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Web-scraping JavaScript page with Python
...t webdriver
import time
driver = webdriver.Firefox()
driver.get(url)
time.sleep(5)
htmlSource = driver.page_source
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Code for decoding/encoding a modified base64 URL
...n for Xamarin without having to pull in a library.
– Sleeping_Giant
Aug 2 '18 at 16:43
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How to use shared memory with Linux in C
...te: %s\n", shmem);
} else {
printf("Parent read: %s\n", shmem);
sleep(1);
printf("After 1s, parent read: %s\n", shmem);
}
}
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What is the difference between a thread and a fiber?
...by the kernel, although a kernel thread can voluntarily release the CPU by sleeping if it wants. A kernel thread has the advantage that it can use blocking I/O and let the kernel worry about scheduling. It's main disadvantage is that thread switching is relatively slow since it requires trapping i...
技术人员如何创业《四》- 打造超强执行力团队 - 资讯 - 清泛网 - 专注C/C++...
...导更加容易这样。与其去管理团队还不如多花时间写几个函数来的实际。授权就是教人做事的方法，充分信任他能做好，并且知道和鼓励他不要怕错。授权后并不是不管了，还需要去跟踪进度保证他们执行到位。
建立积极正面...
How to open, read, and write from serial port in C?
...cking
write (fd, "hello!\n", 7); // send 7 character greeting
usleep ((7 + 25) * 100); // sleep enough to transmit the 7 plus
// receive 25: approx 100 uS per char transmit
char buf [100];
int n = read (fd, buf, sizeof buf); // read up t...
async/await - when to return a Task vs void?
...id AsyncMethod2(int num)
{
await Task.Factory.StartNew(() => Thread.Sleep(num));
}
Yes, use async and await here, they make sure your method still works correctly if an exception is thrown.
for more information see: http://msdn.microsoft.com/en-us/magazine/jj991977.aspx
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Add subdomain to localhost URL
...er (to work around the permissions).
– Lindsay-Needs-Sleep
Apr 4 '19 at 6:36
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C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
...障和线程本地存储优化。如果仔细观察，可以发现 Acquire 函数中使用顺序一致性内部屏障 pointer->target_ = ...，x86 平台上会翻译为 mfence 指令，与 lock add 指令相比也不遑多让。在读多写少的前提下，可以将读写两边的屏障替换为非...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...m -f ${LOCKFILE}; exit" INT TERM EXIT
echo $$ > ${LOCKFILE}
# do stuff
sleep 1000
rm -f ${LOCKFILE}
The trick here is the kill -0 which doesn't deliver any signal but just checks if a process with the given PID exists. Also the call to trap will ensure that the lockfile is removed even when ...