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Is file append atomic in UNIX?
...oposed Boost.AFIO which implements an asynchronous filesystem and file i/o C++ library.
Firstly, O_APPEND or the equivalent FILE_APPEND_DATA on Windows means that increments of the maximum file extent (file "length") are atomic under concurrent writers. This is guaranteed by POSIX, and Linux, FreeB...
Which is faster: while(1) or while(2)?
...ain until the program is somehow ended. This directly corresponds to the C/C++ code:
L2:
goto L2;
Edit:
Interestingly enough, even with no optimizations, the following loops all produced the exact same output (unconditional jmp) in assembly:
while(42) {}
while(1==1) {}
while(2==2) {}
while(4...
What is std::promise?
I'm fairly familiar with C++11's std::thread , std::async and std::future components (e.g. see this answer ), which are straight-forward.
...
Meaning of @classmethod and @staticmethod for beginner? [duplicate]
...string_date.split('-'))
date1 = Date(day, month, year)
For this purpose, C++ can implement such a feature with overloading, but Python lacks this overloading. Instead, we can use classmethod. Let's create another "constructor".
@classmethod
def from_string(cls, date_as_string):
da...
Printing 1 to 1000 without loop or conditionals
...
Well, the code in this answer is obviously neither C nor C++, so this is fine only if we scrap the requirement. Then any answer may qualify because a hypothetical compiler might just produce the required program from any input.
– eq-
Jan 3 '11...
Difference between shared objects (.so), static libraries (.a), and DLL's (.so)?
...
Not the answer you're looking for? Browse other questions tagged c++ c linux dll linker or ask your own question.
How are strings passed in .NET?
...ould be Foo(char** bar) (or Foo(char*& bar) or Foo(string& bar) in C++). Sure, it's not how you should think of it everyday, but it actually helped me finally understand what is happening under the hood.
– Cole Johnson
Oct 12 '14 at 2:01
...
Do sealed classes really offer performance Benefits?
... they'd either need to modify C# to allow ((string)null).methodCall() like C++ does, or they'd need to statically prove that the object wasn't null (which they could do, but haven't bothered to)
– Orion Edwards
Sep 18 '18 at 3:10
...
How to find the kth smallest element in the union of two sorted arrays?
...
I've converted your code to C++. It seems to work
– jfs
Jul 27 '12 at 3:54
...
What are copy elision and return value optimization?
...pyable, e.g. because they have a private or deleted copy/move constructor.
C++17: As of C++17, Copy Elision is guaranteed when an object is returned directly:
struct C {
C() {}
C(const C&) { std::cout << "A copy was made.\n"; }
};
C f() {
return C(); //Definitely performs copy elis...