sum of repeating keywords in a nested map

how to get sums of repeating keywords in a nested map.
For instance if i have a map:
{:a 1 :c { :a 2}} how do write a function
(f map :a) -> 3
chaow 22 hours ago
imagine the nested map has multiple levels and i am only interested in summing the values of a certain keyword that might be repeating at different nested level of the map, could also be in a vector
chaow 22 hours ago
i tried postwalk but it doesnt seem to be fit for the task
hindol 22 hours ago
I take back my statement. Typed without thinking.
noisesmith 22 hours ago

user=> (->> (tree-seq coll? seq {:a 1 :c { :a 2}}) (filter map-entry?) (filter (comp #{:a} key)) (map val) (apply +))
3

noisesmith 22 hours ago
I think this one is better, does the same thing

user=> (->> (tree-seq coll? seq {:a 1 :c { :a 2}}) (filter map?) (keep :a) (apply +))
3

(edited)
hindol 22 hours ago
Thanks, I was actually thinking about tree-seq. Forgot the name.
chaow 22 hours ago
wow thanks, that works great! my postwalk involved atoms to track a counter but now i see that theres a much simpler way
noisesmith 22 hours ago
tree-seq is great for when I want to process my tree as if it were a graph :D
noisesmith 22 hours ago
that is, if only data types / keys are significant, and not the relative layer in the nest

No repository file or test is named. Start with the nested-map example and the mentioned tree-seq approach; done means documenting or demonstrating a function that sums matching keyword values through nested maps and vectors.