From: Dhruva Sagar <dhruva.sagar@...>
Date: 2010-05-20T11:38:46+09:00
Subject: Re: define_method inside instance_eval

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Ok I reread your problem.

In your status_all method you can simply return a *args.to_a*. That should
be the simplest approach.

def status_field(*args)
 instance_eval { define_method(:status_all) {|*args| args.to_a } }
end

But I am not sure exactly why your taking this approach or what your
intentions are. What should be the behavior on subsequent calls to
status_field ?

On Thu, May 20, 2010 at 06:59, Adriano Nagel <anr@safira.com> wrote:

> Hi,
>
> I'm trying to create a class macro that, when called, defines a class
> method that returns the array passed to the class macro.
>
> For example, I'd have something like this in an included module:
>
> def status_field(*args)
>  instance_eval { define_method(:status_all) { args } }
> end
>
> (I've put a complete example at http://gist.github.com/407035).
>
> I was under the impression that methods created inside instance_eval
> would be defined inside the singleton class, but apparently
> define_method seems to ignore that (why?).
>
> So I used the string form of instance_eval and produced this eyesore:
>
> instance_eval %{
>  def status_all
>    "#{args.join(' ')}".split
>  end
> }
>
> I must be missing something. Any hints on how to solve this problem
> properly? I'd also like to avoid using eval on strings.
>
> Thanks!
>
> --
> Adriano
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 

Thanks & Regards,
Dhruva Sagar.

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