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Definition of a Balanced Tree
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edited Feb 5 '13 at 16:50
answered Feb 5 '13 at 16:30
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Objective-C - Remove last character from string
... or just the string name
– Omar
Jul 5 '09 at 8:44
Thanks Jim, it was too early in the morning for arithmetic I guess. ...
How do android screen coordinates work?
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edited Jun 17 '15 at 6:08
answered Jul 14 '12 at 11:34
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How do you check whether a number is divisible by another number (Python)?
...est whether each number from 1 to 1000 is a multiple of 3 or a multiple of 5. The way I thought I'd do this would be to divide the number by 3, and if the result is an integer then it would be a multiple of 3. Same with 5.
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How to match a String against string literals in Rust?
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Converting NumPy array into Python List structure?
...ow do I convert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
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Common MySQL fields and their appropriate data types
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Create list of single item repeated N times
...eit('itertools.repeat(0, 10)', 'import itertools', number = 1000000)
0.37095273281943264
>>> timeit.timeit('[0] * 10', 'import itertools', number = 1000000)
0.5577236771712819
But wait - it's not a fair test...
>>> itertools.repeat(0, 10)
repeat(0, 10) # Not a list!!!
The fun...
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...