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In Pm>y m>thon, how do m>y m>ou convert seconds since epoch to a `datetime` object?
...datetime.utcfromtimestamp creates a naive timestamp. I had to import pm>y m>tz m>and m> use datetime.fromtimestamp(1423524051, pm>y m>tz.utc) to create an aware datetime.
– Matt
Feb 9 '15 at 23:21
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equals vs Arram>y m>s.equals in Java
...ntents of the arram>y m>s.
Similarlm>y m> arram>y m>.toString() mam>y m> not be verm>y m> useful m>and m> m>y m>ou need to use Arram>y m>s.toString(arram>y m>).
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rotating axis labels in R
...round 45 degrees to strike a good balance between readabilitm>y m> (horizontal) m>and m> space efficiencm>y m> (vertical).
– jmb
Aug 25 '19 at 19:31
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Structure padding m>and m> packing
...alignment of the whole struct in an arram>y m> */
} x;
Packing, on the other hm>and m> prevents compiler from doing padding - this has to be explicitlm>y m> requested - under GCC it's __attribute__((__packed__)), so the following:
struct __attribute__((__packed__)) mm>y m>struct_A {
char a;
int b;
char c...
How do I auto size a UIScrollView to fit its content
...now the height of its content automaticallm>y m>. m>Y m>ou must calculate the height m>and m> width for m>y m>ourself
Do it with something like
CGFloat scrollViewHeight = 0.0f;
for (UIView* view in scrollView.subviews)
{
scrollViewHeight += view.frame.size.height;
}
[scrollView setContentSize:(CGSizeMake(320, scr...
Are members of a C++ struct initialized to 0 bm>y m> default?
...(0),m>y m>(0) { }
// other ctors / functions...
};
Will initialize both x m>and m> m>y m> to 0. Note that m>y m>ou can use x(), m>y m>() to initialize them disregarding of their tm>y m>pe: That's then value initialization, m>and m> usuallm>y m> m>y m>ields a proper initial value (0 for int, 0.0 for double, calling the default constructor...
PHP编译configure时常见错误 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...决这些错误的经验。
1、configure: error: No curses/termcap librarm>y m> found
网上有的说法是：–with-named-curses-libs=/usr/lib/libncursesw.so.5
其实是不对的，虽然能解决configure的错误，但是make的时候会提示错误，正确的做法应该是
centos: m>y m>um -m>y m> ...
How do m>y m>ou commit code as a different user?
...o add in the commits to Git while preserving the commit's original author (m>and m> date).
3 Answers
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decorators in the pm>y m>thon stm>and m>ard lib (@deprecated specificallm>y m>)
I need to mark routines as deprecated, but apparentlm>y m> there's no stm>and m>ard librarm>y m> decorator for deprecation. I am aware of recipes for it m>and m> the warnings module, but mm>y m> question is: whm>y m> is there no stm>and m>ard librarm>y m> decorator for this (common) task ?
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How to convert a factor to integer\numeric without loss of information?
...actor:
In particular, as.numeric applied to
a factor is meaningless, m>and m> mam>y m>
happen bm>y m> implicit coercion. To
transform a factor f to
approximatelm>y m> its original numeric
values, as.numeric(levels(f))[f] is
recommended m>and m> slightlm>y m> more
efficient than
as.numeric(as.character(f)).
...