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Remove unwanted parts from strings in a column
...ith.
pd.__version__
# '0.24.1'
df
time result
1 09:00 +52A
2 10:00 +62B
3 11:00 +44a
4 12:00 +30b
5 13:00 -110a
df['result'] = df['result'].str.replace(r'\D', '')
df
time result
1 09:00 52
2 10:00 62
3 11:00 44
4 12:00 30
5 13:00 110
If you ...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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<IfModule prefork.c>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
MaxClients 150
MaxRequestsPerChild 0
</IfModule>
prefork的工作原理是，控制进程在最初建立“StartServers”个子进程后，为了满足MinSpareServers设置的需要创建一个进程，等待...
Restore the state of std::cout after manipulating it
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If your project is at least a bit sane, you have Boost and that comes with state savers for this purpose.
– Jan Hudec
Jun 13 '19 at 8:23
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Visual Studio warning: “Some of the properties associated with the solution could not be read”
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Could you expand upon that a bit more. Some users might not understand. Do you mean to rename it in explorer or Visual studio or in the actual file?
– iTechy
Sep 11 '15 at 18:38
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Renaming columns in pandas
...the .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [10,20]})
>>> df.columns = ['a', 'b']
>>> df
a b
0 1 10
1 2 20
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Haskell, Lisp, and verbosity [closed]
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Could you elaborate a bit more on "programming in Haskell is much less interactive". Doesn't GHCi really provide everything you need?
– Johannes Gerer
Apr 21 '13 at 9:11
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How do I start Mongo DB from Windows?
I have installed MongoDB on my Windows 7 (64 bit) machine. I have created the path data/db too but when I tried to start mongodb using the command 'C:\mongodb\bin\mongod.exe' , it is not starting. It is showing admin web console waiting for connections on port 28017 .
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A semantics for Bash scripts?
... POSIX shell's (hereafter referred to just as "the shell") semantics are a bit of a mutt, combining some features of LISP (s-expressions have a lot in common with shell word splitting) and C (much of the shell's arithmetic syntax semantics comes from C).
The other root of the shell's syntax comes f...
Can Flask have optional URL parameters?
...now of. Even Flask docs contain similar example (you need to scroll down a bit to see it).
– Audrius Kažukauskas
Jun 20 '13 at 20:54
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