大约有 45,000 项符合查询结果（耗时：0.0399秒） [XML]
Best implementation for hashCode method for a collection
...(f >>> 32));
If the field f is a float: calculate Float.floatToIntBits(f);
If the field f is a double: calculate Double.doubleToLongBits(f) and handle the return value like every long value;
If the field f is an object: Use the result of the hashCode() method or 0 if f == null;
If the field...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...). Secondly, the std::mutex is implemented in way that it spin locks for a bit before actually doing system calls when it fails to immediately obtain the lock on a mutex (which no doubt will be extremely slow). So what I have measured here is the absolute most ideal situtation and in practise lockin...
How do I choose between Semaphore and SemaphoreSlim?
...states that the SemaphoreSlim is a lightweight alternative and doesn't use Windows Kernel semaphores. This resource states that the SemaphoreSlim is much faster. In what situations does the SemaphoreSlim make more sense over the Semaphore and vice versa?
...
Open directory dialog
...e will be saved. I know that in WPF I should use the OpenFileDialog from Win32, but unfortunately the dialog requires file(s) to be selected - it stays open if I simply click OK without choosing one. I could "hack up" the functionality by letting the user pick a file and then strip the path to fig...
Why is an int in OCaml only 31 bits?
Haven't seen this "feature" anywhere else. I know that the 32nd bit is used for garbage collection. But why is it that way only for ints and not for the other basic types?
...
Run PHP Task Asynchronously
...on. It allows for forking PHP scripts and other scripts. Works on UNIX and Windows.
class BackgroundProcess {
static function open($exec, $cwd = null) {
if (!is_string($cwd)) {
$cwd = @getcwd();
}
@chdir($cwd);
if (strtoupper(substr(PHP_OS, 0, 3)) =...
Git Bash is extremely slow on Windows 7 x64
...
shoelzershoelzer
10.2k22 gold badges2626 silver badges4646 bronze badges
...
Base64 encoding and decoding in client-side Javascript
...s, adds the &0xff fix from Yaroslav, eliminates trailing nulls, plus a bit of code golf.
decodeBase64 = function(s) {
var e={},i,b=0,c,x,l=0,a,r='',w=String.fromCharCode,L=s.length;
var A="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for(i=0;i<64;i++){e[A.ch...
Version of Apache installed on a Debian machine
...
Worked fine on Red Hat Enterprise Linux 6 (64-bit)
– DemiSheep
Jan 26 '16 at 16:49
|
show 6 more comments
...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清泛网 - 专注IT技能提升
...RedirectedSetUnhandledExceptionFilter);
// Code that crashes
}
64 bit programs
The redirection procedure works for 32 bit code as well as for 64 bit code. The sample code provides 32 bit and 64 bit compiler targets.
Static vs. dynamic CRT linking
The code works only with dynamic CRT link...