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How do I negate a test with regular expressions in a bash script?
Using GNU bash (version 4.0.35(1)-release (x86_64-suse-linux-gnu), I would like to negate a test with Regular Expressions. For example, I would like to conditionally add a path to the PATH variable, if the path is not already there, as in:
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An “and” operator for an “if” statement in Bash
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Enabling error display in PHP via htaccess only
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answered May 25 '11 at 16:54
silexsilex
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what's the meaning of '=?' in angularJS directive isolate scope declaration?
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limido
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answered Dec 7 '13 at 23:20
Matt ZeunertMatt Zeunert
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HTML entity for the middle dot
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edited Mar 15 '16 at 3:44
Chris Martin
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LINQ Using Max() to select a single row
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@LandonPoch: That's not a good idea, as this would calculate the maximum N times with N being the number of items in table.
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jQuery duplicate DIV into another DIV
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answered Apr 17 '13 at 19:04
chrxchrx
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How to convert a ruby hash object to JSON?
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edited May 23 '17 at 12:34
Community♦
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answered Jul 6 '10 at 6:40
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How find all unused classes in Intellij Idea?
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Assign pandas dataframe column dtypes
...05-01
1 b 2 2018-05-02
df.dtypes
x object
y int64
z datetime64[ns]
dtype: object
and confirm the dtype is updated.
OLD/DEPRECATED ANSWER for pandas 0.12 - 0.16: You can use convert_objects to infer better dtypes:
In [21]: df
Out[21]:
x y
0 a 1
1 b 2
In [...