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| class Hoge | |
| include Comparable | |
| attr_accessor :age | |
| def initialize(age) | |
| @age = age | |
| end | |
| def <=>(other) | |
| self.age <=> other.age | |
| end | |
| end | |
| list = [Hoge.new(20), Hoge.new(10), Hoge.new(15)] | |
| list.sort.each do |v| | |
| puts v.age | |
| end | |
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