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What does `kill -0 $pid` in a shell script do?
...Kill the process if it exists and accepts signals from
# the current user.
sleep 60 &
pid=$!
kill -0 $pid && kill $pid
# Check if a PID exists. When missing, this should result
# in output similar to:
# bash: kill: (6228) - No such process
# Exit status: 1
kill -0 $pid; echo "Exit...
UITableView load more when scrolling to bottom like Facebook application
... {
DispatchQueue.global(qos: .utility).async {
sleep(3)
DispatchQueue.main.async { [weak self] in
self?.activityIndicator.stop()
}
}
}
}
}
Full Sample
Do not forget to paste the solution cod...
Example for boost shared_mutex (multiple reads/one write)?
... unique lock
cout << "11" << endl;
boost::this_thread::sleep(boost::posix_time::seconds(1));
lock2.unlock();
}
void main() {
cout << "1" << endl;
SharedLock lock1(tempLock); // (1) aquire a shared lock
cout << "2" << endl;
boost::threa...
Node.js spawn child process and get terminal output live
I have a script that outputs 'hi', sleeps for a second, outputs 'hi', sleeps for 1 second, and so on and so forth. Now I thought I would be able to tackle this problem with this model.
...
How to install Android SDK Build Tools on the command line?
... update Android SDK on headless server FILTER=tool,platform,android-20 ( sleep 5 && while [ 1 ]; do sleep 1; echo y; done ) \ | android update sdk --no-ui --all \ --filter ${FILTER} </code></pre>
– i4niac
Aug 27 '14 at 0:01
...
LINQPad [extension] methods [closed]
... index = 0; index <= 100; index++)
{
pb.Percent = index;
Thread.Sleep(100);
}
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Can I do a synchronous request with volley?
...
This solution blocks my thread forever, changed Thread.sleep instead of countDownLatch and problem solved
– snersesyan
Jul 25 '18 at 15:24
...
What happens to an open file handle on Linux if the pointed file gets moved or deleted
...1;
}
// close or remove file(remove usb device)
// close(fd);
sleep(5);
if(!check_fd_fine(fd)) {
printf("fd okay!\n");
} else {
printf("fd bad!\n");
}
close(fd);
return 0;
}
...
PHP: Storing 'objects' inside the $_SESSION
...nical advantages gained by being stateless. This is not something to lose sleep over unless you know in advance that you ought to be losing sleep over it.
I am especially flummoxed by the blessing received by the "double whammy" arguments put forth by Hank Gay. Is the OP building a distributed an...
What is the difference between mutex and critical section?
...up to full speed after it decides to slow down, which it may not do if you sleep or wait for only a millisecond.
– Stevens Miller
Aug 15 '16 at 18:14
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