JSFiddle - React, Tailwind, and code Playground

by pierian_design

JavaScript

function sum(args, func) {

  const result = [];

  const length = Math.max(...args.map((item) => item.length));
  console.log(length);
  
  for (let i = 0; i < length; ++i) {
    const arr = args.map((item) => item[i]).filter(Boolean);
    const maxLength = Math.max(...arr.map((item) => item.length));
    result.push([]);
    for (let j = 0; j < maxLength; ++j) {
      result[i].push(arr.map((item) => item[j]).filter(Number).reduce(func));
    }
  }

  return result;
}


var arr1 = [[1, 2], [5, 6, 7], [9, 10, 11, 12]];
var arr2 = [[10, 20, 30], [50, 60, 70, 80]];
var arr3 = [[100, 200, 300, 400], [500, 600], [900, 1000], [1100, 1200]];

/* сложить */
sum([arr1, arr2, arr3], (acc, curr) => acc + curr);

/* умножить */
sum([arr1, arr2, arr3], (acc, curr) => acc * curr);