second_largest.js

function getSecondLargest(arr) {
    let max = -Infinity, result = -Infinity;

  for (const value of arr) {
    const next_ele = Number(value)

    if (next_ele > max) {
      [result, max] = [max, next_ele] // save previous max
    } 
    else if (next_ele < max && next_ele > result)
    {
      result = next_ele; // new second biggest
    }
  }

  return result;
}