[squeak-dev] About the new Date

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Sat Feb 11 17:00:42 UTC 2012

2012/2/11 Chris Muller <asqueaker at gmail.com>:
>>> +1 again, I like DateAndTime>>midnight to use receiver offset, and
>>> consequently asDate too, it's the least surprising...
>>> Well, it won't perfectly handle those legal days when DST change and
>>> which are not 24h long, but it's already better than what we have.
>>> Now, if you don't have a local zero offset, you'll get
>>> (Date newDay: 10 month: 2 year: 2012) = Date today = false
> Mmm, neither expression on either side of the = sign specifies an
> offset, so you should get true, not false.  Indeed, I get true in my
> image:
> DateAndTime localOffset  "-0:06:00:00"
> (Date newDay: 11 month: 2 year: 2012) = Date today  "true"

Ah yes, you are right I missed the change of Timespan>>#current

So the feature is:

DateAndTime now asDate = Date today = DateAndTime localOffset isZero.

That's a thing to remember, previously all dates were created with
same localOffset (at least at time of creation).
I still think we need helper messages for conversions to different time zone
(my previous proposition is weak because it does not account for DST,
we should better refer to TimeZone rather than offset...).


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