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Sockets: Discover port availability using Java
...ort the port to check for availability
*/
public static boolean available(int port) {
if (port < MIN_PORT_NUMBER || port > MAX_PORT_NUMBER) {
throw new IllegalArgumentException("Invalid start port: " + port);
}
ServerSocket ss = null;
DatagramSocket ds = null;
try...
Get property value from string using reflection
...are incompatible
return (T) retval;
}
This will allow you to descend into properties using a single string, like this:
DateTime now = DateTime.Now;
int min = GetPropValue<int>(now, "TimeOfDay.Minutes");
int hrs = now.GetPropValue<int>("TimeOfDay.Hours");
You can either use these...
How do you reverse a string in place in C or C++?
...
The standard algorithm is to use pointers to the start / end, and walk them inward until they meet or cross in the middle. Swap as you go.
Reverse ASCII string, i.e. a 0-terminated array where every character fits in 1 char. (Or other non-multibyte charac...
Arrow operator (->) usage in C
...d C# so I am moving at a much faster pace). I was reading the chapter on pointers and the -> (arrow) operator came up without explanation. I think that it is used to call members and functions (like the equivalent of the . (dot) operator, but for pointers instead of members). But I am not e...
How to edit incorrect commit message in Mercurial? [duplicate]
...evision you want to modify. Choose Modify History->Import MQ. That will convert all the revisions up to and including the selected revision from Mercurial changesets into Mercurial Queue patches. Select the Patch you want to modify the message for, and it should automatically change the screen to...
Difference between `const shared_ptr` and `shared_ptr`?
I'm writing an accessor method for a shared pointer in C++ that goes something like this:
4 Answers
...
Dialog to pick image from gallery or from camera
...d upon selection, use the appropriate code.
To take picture from camera:
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePicture, 0);//zero can be replaced with any action code (called requestCode)
To pick photo from gallery:
Intent pickPhoto = new I...
Shortcut to create properties in Visual Studio?
...n tab twice. That would generate the field and the full property.
private int myVar;
public int MyProperty
{
get { return myVar;}
set { myVar = value;}
}
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...
Hidden features of Scala
... (1, 3.14159, "Hello, world")
The right hand expression creates a Tuple3[Int, Double, String] which can match the pattern (a, b, c).
Most of the time your patterns use extractors that are members of singleton objects. For example, if you write a pattern like
Some(value)
then you're implicitly...
A reference to the dll could not be added
...I used it but it has to do with registering COM servers so certain entry points need to be available. If regsvr32 fails the DLL doesn't provide those entry points and the DLL does not contain a COM component.
You only chance for using the DLL is to import it like any other non-.NET binary, e.g. whe...