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What does `unsigned` in MySQL mean and when to use it?
...hen you need a larger upper
numeric range for the column. For
example, if an INT column is UNSIGNED,
the size of the column's range is the
same but its endpoints shift from
-2147483648 and 2147483647 up to 0 and 4294967295.
When do I use it ?
Ask yourself this question: Will this field...
How to use setInterval and clearInterval?
...le you can use to cancel it via clearTimeout before it fires that one time if appropriate.)
setTimeout(drawAll, 20);
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How to go to a URL using jQuery? [duplicate]
... will not work )
window.location.replace("http://www.google.com");
//like if you click on a link (it will be saved in the session history,
//so the back button will work as expected)
window.location.href = "http://www.google.com";
...
Laravel 4: how to “order by” using Eloquent ORM [duplicate]
...
If you are using post as a model (without dependency injection), you can also do:
$posts = Post::orderBy('id', 'DESC')->get();
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How to merge images in command line? [closed]
...
If you are lazy, convert -append *.png out.png
– ChillarAnand
Dec 29 '16 at 7:15
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How to reset index in a pandas dataframe? [duplicate]
...
DataFrame.reset_index is what you're looking for. If you don't want it saved as a column, then do:
df = df.reset_index(drop=True)
If you don't want to reassign:
df.reset_index(drop=True, inplace=True)
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ATL COM开发入门（二）（ActiveX/COM组件回调JS） - C/C++ - 清泛网 - 专注C/C++及内核技术
...一个新的接口：
BeginTiming函数体：
STDMETHODIMP CAtlDemoIf::BeginTiming(IDispatch* pIDispatch)
{
gIDispatch = pIDispatch;
UINT nRet = SetTimer(NULL, // handle to main window
ID_TIMER, // 定时器标识
1000, // 1 秒间隔
(TI...
mfc 画圆角矩形 - C/C++ - 清泛网 - 专注C/C++及内核技术
...rcRect->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
{
HRGN hrg...
C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术
...psa = SafeArrayCreate(vt, sizeof(sab)/sizeof(SAFEARRAYBOUND), sab);
if (NULL == psa)
{
throw;
}
/*通过指向数组的指针来对二维数组的元素进行间接赋值*/
long (*pArray)[2] = NULL;
HRESULT hRet = SafeArrayAccessData(psa, ...
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
...并显示。
{
m_pDemoView = new CDemoView;
ASSERT(m_pDemoView);
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_pDemoVi...