After thinking about this a bit more, I should be caching it, too.  And
probably remove the #=.

-cbc

On Thu, Sep 8, 2016 at 10:55 PM, Chris Cunningham <cunningham.cb at gmail.com>
wrote:

> yeess.  But what I want is too know if I use one or the other of the
> timeZones, will that zone (specifically, the offset) give me the same time,
> or a different time?
>
> If there is not a valid way to compare timezones, and we don't want to
> check if they are the same, then I would fall back to asking if the offsets
> are the same (which is what I was/am proposing that TimeZone>>= do -
> compare by offsets, not by name or abbreviation).
>
> In my case, I was picking up the timezone from a windows box, which has
> different names than what is the 'standard' in the image - and quite
> possibly different by version of Windows (haven't checked that yet).  The
> offset, though, is consistent, at least.
>
> -cbc
>
> On Thu, Sep 8, 2016 at 5:31 PM, Paul DeBruicker <pdebruic at gmail.com>
> wrote:
>
>> TimeZones at different points in time, have different offsets (e.g.
>> January 1
>> and July 1 in L.A. -8 and -7 hours respectively).
>>
>> And they also, at different points in time, have different offsets for the
>> same point in time (e.g.
>> https://en.wikipedia.org/wiki/Time_in_Indiana#2006).
>>
>>
>> And their offset change arbitrarily without much notice
>> (e.g.https://www.washingtonpost.com/news/worldviews/wp/2016/
>> 07/06/egypt-cancelled-daylight-savings-time-three-
>> days-before-it-was-due-to-start/)
>>
>>
>>
>> Maybe a better approach for your use is to have a Time Zone cache so there
>> is only one canonical time zone for each time zone name/abbreviation combo
>> you're dealing with in your images.
>>
>>
>>
>>
>>
>>
>> cbc wrote
>> > This change is requested after I couldn't get get TimeZone compares to
>> > work.  Try this before loading:
>> >   (TimeZone offset: (Duration hours: -7 minutes: 0) name: 'Pacific Time
>> > (US
>> > & Canada)' abbreviation: 'PDT')
>> >   =
>> >   (TimeZone offset: (Duration hours: -7 minutes: 0) name: 'Pacific Time
>> > (US
>> > & Canada)' abbreviation: 'PDT')
>> >
>> > Returns false - since the hash isn't the same (different instances),
>> > although what they represent is exactly the same.
>> >
>> > After this, returns true.
>> >
>> > -cbc
>> >
>> > On Thu, Sep 8, 2016 at 4:40 PM, &lt;
>>
>> > commits at .squeak
>>
>> > &gt; wrote:
>> >
>> >> A new version of Chronology-Core was added to project The Inbox:
>> >> http://source.squeak.org/inbox/Chronology-Core-cbc.8.mcz
>> >>
>> >> ==================== Summary ====================
>> >>
>> >> Name: Chronology-Core-cbc.8
>> >> Author: cbc
>> >> Time: 8 September 2016, 4:39:41.903555 pm
>> >> UUID: 7315e61d-3652-fe44-8472-8037bd3ecc83
>> >> Ancestors: Chronology-Core-bf.7
>> >>
>> >> Add a rational #= to TimeZone - based on offset.
>> >>
>> >> =============== Diff against Chronology-Core-bf.7 ===============
>> >>
>> >> Item was added:
>> >> + ----- Method: TimeZone>>= (in category 'comparing') -----
>> >> + = aTimeZone
>> >> +       ^offset = aTimeZone offset!
>> >>
>> >>
>> >>
>>
>>
>>
>>
>>
>> --
>> View this message in context: http://forum.world.st/The-Inbo
>> x-Chronology-Core-cbc-8-mcz-tp4914866p4914869.html
>> Sent from the Squeak - Dev mailing list archive at Nabble.com.
>>
>>
>
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