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Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
...1.4, not in 1.5, and not in 1.7. If you had it in there, it was added manually by someone - it is not added by django-admin startproject.
– wim
Oct 11 '16 at 16:54
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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
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Usually what you choose will depend on which methods you need access to. In general - IEnumerable<> (MSDN: http://msdn.microsoft.com/en-us/library/system.collections.ienumerable.aspx) for a list of objects that only needs ...
push_back vs emplace_back
...h_back(Type&& _Val).
But the real C++0x form of emplace_back is really useful: void emplace_back(Args&&...);
Instead of taking a value_type it takes a variadic list of arguments, so that means that you can now perfectly forward the arguments and construct directly an object into a ...
What is the Scala identifier “implicitly”?
...Implicit Views). In this case, the compiler looks for implicit members, locally defined in the current or enclosing scopes, inherited, or imported, that are either Functions from the type of that the.prefix to a type with selection defined, or equivalent implicit methods.
scala> 1.min(2) // Int ...
std::vector find查找方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...了后面的括号，否则报如下错误：
error C3867: “std::vector<_Ty>::end”: 函数调用缺少参数列表；请使用“&std::vector<_Ty>::end”创建指向成员的指针vector find
解决：调MFC dll时发生AfxGetInstanceHandle()断言错误 - C/C++ - 清泛网 -...
...DLL函数入口等）添加以下两行代码
afxCurrentInstanceHandle = _AtlBaseModule.GetModuleInstance();
afxCurrentResourceHandle = _AtlBaseModule.GetResourceInstance();AfxGetInstanceHandle 断言
MFC对话框中处理Enter或Esc按键事件方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
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BOOL CxxxDlg::PreTranslateMessage(MSG* pMsg)
{
if (pMsg->message == WM_KEYDOWN)
{
switch(pMsg->wParam)
{
case VK_ESCAPE: //Esc按键事件
return TRUE;
case VK_RETURN: //Enter按键事件
OnBnClickedButton1();
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coinitialize失败，返回值是0x80010106 无法在设置线程模式后对其加以更改 ...
...调用CoInitialize()不当所致。遂改用
CoInitializeEx(NULL, COINIT_MULTITHREADED);
问题得以解决。
CoInitialize、CoInitializeEx都是windows的API，主要是告诉windows以什么方式为程序创建COM对象，原因是程序调用com库函数（除CoGetMalloc和内存分配...
解决MFC使用ShowWindow(SW_MAXIMIZE)任务栏被遮住的问题 - C/C++ - 清泛网 ...
解决MFC使用ShowWindow(SW_MAXIMIZE)任务栏被遮住的问题重载OnGetMinMaxInfo消息处理函数解决，代码如下：BEGIN_MESSAGE_MAP(CxxxDlg, CDialogEx)...ON_WM_GETMINMAXINFO()END_MESSAGE_MAP()...a...重载OnGetMinMaxInfo消息处理函数解决，代码如下：
BEGIN_MESSAGE_MAP(Cx...
MFC GDI获取文字的宽度及高度 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ULL));
if (pDC)
{
CFont* pOldFont = pDC->SelectObject(&m_Font);
//size即为指定字体下给定文字的尺寸大小了
CSize size = pDC->GetTextExtent(_T(" XXXXXXXXXXXX "), 14);
//pDC->GetTextExtent(_T(" XXXXXXXXXXXX "));效果也是一样的
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