On Sun, Jun 14, 2009 at 4:00 AM, Sudish Joseph<[email protected]> wrote:
>
> On Jun 13, 4:17 pm, Laurent PETIT <[email protected]> wrote:
>> So it really seems to me that the missing abstraction, here, is being
>> able to do a reduce over the list of pixels, and being able, from the
>> reduction function, to quit the reduction early.
>
> A lazy right fold[1] allows short-circuiting, so here's one attempt:
Here's another way to do a sort of lazy reduce:
(use '[clojure.contrib.seq-utils :only [reductions]])
(some #(> % 10)
(reductions (fn [counter pixel] (if (< pixel 10) (inc counter) counter))
0 (iterate dec 15)))
--Chouser
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