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How can I select random files from a directory in bash?
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answered Jan 5 '09 at 20:01
Josh LeeJosh Lee
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PhpStorm text size
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edited Sep 23 '12 at 15:01
answered Sep 22 '12 at 19:46
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git undo all uncommitted or unsaved changes
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edited Feb 13 at 19:25
answered Dec 28 '12 at 21:04
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Better naming in Tuple classes than “Item1”, “Item2”
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15 Answers
15
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mysql: see all open connections to a given database?
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answered Oct 25 '09 at 13:23
David RabinowitzDavid Rabinowitz
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Async/await vs BackgroundWorker
In the past few days I have tested the new features of .net 4.5 and c# 5.
4 Answers
4
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Concatenate a vector of strings/character
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Matt TurnerMatt Turner
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Sort a text file by line length including spaces
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bb The very longest line in the file
ccb
9 dd equal len. Orig pos = 1
500 dd equal len. Orig pos = 2
ccz
cca
ee A line with some spaces
1 dd equal len. Orig pos = 3
ff
5 dd equal len. Orig pos = 4
g
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Use a list of values to select rows from a pandas dataframe [duplicate]
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You can use isin method:
In [1]: df = pd.DataFrame({'A': [5,6,3,4], 'B': [1,2,3,5]})
In [2]: df
Out[2]:
A B
0 5 1
1 6 2
2 3 3
3 4 5
In [3]: df[df['A'].isin([3, 6])]
Out[3]:
A B
1 6 2
2 3 3
And to get the opposite use ~:
In [4]: df[~df['A'].isin([3, 6])]
Out[...
Rename a dictionary key
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765
For a regular dict, you can use:
mydict[new_key] = mydict.pop(old_key)
For an OrderedDict, I ...