Re: Increment an item number?

["Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>]

On 2/14/12 1:48 PM, Hans Hagen wrote:
>> \starttext
>> \startitemize[n]
>> \item First question
>> \phantom{\item }
>> \item Third question
>> \phantom{\item }
>> \item Fifth question
>> \item Sixth question
>> \stopitemize
>> \stoptext
>
> or something
>
> \starttext
> \startitemize[n]
> \item First question
> \incrementnumber[itemgroup:itemize]
> \item Third question
> \incrementnumber[itemgroup:itemize]
> \item Fifth question
> \item Sixth question
> \stopitemize
> \stoptext

Just a hint: however you do it, I think this is not the best approach. 
you write:

> I'm typing out solutions to questions in some student notes, and the
missing item is a question for which a written solution is not necessary.


If this is a recurrent task, i.e. if you regularly make up student 
problems and then typeset the solutions, this approach is inefficient 
because you're doing the book keeping yourself. If, for example, you 
decide to delete one of the questions without written solution, you will 
have to delete the \incrementnumber as well. It may be better if you let 
ConTeXt do the book keeping: give every question a unique identitfier 
like so

\startitem[p:1:2]
  Problem?
\stopitem

and then typeset the solutions by referring back to this identifier:

\sym{\in[p:1:2]}

That way, the numbers in problems and solutions will always be correct, 
even if you rearrange etc. (I often typeset such exercise stylesheets, 
and after many years, that's my approach today.)

Thomas
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