On Tuesday 02 Nov 2010 16:43:25 Nigel Kersten wrote:
> >> I believe that was by either passing an array or multiple arguments, no?
> >> E.g.:
> >>
> >> find-first-existing:
> >>
> >> file('foo', 'bar')
> >> template('foo.erb', 'bar.erb')
> >>
> >> concatenation:
> >>
> >> concat(file('foo'), file('bar'))
> >> concat(template('foo.erb'), template('bar.erb'))
> >>
> >> that way you can even mix them ;)
> >>
> >> concat(file('header'), template("foo.$host.erb", "foo.erb"))
> >
> > The proposal I was supporting (and the one in the bug tracker) retained
> > backward compatibility which means that passing more than one file to
> > template() still concatenates. That is deprecated though.
> >
> > *) Would creating a function that says, 'return the first argument that
> > doesn't throw an exception' be useful? *) Is it even feasible to write?
>
> maybe... I'm having trouble thinking of a decent name for this though :)
how about just first() or first_existing() ?
> > *) Also, I'm assuming that file() and template() throw an exception if
> > the file doesn't exist. Does anyone know if that's true?
>
> From memory they do, but I'll have to double check.
>
> > *) Also, what would you name this function?
> >
> > I'm thinking that if we do take this approach, it should be split off
> > into another ticket.
>
> I kind of disagree with splitting it off.
>
> Perhaps I didn't express myself well, but my main impetus was to make
> the source/file/template data specifications all support the
> find-first-existing and concatenation functionality in a sane and
> consistent manner.
Well, I suppose separating both concatenation and find-first-existing
functionalities from source/file()/template() does get you there (flexible and
consitent) at the cost of being little more verbose.
--
Michael Gliwinski
Henderson Group Information Services
9-11 Hightown Avenue, Newtownabby, BT36 4RT
Phone: 028 9034 3319
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