Get/set seconds component of a date-time.
Date-time must be a POSIXct, POSIXlt, Date, Period, chron, yearmon, yearqtr, zoo, zooreg, timeDate, xts, its, ti, jul, timeSeries, and fts objects.
1 2 3
a date-time object
numeric value to be assigned
the seconds element of x as a decimal number
1 2 3 4 5