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When to use virtual destructors?
...destructor called
So the destruction of the base pointer (which takes an allocation on derived object!) follows the destruction rule, i.e first the Derived, then the Base.
On the other hand, there is nothing like a virtual constructor.
...
What is the difference between `-fpic` and `-fPIC` gcc parameters?
... below 2GB. Programs that require more than 2GB
of data must use "malloc" or "mmap" to allocate the data in the
heap instead of in the program's data segment.
When generating code for shared libraries, -fpic implies
-msmall-data and -fPIC implies -mlarge-data.
...
What's the point of const pointers?
...
What does it matter where they point it, it is a pointer allocated on the stack? The function can't mess that up. It makes far more sense to use read-only pointers when dealing with pointer-to-pointers. It is not the same thing as int const! I'll downvote this just for that mislead...
How can I send large messages with Kafka (over 15MB)?
...
Yes. On the consumer side, you allocate fetch.message.max.bytes memory for EACH partition. This means that if you use a huge number for fetch.message.max.bytes combined with a large number of partitions, it will consume a lot of memory. In fact, since the ...
How do I tokenize a string in C++?
...ybe, but then we’re forced to perform (potentially redundant and costly) allocations.
Instead, C++ offers a plethora of ways to split strings based on arbitrarily complex delimiters, but none of them is encapsulated as nicely as in other languages. The numerous ways fill whole blog posts.
At its...
count vs length vs size in a collection
... - check source/documentation.
Capacity() - used to specifically refer to allocated space in collection and not number of valid elements in it. If type has both "capacity" and "size" defined then "size" usually refers to number of actual elements.
I think the main point is down to human language a...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
...ring> definitions ) {
// Create a buffer sufficiently large that re-allocations are minimized.
final StringBuilder sb = new StringBuilder( text.length() << 1 );
final TrieBuilder builder = Trie.builder();
builder.onlyWholeWords();
builder.removeOverlaps();
final St...
What is a segmentation fault?
...s doesn't happen always (with gcc being one of this compilers). Also, the allocated stack space is normally reused again, so I have heard of no operating systems that return unused stack pages to the system, making that space subject for a SIGSEGV, so I won't expect such a signal from mangling with...
What is string_view?
...or increasing the efficiency by avoiding unneeded copies (think of all the allocations and exceptions you can save).
The original C strings were suffering from the problem that the null terminator was part of the string APIs, and so you couldn't easily create substrings without mutating the underly...
Best practice using NSLocalizedString
...ic void staticInit_singleton()
{
singleton = [[LocalizationHandlerUtil alloc] init];
}
- (NSString *)localizedString:(NSString *)key comment:(NSString *)comment
{
// default localized string loading
NSString * localizedString = [[NSBundle mainBundle] localizedStringForKey:key value:key ...