From: HarryO <harryo@...>
Date: 2001-11-17T04:48:54+09:00
Subject: [ruby-talk:25630] Re: Creating methods on the fly

Can someone explain why the following code fails to define the new method
jim() in class Mary?  Can you suggest how it can be done?  When I run
this, I get an error saying there's no method "jim" in that class.

def fred(object)
    name = "jim"
 
    class << object
        eval %{
            puts "Creating method #{name}() ..."
 
            def #{name}(*arguments)
                puts "jim() -- hello there!"
            end
        }
    end
end
 

class Mary
    def initialize
    end
 
end
 
fred(Mary)
 
m = Mary.new
 
m.jim()