Aha there it is! Thanks so much. I didn't see it because it's under the "Unfolding" section instead of the "Construction" section.

--Myles

On Mon, Sep 17, 2012 at 6:07 AM, Roman Leshchinskiy <rl@cse.unsw.edu.au> wrote:
Myles C. Maxfield wrote:
>
> Overall, I'm looking for a function, similar to Data.Vector's 'generate'
> function, but instead of the generation function taking the destination
> index, I'd like it to take the elements that have previously been
> constructed. Is there such a function? If there isn't one, is this kind of
> function feasible to write? If such a function doesn't exist and is
> feasible to write, I'd be happy to try to write and contribute it.

Indeed there is, it's called constructN (or constructrN if you want to
construct it right to left).

Roman