Fetch Second Minimum Element from an Array without Sorting in JavaScript

We have an array of Numbers, and we are required to write a function that returns the second smallest value from the array.

For example − if the array is −

const arr = [67, 87, 56, 8, 56, 78, 54, 67, 98, 56, 54];

Then the output should be the following −

54

because 54 is the smallest value after 8

Example

const arr = [67, 87, 56, 8, 56, 78, 54, 67, 98, 56, 54];
const minimumIndex = arr => {
   return arr.indexOf(Math.min(...arr));
};
const secondMinimum = arr => {
   const copy = arr.slice();
   copy.splice(minimumIndex(copy), 1);
   return copy[minimumIndex(copy)];
};
console.log(secondMinimum(arr));

Output

The output in the console will be −

54