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Checking for empty arrays: count vs empty
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12 Answers
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Given an RGB value, how do I create a tint (or shade)?
Given an RGB value, like 168, 0, 255 , how do I create tints (make it lighter) and shades (make it darker) of the color?
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How can I debug git/git-shell related problems?
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217
For even more verbose output use following:
GIT_CURL_VERBOSE=1 GIT_TRACE=1 git pull origin mas...
How to install PostgreSQL's pg gem on Ubuntu?
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19 Answers
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Changing a specific column name in pandas DataFrame
...ns = {'two':'new_name'})
In [28]: df
Out[28]:
one three new_name
0 1 a 9
1 2 b 8
2 3 c 7
3 4 d 6
4 5 e 5
Following is the docstring for the rename method.
Definition: df.rename(self, index=None, columns=None, copy=Tr...
Windows API Code Pack: Where is it? [closed]
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edited Jul 7 '14 at 4:29
answered Jun 26 '14 at 1:10
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Scala list concatenation, ::: vs ++
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Legacy. List was originally defined to be functional-languages-looking:
1 :: 2 :: Nil // a list
list1 ::: list2 // concatenation of two lists
list match {
case head :: tail => "non-empty"
case Nil => "empty"
}
Of course, Scala evolved other collections, in an ad-hoc manner....