In this case it is the same as with a normal array.
function dotProduct(v1, v2) {
return v1.map(function (e, i) {return e*v2[i];}).reduce(function (a, b) {return
a+b;});
}
- Rick
From: [email protected] [mailto:[email protected]] On
Behalf Of Norm Rubin
Sent: Thursday, April 04, 2013 2:31 PM
To: [email protected]
Subject: parallel map and dot product
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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