大约有 23,000 项符合查询结果（耗时：0.0283秒） [XML]
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
... [2]: df
Out[2]:
col1 col2 col3 col4 col5 col6
0 A B 0.20 -0.61 -0.49 1.49
1 A B -1.53 -1.01 -0.39 1.82
2 A B -0.44 0.27 0.72 0.11
3 A B 0.28 -1.32 0.38 0.18
4 C D 0.12 0.59 0.81 0.66
5 C D -0.13 -1.65 -1.64 0.50
6 C D -1.42 -0.11 -0.18 ...
Which Python memory profiler is recommended? [closed]
... @profile
4 5.97 MB 0.00 MB def my_func():
5 13.61 MB 7.64 MB a = [1] * (10 ** 6)
6 166.20 MB 152.59 MB b = [2] * (2 * 10 ** 7)
7 13.61 MB -152.59 MB del b
8 13.61 MB 0.00 MB return a
...
SimpleTest vs PHPunit
I was wondering if anyone that has experience in both this stuff can shed some light on the significant difference between the two if any?
...
C# Double - ToString() formatting with two decimal places but no rounding
How do I format a Double to a String in C# so as to have only two decimal places?
15 Answers
...
Add st, nd, rd and th (ordinal) suffix to a number
...3rd
54 54th
55 55th
56 56th
57 57th
58 58th
59 59th
60 60th
61 61st
62 62nd
63 63rd
64 64th
65 65th
66 66th
67 67th
68 68th
69 69th
70 70th
71 71st
72 72nd
73 73rd
74 74th
75 75th
76 76th
77 77th
78 78th
79 79th
80 80th
81 81st
82 82nd
83 8...
What is the easiest way in C# to trim a newline off of a string?
...
Active
Oldest
Votes
...
How to use Checkbox inside Select Option
The client has given me a design which has a Select Option menu containing a checkbox together with the item name as individual items in the list.
Is there anyway possible to add a checkbox inside a Select Option menu?
...
How to validate an e-mail address in swift?
...ttern: "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$", options: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: count)) != nil
}
}
Usage
i...
Can I use git diff on untracked files?
Is it possible to ask git diff to include untracked files in its diff output, or is my best bet to use git add on the newly created files and the existing files I have edited, then use:
...
Given a filesystem path, is there a shorter way to extract the filename without its extension?
...
Active
Oldest
Votes
...