Array Reduce Matrix Product

array_reduce_matrix.js

var matrix1 = [
  [1, 1, 4, 5],
  [0, 3, 3, 2],
  [3, 1, 1, 0]
]

var coeficients = [0.3, 0.5, 0.2];

function weirdComputation(matrix) {
  var m = matrix;
  return function (product, coeficient) {
      product.push([
        m[0][0] * coeficient + m[0][1] * coeficient + m[0][2] * coeficient + m[0][3] * coeficient,
        m[1][0] * coeficient + m[1][1] * coeficient + m[1][2] * coeficient + m[1][3] * coeficient,
        m[2][0] * coeficient + m[2][1] * coeficient + m[2][2] * coeficient + m[2][3] * coeficient,
      ]);
      return product;
  }
};
coeficients.reduce(weirdComputation(matrix1), []);

//[
//  [3.3, 2.4, 1.5],
//  [5.5,   4, 2.5],
//  [2.2, 1.6,   1]
//]