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igrishaev/trade_finance_test.clj

Created January 11, 2024 15:45
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trade_finance_test.clj
(defn index-by
"Return a map where a key is (f item) and a value is item."
{:added "1.11"
:static true}
[f coll]
(persistent!
(reduce
(fn [ret x]
(assoc! ret (f x) x))
(transient {}) coll)))
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