Re: Detectiing footnotes in Lua scripts

[Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>]

ffi.appdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org writes:

> Looking at the PR, I spotted a typo on line 233 of doc/lua-filter.md:
> "be" should be deleted from "will be try the following filter
> functions".

Thanks, fixed.

> I see that the documentation only illustrates how to not traverse
> footnotes. Should it also illustrate how to apply a separate filter?
> The walk() method is new to me.

Indeed, it *is* new. The `walk` methods are basically more convenient
variants of `pandoc.utils.walk_inline` and `pandoc.utils.walk_block`,
but are now available on Pandoc, Block, and Inline objects, as well as
on lists of blocks (Blocks) and lists of inlines (Inlines). The method
is documented in each of these types; here it is for Block values:
https://github.com/jgm/pandoc/blob/master/doc/lua-filters.md?plain=1#L916-L947

Examples using `walk` will include
<https://github.com/jgm/pandoc/blob/master/doc/lua-filters.md#counting-words-in-a-document>
and
<https://github.com/jgm/pandoc/blob/master/doc/lua-filters.md#modifying-pandocs-manualtxt-for-man-pages>

A good example to demo its use in combination with `traverse =
'topdown'` could be helpful.