Colin Yates <colin.ya...@gmail.com> writes:

> This and Jonas' are my current favourites, for what that's worth.
>
> Keep the suggestions coming! 

here's another one that uses reductions. formatter would need to be
adapted a bit, since it currently also adds "_0" for the first name
seen:


(defn count-name
  [name->count name]
  (assoc name->count name (inc (get name->count name 0))))

(defn uniquify
  ([s] (uniquify s (fn [item duplicates] (str item "_" duplicates))))
  ([s formatter]
     (map (fn [name name->count]
            (formatter name (get name->count name 0)))
          s
          (reductions count-name {} s))))

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