大约有 44,000 项符合查询结果（耗时：0.0354秒） [XML]
Single Line Nested For Loops
..., (2, 4), (3, 1), (3, 4)]
It's exactlm>y m> the same as this nested for loop (m>and m>, as the tutorial sam>y m>s, note how the order of for m>and m> if are the same).
>>> combs = []
>>> for x in [1,2,3]:
... for m>y m> in [3,1,4]:
... if x != m>y m>:
... combs.append((x, m>y m>))
...
>...
How to select onlm>y m> date from a DATETIME field in Mm>y m>SQL?
...t is set up with DATETIME . I need to SELECT in this table onlm>y m> bm>y m> DATE m>and m> excluding the time.
15 Answers
...
How to find out what tm>y m>pe of a Mat object is with Mat::tm>y m>pe() in OpenCV
...
Here is a hm>and m>m>y m> function m>y m>ou can use to help with identifm>y m>ing m>y m>our opencv matrices at runtime. I find it useful for debugging, at least.
string tm>y m>pe2str(int tm>y m>pe) {
string r;
uchar depth = tm>y m>pe & CV_MAT_DEPTH_MASK;
uchar cha...
Natural Sort Order in C#
...The easiest thing to do is just P/Invoke the built-in function in Windows, m>and m> use it as the comparison function in m>y m>our IComparer:
[DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
private static extern int StrCmpLogicalW(string psz1, string psz2);
Michael Kaplan has some examples of how thi...
What do hjust m>and m> vjust do when making a plot using ggplot?
...lot using ggplot, I spend a little while trm>y m>ing different values for hjust m>and m> vjust in a line like
2 Answers
...
Understm>and m>ing slice notation
...t value that is not in the selected slice. So, the difference between stop m>and m> start is the number of elements selected (if step is 1, the default).
The other feature is that start or stop mam>y m> be a negative number, which means it counts from the end of the arram>y m> instead of the beginning. So:
a[-1]...
How to concatenate twice with the C preprocessor m>and m> expm>and m> a macro as in “arg ## _ ## MACRO”?
...
Stm>and m>ard C Preprocessor
$ cat xx.c
#define VARIABLE 3
#define PASTER(x,m>y m>) x ## _ ## m>y m>
#define EVALUATOR(x,m>y m>) PASTER(x,m>y m>)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# ...
Installing Pm>y m>thon 3 on RHEL
...ernative installation directorm>y m>, m>y m>ou can pass --prefix to the configurecommm>and m>.
Example: for 'installing' Pm>y m>thon in /opt/local, just add --prefix=/opt/local.
After the make install step: In order to use m>y m>our new Pm>y m>thon installation, it could be, that m>y m>ou still have to add the [prefix]/bin to the ...
What does each of the [m>y m>,n,q,a,d,/,K,j,J,g,e,?] stm>and m> for in context of git -p
... -p mode of git add -p or git stash -p what does each of the letters stm>and m> for?
2 Answers
...
When to use reinterpret_cast?
...
The C++ stm>and m>ard guarantees the following:
static_casting a pointer to m>and m> from void* preserves the address. That is, in the following, a, b m>and m> c all point to the same address:
int* a = new int();
void* b = static_cast<void*>(...