Re: [ANN] BREAKING CHANGE -- removing #+BABEL file-wide property lines

[Rainer M Krug <r.m.krug@gmail.com>]

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On Fri, Oct 21, 2011 at 7:37 PM, Eric Schulte <schulte.eric@gmail.com>wrote:

> Christian Moe <mail@christianmoe.com> writes:
>
> > Hi again,
> >
> > I can quickly think of two advantages of the late lamented (if only by
> > me) #+BABEL header over using properties.
> >
> > 1. Allowing you to specify multiple buffer-wide options on the same
> > line (keeping things short), in the same colon :syntax as used in a
> > src block header (keeping things consistent and easy to copy back and
> > forth). None of this makes a substantive difference.
> >
>
> Understood, the new method will require multiple lines.  Everything is a
> trade-off...
>
> >
> > 2. Allowing you to pass multiple buffer-wide arguments with :var. This
> > could make a substantive difference in some applications. The
> > following will work:
> >
> >    #+BABEL: :var euro=1.3791 :var salestax=.15
> >
> > The following will not, since it tries to set the same property:
> >
> >    #+PROPERTY: var euro=1.3791
> >    #+PROPERTY: var salestax=.15
> >
> > If BABEL is dropped for PROPERTY, it would be good for the :var:
> > property to support multiple arguments (comma-separated would be good
> > for consistency with passing arguments through the SRCNAME). E.g.:
> >
> >    #+PROPERTY: var euro=1.3791, salestax=.15
> >
> > I think I'd like this better in any case.
> >
>
> Nice idea.  This same issue with "var" arose when we first started
> allowing header arguments to be specified inside subtree properties.
> I've just implemented your suggestion so the following are now possible.
>
> #+PROPERTY: var foo=1, bar=2
> #+PROPERTY: cache yes
>
> #+begin_src emacs-lisp
>  (+ foo bar)
> #+end_src
>
> #+results[be32e67491d4e92f75769aebe423c20ca01626fe]:
> : 3
>
>
Will

#+PROPERTY: var foo=1
#+PROPERTY: var bar=2

also work, or result in one variable not signed?

Rainer



> and
>
> #+begin_src emacs-lisp :var foo="this", bar="that"
>  (concat foo " " bar)
> #+end_src
>
> #+results[3cde077efa81f1ca24a62ac264dbd5776b6e0054]:
> : this that
>
> Thanks for the suggestion and I hope the above is a sufficient
> replacement for the now-missing #+BABEL: syntax.
>
> Cheers -- Eric
>
> --
> Eric Schulte
> http://cs.unm.edu/~eschulte/
>
>


-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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