Created
July 27, 2011 03:08
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| (defn group-indices [coll] | |
| (loop [[head & tail] coll | |
| new-ids {} | |
| next-id 0 | |
| ret []] | |
| (let [found-id (get new-ids head) | |
| [new-ids next-id] (if found-id | |
| [new-ids next-id] | |
| [(assoc new-ids head next-id) (inc next-id)])] |
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