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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...
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")
...
函数、变量需引入的头文件对照表（持续更新） - C/C++ - 清泛网 - 专注C/C+...
函数、变量需引入的头文件对照表（持续更新）GetModuleFileNameEx,GetModuleFileName#include <Psapi.h>ConvertStringSidToSid#include <sddl.h>memset, memcpy#include<string.h>FL...
GetModuleFileNameEx, GetModuleFileName
#include <Psapi.h>
ConvertStringSidToSid
#includ...
C/C++ 如何向上取整？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...nclude <math.h>int _tmain(int argc, _TCHAR* argv[]){int a = 6, b = 5; ceil函数printf("%d...一般地，向上取整有两种方法：
#include <math.h>
int _tmain(int argc, _TCHAR* argv[])
{
int a = 6, b = 5;
//ceil函数
printf("%d\n", (int)ceil((double)a / (double)b));
//补...