From: Dr Nic <drnicwilliams@...>
Date: 2006-07-25T20:31:55+09:00
Subject: Re: Defining a method with an argument with a default value

Oooh. And another cool use of class_eval is:

>> code = %q{ 
def bar(tar=0)
  tar * 2
end
}
=> " def bar(tar=0)\n  tar * 2\nend"
>> Foo.class_eval code
=> nil
Foo.new.bar 10
=> 20

So, this means you can take the text to eval against the class from 
anywhere. :)

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