parallel map and dot product

Till Schneidereit tschneidereit at gmail.com
Thu Apr 4 11:58:23 PDT 2013


Hi Norm,

the people behind ParallelArray mostly aren't on es-discuss, so you'll
probably have more luck here:
https://lists.mozilla.org/listinfo/dev-tech-js-engine-rivertrail

hth,
till


On Thu, Apr 4, 2013 at 8:31 PM, Norm Rubin <nrubin at nvidia.com> wrote:

> I’ve started to read through the parallel JavaScript  proposal  and have a
> novice question****
>
> How would you write a dot product****
>
> Given:****
>
> ** **
>
> P1 = parallelArray(1,2,3)****
>
> P2 = ParallelArray(4,5,6)****
>
> ** **
>
> We want to compute ****
>
> 1*4 + 2*5 + 3*6****
>
> ** **
>
> As far as I can tell, you need a reduce to do the sums, so you first need
> to construct ****
>
>  P12 = ParallelArray(1*4, 2*5, 3*6)****
>
> ** **
>
> Is there a way to generate this using map?****
>
> ** **
>
> ** **
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