Re: [RFC] new :post header argument for post-processing of code block results

[Eric Schulte <schulte.eric@gmail.com>]

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Eric S Fraga <e.fraga@ucl.ac.uk> writes:

> Eric Schulte <schulte.eric@gmail.com> writes:
>
>> Hi,
>>
>> I've been wanting to add the ability to post-process the results of a
>> code block for some time, and some recent threads (e.g., [1] and [2])
>> could both have benefited from post-processing of code block output.
>
> [...]
>
>> Does this new header argument seem useful?  Any suggestions for better
>> syntax which don't add too much conceptual or code complexity?
>
> Very useful indeed!  I don't have a chance to try this out properly now
> but I know of several previous org files where this would have been very
> useful.
>

Great, I'm happy I wasn't the only one.

>
> One question: can one have a sequence of forward chained blocks with
> length > 2?
>
> Thanks,
> eric

Yes, this is now just part of the :var machinery.


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#+Title: :post header example

#+name: mult
#+begin_src emacs-lisp :var in=0
  (* 2 in)
#+end_src

#+name: add
#+begin_src emacs-lisp :var in=0
  (+ 1 in)
#+end_src

Putting the previous two together we get.
#+begin_src emacs-lisp :post mult(add(*this*))
  4
#+end_src

#+RESULTS:
: 10

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-- 
Eric Schulte
http://cs.unm.edu/~eschulte