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How do .gitignore exclusion rules actually work?
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Minimum and maximum date
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From the spec, §15.9.1.1:
A Date object contains a Number indicating a particular instant in time to within a millisecond. Such a Number is called a time value. A time value may also be NaN, indicating that the Date object does not represent...
Define all functions in one .R file, call them from another .R file. How, if possible?
...s will work:
> source("abc.R")
> source("xyz.R")
> fooXYZ(3)
[1] 5
>
Even if there are cyclical dependencies, this will work.
E.g. If abc.R is this:
fooABC <- function(x) {
k <- barXYZ(x)+1
return(k)
}
barABC <- function(x){
k <- x+30
return(k)
}
and...
How to select only the first rows for each unique value of a column
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Send POST Request with Data Specified in File via Curl
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BigDecimal equals() versus compareTo()
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edited May 28 at 12:56
answered Jul 22 '11 at 7:59
Jo...
How to change value of process.env.PORT in node.js?
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285
For just one run (from the unix shell prompt):
$ PORT=1234 node app.js
More permanently:
$ e...
Does Qt support virtual pure slots?
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edited Mar 25 '18 at 12:41
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Breaking up long strings on multiple lines in Ruby without stripping newlines
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