Gustavo Toro gtoroap

## array_flatten.rb
class ArrayFlatten
  def initialize(arr)
    @arr = arr
  end

  def flatten(level = nil)
    _flatten(@arr, 0, level)
  end

  private
	class ArrayFlatten
	def initialize(arr)
	@arr = arr
	end

	def flatten(level = nil)
	_flatten(@arr, 0, level)
	end

	private