Hi Peter, thanks for the help! The additional { must have been a fluke with copy/paste; wasn't in my file. By sheer stubbornness, I tried until I found something that works: command={{\determineheadnumber[section]}\ifodd\currentheadnumber \resetSlideNumber\incrementSlideNumber \else\incrementSlideNumber \fi}] So after \determineheadnumber[something], \currentheadnumber appears to have that value and doesn't take an argument. Thanks, and best Thomas On Apr 20, 2006, at 5:14 PM, Peter Rolf wrote:

Hi Thomas,

Thomas A. Schmitz wrote:

...

Hi,

I have a counter which I want to be incremented after every \section command and reset after every odd \section (don't ask why...). So I tried this approach:

\setuphead[section] [command={{{\determineheadnumber[section]} ^^^^ one opening brace too much

If you problem remains, try to add a \expandafter in front of \ifodd. Sometimes it is also helpful to enclose the number expression by \numexpr ... \relax (for conversion).

Greets, Peter

Thomas A. Schmitz wrote:

Hi Peter,

thanks for the help! The additional { must have been a fluke with copy/paste; wasn't in my file. By sheer stubbornness, I tried until I found something that works: command={{\determineheadnumber[section]}\ifodd\currentheadnumber \resetSlideNumber\incrementSlideNumber \else\incrementSlideNumber \fi}]

why not directly use the slidenumber \def\SlideNumber{1} command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\doglobal\increment\SlideNumber\fi}} command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\gdef\SlideNumber{2}\fi}} command={\xdef\SlideNumber{\ifodd\SlideNumber\space1\else2\fi}} \def\SlideNumber{\ifconditional\OddSlide1\else2\fi} command=\ifodd\settrue\OddSlide\else\setfalse\OddSlide\fi etc etc

So after \determineheadnumber[something], \currentheadnumber appears to have that value and doesn't take an argument.

Thanks, and best

Thomas

On Apr 20, 2006, at 5:14 PM, Peter Rolf wrote:

...

Hi Thomas,

Thomas A. Schmitz wrote:

...

Hi,

I have a counter which I want to be incremented after every \section command and reset after every odd \section (don't ask why...). So I tried this approach:

\setuphead[section] [command={{{\determineheadnumber[section]}

^^^^ one opening brace too much

If you problem remains, try to add a \expandafter in front of \ifodd. Sometimes it is also helpful to enclose the number expression by \numexpr ... \relax (for conversion).

Greets, Peter

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\determineheadnumber[section]

Thanks for mentioning that command, which I'd been looking for. I couldn't quite get it to work, but reading the code near its definition helped me solve another problem. Each chapter has a section for exercises, and each exercise is a subsection with a short title (a few words). e.g. \exercise{Batteries} What is the cost of energy from a 9V battery? From a wall socket (the mains)? I want the exercises to be numbered just by the exercise number (e.g. 7), not for example 1.6.7 (if the exercises are the 6th section in chapter 1). Hence this setup: \definehead[exercise][subsection] \def\choptwo#1.#2.{} \def\processtwo#1{\expandafter\choptwo#1\relax} \setuphead[exercise][style=italic, numbercommand={\processtwo{\currentheadnumber} \gobbleoneargument}] If there's an easier way using \determineheadnumber, I'll be happy to use it instead but the above probably fragile hack works for me. The more obvious try \def\choptwo#1.#2.{} \setuphead[subsection][numbercommand={\expandafter\choptwo}] produced 200 lines of complaint, starting with: ERROR: Argument of \choptwo has an extra }. In the following minimal example of my attempt to use determineheadnumber, the subsection numbers are missing (instead of being the chapter number): \setuphead[subsection] [numbercommand={\determineheadnumber[chapter] \gobbleoneargument}] \starttext \chapter{One} \section{A1} hi \subsection{B1} hi \subsection{B2} hi \stoptext

...

\setuphead[section] [command={{{\determineheadnumber[section]}

^^^^ one opening brace too much

That's why I want the editor to insert } for me automatically when I type { (in the earlier thread about AUCTeX/Emacs). -Sanjoy `Never underestimate the evil of which men of power are capable.' --Bertrand Russell, _War Crimes in Vietnam_, chapter 1.