15 lines
314 B
Clojure
15 lines
314 B
Clojure
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(ns fira-code.coll)
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(defn index-of [pred xs]
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(let [res (reduce (fn [i x] (if (pred x) (reduced i) (inc i))) 0 xs)]
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(assert (< res (count xs)) "Nothing found")
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res))
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(defn group-by-to [key-fn value-fn xs]
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(reduce-kv
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(fn [m k vs]
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(assoc m k (value-fn vs)))
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{}
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(group-by key-fn xs)))
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