Question

How to find the second largest elements in an array with Node.js

Answer 1

let getTheSecondlargest = function (arr) { 
  let max = -Infinity, secondmax = -Infinity;
 
  for (const n of arr) {
        if (n > max) {
            [secondmax, max] = [max, n] 
        } else if (n < max && n > secondmax) {
                secondmax = n; 
        }
  }
   
  return secondmax;
}
 
const arr = [34, 3, 8, 2, 9, 4, 6];
console.log(getTheSecondlargest(arr));
 
const arr1 = [1, 1, 2, 1, 1];
console.log(getTheSecondlargest(arr1));
 
const arr2 = [5, 5, 5, 5, 5, 5, 5];
console.log(getTheSecondlargest(arr2));
 
   
     
     
/*
run:
     
9
1
-Infinity
     
*/

 

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