[rucksack-devel] Re: Fwd: State of the nation and heap patch

[Arthur Lemmens]

Sean Ross wrote:

>> My idea was that there might be situations where you want to do
>> something with sets of objects without actually having to load them.
>> But I'm not so sure that was a good idea, and I don't think it's used
>> anywhere in the Rucksack code at the moment.
>
> Good point, I wonder if that can be implemented using something like
> a map-keys function on the class index, which would allow the :id-only
> keyword to be resurrected.

I'm afraid I don't understand this.   Wouldn't such a MAP-KEYS function
do basically the same thing as RUCKSACK-MAP-CLASS?

Arthur