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What is the difference between 'typedef' and 'using' in C++11?
...s be used in contexts which allows initialization statements
// C++11 (C++03) (init. statement in for loop iteration statements).
for(typedef int Foo; Foo{} != 0;) {}
// C++17 (if and switch initialization statements).
if (typedef int Foo; true) { (void)Foo{}; }
// ^^^^^^^^^^^^^^^ init-statement
...
How do I print to the debug output window in a Win32 app?
I've got a win32 project that I've loaded into Visual Studio 2005. I'd like to be able to print things to the Visual Studio output window, but I can't for the life of me work out how. I've tried 'printf' and 'cout
...
What is the fastest integer division supporting division by zero no matter what the result is?
... movl %eax, %ecx
popl %ebp
movl %edx, %eax
sarl $31, %edx
idivl %ecx
ret
As this turned out to be such a popular question and answer, I'll elaborate a bit more. The above example is based on programming idiom that a compiler recognizes. In the above case a boole...
How to initialize a private static const map in C++?
...
{
map<int,int> m;
m[1] = 2;
m[3] = 4;
m[5] = 6;
return m;
}
static const map<int,int> myMap;
};
const map<int,int> A:: myMap = A::create_map();
int main() {
}
...
How do you print in a Go test using the “testing” package?
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Pang
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answered Apr 21 '14 at 20:50
voidlogicvoidlogic
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What is the best algorithm for overriding GetHashCode?
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1630
I usually go with something like the implementation given in Josh Bloch's fabulous Effective Ja...
Format date and time in a Windows batch script
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33 Answers
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
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535
There's an old trick to do this with only one comparison/branch. Whether it'll really improve s...
How to generate keyboard events in Python?
... using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE =...
Best way to select random rows PostgreSQL
...1 + trunc(random() * 5100000)::int AS id
FROM generate_series(1, 1030) -- 1000 + few percent - adapt to your needs
LIMIT 1030 -- hint for query planner
) r
JOIN big b USING (id) -- eliminate miss
UNION -- e...