Excluding extreme elements from average calculation in JavaScript

We are required to write a JavaScript function that takes in an array of Number. Then the function should return the average of its elements excluding the smallest and largest Number.

Example

The code for this will be −

const arr = [5, 3, 5, 6, 12, 5, 65, 3, 2];
const findExcludedAverage = arr => {
   const creds = arr.reduce((acc, val) => {
      let { min, max, sum } = acc;
      sum += val;
      if(val > max){
         max = val;
      };
      if(val < min){
         min = val;
      };
      return { min, max, sum };
   }, {
      min: Infinity,
      max: -Infinity,
      sum: 0
   });
   const { max, min, sum } = creds;
   return (sum - min - max) / (arr.length / 2);
};
console.log(findExcludedAverage(arr));

Output

The output in the console −

8.666666666666666