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Re: [O] Library of Babel confusion


From: Lawrence Bottorff
Subject: Re: [O] Library of Babel confusion
Date: Fri, 6 Apr 2018 18:15:27 -0400

I guess I need more information. For example, what is C-c C-v v doing exactly? Then C-x C-e? And  M-x (symbol-function 'myelsquare) doesn't work. Again, 

#+name: myelsquare
#+header: :var x=0
#+begin_src emacs-lisp :var x=0
  (defun myelsquare (x)
    (* x x))
#+end_src

is Lisp code where the last thing should be returned. From library-of-babel.org:

#+name: json
#+begin_src emacs-lisp :var file='() :var url="">
  (require 'json)
  (cond
   (file
    (org-babel-with-temp-filebuffer file
      (goto-char (point-min))
      (json-read)))
   (url
    (require 'w3m)
    (with-temp-buffer
      (w3m-retrieve url)
      (goto-char (point-min))
      (json-read))))
#+end_src

And this calling a sample json-containing file gives

#+call: json(file="jsontest1")

| glossary | (title . example glossary) | (GlossDiv (title . S) (GlossList (GlossEntry (ID . SGML) (SortAs . SGML) (GlossTerm . Standard Generalized Markup Language) (Acronym . SGML) (Abbrev . ISO 8879:1986) (GlossDef (para . A meta-markup language, used to create markup languages such as DocBook.) (GlossSeeAlso . [GML XML])) (GlossSee . markup)))) |

which is correct, although not in list form. So again I'm looking at elisp code that is not in the form of a function. So I'm guessing "functions" cannot be #+call'ed, just "headless" elisp code. So what advantage does LOB offer?

On Tue, Apr 3, 2018 at 5:39 PM, Berry, Charles <address@hidden> wrote:


> On Apr 3, 2018, at 1:31 PM, Lawrence Bottorff <address@hidden> wrote:
>
> I've been trying to grok LOB again. So I've cloned the worg git and library-of-babel.el is one of the files. org-babel-lob-injest didn't work,


Try

M-x org-babel-lob-ingest RET org/worg/library-of-babel.org RET

Don't be a jester, be an ingester. ;-)


> so I customized org-babel-lob-files and inserted .../worg/library-of-babel.el . . . and it did in fact get added to my init.el under the custom-set-variables:
>
>  '(org-babel-lob-files (quote ("~/org/worg/library-of-babel.org")))
>
> I checked org-babel-library-of-babel variable, and the new things seemed to be there, although it's rather mind-bending to know I will be calling LOB code that is internally stored inside of an association list.
>
> Now, in my org file I put this:
>
> #+lob: write(file="jsontest")


See (info"(org) Evaluating code blocks")

The proper idiom is

        #+call: write(file="jsontest")

Of course, there needs to be a proper 'write' src block in the file you ingested, etc.

>
> and try C-c C-c on it. Nothing. My minibuffer says "local setup has been refreshed". How does one use, call a LOB function? Also, while I'm demonstrating my rank noobian-ness, I try this:
>
> #+name: myelsquare
> #+header: :var x=0
> #+begin_src emacs-lisp
>   (* x x)
> #+end_src
>
> #+call: myelsquare(x=6)
>
> #+RESULTS:
> : 36
>
> but this results in
>
> #+name: myelsquare
> #+header: :var x=0
> #+begin_src emacs-lisp
>   (defun myelsquare (x)
>       (* x x))
> #+end_src
>
> #+call: myelsquare(x=6)
>
> #+RESULTS:
> : myelsquare2


Is this *verbatim* ? Did you cut and paste everything (including the trailing `2') all at once? If so, I do not get it.

I would have expected

#+RESULTS:
: myelsquare

 which is the correct behavior.

To see why put point in the myelsquare src block and type C-c C-v v

then move point to the end of the 'preview' buffer and type C-x C-e.

Look at the value echo-ed in the minibuffer.

If it still isn't clear maybe `M-x (symbol-function 'myelsquare)' will help.

HTH,

Chuck


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