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Why does multiprocessing use only a single core after I import numpy?
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3 Answers
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Prepend a level to a pandas MultiIndex
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138
A nice way to do this in one line using pandas.concat():
import pandas as pd
pd.concat([df], k...
Check if an element is present in an array [duplicate]
...ecifically solves the problem, and so is now the preferred method.
[1, 2, 3].includes(2); // true
[1, 2, 3].includes(4); // false
[1, 2, 3].includes(1, 2); // false (second parameter is the index position in this array at which to begin searching)
As of JULY 2018, this has been implement...
Is there any way to use a numeric type as an object key?
...a string via the toString method.
> var foo = {}
undefined
> foo[23213] = 'swag'
'swag'
> foo
{ '23213': 'swag' }
> typeof(Object.keys(foo)[0])
'string'
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How to get first element in a list of tuples?
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253
>>> a = [(1, u'abc'), (2, u'def')]
>>> [i[0] for i in a]
[1, 2]
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How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
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Context switches much slower in new linux kernels
...has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe.
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Case preserving substitute in Vim
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Mark LodatoMark Lodato
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What is the difference between float and double?
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13 Answers
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Average of 3 long integers
I have 3 very large signed integers.
12 Answers
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