognizer.
However I wonder which code method should I use for the app to load multiple stickers? Should it be called programmatically? Is that I would need to use the if-statement, say if one sticker is loaded, the app will auto generate a new sticker on top of it?
I have a class (Class B) that inherits another class (Class A) that contains virtual methods.
Mistakenly, I omitted the override keyword when declaring a (supposed to be) overriding method in Class B.
Class A
public class ClassA{
public virtual void TestMethod(){
}
}
Class B
public class ClassB : ClassA{
public void TestMethod(){
}
}
The code compiled without a problem. Can anyone explain why?
I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.)
Is the check for (self.id != None) necessary and sufficient to guarantee the self record is new and not being updated? Any special cases this might overlook?
Why are these used prior to defining a method for a model?
@classmethod
@staticmethod
What is the difference between them? Are there others I should be aware of?
Must I use them?
What value is hashCode() method is returning in java?. i read that it is an memory reference of an object. when i print hascode value for new Integer(1), its 1. for String(a) - 97. so i confused. is it ascii or what type of value is?
I am using Eclipse v3.5.
In previous Eclipse versions i remember if i have defined a method with a parameter and didn't use it internally a warning appears, like this :
public void myMethod( int x ) {
// Didn't use x here so a warning appears at the x parameter.
}
But in v3.5 i do not see this warning. How can i enable it in Eclipse ?
How can I find out through reflection what is the string name of the method?
For example given:
class Car{
public void getFoo(){
}
}
I want to get the string "getFoo", something like the following:
Car.getFoo.toString() == "getFoo" // TRUE
in java is the name of a method a string? why or why not?
so if i have something like:
public static int METHODNAME (some parameters or not)
{
something to do ;
}
is METHODNAME a string?
We are using Java and Javascript to try to display a huge sheet with freeze panes, but it is being very difficult. Does someone know about a library, method, script or something, either free or commercial, to do this?
Thanks.
In my messages_controller I have the following private method:
def find_message_or_404(slug)
message = user.messages.find_by_slug(slug)
if message.nil?
raise Error404
end
message
end
I find it not elegant and not very Rubist. Is there a way to improve it?
Is there a default timeout for threads waiting on a synchronised method in Java? Some threads in my app are not completing as expected. Is there anyway to check whether threads have died as a result of timeouts?
What Could be the example scenarios to declare any class or any method as "final"? When do we need to do this?
Please give me some example to understand the practical use of "final"...
please guide me as I am a beginner in OOP
i'm playing around with c# reflection api. i can easily load type info of classes, methods etc. in an assembly.
now i wonder how can i load and read the code inside a method?
Hey guys,
while surfing through the web and through stackoverflow.com i found many posts in forums, etc. where this message occures in IE but not in the other browsers. the thing is, the resolutions vary widely and it's not clear for me what's the best way to avoid this problem.
So my question is, if anybody knows exactly, specificly what this message
Object doesn't support this property or method
means, causes, says ,...
thanks for help.
helle
What is the easiest way of pulling an excisting method out of it's class and into a new class using Visual studio 2010 / Resharper?
Edit: I use Resharper version 5.
I'm asking this question, because I can't figure out when I could find an use of this method.
If I've designed everything correctly then I should be able by the medium of normal returns and try catch clauses to handle all problems and end the application in a correct manner.
Am I wrong ?
I'm creating a VB.NET application that includes two radio buttons inside of a groupbox. If the first radio button is selected, a certain tab on a tab form should be enabled. If the second radio button is selected, that tab should be disabled.
Is there a groupbox method that monitors both radio buttons and fires when the selection changes? Or do I need to set up individual methods for each radio button?
Can PHP array passed POST method to catch in ASP.NET MVC?
Query string: WebAccess/ArrayTest?val[]=1&val[]=2&val[]=3
I write: ActionResult ArrayTest (String[] val)
But this only works if the query string to remove the "[]"