subtract method
Returns a new JDate instance with duration
subtracted from this.
JDate today = new JDate.now();
JDate fiftyDaysAgo = today.subtract(new Duration(days: 50));
Notice that the duration being subtracted is actually 50 * 24 * 60 * 60
seconds. If the resulting JDate
has a different daylight saving offset
than this
, then the result won't have the same time-of-day as this
, and
may not even hit the calendar date 50 days earlier.
Be careful when working with dates in local time.
Implementation
JDate subtract(Duration duration) => isJs
? JDate.fromMillisecondsSinceEpoch(
_millisecondsSinceEpoch - duration.inMilliseconds)
: JDate.fromMicrosecondsSinceEpoch(
_microsecondsSinceEpoch - duration.inMicroseconds);