From: Joe Van Dyk <joevandyk@...>
Date: 2005-02-04T04:51:29+09:00
Subject: Re: method_missing question

On Thu, 3 Feb 2005 11:32:53 -0800, Joe Van Dyk <joevandyk@gmail.com> wrote:
> Can someone complete the psuedo-code in SomeObject#method_missing for
> me?  Or suggest a better way of doing this?  The attributes for
> SomeObject are, in my application, are generated from a configuration
> file.
> 
> Thanks
> Joe
> 
> class SomeObject
>     def initialize
>         @attributes = { :x_pos => 20, :y_pos => 30, :z_pos => 40 }
>     end
> 
>     def method_missing(method, *args)
>         # test to see if this is a get or set method
>         if method contains an =
>             set(method minus the equal, args)
>         else
>             get(method)
>         end
>     end

Here's what I have so far.  This works, but wondering if something
better's out there.

    def method_missing(method, *args)
        puts "method missing called with #{method} and #{args}"
        
        if method.to_s =~ /^(.+)=$/
            set($1.to_sym, *args)
        else
            get(method.to_sym)
        end
    end

> 
>     def get(attribute)
>         @attributes[attribute]
>     end
> 
>     def set(attribute, value)
>         @attributes[attribute] = value
>     end
> end
> 
> my_obj = SomeObject.new
> my_obj.x_pos = 20
> my_obj.z_pos = 40
> 
> assert(20, my_obj.x_pos)
> assert(40, my_obj.z_pos)
>