Re: [threeten-develop] wip/discordian

[Stephen I. <clo...@ou...>]

It does, thanks.  That’s pretty much what I was expecting, it just ends up being more work.


I may have a pull request for this calendar later this week.







Stephen A. Imhoff





From: Stephen Colebourne
Sent: ‎Wednesday‎, ‎November‎ ‎5‎, ‎2014 ‎03‎:‎32
To: thr...@li...





On 2 November 2014 23:58, Stephen Imhoff <clo...@ou...> wrote:
> Well, for plus/minus (and day-of-year) that’s what I did (because it’s
> closest to the behavior seen for February 29th).
> But things get a little strange with until(…), because of how St. Tib’s Day
> sits outside of the normal day-of-month/week count.  You don’t have the
> problem with the Gregorian/ISO leap day because it’s considered part of the
> normal count of days, and it’s added at the end of the month.  In the
> Discordian calendar, the 59th and 60th days of the first month explicitly
> stay those days of the month(and 4th and 5th day of the week, respectively),
> even when St. Tib’s Day gets inserted between them.  So my question was
> really more about how much of an effect to make it have.
> ie -> From 1/55 to St. Tib’s Day.  This is a 5-day difference (no problem
> with ChronoUnit.DAYS).  However, the next same day-of-week is actually 1/60,
> the day after St. Tib’s Day.  Adding 1 week to 1/55 yields 1/60 always.
> Subtracting 1 week from 1/60 and St. Tib’s Day yields 1/55 in both cases
> (because of coercing St. Tib’s Day to 1/60 first),  but when dealing with
> until(…) we haven’t gotten to the same-of-unit yet.  So do I silently coerce
> it for until(…) too (easy), or go for a stricter, more “correct”
> interpretation?

1/55 plus 5 days = StTibs
1/54 plus 1 week = 1/59
1/55 plus 1 week = 1/60
(plus week/month/year never lands on StTibs)

from 1/55 until StTibs in days = 5
from 1/55 until 1/60 in days = 6
from 1/55 until StTibs in weeks = 0
from 1/55 until 1/60 in weeks = 1

But I'm not sure if that answers your question!


>> WeekFields is entirely based on 7 day weeks, so I suspect its not
>> worth trying to be clever there,
>
> Well, I could tell it’s based on 7-day weeks, my question was more about how
> it was supposed to interact with calendars without 7-day weeks.
> My initial assumption was that it should return the actual ISO day-of-week
> (based on Epoch Day or something), but it seems to be returning the local
> day-of-week (ie, 1-5 for the Discordian Calendar) instead.  Is it just not
> supported for calendars without 7-day weeks (and if so, should it throw an
> error), or was my initial thought correct, and it should return the actual
> ISO day-of-week?

I think its just not supported.

Stephen

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