大约有 45,000 项符合查询结果（耗时：0.0454秒） [XML]
How do I get the row count of a pandas DataFrame?
...setup=lambda n: pd.DataFrame(np.arange(n * 3).reshape(n, 3)),
n_range=[2**k for k in range(25)],
kernels=[
lambda data: data.shape[0],
lambda data: data[0].count(),
lambda data: len(data.index),
],
labels=["data.shape[0]", "data[0].count()", "len(data.index)"]...
Numpy argsort - what is it doing?
... to the documentation
Returns the indices that would sort an array.
2 is the index of 0.0.
3 is the index of 0.1.
1 is the index of 1.41.
0 is the index of 1.48.
share
|
improve this answer
...
Correct way of using JQuery-Mobile/Phonegap together?
...
|
edited Oct 22 '15 at 19:36
user241244
answered Oct 10 '12 at 13:59
...
How comment a JSP expression?
...
215
Pure JSP comments look like this:
<%-- Comment --%>
So if you want to retain the "="....
Python: access class property from string [duplicate]
...
280
x = getattr(self, source) will work just perfectly if source names ANY attribute of self, incl...
How do I pick 2 random items from a Python set? [duplicate]
...currently have a Python set of n size where n >= 0. Is there a quick 1 or 2 lines Python solution to do it? For example, the set will look like:
...
What's the difference between `=` and `
I'm using R 2.8.1 and it is possible to use both = and <- as variable assignment operators. What's the difference between them? Which one should I use?
...
What do numbers using 0x notation mean?
...
112
Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
6 ...
Complex numbers usage in python [closed]
...
2 Answers
2
Active
...
Installed Ruby 1.9.3 with RVM but command line doesn't show ruby -v
...find you need some hand-holding, take a look at Installing Ruby on Ubuntu 12.04, which gives a bit more explanation.
share
|
improve this answer
|
follow
|
...