bitwise-median.js

let values = [2, 56, 3, 41, 0, 4, 100, 23];
values.sort((a, b) => a - b);
let median = (values[(values.length - 1) >> 1] + values[values.length >> 1]) / 2
// median = 13,5

/*for finding average you can combine map and reduce at the same time:
*/
let avg = values.map((c, i, arr) => c / arr.length).reduce((p, c) => c + p);
/*
Also median for even number of elements should be sum of two middle numbers divided by 2. So in this case median should be (4 + 23) / 2 = 13.5 and not 23.

Here is the logic for calculation median:
*/
function median(arr) {
  arr.sort((a, b) => a - b);
  var pivot = Math.floor(arr.length / 2);
  return arr.length % 2 ? arr[pivot] : (arr[pivot - 1] + arr[pivot]) / 2;
}