Hello fellow Clojurians,
I have just released the first version of clj-conduit
<https://github.com/hyPiRion/clj-conduit> – a small library that attempts
to make transducers a bit more readable.
To give you a taste, here's the take transducer implemented with
clj-conduit:
(ns my.namespace
(:refer-clojure :exclude [await])
(:require [com.hypirion.conduit :refer [await yield conduit]]))
(defn taking [n]
(conduit
(dotimes [_ n]
(yield (await)))))
Compare this with how take is implemented in clojure.core:
(defn take
([n]
(fn [rf]
(let [nv (volatile! n)]
(fn
([] (rf))
([result] (rf result))
([result input]
(let [n @nv
nn (vswap! nv dec)
result (if (pos? n)
(rf result input)
result)]
(if (not (pos? nn))
(ensure-reduced result)
result)))))))
...)
Information about usage and source code can be found over at
https://github.com/hyPiRion/clj-conduit
https://github.com/hyPiRion/clj-conduit/wiki/clojure.core-ports contains
all the clojure.core transducers implemented with conduit, to give you some
examples to look at.
I also wrote a blogpost about it, explaining usage, implementation details
and the
rationale: http://hypirion.com/musings/transducers-to-conduits-and-back
-- Jean Niklas
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