[LON-CAPA-dev] Extracting problems from page or sequence

[Jerf]

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I wrote:
| I am indeed referring to the 'bighash' numbers, but I *think* that they
| are both the same thing, so extracting the ID from the symbolic name
| might work too.

Nope, I was wrong. They aren't the same, as I just found out in my own work.

If you have the source of the map, and the bighash tied into %hash, you
want something like this:

$map_id = $hash{'ids_' . &Apache::lonnet::clutter($mapSrc)};
my $map = $navmap->getById($map_id);

After that, $map->map_start() and $map->map_finish() will give the start
and end resources, which can be passed to the iterator, as described
before. I'm doing something similar right now so I'm reasonably certain
this will work. ;-)
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