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Add column with constant value to pandas dataframe [duplicate]
...with partially aligned indices:
In [7]: from pandas import DataFrame
In [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.ali...
Java: Best way to iterate through a Collection (here ArrayList)
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answered Mar 8 '11 at 5:31
MAKMAK
24.1k99 gold badges4949 silver badges8282 bronze badges
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Haskell error parse error on input `='
...a let to define things in it.
Prelude> let f x = x * 2
Prelude> f 4
8
Starting from GHC 8.0.1, top-level bindings are supported in GHCi, so OP's code will work without change.
GHCi, version 8.0.1.20161213: http://www.haskell.org/ghc/ :? for help
Prelude> f x = x * 2
Prelude> f 4
8
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Access object child properties using a dot notation string [duplicate]
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answered Nov 8 '11 at 14:39
Andy EAndy E
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throw new std::exception vs throw std::exception
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edited Nov 28 '19 at 22:35
Jarod42
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Version of Apache installed on a Debian machine
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418
Try apachectl -V:
$ apachectl -V
Server version: Apache/2.2.9 (Unix)
Server built: Sep 18 200...
Finding median of list in Python
...> median([1, 3, 5, 7])
4.0
Usage:
import statistics
items = [6, 1, 8, 2, 3]
statistics.median(items)
#>>> 3
It's pretty careful with types, too:
statistics.median(map(float, items))
#>>> 3.0
from decimal import Decimal
statistics.median(map(Decimal, items))
#>>&g...
The 'json' native gem requires installed build tools
I have ruby 1.9.2p180 (2011-02-18) [i386-mingw32] installed on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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What is the Invariant Culture?
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answered Mar 11 '10 at 8:05
Andrew BezzubAndrew Bezzub
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Access multiple elements of list knowing their index
..., which contains element with index 1, 2, 5, from given list [-2, 1, 5, 3, 8, 5, 6]. What I did is:
9 Answers
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