- From: Dave Pawson <dave.pawson@gmail.com>
- Date: Mon, 7 Dec 2020 15:13:53 +0000
- To: Tomos Hillman <yamahito@gmail.com>
- Cc: public-xslt-40@w3.org, Christian Grün <cg@basex.org>
+1, easily readable. regards On Mon, 7 Dec 2020 at 14:42, Tomos Hillman <yamahito@gmail.com> wrote: > > I think the most natural syntax would be to interpret the 'direction' of the step by the order of arguments; for me that is implicit by use of the word 'to': I would (naturally) expect: > > 5 to 1 by 1 = (5, 4, 3, 2, 1) > 1 to 5 by 1 = (1, 2, 3, 4, 5) > 1 to -5 by 1 = (1, 0, -1, -2, -3, -4, -5) > 1 to 5 by -1 = error > > So that the 'by' argument is always positive. > > Tom > > _________________ > Tomos Hillman > eXpertML Ltd > +44 7793 242058 > On 7 Dec 2020, 14:19 +0000, Christian Grün <cg@basex.org>, wrote: > > I showed the proposed syntax (1 to 5 by -1) to a non-X(Path|SLT|Query) > developer, and the immediate response was: > > You must be wrong, it’s surely supposed to be: 5 to 1 by -1 > > I guess it’s too late to always start counting with the smaller value, > or to even allow "5 to 1" for reverse counts. Michael initially > proposed to place "by" ahead of "to" [1]… > > 5 by -1 to 1 > > …and I wonder if it’s not the better choice? > > [1] https://github.com/expath/xpath-ng/issues/22 > ____________________________________ > > On Tue, Dec 1, 2020 at 10:02 PM Dimitre Novatchev <dnovatchev@gmail.com> wrote: > > > Apart from anything else, it loses the idioms in the current language that rely on a range being a sequence of integers, > enabling familiar constructs such as x[position() = 1 to 10]. > > > Well, there is nothing wrong with series of time periods in a total time range. > > Maybe we can have a lifted overload of range, providing a function that, when applied on the provided as integers start, end and step, will produce the actual start, end and step for the actual range: > > range($startBase as xs:integer, > $endBase as xs:integer, > $stepBase as xs:integer, > $provider as function(xs:integer) as item() ) > as item()* > > So, the provider() or better name, will convert the integers to whatever typed-data we need. > > Thanks, > Dimitre > > -- Dave Pawson XSLT XSL-FO FAQ. Docbook FAQ.
Received on Monday, 7 December 2020 15:14:19 UTC