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Collections.emptyList() returns a List?
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answered Nov 20 '08 at 20:34
InverseFalconInverseFalcon
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Applying function with multiple arguments to create a new pandas column
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>>> import numpy as np
>>> df = pd.DataFrame({"A": [10,20,30], "B": [20, 30, 10]})
>>> df['new_column'] = np.multiply(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary functi...
Rename Pandas DataFrame Index
...od':['Steak', 'Lamb', 'Mango'],
'height':[165, 70, 120],
'score':[4.6, 8.3, 9.0],
'state':['NY', 'TX', 'FL']},
index = ['Jane', 'Nick', 'Aaron'])
This DataFrame has one level for each of the row and colum...
Add column with constant value to pandas dataframe [duplicate]
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Phillip CloudPhillip Cloud
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Zip lists in Python
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When you zip() together three lists containing 20 elements each, the result has twenty elements. Each element is a three-tuple.
See for yourself:
In [1]: a = b = c = range(20)
In [2]: zip(a, b, c)
Out[2]:
[(0, 0, 0),
(1, 1, 1),
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(17, 17, 17),
(18, 18, 18),
(19...
What is Vim recording and how can it be disabled?
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answered Oct 6 '09 at 20:08
yogsotothyogsototh
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CSS Input with width: 100% goes outside parent's bound
...emonstration in your specific context:
#mainContainer {
line-height: 20px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
background-color: rgba(0, 50, 94, 0.2);
margin: 20px auto;
display: table;
-moz-border-radius: 15px;
border-style: solid;
border-color: rgb(40, ...
generate days from date range
...ct 7 union all select 8 union all select 9) as d
) a
where a.Date between '2010-01-20' and '2010-01-24'
Output:
Date
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2010-01-24
2010-01-23
2010-01-22
2010-01-21
2010-01-20
Notes on Performance
Testing it out here, the performance is surprisingly good: the above query takes 0.0009 s...
How do I check in JavaScript if a value exists at a certain array index?
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answered Apr 20 '10 at 3:51
thomasrutterthomasrutter
101k2424 gold badges133133 silver badges156156 bronze badges
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Browsers' default CSS for HTML elements
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edited Jul 20 '17 at 23:18
thirtydot
204k4141 gold badges369369 silver badges333333 bronze badges
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