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C/C++ NaN constant (literal)?
...x is NaN.
– Archie
May 22 '13 at 12:10
7
@Archie: I don't think that's guaranteed in either langu...
How to delete last character in a string in C#?
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10 Answers
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Active
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ObjectiveC Parse Integer from String
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answered Aug 25 '10 at 17:36
Christian StewartChristian Stewart
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Difference between await and ContinueWith
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102
In the second code, you're synchronously waiting for the continuation to complete. In the firs...
Global and local variables in R
...ope of variables. For instance, in the following code snippet:
if (x > 10) {
y <- 0
}
else {
y <- 1
}
y remains accessible after the if-else statement.
As you well say, you can also create nested environments. You can have a look at these two links for understanding how to use t...
Identify user in a Bash script called by sudo
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answered Jan 4 '11 at 20:10
evanevan
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FixedThreadPool vs CachedThreadPool: the lesser of two evils
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110
A CachedThreadPool is exactly what you should use for your situation as there are no negative c...
Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...you won't need to specify the dtype)
In [24]: s = 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 ...
Why does running the Flask dev server run itself twice?
...eters
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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
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This takes the last. Not the maximum though:
In [10]: df.drop_duplicates(subset='A', keep="last")
Out[10]:
A B
1 1 20
3 2 40
4 3 10
You can do also something like:
In [12]: df.groupby('A', group_keys=False).apply(lambda x: x.loc[x.B.idxmax()])
Out[12]:
A ...