From: Logan Capaldo <logancapaldo@...>
Date: 2006-06-12T13:19:23+09:00
Subject: Re: Something  inconsistent in ruby syntax??


On Jun 11, 2006, at 11:10 PM, uncutstone wu wrote:

> hello1 and hello2 are instance methods.
> hello3 is  a class method.
> hello4 is a instance method.
>
> Why hello1 and hello2 are same, but hello3 and hello4 are different?
>
> It seems a little inconsistent . Somebody can give a clear  
> explanation?
> Thanks in advance.
>
> uncutstone

hello1, hello2, and hello4 are all equivalent. They are the same  
thing as writing

class A
  def hello1
  ...
  end

  def hello2
  ...
  end

  def hello4
  ...
  end
end

For hello3 you've done the equivalent of

class A
   def self.hello3
     ...
   end
end

The reason doesn't happen with hello1 is

instance_eval { # self is MailTruck in this block
   define_method(...) { ... } # this is like self.define_method(...)  
{ ... }
                              # since define_method is a method,
                              # which is the same as define_method  
outside of the instance_eval in this case