[LON-CAPA-users] Preprocessor vs. Custom Response

[Jacob Bond]

>If this is really a static answer format, then it should indeed be a stringresponse. Note that stringresponses also take >regular expressions, so you can do
>
>/(2\.5)|(5\/2)/
>
>to do “or” - you don’t need a preprocessor. LON-CAPA also has an explicit “or”, I think there’s a template for it. It >may be “or” for numerical, but you can replace numerical by string.
>
>In general, for things that are numerical (and not “static” like the above), the main decision criterion for >preprocessor versus customresponse is whether you need the luxuries of numericalresponse:
>
>* significant digits
>* tolerances
>* automated bubblesheet production
>* easy printout of correct solution after answer date
>
>If you can benefit from those luxuries, use numericalresponse and preprocessor. If not, or if those things are in the >way, use customresponse.
>
>Sorry, I need to run for a meeting. Hope this helps,
>
>- Gerd.

It is not a static answer.  I was not aware of the regular expression option, this is promising and I think I could do either substitution ($frac =~ s/\//\\\//;) or split (@fracarray = split('/', $frac);) and concatenate strings into the desired regular expression.

Also, I have attempted using an <answergroup> under a <stringresponse> and it just doesn't recognize it.

Thank you!
Jacob