Sort array descending with max in middle

descending_sort_array.rb

def sort_descending(array)
  halves = array.each_slice((array.length) / 2).to_a
  first = halves[0].sort
  second = halves[1].sort.reverse

  first + second
end

array = [1, 2, 5, 4, 3, 6]
sort_descending(array)

p sort_descending(array) == [1, 2, 5, 6, 4, 3]