Re: Counting number of children under heading

[Thorsten Jolitz <tjolitz@gmail.com>]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> I could have sworn someone posted a thing for this just a week or two
> ago, using `org-map-entries' and the identity function, and counting the
> results. 

Ups, that was me  ... forgot about it ;)

#+begin_quote
From: Martin Gross <m-gross@gmx.net>
Subject: Re: Get counting of items
Newsgroups: gmane.emacs.orgmode
To: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
Date: Thu, 3 Apr 2014 10:39:18 +0200 (2 weeks, 3 hours, 19 minutes ago)

Dear Thorsten

> Here is a generalised form:
>
> #+begin_src emacs-lisp
>   (defun count-org-items (&optional level operator match scope skip)
>     "Print a counting of outline items."
>     (interactive)
>     (let ((headline-level (or level 1)) ; 1-8
>           (op (or operator '=))) ; '>= '<= '> '<
>     (save-excursion
>       (message "Counting of level%s%d outline items (match=%s, scope=%s, skip=%s): %d"
>                op headline-level match scope skip
>                (eval (append (list '+)
>                              (org-map-entries
>                               `(lambda () (if (,op (org-outline-level) ,headline-level) 1 0))
>                               match scope skip)))))))
> #+end_src
>
> usage:
>
> ,----------------------------------------
> | (count-org-items 2 '<= "WAITING" 'file)
> `----------------------------------------
>
> result:
>
> ,------------------------------------------------------------------------------
> | "Counting of level<=2 outline items (match=WAITING, scope=file,
> | skip=nil): 3"
> `------------------------------------------------------------------------------
>
> see C-h f org-map-entries for more info, its very powerfull. Use it
> with M-: (count-org-items ...) or write a more sophisticated
> (interactive) spec.
#+end_quote

-- 
cheers,
Thorsten