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ggplot does not work if it is inside a for loop although it works outside of it [duplicate]
...even if the iterative value does not interfere with the ggplot function. Why is it so ?
1 Answer
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How to copy JavaScript object to new variable NOT by reference? [duplicate]
...fiddle here , where I pass a small JSON object to a new variable and modify the data from the original variable (not the new variable), but the new variable's data gets updated as well. This must mean that the JSON object was passed by reference, right?
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how to convert a string date into datetime format in python? [duplicate]
How do I convert a a string of datetime into datetime format in python so that it can be compared with another date?
2 Answ...
Visul C++中CList用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...CList的声明和构造方法
CList的声明如下:
template< class TYPE, class ARG_TYPE >class CList : public CObject
由此,我们知道CList是一个模版类,那么他的两个class是什么意思呢?
下面看一个例子:
CList<CString ,CString&> list;//链表对象1
CList<CStr...
mfc 画圆角矩形 - C/C++ - 清泛网 - 专注C/C++及内核技术
...->top, lprcRect->right + 1, lprcRect->bottom + 1, sizeRound.cx, sizeRound.cy );
if ( COLOR_TRANSPARENT == dwColorFrame && COLOR_TRANSPARENT != dwColorFill )
{
// fill it only
CBrush brushFill( dwColorFill );
FillRgn( pDC->GetSafeHdc(), hrgnFrame, brushFill );
}
else
{
...
解决MFC使用ShowWindow(SW_MAXIMIZE)任务栏被遮住的问题 - C/C++ - 清泛网 ...
...);
...
void CxxxDlg::OnGetMinMaxInfo(MINMAXINFO* pMMI)
{
// TODO: Add your message handler code here and/or call default
pMMI-> ptMaxSize.y = GetSystemMetrics(SM_CYFULLSCREEN) + GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CYDLGFRAME);
__super::OnGetMinMaxInfo(pMMI);
}
注意:D...
MFC 获取当前时间的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...);
CString strCurTime;
strCurTime.Format(_T("d/d/d d:d:d"), curTime.GetYear(), curTime.GetMonth(), curTime.GetDay(), curTime.GetHour(), curTime.GetMinute(), curTime.GetSecond());
2.SYSTEMTIME结构体获取当前时间
SYSTEMTIME curTime;
GetLocalTime(&curTime);
CString strCurTime;
strC...
记一次数据库表自增长(Auto Increment)故障 - 数据库(内核) - 清泛网 - ...
...int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
然后插入一行问题数据:
INSERT INTO test (id, name) VALUES (2147483647, 'x');
结果导致不能执行正常的插入语句:
INSERT INTO test (name) VALUES ('y');
此时数...
Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
Ora-00257 错误处理一列sqlplus assysdba报错ORA-12162切回系统确认系统当前的ORACLE_HOME和ORACLE_SID环境变量[oracle@asdlabdb01~]$echo$ORACLE_HOME空的[oracle...sqlplus /as sysdba
报错ORA-12162
切回系统
确认系统当前的ORACLE_HOME和ORACLE_SID环境变量
[oracle...
Linux下追踪程序退出(崩溃)思路 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...思路linux-issue-trackingLinux下追踪程序退出(崩溃)思路;history命令用法;linux下查看所有登录用户的历史操作命令。
Linux下程序退出(崩溃)时总会留下一些蛛丝马迹,问题追踪思路总结如下:
1、查看程序日志,确定退出(崩溃)时间...