JAVASCRIPT

sum of two array in javascript

function sumArray(a, b) {
      var c = [];
      for (var i = 0; i < Math.max(a.length, b.length); i++) {
        c.push((a[i] || 0) + (b[i] || 0));
      }
      return c;
}

sum of two array in javascript

function sumArrays(...arrays) {
  const n = arrays.reduce((max, xs) => Math.max(max, xs.length), 0);
  const result = Array.from({ length: n });
  return result.map((_, i) => arrays.map(xs => xs[i] || 0).reduce((sum, x) => sum + x, 0));
}

console.log(...sumArrays([0, 1, 2], [1, 2, 3, 4], [1, 2])); // 2 5 5 4

javascript sum of multiple array

function sum(arrays) {
  return arrays.reduce((acc, array) => acc.map((sum, i) => sum + array[i]), new Array(arrays[0].length).fill(0));
}

const arrays = [
  [4, 6, 3, 2],
  [1, 4, 7, 9],
  [4, 6, 3, 2],
  [1, 4, 7, 9]
];

const result = sum(arrays);
console.log(result);
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