https://practice.geeksforgeeks.org/problems/find-the-smallest-and-second-smallest-element-in-an-array/0

find-the-smallest-and-second-smallest-element-in-an-array.js

// https://practice.geeksforgeeks.org/problems/find-the-smallest-and-second-smallest-element-in-an-array/0
function findTwoSmallest(arr) {
  // 1<=n<=100
  let smallests = [101, 101];  // 1st smallest, 2nd smallest
  const res = arr.reduce((acc, num) => {
    if (num < acc[1] && num !== acc[0]) {
      if (num < acc[0]) {
        acc[1] = acc[0];
        acc[0] = num;
      } else {
        acc[1] = num;
      }
    }
    return acc;
  }, smallests);
  return res.find((num) => num > 100) ? [-1] : res;
}
const nums1 = [2,4,3,5,6];
const result1 = findTwoSmallest(nums1);
console.log(result1.join(',') === '2,3');
const nums2 = [1,2,1,3,6,7];
const result2 = findTwoSmallest(nums2);
console.log(result2.join(',') === '1,2');
const nums3 = [1,1];
const result3 = findTwoSmallest(nums3);
console.log(result3.join(',') === '-1');