What does this Ruby snippet output?

1class Temp
2  include Comparable
3  attr_reader :degrees
4  def initialize(d) = @degrees = d
5  def <=>(other) = degrees <=> other.degrees
6end
7temps = [Temp.new(30), Temp.new(15), Temp.new(22)]
8sorted = temps.sort
9puts sorted.map(&:degrees).inspect