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A general description is here.
length(<POSIXlt>) now returns the length of the corresponding abstract timedate-vector rather than always 9 (the length of the underlying list structure). (Wish of PR#14073 and PR#10507.)
Adding/subtracting a "difftime" object to/from a "POSIXt" or
"Date" object works again (it was broken by the addition of
Ops.difftime).
The R grammar prevents using the argument "name" in signatures
of methods for "$" and "$<-". The generic functions have been
changed to reflect this.
Adding/subtracting a "difftime" object to/from a "POSIXt" or "Date" object works again (it was broken by the addition of Ops.difftime).