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require 'yaml'
class Special
def initialize(valuable, volatile, precious)
@valuable = valuable
@volatile = volatile
@precious = precious
end
def to_yaml_properties
%w{ @precious @valuable }
end
def to_s
"#@valuable #@volatile #@precious"
end
end
obj = Special.new("Hello", "there", "World")
puts "Before: obj = #{obj}"
data = YAML.dump(obj)
obj = YAML.load(data)
puts "After: obj = #{obj}"
obj = Special.new("Hello", "there", "World")
puts YAML.dump(obj)
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