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Oracle Differences between NVL and Coalesce
Are there non obvious differences between NVL and Coalesce in Oracle?
8 Answers
8
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Which is the best library for XML parsing in java [closed]
...4j by myself but just wanted to know - Does java has other (Good) open source xml parsing libraries? and how's your experience with dom4j?
...
How can I reverse a NSArray in Objective-C?
...n immutable object but actual return a mutable object is a dangerous practice to get into.
– Christine
Jul 2 '12 at 22:46
3
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Run/install/debug Android applications over Wi-Fi?
...to view Android screen remotely without root? - Post #9.
Connect the device via USB and make sure debugging is working;
adb tcpip 5555. This makes the device to start listening for connections on port 5555;
Look up the device IP address with adb shell netcfg or adb shell ifconfig with 6.0 and high...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...float contains: "<< myfloat <<std::endl;
std::get<0>(mytuple) = 100;//修改tuple的值
std::cout <<"After assignment myint contains: "<< std::get<0>(mytuple) << std::endl;
return 0;
}
运行结果：
myint contains: 10
mychar contains: a
myfloat contains: 2.6
After assignment myi...
Visul C++中CList用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...了其对象list，那么在文档的Serialize(CArchive& ar)只需作如下修改：
void CDdfDoc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
list.Serialize(ar);
}
else
{
list.Serialize(ar);
}
}
这样，就实现了文档的串行化，如果使用mfc生成的框架...
VC 对话框背景颜色、控件颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
控件颜色：
对于分布在对话框上的控件，我们可以修改其颜色、其背景颜色，比如对静态文本、文本编辑框、列表框等等。
步骤①、②同上方法三中的步骤①、②。
步骤③：利用ClassWizard重载OnCtlColor(…)（即WM_CTLCOLOR消...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。 - C/C++ - 清泛网 ...
...针
//*(intg.get()) = *(p.get()); // 原指针不释放，仅修改原指针指向的内容
}
int _tmain(int argc, _TCHAR* argv[])
{
{
std::shared_ptr<int> sp(new int(2));
intg = sp;
}
std::shared_ptr<int> sp22(new int(...
error: ISO C++ forbids declaration of \'XXXX\' with no type - C/C++ - 清泛网 - 专注C/C++及内核技术
...决方法：在声明对象的类名称前追加关键字“class”，即修改如下：
mainwindow.cpp
#include "configdialog.h"
class MainWindow {
class ConfigDialog *configDialog;
};
configdialog.cpp
#include "mainwindow.h"
class ConfigDialog {
class MainWindow *mainWindow;
};
...
MFC窗口设置TopMost置顶的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...() & WS_EX_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
方法二：修改rc文件
IDD_xxx_DIALOG DIALOG 0, 0, 100, 60
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_TOPMOST
CAPTION "xxxx"MFC 窗口 TopMost 置顶