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What is the most efficient way to concatenate N arrays?
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335
If you're concatenating more than two arrays, concat() is the way to go for convenience and li...
Way to get number of digits in an int?
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30 Answers
30
Active
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How to shuffle a std::vector?
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203
From C++11 onwards, you should prefer:
#include <algorithm>
#include <random>
auto...
Show data on mouseover of circle
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Lars KotthoffLars Kotthoff
98.3k1313 gold badges176176 silver badges180180 bronze badges
...
Command line CSV viewer? [closed]
...e demonstrates how to use sed to insert a placeholder:
$ cat data.csv
1,2,3,4,5
1,,,,5
$ sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column -s, -t
1 2 3 4 5
1 5
$ cat data.csv
1,2,3,4,5
1,,,,5
$ column -s, -t < data.csv
1 2 3 4 5
1 5
$ sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column ...
What does |= (ior) do in Python?
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53
|= performs an in-place+ operation between pairs of objects. In particular, between:
sets: a u...
GLib compile error (ffi.h), but libffi is installed
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Scott Skiles
2,53322 gold badges2020 silver badges4242 bronze badges
answered Jul 8 '13 at 1:49
Eric Milliot-Martinez...
How to delete items from a dictionary while iterating over it?
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309
EDIT:
This answer will not work for Python3 and will give a RuntimeError.
RuntimeError: d...
Add column with constant value to pandas dataframe [duplicate]
...8]: from numpy.random import randint
In [9]: df = DataFrame({'a': randint(3, size=10)})
In [10]:
In [10]: df
Out[10]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 0
7 0
8 0
9 0
In [11]: s = df.a[:5]
In [12]: dfa, sa = df.align(s, axis=0)
In [13]: dfa
Out[13]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 ...
Android error: Failed to install *.apk on device *: timeout
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1131
Try changing the ADB connection timeout. I think it defaults that to 5000ms and I changed mine...