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Create list of single item repeated N times
...ith n identical elements:
>>> timeit.timeit('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.repe...
Drawable image on a canvas
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The good way to draw a Drawable on a canvas is not decoding it yourself but leaving it to the ...
C# DateTime to “YYYYMMDDHHMMSS” format
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17 Answers
17
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Regular expression for first and last name
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edited Feb 17 '14 at 9:57
John Smith
47855 silver badges1818 bronze badges
answered Mar 5...
Group by multiple columns in dplyr, using string vector input
...ike so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the columns we want to average within
columns = names(data)[-3]
library(dplyr)
df1 <- data...
Resize image in PHP
...some PHP code which automatically resizes any image uploaded via a form to 147x147px, but I have no idea how to go about it (I'm a relative PHP novice).
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How to activate JMX on my JVM for access with jconsole?
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11 Answers
11
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How to convert a string or integer to binary in Ruby?
...a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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awk without printing newline
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awk '{sum+=$3}; END {printf "%f",sum/NR}' ${file}_${f}_v1.xls >> to-plot-p.xls
print will insert a newline by default. You dont want that to happen, hence use printf instead.
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Skip rows during csv import pandas
... I don't want to import the 2nd row of the data file (the row with index = 1 for 0-indexing).
6 Answers
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