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as.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.