[Orgmode] Newbie elisp programmer requests a pointer to backtics...
Hi there, Many thanks for org-mode and all of its amazing capabilities. This elisp newbie (but fluent in many other languages) has a concrete and simple request: Where do I find good-enough documentation for the backtics prefixing the parenthesis and the commas prefixing the associative list values in the following code (lines of interest prefixed by here-, uninteresting lines elided): (setq observer-base-dir ~/projects/blogs/observer) (setq observer-blog-dir (concat observer-base-dir /jekyll/_posts)) (add-to-list 'org-publish-project-alist here- `(observer-blog here- :base-directory ,observer-base-dir here- :publishing-directory ,observer-blog-dir . . . here-`(observer :components (observer-blog))) I greatly prefer a pointer to the fundamental docs in lieu of an explanation here. I figured these out by mimicking working code, and they work for me. But what are these operators|delimiters actually doing? I have both the latest versions of the GNU Emacs Lisp Reference Manual and the Introduction to Programming in Emacs Lisp, sitting before me and they have been extensively interrogated, as has google. Yet still I have to bother the list. I'm sorry! Many thanks, Russell ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
Russell L. Carter wrote: I greatly prefer a pointer to the fundamental docs in lieu of an explanation here. I figured these out by mimicking working code, and they work for me. But what are these operators|delimiters actually doing? I have both the latest versions of the GNU Emacs Lisp Reference Manual and the Introduction to Programming in Emacs Lisp, sitting before me and they have been extensively interrogated, as has google. Yet still I have to bother the list. I'm sorry! These things are called backquotes, discussed in GNU Emacs Lisp Reference Manual Section 13.5. HTH -- David -- OpenPGP... 0x99ADB83B5A4478E6 Jabber dmj...@jabber.org Email. dm...@ictsoc.de pgp7BImnRX9Ez.pgp Description: PGP signature ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
On Tue, 13 Apr 2010 17:19:46 -0700, Russell L. Carter rcar...@pinyon.org wrote: Where do I find good-enough documentation for the backtics prefixing the parenthesis and the commas prefixing the associative list values in the following code (lines of interest prefixed by here-, uninteresting lines elided): Hello, I had the same question a few months ago. I googled something like lisp backquote comma and found these links: - http://www.psg.com/~dlamkins/sl/chapter20.html - http://cl-cookbook.sourceforge.net/macros.html Hope this helps :) Regards, -- Thomas/Schnouki pgpCv6oPPyM4A.pgp Description: PGP signature ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
A back-quoted form is just like a quoted form, except every ,foo is substituted by the evaluation of foo. (defvar foo 123) `(foo ,foo) = '(foo 123) They can be nested: `(foo `(foo ,,foo)) And lists can be directly interpolated: (defvar foo '(123 456)) `(foo ,foo) = '(foo (123 456)) `(foo ,@foo) = '(foo 123 456) You can do this to see how any form will expand: M-: (pp-to-string (macroexpand `(foo ,foo))) John ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
Thomas Jost schno...@schnouki.net writes: On Tue, 13 Apr 2010 17:19:46 -0700, Russell L. Carter rcar...@pinyon.org wrote: Where do I find good-enough documentation for the backtics prefixing the parenthesis and the commas prefixing the associative list values in the following code (lines of interest prefixed by here-, uninteresting lines elided): Hello, I had the same question a few months ago. I googled something like lisp backquote comma and found these links: - http://www.psg.com/~dlamkins/sl/chapter20.html - http://cl-cookbook.sourceforge.net/macros.html And for a scarily in-depth tutorial on lisp evaluation and macros (most of which afaIaw translates fairly directly to elisp) http://www.paulgraham.com/onlisptext.html (I have a long way to go with that one...) Dan Hope this helps :) Regards, ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
David Maus wrote: Russell L. Carter wrote: These things are called backquotes, discussed in GNU Emacs Lisp Reference Manual Section 13.5. Ah. Looking at that section, backquote instead of backtic, and the comma is a special marker. Exactly what I needed. Much obliged, Russell HTH -- David -- OpenPGP... 0x99ADB83B5A4478E6 Jabber dmj...@jabber.org Email. dm...@ictsoc.de ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] Newbie elisp programmer requests a pointer to backtics...
Dan Davison wrote: Thomas Jost schno...@schnouki.net writes: I had the same question a few months ago. I googled something like lisp backquote comma and found these links: - http://www.psg.com/~dlamkins/sl/chapter20.html - http://cl-cookbook.sourceforge.net/macros.html And for a scarily in-depth tutorial on lisp evaluation and macros (most of which afaIaw translates fairly directly to elisp) http://www.paulgraham.com/onlisptext.html Thanks all. Scanning through these they look most excellent. I have been putting off this day for 20 years, but because of org-mode I'm now learning elisp. Best, Russell (I have a long way to go with that one...) Dan Hope this helps :) Regards, ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
