大约有 2,300 项符合查询结果（耗时：0.0266秒） [XML]
Are lists thread-safe?
...[]
def add():
for i in range(count):
l.append(i)
time.sleep(0.0001)
def remove():
for i in range(count):
l.remove(i)
time.sleep(0.0001)
t1 = threading.Thread(target=add)
t2 = threading.Thread(target=remove)
t1.start()
t2.start()
t1.join()
t2.join()
print(...
php execute a background process
...", array(), $foo ) );
I tested this quickly from the command line using "sleep 25s" as the command and it worked like a charm.
(Answer found here)
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How to save and load cookies using Python + Selenium WebDriver
...ome-data")
driver.get('https://www.somedomainthatrequireslogin.com')
time.sleep(30) # Time to enter credentials
driver.quit()
$ cat work.py
#!/usr/bin/python3
import time
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_opti...
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...
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...
App Inventor 2 试验组件 · App Inventor 2 中文网
...发出错误信号。
第一项已删除时(值)
由 删除第一项 函数触发的事件。参数“值”是列表中第一个对象，现在已被删除。
以获得值时(标签,值)
表示 获取值 请求已成功。
收到标签列表时(值)
当我们收到已知标签列表时...
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)
...
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...