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What is Node.js? [closed]
...like everyone else? In Node.js, a new connection is just a very small heap allocation. Spinning up a new process takes significantly more memory, a megabyte on some platforms. But the real cost is the overhead associated with context-switching. When you have 10^6 kernel threads, the kernel has to do...
Is it safe to delete a void pointer?
...sually work because information is stored along with the pointer about the allocation itself, so the deallocator can return it to the right place. In this sense it is "safe" as long as your allocator uses internal boundary tags. (Many do.)
However, as mentioned in other answers, deleting a void ...
Getting a slice of keys from a map
...eys, k)
}
}
To be efficient in Go, it's important to minimize memory allocations.
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Try-catch speeding up my code?
...e "ephemeral" -- that is, just pushed and popped on the stack, rather than allocated a specific location on the stack for the duration of the activation. We believe that the JITter will be able to do a better job of register allocation and whatnot if we give it better hints about when locals can be ...
Difference between string and char[] types in C++
...
A char array is just that - an array of characters:
If allocated on the stack (like in your example), it will always occupy eg. 256 bytes no matter how long the text it contains is
If allocated on the heap (using malloc() or new char[]) you're responsible for releasing the memory...
Can an array be top-level JSON-text?
...ed value."
ECMA-404: Any JSON value. "A JSON text is a sequence of tokens formed from Unicode code points that conforms to the JSON value
grammar."
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Adding the little arrow to the right side of a cell in an iPhone TableView Cell
...exPath
Write below code:
if (cell ==nil) {
cell=[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
//For creating custom accessory view with own image
UIImageView *accessoryView = [[UIImageView alloc] initWithFrame:CGRec...
What is the maximum depth of the java call stack?
...
It depends on the amount of virtual memory allocated to the stack.
http://www.odi.ch/weblog/posting.php?posting=411
You can tune this with the -Xss VM parameter or with the Thread(ThreadGroup, Runnable, String, long) constructor.
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Asynchronously wait for Task to complete with timeout
...at runtime.
int timeout = 1000;
var task = SomeOperationAsync(cancellationToken);
if (await Task.WhenAny(task, Task.Delay(timeout, cancellationToken)) == task)
{
// Task completed within timeout.
// Consider that the task may have faulted or been canceled.
// We re-await the task so tha...
Is key-value observation (KVO) available in Swift?
...d in Using Key-Value Observing in Swift:
class MyObject {
private var token: NSKeyValueObservation
var objectToObserve = Foo()
init() {
token = objectToObserve.observe(\.bar) { [weak self] object, change in // the `[weak self]` is to avoid strong reference cycle; obviously, i...