deltaMonths method

int deltaMonths(
  1. CalendarMonth other
)

The difference in months between the other month and this month. If other is later than this month, this will be a positive number. For all N, month.deltaMonths(month.addMonths(N)) == N.

Implementation

int deltaMonths(CalendarMonth other) =>
    (other.year - year) * 12 + other.month - month;