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Iterating over Java collections in Scala
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28
There is a wrapper class (scala.collection.jcl.MutableIterator.Wrapper). So if you define
imp...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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2 Answers
2
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Sorting arrays in NumPy by column
...ck example, to sort it and return a copy:
In [1]: import numpy as np
In [2]: a = np.array([[1,2,3],[4,5,6],[0,0,1]])
In [3]: np.sort(a.view('i8,i8,i8'), order=['f1'], axis=0).view(np.int)
Out[3]:
array([[0, 0, 1],
[1, 2, 3],
[4, 5, 6]])
To sort it in-place:
In [6]: a.view('i8,i8...
How to make lists contain only distinct element in Python? [duplicate]
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278
The simplest is to convert to a set then back to a list:
my_list = list(set(my_list))
One d...
Centering the pagination in bootstrap
...t;
<li><a href="?p=1" data-original-title="" title="">2</a></li>
</ul>
</div>
Bootstrap 4 has new class
<div class="text-xs-center">
<ul class="pagination">
<li><a href="?p=0" data-original-title="" title="">1&l...
Write a number with two decimal places SQL server
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218
try this
SELECT CONVERT(DECIMAL(10,2),YOURCOLUMN)
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How to pip install a package with min and max version range?
... install a package with both a minimum version ( pip install package>=0.2 ) and a maximum version which should never be installed (theoretical api: pip install package<0.3 ).
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
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29 Answers
29
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Efficient way to apply multiple filters to pandas DataFrame or Series
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250
Pandas (and numpy) allow for boolean indexing, which will be much more efficient:
In [11]: df...