On Sat, Jun 9, 2012 at 8:05 PM, Sven Van Caekenberghe <sven@beta9.be> wrote:
Not used as offset in DateAndTime, Durations can be anything, both negative as well as positive, like in
'2010-01-02' asDate - '2012-06-08' asDate
'2010-01-02' asDate - DateAndTime now
Ok, thanks Sven.
On 09 Jun 2012, at 19:53, Mariano Martinez Peck wrote:
On Sat, Jun 9, 2012 at 2:53 PM, Sven Van Caekenberghe <sven@beta9.be>
wrote:
On 09 Jun 2012, at 14:24, Mariano Martinez Peck wrote:
The seconds/nanoseconds are always positive when normalized.
Are you sure? I have just changed (for testing) to this:
DateAndTime localTimeZone: (TimeZone timeZones detect: [:tz | tz
abbreviation = 'EST']).
And now if I do:
DateAndTime now offset asSeconds ----> -18000
The seconds/nanoseconds in DateAndTime itself are like that, the TZ offset can be positive and negative:
http://en.wikipedia.org/wiki/Timezone
<<Most of the 40 time zones on land are offset from Coordinated Universal Time (UTC) by a whole number of hours (UTC-12 to UTC+14), but a few are offset by 30 or 45 minutes.>>
Ok, perfect. And what about durations outside DateAndTime. Say if I do: "-123 seconds" is that valid? I mean, should we accept normal durations (not the instVar offset of a DateAndTime) with negative seconds/nanoseconds?
thanks
-- Mariano http://marianopeck.wordpress.com
-- Mariano http://marianopeck.wordpress.com