> $ irb                                                                                                                                                                 [±master ●●]
r>> require 'json'
=> true
>> class Magic
>> attr_accessor :magic
>> def initialize
>> @magic = "magic"
>> end
>> end
=> :initialize
>> magic = Magic.new
=> #<Magic:0x00000000f910c8 @magic="magic">
>> p magic
#<Magic:0x00000000f910c8 @magic="magic">
=> #<Magic:0x00000000f910c8 @magic="magic">
>> JSON.dump magic
=> ""#<Magic:0x00000000f910c8>""
>>