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Best way to merge two maps and sum the values of same key?
...ap[Int,Int] = Map(1 -> 9, 2 -> 20)
scala> val map2 = Map(1 -> 100, 3 -> 300)
map2: scala.collection.immutable.Map[Int,Int] = Map(1 -> 100, 3 -> 300)
scala> map1 |+| map2
res2: scala.collection.immutable.Map[Int,Int] = Map(1 -> 109, 3 -> 300, 2 -> 20)
Specifically...
Applying function with multiple arguments to create a new pandas column
...on:
>>> 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 fun...
UML class diagram enum
...ML screenshot.
– Petri Tuononen
May 10 '12 at 7:32
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Locate the nginx.conf file my nginx is actually using
...l
$ nginx -V
nginx version: nginx/1.11.1
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1k 8 Jan 2015
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf ...
If you want, ...
google oauth2 redirect_uri with several parameters
...
answered Sep 24 '14 at 10:28
KiranKiran
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How to create a new database using SQLAlchemy?
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101
On postgres, three databases are normally present by default. If you are able to connect as a...
How do I get the localhost name in PowerShell?
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On Windows 10 Enterprise, env:COMPUTERNAME produced the following error: env:COMPUTERNAME : The term 'env:COMPUTERNAME' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the nam...
Setting Windows PowerShell environment variables
...le.ext".
– Lewistrick
Mar 11 '15 at 10:34
8
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Difference between Dictionary and Hashtable [duplicate]
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Gabe
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answered May 18 '09 at 7:56
Marc Gravell♦M...
Get index of array element faster than O(n)
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answered Jun 5 '11 at 10:41
sawasawa
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