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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...drop=FALSE) %>% tally
#> Species n
#> 1 setosa 50
#> 2 versicolor 50
#> 3 virginica 50
#> 4 empty_level 0
# Add character column
iris$group2 = c(rep(c("A","B"), 50), rep(c("B","C"), each=25))
# Empty groups involving combinations of Species and gro...
How to add a default include path for GCC in Linux?
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53
Create an alias for gcc with your favorite includes.
alias mygcc='gcc -I /whatever/'
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What is a .pid file and what does it contain?
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215
The pid files contains the process id (a number) of a given program. For example, Apache HTTPD m...
How to send a correct authorization header for basic authentication
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How to change highlighted occurrences color in Eclipse's sidebar?
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175
The color in the bar is the same as the color the text is highlighted with in the editor. It is ...
Moq mock method with out specifying input parameter
... tronda
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answered Oct 19 '11 at 19:40
Jeff OgataJeff Ogata
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Objective-C: Extract filename from path string
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PeterPeter
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Getting the docstring from a function
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251
Interactively, you can display it with
help(my_func)
Or from code you can retrieve it with
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Suppress/ print without b' prefix for bytes in Python 3
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Smart Manoj
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answered May 25 '13 at 9:14
sdaausdaau
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Why does parseInt yield NaN with Array#map?
...,'2','3'].map(function(num) { return parseInt(num, 10); });
or with ES2015+ syntax:
['1','2','3'].map(num => parseInt(num, 10));
(In both cases, it's best to explicitly supply a radix to parseInt as shown, because otherwise it guesses the radix based on the input. In some older browsers, a l...