大约有 47,000 项符合查询结果（耗时：0.0547秒） [XML]
str performance in python
While profiling a piece of python code ( python 2.6 up to 3.2 ), I discovered that the
str method to convert an object (in my case an integer) to a string is almost an order of magnitude slower than using string formatting.
...
src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
...
|
edited Aug 6 '13 at 6:10
answered Apr 2 '13 at 9:48
...
Removing duplicates from a list of lists
...
>>> k = [[1, 2], [4], [5, 6, 2], [1, 2], [3], [4]]
>>> import itertools
>>> k.sort()
>>> list(k for k,_ in itertools.groupby(k))
[[1, 2], [3], [4], [5, 6, 2]]
itertools often offers the fastest and most powerful solutions to this kind of ...
PendingIntent does not send Intent extras
...
3 Answers
3
Active
...
How can I plot with 2 different y-axes?
...t y axes on the same plot
(some material originally by Daniel Rajdl 2006/03/31 15:26)
Please note that there are very few situations where it is appropriate to use two different scales on the same plot. It is very easy to mislead the viewer of the graphic. Check the following two examples and comm...
Difference between json.js and json2.js
...
3 Answers
3
Active
...
xkcd style graphs in MATLAB
...t a transformation.
%# define plot data
x = 1:0.1:10;
y1 = sin(x).*exp(-x/3) + 3;
y2 = 3*exp(-(x-7).^2/2) + 1;
%# plot
fh = figure('color','w');
hold on
plot(x,y1,'b','lineWidth',3);
plot(x,y2,'w','lineWidth',7);
plot(x,y2,'r','lineWidth',3);
xlim([0.95 10])
ylim([0 5])
set(gca,'fontName','Comic ...
C++ template typedef
...e <size_t N>
using Vector = Matrix<N, 1>;
The type Vector<3> is equivalent to Matrix<3, 1>.
In C++03, the closest approximation was:
template <size_t N>
struct Vector
{
typedef Matrix<N, 1> type;
};
Here, the type Vector<3>::type is equivalent to...
Add to Array jQuery
...
301
For JavaScript arrays, you use push().
var a = [];
a.push(12);
a.push(32);
For jQuery objec...
How to write one new line in Bitbucket markdown?
...
It's possible, as addressed in Issue #7396:
When you do want to insert a <br /> break tag using Markdown, you end a line with two or more spaces, then type return or Enter.
shar...