大约有 47,000 项符合查询结果（耗时：0.0343秒） [XML]
How can I obtain the element-wise logical NOT of a pandas Series?
...ean Series, use ~s:
In [7]: s = pd.Series([True, True, False, True])
In [8]: ~s
Out[8]:
0 False
1 False
2 True
3 False
dtype: bool
Using Python2.7, NumPy 1.8.0, Pandas 0.13.1:
In [119]: s = pd.Series([True, True, False, True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, bes...
Postgresql aggregate array
...
edited Jun 13 '12 at 23:18
answered Jun 7 '12 at 8:56
Mich...
How can I configure NetBeans to insert tabs instead of a bunch of spaces?
...w the Formatting category.
These menu items remain valid as of NetBeans 8.0.
share
|
improve this answer
|
follow
|
...
Efficient way to rotate a list in python
...
287
A collections.deque is optimized for pulling and pushing on both ends. They even have a dedicat...
Selecting the first “n” items with jQuery
... thefoxrocks
1,34622 gold badges1414 silver badges3838 bronze badges
answered Dec 8 '09 at 8:42
istrubleistruble
11.6k22 gold bad...
Selecting data frame rows based on partial string match in a column
... 240D 24.4 4 146.7 62 3.69 3.19 20.0 1 0 4 2
# Merc 230 22.8 4 140.8 95 3.92 3.15 22.9 1 0 4 2
# Merc 280 19.2 6 167.6 123 3.92 3.44 18.3 1 0 4 4
# Merc 280C 17.8 6 167.6 123 3.92 3.44 18.9 1 0 4 4
# Merc 450SE 16.4 8 275.8 180 3.07 4.07 17.4 0...
Does a valid XML file require an XML declaration?
... of Xerces.
Is the XML declaration <?xml version="1.0" encoding="UTF-8"?> required?
3 Answers
...
Named regular expression group “(?Pregexp)”: what does “P” stand for?
...
|
edited Apr 8 '12 at 16:00
answered Apr 8 '12 at 3:05
...
How to check status of PostgreSQL server Mac OS X
...look for a command that looks something like this (your version may not be 8.3):
/Library/PostgreSQL/8.3/bin/postgres -D /Library/PostgreSQL/8.3/data
To start the server, execute something like this:
/Library/PostgreSQL/8.3/bin/pg_ctl start -D /Library/PostgreSQL/8.3/data -l postgres.log
...
Sass and combined child selector
...
edited Apr 30 '15 at 22:58
Continuity8
1,41322 gold badges1414 silver badges2828 bronze badges
answered...