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How to create a loop in bash that is waiting for a webserver to respond?
...v/null --silent --head --fail http://myhost:myport); do
printf '.'
sleep 5
done
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Handling InterruptedException in Java
... as Callable, or follow the second approach above.
Calling Thread.sleep: You're attempting to read a file and the spec says you should try 10 times with 1 second in between. You call Thread.sleep(1000). So, you need to deal with InterruptedException. For a method such as tryToReadFile it ma...
What is the difference between packaged_task and async
...gave shows the differences if you use a rather long function, such as
//! sleeps for one second and returns 1
auto sleep = [](){
std::this_thread::sleep_for(std::chrono::seconds(1));
return 1;
};
Packaged task
A packaged_task won't start on it's own, you have to invoke it:
std::packaged...
Python: Making a beep noise
...more pythonic manner :
import os
beep = lambda x: os.system("echo -n '\a';sleep 0.2;" * x)
beep(3)
Notes :
the sleep value (here 0.2), depends on the length (seconds) of your default beep sound
I choosed to use os.system rather then subprocess.Popen for simplicity (it could be bad)
the '-n' for...
RuntimeError on windows trying python multiprocessing
...cess
import time
start = time.perf_counter()
def do_something(time_for_sleep):
print(f'Sleeping {time_for_sleep} second...')
time.sleep(time_for_sleep)
print('Done Sleeping...')
p1 = Process(target=do_something, args=[1])
p2 = Process(target=do_something, args=[2])
if
__name__...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...et<>()来访问元组的元素。通过下面这段程序来认识这两个函数的用法：
#include <iostream>
#include <tuple>
#include <functional>
int main()
{
auto t1 = std::make_tuple(10, "Test", 3.14);
std::cout << "The value of t1 is "
<< "(" << std::get<0...
error LNK2019: 无法解析的外部符号 __imp__PlaySoundW@12，该符号在函数 \...
...or LNK2019: 无法解析的外部符号 __imp__PlaySoundW@12，该符号在函数 "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) 中被引用#include <mmsystem.h>#pragma comment(lib, "WINMM.LIB")
#include <mmsystem.h>
#pragma comment...
SHFileOperation 这个API函数怎么用起来结果飘忽不定？ - C/C++ - 清泛网 -...
SHFileOperation 这个API函数怎么用起来结果飘忽不定？SHFileOperation方法有时不起作用，用起来结果飘忽不定，路径末尾加上' 0'也一样，笔者亲测，删除有时成功有时失败。解决：改用C++...SHFileOperation方法有时不起作用，用起来结果...
error LNK2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8，该符号在...
...2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8，该符号在函数 _wmain 中被引用GetFileVersionInfoSize build时出现link2019 链接错误：#pragma comment(lib, "version")解决。GetFileVersionInfoSize build时出现link2019 链接错误：
#pragma comment(lib, "version")
...
error LNK2019: 无法解析的外部符号 _Netbios@4,该符号在函数 中被引用 - C...
error LNK2019: 无法解析的外部符号 _Netbios@4,该符号在函数 中被引用解决方法如下：Cpp文件include语句之后加上如下代码：#pragma comment(lib,"netapi32.lib")解决方法如下：
Cpp文件include语句之后加上如下代码：
#pragma comment(lib,"netapi32.lib")
...