Calculating Median in Ruby

Question

How do I calculate the median of an array of numbers using Ruby?

I am a beginner and am struggling with handling the cases of the array being of odd and even length.

Answer 1

Here is a solution that works on both even and odd length array and won't alter the array:

def median(array)   return nil if array.empty?   sorted = array.sort   len = sorted.length   (sorted[(len - 1) / 2] + sorted[len / 2]) / 2.0 end 

Answer 2

If by calculating Median you mean this

Then

a = [12,3,4,5,123,4,5,6,66] a.sort! elements = a.count center =  elements/2 elements.even? ? (a[center] + a[center+1])/2 : a[center]