/**

* @function calculateMedian

* @description This function will find the median value of an array of numbers.

* @param {number[]} numbers Sorted array of numeric values.

* @return {number} The median of input numbers.

* @see https://en.wikipedia.org/wiki/Median

* @example calculateMedian([1, 2, 4, 5, 8]) = 4

* @example calculateMedian([1, 2, 4, 5]) = 3

*/

export const calculateMedian = (numbers: number[]): number => {

if (numbers.length < 1) {

throw new TypeError('Input array must contain at least one number.')

}

const totalNumbers = numbers.length

if (totalNumbers % 2 === 0) {

const index = totalNumbers / 2

return (numbers[index - 1] + numbers[index]) / 2

} else {

const index = (totalNumbers + 1) / 2

return numbers[index - 1]

}

}