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Cassandra port usage - how are the ports used?
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131
@Schildmeijer is largely right, however port 7001 is still used when using TLS Encrypted Intern...
How to determine whether a Pandas Column contains a particular value
... working, except when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data frame only containing entries matching the missing id df[df['id'] == 43] there are, obviously, no entries in it. How to I determine if a column in a Pandas da...
How to delete a word and go into insert mode in Vim?
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edited Sep 7 '09 at 4:30
answered Sep 4 '09 at 13:20
Ka...
Determine when a ViewPager changes pages
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edited Dec 3 '17 at 19:33
chinmish
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answered Jul 2 '12...
Proper usage of Optional.ifPresent()
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edited Feb 15 '19 at 19:36
jwismar
11.6k33 gold badges2626 silver badges4242 bronze badges
answered Ju...
Java HashMap performance optimization / alternative
...ound 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every object:
public int hashCode() {
// assume that both a and ...
Swapping two variable value without using third variable
...s
Where as the version with the temporary variable takes:
real 0m0.543s
user 0m0.540s
sys 0m0.000s
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How to cancel a pull request on github?
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132
GitHub now supports closing a pull request
Basically, you need to do the following steps:
Visi...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...t strict).
Here it is in action:
In [11]: pd.to_datetime(pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can pass a specific format:
In [12]: pd.to_datetime(pd.Series(['05/23/2005']), format="%m/%d/%Y")
Out[12]:
0 2005-05-23
dtype: datetime64[ns]
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How does IPython's magic %paste work?
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138
You can't copy to IPython directly. This are the steps:
Copy the lines you want to copy into ...