- map-ref-in map keys #!optional not-foundprocedure
Recursively looks up the list of keys in the nested map and returns the value associated with the innermost key or not-found (default #f) if one of the keys does not exist.
Example:
(define m (persistent-map 'foo (persistent-map 'bar (persistent-map 'qux 123)))) (map-ref-in m '(foo bar qux)) => 123 (map-ref-in m '(foo qux)) => #f