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Initializing a static std::map in C++
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edited Jul 4 '13 at 13:08
answered Sep 26 '08 at 10:17
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Extracting the last n characters from a ruby string
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edited Nov 2 '13 at 6:40
nostopbutton
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answered Mar 7 '...
All combinations of a list of lists
...he asterisk in *a?
– Serrano
Feb 4 '13 at 20:20
55
*a means these are arguments being passed to t...
Call apply-like function on each row of dataframe with multiple arguments from each row
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You can apply apply to a subset of the original data.
dat <- data.frame(x=c(1,2), y=c(3,4...
Get specific line from text file using just shell script
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answered Oct 11 '13 at 21:40
KentKent
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Why isn't std::initializer_list a language built-in?
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edited Mar 4 '13 at 15:13
answered Mar 4 '13 at 10:30
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npm windows install globally results in npm ERR! extraneous
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Kyle Robinson YoungKyle Robinson Young
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Efficiency of purely functional programming
...t overall state.
– supercat
Jun 16 '13 at 4:28
Even the pointer model (O(log n) memory access, loosely speaking) isn't...
Get element inside element by class and ID - JavaScript
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Joseph MarikleJoseph Marikle
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How to convert index of a pandas dataframe into a column?
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tick tag obs
2016-02-26 C 2 0.0139
2016-02-27 A 2 0.5577
2016-02-28 C 6 0.0303
and you want to convert the 1st (tick) and 3rd (obs) levels in the index into columns, you would do:
>>> df.reset_index(level=['tick', 'obs'])
ti...