Require c() to be applied before relatively expensive vectorized functions
Source:R/inner_combine_linter.R
inner_combine_linter.Rdas.Date(c(a, b)) is logically equivalent to c(as.Date(a), as.Date(b));
ditto for the equivalence of several other vectorized functions like
as.POSIXct() and math functions like sin(). The former is to be
preferred so that the most expensive part of the operation (as.Date())
is applied only once.
See also
linters for a complete list of linters available in lintr.