From: Mark Haliday <markhaliday@...>
Date: 2005-11-22T04:21:05+09:00
Subject: Problem with Pickaxe and Yaml

I've got the Pickaxe book (2nd edition) and was doing some of the Yaml 
code on page 417.  I cannot seem to get the expected results.

Example:

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")
data = YAML.dump(obj)
obj = YAML.load(data)

puts obj["valuable"]

The last line throws an error, shouldn't it print out the value for 
"valuable"?

I also tried this for the last line:

puts data["valuable"]

Thanks for any help on this.

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