Essential Books

Catching calls to an undefined method

suggest change 
class Animal
  def method_missing(method, *args, &block)
    "Cannot call #{method} on Animal"
  end
end

=> Animal.new.say_moo 
> "Cannot call say_moo on Animal"
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Method missing:
* method missing
* Catching calls to an undefined method
* Use with block
* Use with parameter
* Using the missing method
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