Indeed: you could create that talk page, if you felt that that was a good thing. Or, I could. Or anyone else who has registered on that site could.
Meanwhile, "draft" means "the task description might change if people find significant problems with the current description". That does not seem likely to happen in this case, but it's not like I have never been wrong... Thanks, -- Raul On Wed, May 23, 2018 at 6:11 PM, Jose Mario Quintana <[email protected]> wrote: >> Speaking of which, we don't yet have a J entry for >> http://rosettacode.org/wiki/French_Republican_calendar > > There is a box on that page stating: > > French Republican calendar is a draft programming task. It is not yet > considered ready to be promoted as a complete task, for reasons that should > be found in its talk page. > > Hovering on "talk page" the following text pops up: > > Talk:French Republican calendar (page does not exist) > > :D > > > On Wed, May 23, 2018 at 1:21 PM, Raul Miller <[email protected]> wrote: > >> Well... sure, if you start converting between different calendar >> systems, you'll have to have a model for each of them (and if you're >> dealing with more than two of them you'll probably want to designate >> one of them as the "reference" system along with conversions between >> each of the others and that reference). >> >> Speaking of which, we don't yet have a J entry for >> http://rosettacode.org/wiki/French_Republican_calendar >> >> Thanks, >> >> -- >> Raul >> >> >> On Wed, May 23, 2018 at 12:24 PM, Jose Mario Quintana >> <[email protected]> wrote: >> > That is clever! However, if I am interpreting it correctly, the verb - - >> > ~:&* in the context of the hybrid numbering below does not seem to be as >> > general as - is in the context of the astronomical numbering: >> > >> > Historical ... 4 BC 3 BC 2 BC 1 BC AD 1 AD 2 AD 3 ... >> > Hybrid ... _4 _3 _2 _1 1 2 3 ... >> > Astronomical ... _3 _2 _1 0 1 2 3 ... >> > >> > The offsets of some years (left argument) relative to a given year, for >> > instance, 4 BC match: >> > >> > _3 _2 _1 0 1 2 3 - _3 >> > 0 1 2 3 4 5 6 >> > _4 _3 _2 _1 1 2 3 (- - ~:&*) _4 >> > 0 1 2 3 4 5 6 >> > >> > Yet, for AD 3 do not: >> > >> > _3 _2 _1 0 1 2 3 - 3 >> > _6 _5 _4 _3 _2 _1 0 >> > >> > _4 _3 _2 _1 1 2 3 (- - ~:&*) 3 >> > _8 _7 _6 _5 _2 _1 0 >> > >> > I am afraid another complication is required. >> > >> > >> > On Sun, May 20, 2018 at 8:36 PM, Raul Miller <[email protected]> >> wrote: >> > >> >> Of course, you could use an expression such as (- - ~:&*) if you like... >> >> >> >> But, yeah, that convention does seem to be slightly... different from >> >> straight - >> >> >> >> Thanks, >> >> >> >> -- >> >> Raul >> >> >> >> >> >> On Sun, May 20, 2018 at 5:54 PM, Jose Mario Quintana >> >> <[email protected]> wrote: >> >> > Historians refer to specific years, using a well-known event as an >> >> anchor, >> >> > naturally as AD 1, AD 2, AD 3, ... and, going backward, as 1 BC, 2 >> BC, 3 >> >> > BC, ... >> >> > >> >> > Dropping the AD and inserting a - (_ in J) instead of BC allows for a >> >> > simple general consistent rule for calculating the years elapsed >> between >> >> > two dates by subtracting the lower date from the higher date; for >> >> example, >> >> > the years elapsed between (say, the beginning of) the year _4 and (the >> >> > beginning of) the year 30 can be calculated by 30 - _4 ... >> >> > >> >> > Nevermind, who cares if you are sometimes off by one year because the >> >> year >> >> > 0 is missing? Presumably, some people who like to date celestial >> events >> >> > precisely : >> >> > >> >> > Astronomical year numbering >> >> > https://en.wikipedia.org/wiki/Astronomical_year_numbering >> >> > >> >> > PS. There has been some debate about the exact year when the actual >> >> > aforementioned event happened: 4 BC, 1 BC, AD 1, ... >> >> > >> >> > >> >> > On Sat, May 19, 2018 at 9:38 AM, 'Bo Jacoby' via Chat < >> >> [email protected]> >> >> > wrote: >> >> > >> >> >> The terms "ordinal number" and "cardinal number" has advanced >> >> mathematical >> >> >> meanings in the theory of infinite sets and transfinite numbers, but >> the >> >> >> words also have ancient meanings in grammar. The semantics of a >> cardinal >> >> >> number is to count the elements of a finite set, and the semantics >> of an >> >> >> ordinal number is to identify a single element. This century is the >> >> >> twentyfirst century. That is a 1-origin ordinal number. The number of >> >> whole >> >> >> centuries that have passed so far is 20. That is a 0-origin cardinal >> >> >> number. /Bo. >> >> >> >> >> >> Den 12:49 lørdag den 19. maj 2018 skrev R.E. Boss < >> >> >> [email protected]>: >> >> >> >> >> >> >> >> >> > A solution to the problem is to distinguish between the ordinal >> >> numbers >> >> >> (first, >> >> >> > second, and so on) and cardinal numbers (zero, one, and so on). The >> >> first >> >> >> > ordinal number is "first", and the first cardinal number is "zero". >> >> >> Cardinal >> >> >> > number are for indexing, not for counting. Thanks. Bo. >> >> >> >> >> >> >> >> >> I like that very much, although I read different things in >> >> >> https://www.wikiwand.com/en/Ordinal_number >> >> >> "A natural number (which, in this context, includes the number 0) >> can be >> >> >> used for two purposes: to describe the size of a set, or to describe >> the >> >> >> position of an element in a sequence." >> >> >> (...) >> >> >> " Whereas the notion of cardinal number is associated with a set >> with no >> >> >> particular structure on it, the ordinals are intimately linked with >> the >> >> >> special kind of sets that are called well-ordered (...) " >> >> >> (...) >> >> >> " Ordinals may be used to label the elements of any given >> well-ordered >> >> set >> >> >> (the smallest element being labelled 0, the one after that 1, the >> next >> >> one >> >> >> 2, "and so on") and to measure the "length" of the whole set by the >> >> least >> >> >> ordinal that is not a label for an element of the set." >> >> >> See also https://www.wikiwand.com/en/Cardinal_number . >> >> >> >> >> >> >> >> >> R.E. Boss >> >> >> ------------------------------------------------------------ >> ---------- >> >> >> For information about J forums see http://www.jsoftware.com/ >> forums.htm >> >> >> >> >> >> >> >> >> ------------------------------------------------------------ >> ---------- >> >> >> For information about J forums see http://www.jsoftware.com/ >> forums.htm >> >> >> >> >> > ------------------------------------------------------------ >> ---------- >> >> > For information about J forums see http://www.jsoftware.com/ >> forums.htm >> >> ---------------------------------------------------------------------- >> >> For information about J forums see http://www.jsoftware.com/forums.htm >> >> >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
