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What is the difference between 'my' and 'our' in Perl?
...ber the sort function?
2. Lexical or global?
I was a C programmer before starting using Perl, so the concept of lexical and global variables seems straightforward to me: it just corresponds to auto and external variables in C. But there're small differences:
In C, an external variable is a variab...
Java Multiple Inheritance
...al class of birds, Avialae). I also don't recommend to use interface names starting with a capital 'I', such as IBird, which just tells nothing about why you need an interface. That's the difference to the question: construct the inheritance hierarchy using interfaces, use abstract classes when usef...
Keyboard Interrupts with python's multiprocessing Pool
...rt of a loop that would check the status of each child process, and then restart certain processes on a delay if necessary. Rather than join() that would wait on all processes to complete, it would check on them individually, ensuring that the master process stayed responsive.
...
Resize HTML5 canvas to fit window
...ent for drawing.
context = htmlCanvas.getContext('2d');
// Start listening to resize events and draw canvas.
initialize();
function initialize() {
// Register an event listener to call the resizeCanvas() function
// each time the window is resize...
How to timeout a thread
...xecutor.submit(new Task());
try {
System.out.println("Started..");
System.out.println(future.get(3, TimeUnit.SECONDS));
System.out.println("Finished!");
} catch (TimeoutException e) {
future.cancel(true);
System.out.println...
When should I use Debug.Assert()?
...e idea is that with my private methods, I'm the one under control, so if I start calling one of my own private methods with parameters that are incorrect, then I've broken my own assumption somewhere--I should have never gotten into that state. In production, these private asserts should ideally be ...
Dependency injection through constructors or property setters?
...y method of the class use all the dependencies? If not, then that's a good starting point to see where the class could be split up.
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NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder
...ASE;
return "samsung".equalsIgnoreCase(deviceMan) && deviceRel.startsWith("4.2.2");
}
Then in the activity's onCreate method:
if (isSamsung_4_2_2()) {
setContentView(R.layout.activity_main_no_toolbar);
} else {
setContentView(R.layout.activity_main);
}
As pointed out this is...
What's the difference between backtracking and depth first search?
...acktracking related to searching tree structures. From Wikipedia:
One starts at the root (selecting some node as the root in the graph case) and explores as far as possible along each branch before backtracking.
It uses backtracking as part of its means of working with a tree, but is limited ...
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
...
Because of Dennis Ritchie
I started using for (;;) because that's the way Dennis Ritchie does it in K&R, and when learning a new language I always try to imitate the smart guys.
This is idiomatic C/C++. It's probably better in the long run to get ...