Find the median of an array

Question

I wrote some code that returns the median of an unsorted odd numbered array, but it does not return the median of an even numbered array.

I know that in order to find

Answer 1

Here is the answer:

def get_median(sub_a)
    result = -1
    size = sub_a.size
    if size == 0
        result = 0
    elsif size == 1
        result = sub_a[0]
    elsif size == 2
        result = get_average(sub_a[0], sub_a[1])
    else
        sorted_a = sub_a.sort
        index = size / 2
        if size % 2 == 0
            result = get_average(sorted_a[index - 1], sorted_a[index]);
        else 
            result = sorted_a[index];
        end
    end

    '%0.01f' % result
end