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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...
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手握利器,直面“蓝脸”! ——使用WinDbg抗击系统崩溃 - 操作系统(内核) - ...

...系统检测到引发崩溃的致命错误时,Windows自己执行崩溃函数“KeBugCheckEx”。该函数接受一个停止代码(STOP Code,也称为错误检查码“Bug Check Code”),以及四个根据停止代码来解释的参数(下文中会有图例)。在调用KeBugCheckEx之后,...
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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...
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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__...
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How to send SMS in Java

...+CMGS="+quotes + phoneNumber +quotes+ "\r\n"); try { Thread.sleep(2000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } // send("AT+CMGS=\""+ phoneNumber +"\"\r\n"); send(message + '\032'); S...
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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...
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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...
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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...
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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") ...
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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") ...