大约有 3,000 项符合查询结果（耗时：0.0362秒） [XML]
C# vs C - Big performance difference
...mance.
Once you perform the correct optimizations in the compiler, I get .72 seconds for the C++ application and 1.16 seconds for the C# application (both in release build). Since the C# application is very basic and allocates the memory used in the loop on the stack and not on the heap, it is actu...
The quest for the Excel custom function tooltip
... Description = "is the second number that will be added")]
double v2)
{
return v1 + v2;
}
we get both the function description
and when selecting the function, we get argument help
That looks nice, but it's all still very flaky, only works on my machine and sometimes crashes Exc...
Hidden features of mod_rewrite
...d subsequent passes). However, the [END] flag is only available for Apache v2.3.9+, so if you have v2.2 or lower, you're stuck with just the [L] flag.
For earlier versions, you must rely on RewriteCond statements to prevent matching of rules on subsequent passes of the URL parsing engine.
# Only...
Why do we need virtual functions in C++?
...main() -> int
{
Number const a( 3.14 );
Number const b( 2.72 );
Number const c( 1.0 );
Sum const sum_ab( &a, &b );
Sum const sum( &sum_ab, &c );
cout << sum.value() << endl;
}
In the line commented as “bad” the Expre...
Mark error in form using Bootstrap
...lp-block">Woohoo!</span>
</div>
</form>
Bootstrap v2
See the live version on jsfiddle
The .error, .success, .warning and .info classes are appended to the .control-group. This is standard Bootstrap markup and styling in v2. Just follow that and you're in good shape. Of c...
Retrieve specific commit from a remote Git repository
...ny object at all. (Defaults to false).
See commit f8edeaa (Nov. 2016, Git v2.11.1) by David "novalis" Turner (novalis):
upload-pack: optionally allow fetching any sha1
It seems a little silly to do a reachabilty check in the case where we
trust the user to access absolutely everything in...
How do I expire a PHP session after 30 minutes?
...php
if (isset($_POST['submit'])) {
$v1 = "FirstUser";
$v2 = "MyPassword";
$v3 = $_POST['text'];
$v4 = $_POST['pwd'];
if ($v1 == $v3 && $v2 == $v4) {
$_SESSION['luser'] = $v1;
$_SESSION['start'] = time(); // Taking now logged...
What is the best (and safest) way to merge a Git branch into master?
...ample, for advanced operations, please refer to http://git-scm.com/book/en/v2/Git-Branching-Rebasing
git checkout master
git pull
git checkout test
git pull
git rebase -i master
git checkout master
git merge test
Yep, when you have uppers done, all the Test branch's commits will be moved onto the...
Swift 和 .Net 开源，回顾 2015 年 9 大开源事件 - 开源 & Github - 清泛网 - 专注IT技能提升
...开源了很多其他的软件。
今年，Google 开源了人工智能（AI）发动机 TensorFlow，该公司表示“该系统最初是由 Google 机器智能研究组织下的 Google Brain 团队的研究人员和工程师为机器学习和深度神经网络而开发的系统，但该系统是...
Difference between datetime and timestamp in sqlserver? [duplicate]
...ffected?I want to ask this because i want to use it as reminder that a certain time has elapsed.i have a question here stackoverflow.com/questions/30302234/…
– Brownman Revival
May 19 '15 at 2:38
...