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Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...= Series([Timestamp('20130101'),np.nan,Timestamp('20130102 9:30')],dtype='M8[ns]')
In [25]: s
Out[25]:
0 2013-01-01 00:00:00
1 NaT
2 2013-01-02 09:30:00
dtype: datetime64[ns]``
In [26]: pd.isnull(s)
Out[26]:
0 False
1 True
2 False
dtype: bool
...
AJAX POST and Plus Sign ( + ) — How to Encode?
...orks for single byte encoded characters. It will not work for the full UTF-8 range.
eg:
text = "\u0100"; // Ā
// incorrect
escape(text); // %u0100
// correct
encodeURIComponent(text); // "%C4%80"
Note: "%C4%80" is equivalent to: escape('\xc4\x80')
Which is the byte sequence (\xc4\x80) that r...
ASP.NET MVC passing an ID in an ActionLink to the controller
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answered Nov 25 '08 at 11:01
AnthonyWJonesAnthonyWJones
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How to display hidden characters by default (ZERO WIDTH SPACE ie. ​)
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VicVic
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Take diff of two vertical opened windows in Vim
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answered Dec 8 '10 at 10:04
NefrubyrNefrubyr
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Is it good practice to use java.lang.String.intern()?
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answered Jul 7 '09 at 8:41
dfadfa
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How do you delete a column by name in data.table?
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8 Answers
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Add column with constant value to pandas dataframe [duplicate]
...with partially aligned indices:
In [7]: from pandas import DataFrame
In [8]: from numpy.random import randint
In [9]: df = DataFrame({'a': randint(3, size=10)})
In [10]:
In [10]: df
Out[10]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 0
7 0
8 0
9 0
In [11]: s = df.a[:5]
In [12]: dfa, sa = df.ali...
C++11 std::threads vs posix threads
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answered Oct 30 '12 at 8:47
Gunther PiezGunther Piez
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