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What is the most efficient way of finding all the factors of a number in Python?
...return set(reduce(list.__add__,
([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))
This will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So if the two factors are the same, they're both the square...
MDI CDockablePane使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ane进行布局，下面将应用心得以九个例子进行总结如下：1. CFrameWndEx 在框架类的头文件中定义一个CDo...最近做项目使用到了MFC的CDockablePane进行布局，下面将应用心得以九个例子进行总结如下：
1. CFrameWndEx 在框架类的头文件中...
Query for documents where array size is greater than 1
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How to use php serialize() and unserialize()
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while (1) vs. while(True) — Why is there a difference (in python 2 bytecode)?
Intrigued by this question about infinite loops in perl: while (1) Vs. for (;;) Is there a speed difference? , I decided to run a similar comparison in python. I expected that the compiler would generate the same byte code for while(True): pass and while(1): pass , but this is actually not the c...
Reference — What does this symbol mean in PHP?
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Incrementing / Decrementing Operators
++ increment operator
-- decrement operator
Example ...
离开1号店 于刚再创业钟情“互联网+” - 资讯 - 清泛网 - 专注C/C++及内核技术
离开1号店 于刚再创业钟情“互联网+”7月底，1号店两位联合创始人于刚、刘峻岭双双宣布离职，两人离职背后折射出1号店与沃尔玛(WMT.NYSE)之间存在较大分歧，合作貌合神离。告别一手创办的国内首家网上超市1号店后，于刚除...
What do ellipsis […] mean in a list?
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It means that you created an infinite list nested inside itself, which can not be printed. p ...
Converting datetime.date to UTC timestamp in Python
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