On Tue, Apr 4, 2017 at 11:31 AM, Trey Ethan Harris <treyhar...@gmail.com> wrote: > (I can use classify-list to do this ad-hoc, or even just do a simple map as > I might in Perl 5, but I'm thinking of each key's relationship to and > extraction from its value as being a feature of the collection, not of the > way I construct it.)
Uhm...not clear to me the aim, but sounds like you want to index differently objects depending on the type of the collection you are using. If this is the case, and the adoption of the suggested .WHICH is therefore not appropriate, you must have a way to map-and-sort your objects using different attributes. I don't see a very elegant way to achieve this without having to build an ad-hoc container... Otherwise, the .WHICH is what you are looking for. Luca
