(reduce-kv f init coll)
Reduces an associative collection. f should be a function of 3
arguments. Returns the result of applying f to init, the first key
and the first value in coll, then applying f to that result and the
2nd key and value, etc. If coll contains no entries, returns init
and f is not called. Note that reduce-kv is supported on vectors,
where the keys will be the ordinals.
Source
(defn
reduce-kv
"Reduces an associative collection. f should be a function of 3\n arguments. Returns the result of applying f to init, the first key\n and the first value in coll, then applying f to that result and the\n 2nd key and value, etc. If coll contains no entries, returns init\n and f is not called. Note that reduce-kv is supported on vectors,\n where the keys will be the ordinals."
([f init coll] (if-not (nil? coll) (-kv-reduce coll f init) init)))