Gets the time when the file was last modified
Gets the time when the file was last modified. The time is returned as a
# S3 method for default lastModified(pathname, ...)
characterstring of the pathname to be checked.
POSIXct object specifying when the file was last modified.
If the file does not exist or it is a directory,
0 is returned.
This function follows symbolic links (also on Windows) and returns a value based on the link target (rather than the link itself).
file.info() is used.