Median
JavaScript, Math · Oct 22, 2020
Calculates the median of an array of numbers.
- Find the middle of the array, use
Array.prototype.sort()to sort the values. - Return the number at the midpoint if
Array.prototype.lengthis odd, otherwise the average of the two middle numbers.
const median = arr => {
const mid = Math.floor(arr.length / 2),
nums = [...arr].sort((a, b) => a - b);
return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
};median([5, 6, 50, 1, -5]); // 5
