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Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
Statistics: combinations in Python
...
123
See scipy.special.comb (scipy.misc.comb in older versions of scipy). When exact is False, it u...
Convert javascript array to string
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123
Converting From Array to String is So Easy !
var A = ['Sunday','Monday','Tuesday','Wednesday'...
Canvas is stretched when using CSS but normal with “width” / “height” properties
...t answer, but don't forget to add the canvasObject.setAttribute('height', '123') too!
– Tom Wells
Mar 15 '13 at 14:46
...
File system that uses tags rather than folders?
...c genre=indie-rock good year=1999
$ tmsu tag melody.mp3 music
$ tmsu tag DC123.jpg photo landscape country=italy year=2014
$ tmsu files music year = 1999
./song.mp3
And the virtual filesystem:
$ mkdir mp
$ tmsu mount mp
$ ls mp
query tags
$ ls tags
country genre good landscape photo music ...
How can I find the latitude and longitude from address?
...tch
} // end if
} // end convertAddress
Where address is the String (123 Testing Rd City State zip) you want to convert to LatLng.
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Iterate over a Javascript associative array in sorted order
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123
You cannot iterate over them directly, but you can find all the keys and then just sort them.
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MYSQL Truncated incorrect DOUBLE value
...tion "mysql-truncated-incorrect-double-value"
– heman123
May 10 '18 at 11:47
Yes..i too had a similar experience while...
How do you check that a number is NaN in JavaScript?
...e idea of NaN gets confusing when var value = 0/0; and var value2= String("123 131"); create NaN values and something like this var value3 = "abcd"; is also a NaN value.
– Nick Pineda
Mar 11 '16 at 5:50
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How do I erase an element from std::vector by index?
...you use std::next you can do it in one line: vec.erase( next(begin(vec), 123) );
– dani
Oct 5 '16 at 20:36
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