[NTG-context] Re: page number in \setuplist

9 Feb 2025

...
On 8 Feb 2025, at 21:38, Pablo Rodriguez via ntg-context  wrote:
Dear list,
I would like to have chapters in bodypart to list two numbers, the
previous to the current page and the current page, such as in:
14 · 15           24·25           50 · 51           100 · 101
I tried the following command, but I cannot get the previous to the
current page number:
\setuplist[chapter]
   [pagecommand={\the\numexpr\currentlistentrypagenumber-1\ ·}]
What am I missing here?
The obvious arithmetic order doesn't work for reasons that aren't obvious to me. :-(

Try this:

\def\doPageNumber#1{\the\numexpr -1 + #1\relax\ · #1}
\setupcombinedlist[content][list={chapter}]
\setuplist[chapter][pagecommand=\doPageNumber]

\starttext
\completecontent
\page
\doloopoverlist
  {one,two,three,four,five}
  {\chapter{Title \recursestring}
   \input tufte
   \page
  }
\stoptext 

(I'll leave Hans or Wolfgang to explain why the chapter title doesn't work but that's not an issue for you.)

—
Bruce Horrocks
Hampshire, UK