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What HTTP status response code should I use if the request is missing a required parameter?
I am thinking 412 (Precondition Failed) but there may be a better standard?
12 Answers
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ALTER TABLE without locking the table?
When doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", li...
Finding index of character in Swift String
It's time to admit defeat...
32 Answers
32
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Logout: GET or POST?
This question is not about when to use GET or POST in general; it is about which is the recommended one for handling logging out of a web application. I have found plenty of information on the differences between GET and POST in the general sense, but I did not find a definite answer for this parti...
Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
One mistake I see people making over and over again is trying to parse XML or HTML with a regex. Here are a few of the reasons parsing XML and HTML is hard:
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What are the most common naming conventions in C?
What are the naming conventions commonly use in C? I know there are at least two:
11 Answers
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Are there any smart cases of runtime code modification?
Can you think of any legitimate (smart) uses for runtime code modification (program modifying it's own code at runtime)?
1...
c/c++浮点输出时，不显示小数点后没用的0 - C/C++ - 清泛网 - 专注C/C++及内核技术
c/c++浮点输出时，不显示小数点后没用的0用%g格式符就可以了。%g用来输出实数，它根据数值的大小，自动选f格式或e格式（选择输出时占宽度较小的一种），且不输出无意义的0。即%g是 用%g格式符就可以了。%g用来输出实数，...
CListCtrl 行高设置，自定义行高 - C/C++ - 清泛网 - 专注C/C++及内核技术
...sureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
if (m_nRowHeight>0)
{
lpMeasureItemStruct->itemHeight = m_nRowHeight;
}
}
void CMyListCtrl::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
CListCtrl::OnMeasureItem(nIDCtl, lpMeasureItemStruct...
MFC Dialog中嵌入View、动态创建View的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...oView);
if (!((CView*)m_pDemoView)->Create(NULL, NULL, WS_CHILD, CRect(0, 0, 0, 0), this, NULL, NULL))
{
AfxMessageBox(_T("Create view failed"));
return;
}
...
//显示FormView
m_pDemoView->MoveWindow(rect);
m_pDemoView->ShowWindow(SW_SHOW);
m_pDemoView->OnInitialUpdate(); //...