From: "FireAphis@..." <FireAphis@...>
Date: 2007-07-25T16:19:58+09:00
Subject: Re: Regarding Constants

On Jul 24, 11:21 pm, Harnish Botadra <harnish_...@yahoo.com> wrote:
> Hi,
>
> I am having some difficulty in the use of constants in Ruby.  I've a
> module:
>
> eg.
> -------------------
> Module Constants
>
> MY_CONST = "hello"
>
> end
> -------------------
>
> I include this module in my model.  Further, the name of the constant
> (MY_CONST) would be passed in a variable say 'var'.  My question, is how
> do I access the value of the constant from the constant name in 'var'?
>
> Something like, :: + "{#var}" or similar?  Any help greatly appreciated.
> Thanks.
>
> Regards,
> Harnish
> --
> Posted viahttp://www.ruby-forum.com/.

If I understand you correctly then:

Module Constants
    MY_CONST = "hello"
end

def get_constant_value_by_name(var)
   Constants.const_get(var)
end

get_constant_value_by_name("MY_CONST")
=> "hello"

Hope this helps,
FireAphis