Re: Failed to skip from chapter tex file to master pdf file.

[Hongyi Zhao]

On Mon, Jul 12, 2021 at 3:46 PM Tassilo Horn <tsdh@gnu.org> wrote:
>
> Hongyi Zhao <hongyi.zhao@gmail.com> writes:
> >> (delq nil (mapcar (lambda (buf)
> >>                     (with-current-buffer buf
> >>                       (when (eq major-mode 'LaTeX-mode)
> >>                         (cons (buffer-file-name buf)
> >>                               (TeX-master-file "pdf")))))
> >>                   (buffer-list)))
> >> nil
> >
> > This is just out of the curiosity about the behavior of the `delq'
> > built-in function used above. According to the built-in document:
>
> (delq nil '(nil 1 nil)) ;=> (1)
> (delq nil '(nil nil nil)) ;=> nil, aka, the empty list ()
> (eq nil '()) ;=> t

Got it. The `nil' shown in my example just means the empty result list
(). The `nil' in itself can be used in different context, when it's
used as boolean variable, it means false. But it can also be used to
represent an empty list ().

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province