* Quirk in Emacs-Lisp code block evaluation
@ 2011-07-29 4:30 Matthew Snyder
2011-07-29 5:02 ` Eric Schulte
0 siblings, 1 reply; 2+ messages in thread
From: Matthew Snyder @ 2011-07-29 4:30 UTC (permalink / raw)
To: emacs-orgmode
Hello -
I noticed today as I was playing with code blocks that some results are prematurely truncated, possibly because they contain nil as a first element and are thus considered empty return values.
Consider:
#+BEGIN_SRC emacs-lisp
'(a nil nil b)
#+END_SRC
#+results:
| a | nil | nil | b |
But then:
#+BEGIN_SRC emacs-lisp
'(nil nil nil b)
#+END_SRC
#+results:
I'm using Emacs 24.0.50.1 and Org Mode 7.6, ELPA version 20110728.
--
Matthew Snyder
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Quirk in Emacs-Lisp code block evaluation
2011-07-29 4:30 Quirk in Emacs-Lisp code block evaluation Matthew Snyder
@ 2011-07-29 5:02 ` Eric Schulte
0 siblings, 0 replies; 2+ messages in thread
From: Eric Schulte @ 2011-07-29 5:02 UTC (permalink / raw)
To: Matthew Snyder; +Cc: emacs-orgmode
Matthew Snyder <matthew.c.snyder@gmail.com> writes:
> Hello -
>
> I noticed today as I was playing with code blocks that some results
> are prematurely truncated, possibly because they contain nil as a
> first element and are thus considered empty return values.
>
> Consider:
>
>
> #+BEGIN_SRC emacs-lisp
> '(a nil nil b)
> #+END_SRC
>
> #+results:
> | a | nil | nil | b |
>
> But then:
>
> #+BEGIN_SRC emacs-lisp
> '(nil nil nil b)
> #+END_SRC
>
> #+results:
>
> I'm using Emacs 24.0.50.1 and Org Mode 7.6, ELPA version 20110728.
>
Interesting corner case.
If you place a ":results scalar" header argument onto the code block,
then you get reasonable results
#+begin_src emacs-lisp :results scalar
'(nil nil nil nil)
#+end_src
#+results:
: (nil nil nil nil)
However when the results are converted into a table, the
`orgtbl-to-orgtbl' which ultimately calls the `orgtbl-to-generic'
function turns '(nil nil nil nil) into "". This may be something to
look at in the future, but for now I'm hesitant to touch such a central
function.
Cheers -- Eric
>
> --
> Matthew Snyder
--
Eric Schulte
http://cs.unm.edu/~eschulte/
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2011-07-29 16:44 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-07-29 4:30 Quirk in Emacs-Lisp code block evaluation Matthew Snyder
2011-07-29 5:02 ` Eric Schulte
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).