From: li shoubo <lists@...>
Date: 2012-10-15T15:37:10+09:00
Subject: About define_method

I want to define a method in kernel using Flattern Scope.

  Kernel.send :define_method, :each_event do
    events.each_pair do |message, condition|
      yield message, condition
    end
  end

so, I think this is equal to:

def Kernel.each_event

    events.each_pair do |message, condition|
      yield message, condition
    end

end

Then I can pass a block to this method, for example:
Kernel.each_event do |message, condition|
  .....
end

However, if I use send define_method method to define each_event, I
would met a exception:
in `each_event': no block given (LocalJumpError)

I do not know why? if I do not use "send", the "yield" work well. Also,
I can define method as follows according to "meta programming ruby"
says:

  Kernel.send :define_method, :each_event do |&block|
    events.each_pair do |message, condition|
      block.call message, condition
    end
  end


please help me to figure out why I can not use the first solution.

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