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How to update a value, given a key in a hashmap?
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17 Answers
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How do I echo and send console output to a file in a bat script?
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12 Answers
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PreparedStatement IN clause alternatives?
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195
An analysis of the various options available, and the pros and cons of each is available here....
How can I pass a list as a command-line argument with argparse?
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How are multi-dimensional arrays formatted in memory?
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147
A static two-dimensional array looks like an array of arrays - it's just laid out contiguously...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...e .drop argument that does just what you asked for:
df = data.frame(a=rep(1:3,4), b=rep(1:2,6))
df$b = factor(df$b, levels=1:3)
df %>%
group_by(b, .drop=FALSE) %>%
summarise(count_a=length(a))
#> # A tibble: 3 x 2
#> b count_a
#> <fct> <int>
#> 1 1 ...
How to control the line spacing in UILabel
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edited Jan 5 '18 at 8:31
Bart van Kuik
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answered Ap...
How to read a file without newlines?
...ead().splitlines()
Or you can strip the newline by hand:
temp = [line[:-1] for line in file]
Note: this last solution only works if the file ends with a newline, otherwise the last line will lose a character.
This assumption is true in most cases (especially for files created by text editors, ...
How to track down a “double free or corruption” error
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answered May 25 '10 at 8:42
HasturkunHasturkun
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Drop all the tables, stored procedures, triggers, constraints and all the dependencies in one sql st
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