comparing-arrays

const a = [1, 2, 3];
const b = [4, 5, 6];
const c = [1, 2, 3];

function arrayEquals(a, b) {
  return (
    Array.isArray(a) &&
    Array.isArray(b) &&
    a.length === b.length &&
    a.every((val, index) => val === b[index])
  );
}

arrayEquals(a, b); // false
arrayEquals(a, c); // true

// With sorting and dups
const d = [1, 2, 3, 1];
const e = [3, 2, 1, 3];

function arraysAreEqual(a, b, field) {
  if (!Array.isArray(a) || !Array.isArray(b)) return false;

  // Remove Dups and sort
  let arrayA = [...new Set(a)].sort();
  let arrayB = [...new Set(b)].sort();

  if (field) {
    // Do something with field
  }

  return (
    arrayA.length === arrayB.length &&
    JSON.stringify(arrayA) === JSON.stringify(arrayB) &&
    arrayA.every((value, index) => value === arrayB[index])
  );
}

console.log(arraysAreEqual(d, e)); // true