Hi,
Mike Fikes <mikefi...@me.com> wrote:
> In fact, section 5 of that document defines comp as a reduce
> involving the identify function in some way. (Now, I want to re-read
> this paper, but translated into Clojure.)
Here's one definition of comp in terms of reduce:
(defn comp [& fs]
(reduce (fn [result f]
(fn [& args]
(result (apply f args))))
identity
fs))
It's probably a bit clearer with one of the anonymous functions pulled
out and named:
(defn comp [& fs]
(letfn [(chain [result f]
(fn [& args]
(f (apply result args))))]
(reduce chain identity fs)))
They're less efficient than clojure.core/comp's implementation, but I
love the versatility of {reduce,fold,whatever}.
Best regards,
John
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