Re: [xsl] XSLT 2.0 courses?

["Wendell Piez wapiez@xxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

Aside from the name question (I'd maybe like first-available()?) the
question arises, what would be the difference between
first-defined(($a,$b,$c)) and head(($a,$b,$c)) or ($a,$b,$c) => head() as
the case may be?

Cheers, Wendell


On Mon, Sep 21, 2020 at 9:41 AM Graydon graydon@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> On Mon, Sep 21, 2020 at 01:25:56PM -0000, Chris Papademetrious
> christopher.papademetrious@xxxxxxxxxxxx scripsit:
> > Good point. Perhaps this could be handled by chaining them?
> >
> > $a otherwise $b otherwise $c otherwise $default
>
> I think "otherwise" is fine for the pair case!
>
> It's clearer and easier to read than ($a,$b)[1] and it'll be easier to
> search for in documentation.
>
> Chaining otherwise as you propose doesn't strike me as clearer or easier
> to read; the location of the implicit parentheses is extremely important
> in that example and as soon as the values are the least bit complex all
> the parens will likely need to be made explicit.
>
> On the other hand, we've already got a concept of sequence, and commas,
> so ($a,$b,$c,$default) => first-defined()
>
> strikes me as clearer and easier to read than chaining "otherwise".
> Could even add a two-parameter version so the second parameter defines
> how to handle values which are false(). :)
>
> --
> Graydon Saunders  | graydonish@xxxxxxxxx
> CC&s oferC)ode, C0isses swC! mC&g.
> -- Deor  ("That passed, so may this.")
>
>


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