In my experience with code that does data ingest and manipulation, assoc-in and update-in are probably the most useful functions. Why? As you get used to funct

In my experience with code that does data ingest and manipulation, assoc-in and update-in are probably the most useful functions. Why? As you get used to functional programming, you look for ways to reach in and 'update'* nested data structures. Since you don't have object dot notation, you need another way. * By 'update' I mean to return a new persistent data structure with a small change.