Implement Selection Sort in ruby

selection_sort.rb

# Algorithms: https://www.geeksforgeeks.org/selection-sort/

  def selection_sort(array)
    (array.length - 1).times do |i|
      min_index = i
      for j in (i + 1)...array.length
        min_index = j if array[min_index] > array[j]
      end

      array[min_index], array[i] = array[i], array[min_index] if min_index != i
    end
    array
  end

puts '------------------------------SELECTION SORT O(n^2)--------------------------'
print selection_sort([3,7,8,4,10,16,2,1,12])