Re: Library of Babel confusion

[Lawrence Bottorff <borgauf@gmail.com>]

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Thanks for the help. However, one mystery still remains: Why is this

 '(org-babel-lob-files (quote ("~/org/worg/library-of-babel.org")))

in my init.el's custom-set-variables not getting handled? I always have to
do an org-babel-lob-ingest to actually get library-of-babel.org loaded.

On Fri, Apr 6, 2018 at 10:38 PM, Berry, Charles <ccberry@ucsd.edu> wrote:

>
>
> > On Apr 6, 2018, at 4:59 PM, Thomas S. Dye <tsd@tsdye.com> wrote:
> >
>
> [Tom's response covering the main issues deleted]
>
> > hth,
> > Tom
> >
> > Lawrence Bottorff writes:
> >
> >> 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.
>
>
> `C-h k' is really your friend here. If you do not know it, try typing it
> twice `C-h k C-h k'.
>
> As for the specific keystrokes mentioned above:
>
> ,----[ C-h k C-c C-v v ]
> | C-c C-v v runs the command org-babel-expand-src-block (found in
> | org-mode-map), which is an interactive autoloaded compiled Lisp
> | function in ‘ob-core.el’.
> |
> | It is bound to C-c C-v v, C-c C-v C-v.
> |
> | (org-babel-expand-src-block &optional ARG INFO PARAMS)
> |
> | Expand the current source code block.
> | Expand according to the source code block’s header
> | arguments and pop open the results in a preview buffer.
> |
> | [back]
> `----
>
> In your case, it shows that the `mtelsquare' src block expands to:
>
>
> ,----
> | (let ((x (quote 0)))
> | (defun myelsquare (x)
> |   (* x x))
> | )
> `----
>
>
> ,----[ C-h k C-x C-e ]
> | C-x C-e runs the command eval-last-sexp (found in global-map), which
> | is an interactive compiled Lisp function in ‘elisp-mode.el’.
> |
> | It is bound to C-x C-e.
> |
> | (eval-last-sexp EVAL-LAST-SEXP-ARG-INTERNAL)
> |
> | Evaluate sexp before point; print value in the echo area.
> | Interactively, with prefix argument, print output into current buffer.
> |
> | Normally, this function truncates long output according to the value
> | of the variables ‘eval-expression-print-length’ and
> | ‘eval-expression-print-level’.  With a prefix argument of zero,
> | however, there is no such truncation.  Such a prefix argument
> | also causes integers to be printed in several additional formats
> | (octal, hexadecimal, and character).
> |
> | If ‘eval-expression-debug-on-error’ is non-nil, which is the default,
> | this command arranges for all errors to enter the debugger.
> |
> | [back]
> `----
>
> So with point at the end of the preview buffer for myelsquare (which has
> one `let' expression it it) it has the same effect as running
> `eval-buffer'. viz, the elisp function `myelsquare' is created.
>
> If you have gotten this far, there is an lisp function called `myelsquare'
> and the `symbol-function' expression will return its value when properly
> `eval'ed. I misspoke before. I should have said
>
>         M-: (symbol-function 'myelsquare) RET
>
> And that value is `(lambda (x) (* x x))'. Which simply shows you have
> defun'ed a function and what it is.
>
> Once you have an elisp function, the natural way to call it is
> src_emacs-lisp{(myelsquare 1.5)}.
>
> One thing you can do with LOB blocks is use them in header args of src
> blocks just as you would use calls to ordinary src blocks.
>
> HTH,
>
> Chuck
>
>
>

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