Ruby 的 YAML 对象序列化

ysitbook

1. require 'yaml'
   
2. class Special
   
3.     def initialize(valuable, volatile, precious)
   
4.         @valuable = valuable
   
5.         @volatile = volatile
   
6.         @precious = precious
   
7.     end
   
8. 
   
9.     def to_yaml_properties
   
10.         %w{ @precious @valuable }
    
11.     end
    
12.     def to_s
    
13.         "#@valuable #@volatile #@precious"
    
14.     end
    
15. end
    
16. 
    
17. obj = Special.new("Hello", "there", "World")
    
18. puts "Before: obj = #{obj}"
    
19. data = YAML.dump(obj)
    
20. obj = YAML.load(data)
    
21. puts "After: obj = #{obj}"
    
22. 
    
23. obj = Special.new("Hello", "there", "World")
    
24. puts YAML.dump(obj)

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