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ReactJS: Modeling Bi-Directional Infinite Scrolling
...render them, it's really cheap to just allocate them and discard them. If 10k allocations is too big, you can instead pass a function that takes a range and return the elements.
<List>
{thousandelements.map(function() { return <Element /> })}
</List>
Your List component is kee...
jQuery : eq() vs get()
...
answered Jan 17 '11 at 3:09
StevenSteven
16.8k1212 gold badges5959 silver badges112112 bronze badges
...
[] and {} vs list() and dict(), which is better?
...s/dicts:
>>> from timeit import timeit
>>> timeit("[]")
0.040084982867934334
>>> timeit("list()")
0.17704233359267718
>>> timeit("{}")
0.033620194745424214
>>> timeit("dict()")
0.1821558326547077
and for non-empty:
>>> timeit("[1,2,3]")
0.243...
Python: Append item to list N times
...
For immutable data types:
l = [0] * 100
# [0, 0, 0, 0, 0, ...]
l = ['foo'] * 100
# ['foo', 'foo', 'foo', 'foo', ...]
For values that are stored by reference and you may wish to modify later (like sub-lists, or dicts):
l = [{} for x in range(100)]
(Th...
What does tilde-greater-than (~>) mean in Ruby gem dependencies? [duplicate]
...
207
It means "equal to or greater than in the last digit", so e.g. ~> 2.3 means
"equal to 2.3 or...
半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术
...har *strSrc, int nMaxLen)
{
if (strSrc == NULL || nMaxLen == 0)
{
return NULL;
}
int len = strlen(strSrc);
if (len == 0)
{
return strSrc;
}
int size = len; bool bFlag = false;
if (len >= n...
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
...种方法方法一：网上常见的pDlg->SetWindowPos(&CWnd::wndTopMost,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);或pDlg->SetWindowPos(pDlg->GetStyle() & WS...方法一：网上常见的
pDlg->SetWindowPos(&CWnd::wndTopMost, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE); 或
pDlg->SetWindowPos(pDlg->GetStyle() & W...
git使用代理服务器，提升git速度 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...快捷设置sss代理：git config --global http proxy & 39;socks5: 127 0 0 1:1080& 39;git config --global https proxy & 39;socks5: 127 0 0 1:1080& 39;更详细的设置 快捷设置sss代理：
git config --global http.proxy 'socks5://127.0.0.1:1080'
git config --global https.proxy 'socks5:...