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'is' versus try cast with null check
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{
var myObjRef = (MyType)myObj.myProp; // needs to be cast a second time
// before using it as a MyType
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}
to this:
var myObjRef = myObj.myProp as MyType; // only one cast
if (myObjRef != null)
{
// myObjRef is already MyType and doesn't ne...
List or IList [closed]
Can anyone explain to me why I would want to use IList over List in C#?
18 Answers
18
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Namespace and class with the same name?
I'm organizing a library project and I have a central manager class named Scenegraph and a whole bunch of other classes that live in the Scenegraph namespace.
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Add Keypair to existing EC2 instance
...very, if it's an EBS boot AMI, you can stop it, make a snapshot of the volume. Create a new volume based on it. And be able to use it back to start the old instance, create a new image, or recover data.
Though data at ephemeral storage will be lost.
Due to the popularity of this question and an...
What's “requestCode” used for on PendingIntent?
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requestCode is used to retrieve the same pending intent instance later on (for cancelling, etc).
Yes, my guess is the alarms will override each other. I would keep the request codes unique.
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What are the uses of “using” in C#?
User kokos answered the wonderful Hidden Features of C# question by mentioning the using keyword. Can you elaborate on that? What are the uses of using ?
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What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?
When I try to use a print statement in Python, it gives me this error:
8 Answers
8
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Things possible in IntelliJ that aren't possible in Eclipse?
...iables in Java code, but in Spring configuration (you can click on class name, or property, or bean name), in Hibernate (you can click on property name or class, or included resource), you can navigate within one click from Java class to where it is used as Spring or Hibernate bean; clicking on incl...
How to make vi redraw screen?
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control+L seems does not work for me; I have to reset terminal first. not know why....
– Sam Liao
Jul 13 '09 at 4:48
7
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Cross-thread operation not valid: Control accessed from a thread other than the thread it was create
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As per Prerak K's update comment (since deleted):
I guess I have not presented the question properly.
Situation is this: I want to load data into a global variable based on the value of a control. I don't want to change the value of a control from the ...