Here's the code analogue of your find-assoc-in function for the approach
Cedric is proposing. I actually came to the same solution before reading
the responses to your post, so it's good to see that others also think this
is a more memory efficient approach (obviously for larger vectors than the
example).
(defn my-find-assoc-in
[[test-key update-key] [test-val update-val] mapvec]
(reduce
(fn [v idx] (if (= (get-in v [idx test-key]) test-val)
(assoc-in v [idx update-key] update-val)
v))
mapvec
(range (count mapvec))))
Happy hacking,
~Gary
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