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deque-blog/triboard.utils.group-by-reducer.cljs

Created March 8, 2017 23:39
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triboard.utils.group-by-reducer.cljs
(defn group-by-reducer
"Create a reducer that groups by the provided key"
[& key-fns]
(fn
([] {})
([result] result)
([result val]
(let [keys ((apply juxt key-fns) val)]
(update-in result keys conj val)))))
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