sum-product
Simple and small standalone function to calculate the sum of the product of array items.
sumProduct([0,1], [2,3], [4,5]) // 0*2*4 + 1*3*5 = 15
Uses a modified Kahan sum to reduce floating point errors.
Usage
The function takes any number of arrays.
var sumProduct = var result = // 0*2*4 + 1*3*5 = 15result = // ==>0result = // ==>0result = // ==>NaN
License
Released under the MIT License