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Sort hash by key, return hash in Ruby
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How can I access and process nested objects, arrays or JSON?
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Preliminaries
JavaScript has only one data type which can contain multiple values: Object. A...
How to get the primary IP address of the local machine on Linux and OS X? [closed]
...ould return me the primary (first) IP address of the localhost, other than 127.0.0.1
31 Answers
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Can I change the checkbox size using CSS?
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Pandas dataframe get first row of each group
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>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 seco...
How to convert a scala.List to a java.util.List?
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import scala.collection.jcl.ArrayList
unconvertList(new ArrayList ++ List(1,2,3))
From Scala 2.8 onwards:
import scala.collection.JavaConversions._
import scala.collection.mutable.ListBuffer
asList(ListBuffer(List(1,2,3): _*))
val x: java.util.List[Int] = ListBuffer(List(1,2,3): _*)
However, a...
How do I force make/GCC to show me the commands?
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edited Jan 8 '17 at 4:43
Steven Penny
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is it possible to evenly distribute buttons across the width of an android linearlayout
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19 Answers
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Open Redis port for remote connections
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Did you set the bind option to allow remote access on the redis server?
Before (file /etc/redi...
What's the function like sum() but for multiplication? product()?
...ort operator
def prod(iterable):
return reduce(operator.mul, iterable, 1)
>>> prod(range(1, 5))
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Note, in Python 3, the reduce() function was moved to the functools module.
Specific case: Factorials
As a side note, the primary motivating use case for prod() is to compute factorials....