@@ -66,6 +66,10 @@ * Intervals have the guaranteed property of Interval#start <= Interval#end * Converting a gregorian Interval to a Duration will create a gregorian Duration, using both, months and picoseconds (the alternative choice would have been to use picoseconds only). +* The direction is preserved, so if datetime_a < datetime_b and you do + datetime_a - datetime_b + Then the resulting Interval's start will be datetime_a, its end will be datetime_b. All units will + be positive. But the moment you convert it to a Duration, the units will be negative. == The problem with +/- and datetimes/durations * Adding and subtracting durations to and from datetimes depends on the operands. NOTES.rdoc fa5d0d672f035747a1ae1c2b5a595328096209df Stefan Rusterholz apeiros@gmx.net http://github.com/apeiros/chronos/commit/919af77ae90d653012ea7a7cb79866c6ac429814 919af77ae90d653012ea7a7cb79866c6ac429814 2008-08-16T04:45:36-07:00 2008-08-16T04:45:36-07:00 added info wrt direction 227127e7c80e2624fcdbe91668ae84f74dcfb712 Stefan Rusterholz apeiros@gmx.net