Every calendar created with create.calendar is stored in the
calendar register.
The idea behind this register is allowing calendars to be accessed
by its names.
calendars()
remove_calendars(cals)
has_calendars(cals)character vector of calendars names
calendars returns the object which represents the calendars register.
Since the register inherits from environment, the calendars are
retrieved with the [[ operator.
But the register object has its own print generic which helps listing
all registered calendars.
remove_calendars remove calendars from the register.
# ACTUAL calendar
cal <- create.calendar("Actual")
cal <- calendars()[["Actual"]]
remove_calendars("Actual")
# lists registered calendars
calendars()
#> Calendars:
#> Brazil/ANBIMA, Brazil/B3, Brazil/BMF, actual, weekends
has_calendars(c("actual", "weekends"))
#> [1] TRUE TRUE