(defn frequencies [coll]
(reduce (fn [map val] (assoc map val (if (contains map val)
(get map val) 1)) #{})
)
On Dec 11, 9:21 am, bOR_ <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I thought I remembered there was a method in the api somewhere that
> would count the frequency of each unique item in a collection, but I
> can't find it anymore. What would be a brief way to write that in
> clojure?
>
> (In ruby: array.inject(Hash.new(0)) {|hash,key| hash[key] += 1 ;
> hash})
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