robosats/frontend/src/utils/weightedMean.ts

export const weightedMean = (arrValues: number[], arrWeights: number[]): number => {
  if (arrValues.length === 0) {
    return 0;
  }
  const result = arrValues
    .map((value, i) => {
      const weight = arrWeights[i];
      const sum = value * weight;
      return [sum, weight];
    })
    .reduce((p, c) => [p[0] + c[0], p[1] + c[1]], [0, 0]);

  return result[0] / result[1];
};

export default weightedMean;