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Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...om scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import HtmlXPathSelector
from scrapy.http import Request
from selenium import selenium
class SeleniumSpider(CrawlSpider):
name = "SeleniumSpider"
start_urls = ["http://www.domain.com"]
rules = (
...
How can I restart a Java application?
...unches a new instance of application dirctly,
// remember to add some sleep to the start of the cmd file to make sure current instance is
// completely terminated, otherwise 2 instances of the application can overlap causing strange
// things:)
new ProcessBuilder("cmd","/c start /m...
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...
JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区，...
...p; Thread. sleep(100);//模拟处理
System. out.println(val);
}
 ...
What's the difference between Task.Start/Wait and Async/Await?
..."Button 2 Clicked");
}
private void DoSomethingThatTakesTime()
{
Thread.Sleep(10000);
}
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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...
How can I propagate exceptions between threads?
...n_ptr teptr = nullptr;
void f()
{
try
{
std::this_thread::sleep_for(std::chrono::seconds(1));
throw std::runtime_error("To be passed between threads");
}
catch(...)
{
teptr = std::current_exception();
}
}
int main(int argc, char **argv)
{
std::th...
What happens to a detached thread when main() exits?
...fter destruction of static variables the process will go into some kind of sleep state waiting for any remaining threads to finish. That is not true, after exit finishes destroying static objects, running atexit handlers, flushing streams etc. it returns control to the host environment, i.e. the pro...
Run php script as daemon process
...
while (!connection_aborted() || PHP_SAPI == "cli") {
//Code Logic
//sleep and usleep could be useful
if (PHP_SAPI == "cli") {
if (rand(5, 100) % 5 == 0) {
gc_collect_cycles(); //Forces collection of any existing garbage cycles
}
}
}
Working example:
[Uni...
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;
}
...