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Defining a variable with or without export
...ve values copied when the subprocess is created:
$ export B="Bob"; echo '(sleep 30; echo "Subprocess 1 has B=$B")' | bash &
[1] 3306
$ B="Banana"; echo '(sleep 30; echo "Subprocess 2 has B=$B")' | bash
Subprocess 1 has B=Bob
Subprocess 2 has B=Banana
[1]+ Done echo '(sleep 30; echo "S...
线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...HWND间的映射关系（合法的修改途径：映射可以被Cwnd成员函数Detach,Attach所改变），再者可以确保使用窗口的安全性,避免出现访问违规等状况,如使用临时对象就很容易出现这种断言失败。
每个界面线程都有自身的映射表，TLS(线...
Where can I set environment variables that crontab will use?
...ANG=nb_NO.UTF-8
LC_ALL=nb_NO.UTF-8
# m h dom mon dow command
* * * * * sleep 5s && echo "yo"
This feature is only available to certain implementations of cron. Ubuntu and Debian currently use vixie-cron which allows these to be declared in the crontab file (also GNU mcron).
Archlin...
How does lock work exactly?
...
No, they are not queued, they are sleeping
A lock statement of the form
lock (x) ...
where x is an expression of a reference-type, is precisely equivalent to
var temp = x;
System.Threading.Monitor.Enter(temp);
try { ... }
finally { System.Threading.Mo...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
...
I'm surprised no one has mentioned sleepsort yet... Or haven't I noticed it? Anyway:
#!/bin/bash
function f() {
sleep "$1"
echo "$1"
}
while [ -n "$1" ]
do
f "$1" &
shift
done
wait
example usage:
./sleepsort.sh 5 3 6 3 6 3 1 4 7
./sleep...
Selenium WebDriver: Wait for complex page with JavaScript to load
...en your page is finished processing you need to add a delay: e.g. click(), sleep(0.5 sec), wait until (readyState='complete' & jQuery.active==0). If you don't add the sleep, the iQuery will not be active at the test time! (it took me some hours to find out, so I thought to share it)
...
Smarty中date_format日期格式化详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...由php提供过来的时间秒进行转换成日期了，那么date_format函数到底怎么用有什么格式，我们一起来看看。...在php的smarty模板中date_format是对由php提供过来的时间秒进行转换成日期了，那么date_format函数到底怎么用有什么格式，我们...
What exactly are “spin-locks”?
...ge the process state from TASK_RUNNING into TASK_INTERRUPTIBLE (which is a sleeping state) and, thus, it does not save everything about that process (memory, cache and so on). instead, the spinning process is preempted, but it never quits the "immediately schedulable" processes: it is kept in memory...
Correct way to detach from a container without stopping it
...6]$ docker run -ti -d --name test python:3.6 /bin/bash -c 'while [ 1 ]; do sleep 30; done;'
b26e39632351192a9a1a00ea0c2f3e10729b6d3e22f8e0676d6519e15c08b518
[berto@g6]$ docker attach test
# here I typed ^P^Q
read escape sequence
# i'm back to my prompt
[berto@g6]$ docker kill test; docker rm -v te...
ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的另一个正则表达式类库）不同，CATLRegExp并没有在构造函数中提供初始化匹配字符串的方法，而是让使用者通过调用它的Parse()方法，使用正则表达式字符串作为参数，就可以构造出一个我们所需要的用于匹配的类，例如我们需...