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File I/O in Every Programming Language [closed]
... write ?
– Riduidel
Aug 24 '10 at 9:03
And you can't split that over multiple lines? Best language ever
...
Why would I want stage before committing in Git?
...usefulness
– Pavan
Dec 13 '19 at 14:03
add a comment
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What are the real-world strengths and weaknesses of the many frameworks based on backbone.js? [close
...rdinating-views-in-backbone-js/
http://lostechies.com/derickbailey/2012/04/03/revisiting-the-backbone-event-aggregator-lessons-learned/
http://lostechies.com/derickbailey/2009/12/23/understanding-the-application-controller-through-object-messaging-patterns/ (WinForms code, but still applicable)
Mo...
When to use volatile with multi threading?
...evel programming rather than normal applications-level programming.
The 2003 C++ Standard does not say that volatile applies any kind of Acquire or Release semantics on variables. In fact, the Standard is completely silent on all matters of multithreading. However, specific platforms do apply Acq...
How to change the order of DataFrame columns?
...ged as needed.
This is what you have now:
In [6]: df
Out[6]:
0 1 2 3 4 mean
0 0.445598 0.173835 0.343415 0.682252 0.582616 0.445543
1 0.881592 0.696942 0.702232 0.696724 0.373551 0.670208
2 0.662527 0.955193 0.131016 0.609548 0.8046...
Convert light frequency to RGB?
...
answered Sep 24 '09 at 15:47
Stephen MesaStephen Mesa
4,31333 gold badges2121 silver badges1616 bronze badges
...
cartesian product in pandas
...f1, df2,on='key')[['col1', 'col2', 'col3']]
Output:
col1 col2 col3
0 1 3 5
1 1 3 6
2 2 4 5
3 2 4 6
See here for the documentation: http://pandas.pydata.org/pandas-docs/stable/merging.html#brief-primer-on-merge-methods-relational-algebra
...
Regular expression that matches valid IPv6 addresses
...
30 Answers
30
Active
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How to find list intersection?
...
answered Sep 13 '10 at 1:32
Mark ByersMark Byers
683k155155 gold badges14681468 silver badges13881388 bronze badges
...
How to profile a bash shell script slow startup?
... you'd like to begin a trace in any Bash script):
PS4='+ $(date "+%s.%N")\011 '
exec 3>&2 2>/tmp/bashstart.$$.log
set -x
add
set +x
exec 2>&3 3>&-
at the end of ~/.bashrc (or at the end of the section of any Bash script you'd like tracing to stop). The \011 is an octal ...
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