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Returning first x items from array
I want to return first 5 items from array. How can I do this?
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Python using enumerate inside list comprehension
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answered May 27 '12 at 21:05
Óscar LópezÓscar López
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What ports does RabbitMQ use?
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PORT 4369: Erlang makes use of a Port Mapper Daemon (epmd) for resolution of node names in a cl...
How can I remove a flag in C?
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edited Mar 4 '13 at 15:17
Tim Cooper
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Java recursive Fibonacci sequence
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In fibonacci sequence each item is the sum of the previous two. So, you wrote a recursive algori...
pandas read_csv and filter columns with usecols
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How can I profile Python code line-by-line?
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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 extract text from a string using sed?
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