Show number of used exercises

[thorstengrothe]

Is there a command showing the number of used exercises in a \buildset?

[Strauman]

Not builtin, but can be made with the following

\documentclass{article}
\usepackage{exercisebank}
% ... preamble stuff
\newcounter{numexercises}
% Use a hook. There are many of them and they are documented
% This would trigger once per problem in a file
% For a partproblem, you'd do e.g. \At\BeginPartproblem{}
\At\BeginProblem{\global\stepcounter{numexercises}}
\begin{document}
    \buildsets{list,of,sets}
    \thenumexercises %<- Contains the number of exercises.
\end{document}

If you'd need to use this inside the exercises or before the \buildsets is run, you can
make a command to "remember" the count over several runs. That is you could do

\documentclass{article}
\usepackage{exercisebank}
% Commands to "remember" the count for multiple runs
\makeatletter
\gdef\later#1{
  \providecommand#1{}
}
\gdef\setforlater#1#2{
    \immediate\write\@auxout{\string\gdef\string#1{#2}}%
}
\makeatother
% define a "remembering" \exercisecount
\later\exercisecount
%... preamble stuff
\newcounter{numexercises}
% Use a hook. There are many of them and they are documented
% This would trigger once per problem in a file
% For a partproblem, you'd do e.g. \At\BeginPartproblem{}
\At\BeginProblem{\global\stepcounter{numexercises}}
\begin{document}
    \exercisecount %<- Contains the number of exercises (after the first build).
    \buildsets{list,of,sets}
    % Tell \exercisecount to remember the numexercisescounter
    \setforlater\exercisecount{\thenumexercises}
\end{document}

If you're building using e.g. latexmk, this will just work out of the box, but if you're manually running, say, pdftex, then you have to run pdftex multiple times for the latter to work.

Edit: forgot \makeatletter

[thorstengrothe]

Ah, that was exactly my desire - I need the command before the buildset is run, I will try it!
Thank you for the fast response!

P. S. In the next few weeks I will have a lot of exams for my courses and I'm planning to do them all with exercisebank, I think reality is the best test for this package. When I'm done I will report my experiences!

Thorsten

[thorstengrothe]

The command works until this line, (see my comment in the code):

...
\begin{document}
    \exercisecount 
    \buildsets{list,of,sets}
     % \setforlater\exercisecount{\thenumexercises} --> uncommenting this leads to an error
\end{document}

This is the error message:

[Strauman]

Forgot \makeatletter and \makeatother. Updated. Try now!

[thorstengrothe]

Works perfectly now!