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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...y alignment constraints. Data structure alignment impacts both performance and correctness of programs:
Mis-aligned access might be a hard error (often SIGBUS).
Mis-aligned access might be a soft error.
Either corrected in hardware, for a modest performance-degradation.
Or corrected by emulation...
How to extract numbers from a string in Python?
...his is better than the regex example because you don't need another module and it's more readable because you don't need to parse (and learn) the regex mini-language.
This will not recognize floats, negative integers, or integers in hexadecimal format. If you can't accept these limitations, jmnas's...
How to make an Android Spinner with initial text “Select One”?
...ect One". When the user clicks the spinner, the list of items is displayed and the user selects one of the options. After the user has made a selection, the selected item is displayed in the Spinner instead of "Select One".
...
How to initialize all members of an array to the same value?
...s that value is 0 (in which case you can omit some part of the initializer
and the corresponding elements will be initialized to 0), there's no easy way.
Don't overlook the obvious solution, though:
int myArray[10] = { 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 };
Elements with missing values will be initiali...
Number of days in particular month of particular year?
...
Java 8 and later
@Warren M. Nocos.
If you are trying to use Java 8's new Date and Time API, you can use java.time.YearMonth class. See Oracle Tutorial.
// Get the number of days in that month
YearMonth yearMonthObject = YearMonth...
C# Thread safe fast(est) counter
...ment will have better performance than lock(). Just take a look at the IL and Assembly where you will see that Increment turns into a "bus lock" statement and its variable is directly incremented (x86) or "added" to (x64).
This "bus lock" statement locks the bus to prevent another CPU from acces...
std::enable_if to conditionally compile a member function
I am trying to get a simple example to work to understand how to use std::enable_if . After I read this answer , I thought it shouldn't be too hard to come up with a simple example. I want to use std::enable_if to choose between two member-functions and allow only one of them to be used.
...
How to properly seed random number generator
I am trying to generate a random string in Go and here is the code I have written so far:
9 Answers
...
Bring a window to the front in WPF
...
myWindow.Activate();
Attempts to bring the window to the foreground and activates it.
That should do the trick, unless I misunderstood and you want Always on Top behavior. In that case you want:
myWindow.TopMost = true;
...
What's the nearest substitute for a function pointer in Java?
...gFunction sf) {
int i = sf.func("my string");
// do whatever ...
}
And would be called like so:
ref.takingMethod(new StringFunction() {
public int func(String param) {
// body
}
});
EDIT: In Java 8, you could call it with a lambda expression:
ref.takingMethod(param -> ...