This is not safe usage, as you are not calling the 'flushing' method
or handle reduced objects. Correct use would be
(def xform (comp (filter odd?) (map #(* % %))))
(def strip-reduced [x] (if (reduced? x) @x x))
(let [r (xform conj)] (strip-reduced (r (strip-reduced (r #{1 2 3}
7))))) ;=> #{1 3 2 49}
(let [r (xform conj)] (strip-reduced (r (strip-reduced (r [1 2 3]
6))))) ;=> [1 2 3]
Even then, you should not pass any function into xform, but only a
function which has 0, 1 and 2 arg arities implemeneted at least.
Jozef
On Thu, Aug 14, 2014 at 12:00 PM, <[email protected]> wrote:
> Some alternate transducers usage:
>
> (def xform (comp (filter odd?) (map #(* % %))))
> ((xform conj) #{1 2 3} 7) ;=> #{1 3 2 49}
> ((xform conj) [1 2 3] 6) ;=> [1 2 3]
>
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