On Feb 3, 11:09 pm, Rich Hickey <richhic...@gmail.com> wrote:
> On Feb 3, 4:43 pm, Anand Patil <anand.prabhakar.pa...@gmail.com>
> wrote:
> No, it's not. as the docs for preduce say:http://clojure.org/api#preduce
>
> "Also note that (f base an-element) might be performed many times"
>
> in fact, an arbitrary number of times depending on how many parallel
> tasks are fired up. So, the function with base value should produce an
> identity, e.g. (+ 0 x) and (* 1 x), and your q with 0 does not.
Ah, thanks. I interpreted the docs as meaning preduce might do this:
(q (q (q 2 0) (q 3 0)) (q 1 0))
meaning (f base an-element) is performed many times, but just once per
an-element. I didn't understand that f with base needed to be an
identity.
Anand
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