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Fastest way to find second (third…) highest/lowest value in vector or column
...;- length(x)
if(N>len){
warning('N greater than length(x). Setting N=length(x)')
N <- length(x)
}
sort(x,partial=len-N+1)[len-N+1]
}
microbenchmark::microbenchmark(
Rfast = Rfast::nth(x,5,descending = T),
maxn = maxN(x,5),
order = x[order(x, decreasing...
Is there a printf converter to print in binary format?
I can print with printf as a hex or octal number. Is there a format tag to print as binary, or arbitrary base?
52 Answer...
Force “git push” to overwrite remote files
...remote> and <branch> will force push all local branches that have set --set-upstream.
Just be warned, if other people are sharing this repository their revision history will conflict with the new one. And if they have any local commits after the point of change they will become invalid.
U...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
What is the most efficient algorithm to achieve the following:
27 Answers
27
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Application auto build versioning
...
The Go linker (go tool link) has an option to set the value of an uninitialised string variable:
-X importpath.name=value
Set the value of the string variable in importpath named name to
value.
Note that before Go 1.5 this option took two separate argument...
How do I output an ISO 8601 formatted string in JavaScript?
I have a Date object. How do I render the title portion of the following snippet?
14 Answers
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How to run the sftp command with a password from Bash script?
...istory.
A more secure alternative which is available since LFTP 4.5.0 is setting the LFTP_PASSWORDenvironment variable and executing lftp with --env-password. Here's a full example:
LFTP_PASSWORD="just_an_example"
lftp --env-password sftp://user@host -e "put local-file.name; bye"
LFTP also inc...
Showing the stack trace from a running Python application
.... For example, bzr by default installs a SIGQUIT handler that invokes pdb.set_trace() to immediately drop you into a pdb prompt. (See the bzrlib.breakin module's source for the exact details.) With pdb you can not only get the current stack trace (with the (w)here command) but also inspect variab...
Javascript reduce on array of objects
...
TL;DR, set the initial value
Using destructuring
arr.reduce( ( sum, { x } ) => sum + x , 0)
Without destructuring
arr.reduce( ( sum , cur ) => sum + cur.x , 0)
With Typescript
arr.reduce( ( sum, { x } : { x: number } ) => s...
Find a pair of elements from an array whose sum equals a given number
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@jazzz I mean HashMap here, though HashSet will also do. Here is the implementation - github.com/kinshuk4/AlgorithmUtil/blob/master/src/com/vaani/…. Hope it helps.
– kinshuk4
Oct 6 '18 at 16:27
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