大约有 2,300 项符合查询结果(耗时:0.0153秒) [XML]

https://stackoverflow.com/ques... 

How to debug Lock wait timeout exceeded on MySQL?

...ws open inside InnoDB Main thread process no. 29956, id 1185823040, state: sleeping Number of rows inserted 6453767, updated 4602534, deleted 3638793, read 388349505551 0.25 inserts/s, 1.25 updates/s, 0.00 deletes/s, 2.75 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============...
https://stackoverflow.com/ques... 

“implements Runnable” vs “extends Thread” in Java

...(); Thread t1 = new Thread(rc); t1.start(); Thread.sleep(1000); // Waiting for 1 second before starting next thread Thread t2 = new Thread(rc); t2.start(); Thread.sleep(1000); // Waiting for 1 second before starting next thread Thread t3 = new ...
https://stackoverflow.com/ques... 

How to run functions in parallel?

... using Process.join like @aix's answer mentions. This is better than time.sleep(10) because you can't guarantee exact timings. With explicitly waiting, you're saying that the functions must be done executing that step before moving to the next, instead of assuming it will be done within 10ms which...
https://www.tsingfun.com/it/cpp/1414.html 

AfxGetApp->GetMainWnd() 与 AfxGetMainWnd() - C/C++ - 清泛网 - 专注C/C++及内核技术

...只不过不是主线程罢了.还有就是用API Createthread之类的函数创建的线程无法生成CWinThread对象.所以如果想使用CWinThread对象里的函数,以及一些全局函数进行操作,如上面的AfxGetMainWnd(),就必须用CWinThread对象的CreateThread函数,...
https://www.tsingfun.com/it/cpp/1577.html 

MFC OnKeyDown没反应,不响应键盘操作 - C/C++ - 清泛网 - 专注C/C++及内核技术

...键盘操作在MFC中添加键盘的消息响应,通常是通过OnKeyDown函数来完成消息的捕捉和响应。afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, U...在MFC中添加键盘的消息响应,通常是通过OnKeyDown函数来完成消息的捕捉和响应。 afx_msg void OnKeyDow...
https://www.tsingfun.com/it/cpp/1579.html 

ON_COMMAND_EX、ON_COMMAND区别 - C/C++ - 清泛网 - 专注C/C++及内核技术

...参数个数相同,含义一样。 但是扩展映射宏的消息处理函数的原型和对应的普通映射宏相比,有两个不同之处: 一是多了一个UINT类型的参数,另外就是有返回值(返回BOOL类型)。 回顾4.4.2章节,范围映射宏ON_COMMAND_RANGE的消...
https://www.tsingfun.com/it/cpp/2041.html 

error C2804:binary \'operator +\' has too many parameters - C/C++ - 清泛网 - 专注C/C++及内核技术

...方法:+操作符包括两个操作数,应该重载为普通非成员函数。 注意重载操作符的形参数目(包括成员函数的隐式 this 指针)与操作符的操作数数目相同。对称的操作符,如算术操作符、相等操作符、关系操作符和位操作符,最...
https://www.tsingfun.com/it/cpp/2100.html 

error: ‘std::ios_base::ios_base(const std::ios_base&)’ is private ...

... required here这个错误的原因大概是std::ios_base类的拷贝构造函数是私有的,从return s语句返回时缺少一个合成的构造拷贝构造函数完成流的复制。错误代...这个错误的原因大概是std::ios_base类的拷贝构造函数是私有的,从return s语句...
https://www.tsingfun.com/it/cpp/2102.html 

error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘c...

...dynamic_cast,它要求父类必须为多态的,即要求至少有一个虚函数,因此...在将父类型转换为子类型时,可以使用static_cast和dynamic_cast.如果使用dynamic_cast,它要求父类必须为多态的,即要求至少有一个虚函数,因此需要仔细检查类定义中有...
https://www.tsingfun.com/it/cpp/2145.html 

MFC的DDX和DDV技巧 - C/C++ - 清泛网 - 专注C/C++及内核技术

...5 };  int m_edit;  //}}AFX_DATA 2. 在 .CPP文件中的类构造函数告终代码处,增加数据成员变量的一些初始化代码 CMyDlg::CMyDlg(CWnd* pParent )    : CDialog(CMyDlg::IDD, pParent) { //{{AFX_DATA_INIT(CMyDlg) m_edit = 0; //}}AFX_DATA_INIT } 3. 在...