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How do you set a default value for a MySQL Datetime column?
... need to ALWAYS specify a value for this column or the value will automatically reset itself to "now()" on update. This means that if you do not want the value to change, your UPDATE statement must contain "[your column name] = [your column name]" (or some other value) or the value will become "now(...
Catch multiple exceptions in one line (except block)
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Scraping html tables into R data frames using the XML package
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How do I enumerate the properties of a JavaScript object? [duplicate]
...JavaScript provides hasOwnProperty(), and this is why you should use it in order to ensure that third party code (or any other code that might modify a prototype) doesn't break yours. Apart from adding a few extra bytes of code, there is no downside to using hasOwnProperty().
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What is the difference between an int and an Integer in Java and C#?
...t store int or other non-object types in collections (List, Map, etc.). In order to store them, you must first box them up in its corresponding boxed type.
Java 5 onwards have something called auto-boxing and auto-unboxing which allow the boxing/unboxing to be done behind the scenes. Compare and co...
How do I execute a command and get the output of the command within C++ using POSIX?
...use the C stdio API, I prefer the iostreams API. popen requires you to manually clean up the FILE handle, pstreams do that automatically. popen only accepts a const char* for the argument, which requires care to avoid shell injection attacks, pstreams allows you to pass a vector of strings similar t...
What is the relationship between Looper, Handler and MessageQueue in Android?
... Also note that a thread can't be associated with more than one Looper. In order to guarantee this association, Looper is stored in thread-local storage, and it can't be created via its constructor directly. The only way to create it is to call prepare static method on Looper. prepare method first e...
c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术
...e <windows.h>
#include <atlstr.h>
#pragma comment(lib, "version")
int _tmain(int argc, _TCHAR* argv[])
{
LPCTSTR lpszModuleName = _T("C:\\Windows\\notepad.exe");
// Get the version information size for allocate the buffer
DWORD dwHandle;
DWORD dwDataSize = ::GetFileVersionIn...
一个宏命令，就可以程序崩溃时生成dump文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...pFile
{
void CreateDumpFile(LPCWSTR lpstrDumpFilePathName, EXCEPTION_POINTERS *pException)
{
// 创建Dump文件
//
HANDLE hDumpFile = CreateFile(lpstrDumpFilePathName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
//...
vc/mfc *通配符 批量删除文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...使用SHFileOperation函数：#include "stdafx.h"#include <windows.h>int _tmain(int argc, _TCHAR*...直接上代码，可直接运行亲测有效，使用SHFileOperation函数：
#include "stdafx.h"
#include <windows.h>
int _tmain(int argc, _TCHAR* argv[])
{
LPTSTR delFileName = L"c...