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What does .SD stand for in data.table in R
...ttps://sashat.me/2017/01/11/list-of-20-simple-distinct-colors/
col16 = c('#e6194b', '#3cb44b', '#ffe119', '#0082c8', '#f58231', '#911eb4',
'#46f0f0', '#f032e6', '#d2f53c', '#fabebe', '#008080', '#e6beff',
'#aa6e28', '#fffac8', '#800000', '#aaffc3')
par(oma = c(2, 0, 0, 0))
sappl...
What is a regular expression for a MAC Address?
... @pilcrow could you please explain why this mac: C8:FD:19:55:E6:3A fails? It's an actual mac address. I modified your regex to accept : only /^(?:[[:xdigit:]]{2}([:]))(?:[[:xdigit:]]{2}\1){4}[[:xdigit:]]{2}$/ Thanks!
– Sam
May 27 '19 at 15:37
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Fastest way to find second (third…) highest/lowest value in vector or column
...746.7627 1433.221 1500.7865 13768.148 100
For 1 million numbers:
N = 1e6 #evaluates to 1 million
x = rnorm(N)
microbenchmark::microbenchmark(
Rfast = Rfast::nth(x,5,descending = T),
maxN = maxN(x,5),
order = x[order(x, decreasing = T)[5]]
)
Unit: milliseconds
expr min ...
How do I parse a string to a float or int?
...erything with spaces in between cannot be converted, like "- 12.3" and "45 e6"
– Simon
Aug 12 '19 at 13:43
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How to compare two floating point numbers in Bash?
... scientific format, provided a capital letter E is employed, e.g. num1=3.44E6
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Replace a value if null or undefined in JavaScript
...lter1 = "abc"
// filter2 = "Smith"
More Detailed Tutorial
Browser Support 92% July 2020
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Setting up a deployment / build / CI cycle for PHP projects
... community wiki
4 revs, 3 users 92%Steen
2
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How to add 30 minutes to a JavaScript Date object?
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var in30Mins = new Date(+new Date() + 1.8e6) is a one–liner, but not sure it's any better than a two–liner. ;-)
– RobG
Jun 18 '17 at 12:44
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Remove duplicates from an array of objects in JavaScript
...t you want to not be duplicated. Now can this be done through reducer for e6 standards?
– Christian Matthew
Sep 16 '19 at 19:09
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Test for equality among all elements of a single vector
...'s solution is ~10x for x, ~3x faster for y and slightly slower for runif(1e6).
– Joshua Ulrich
Jan 21 '11 at 18:34
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