How I can collapse a nested map with "n" number of keys (tiers) to create a sequence of flat maps which are comprised of composite keys and a values.
For example, let's say we have:
I'd like to collapse the nest into a sequence of flat maps like:
Joined: Apr 22, 2010
I've put together a solution (see below) that collapses nested maps into a sequence of flat maps with composite keys. Unfortunately, the solution wraps the result within another list, anyone know why? Thanks.