From: Daniel Brockman <daniel@...>
Date: 2005-07-07T21:10:07+09:00
Subject: Re: Inheriting Array and slice() behaviour

"Robert Klemme" <bob.news@gmx.net> writes:

> class Module
>   def delegate(member, method)
>     class_eval "def #{method}(*a,&b) @#{member}.#{method}(*a,&b) end"
>   end
> end

[...]

>> class Foo
>>   def initialize() @s = "foo" end
>>
>>   delegate :s, :size
>> end

Maybe change that to not assume an instance variable and accept
multiple method names:

   class Module
     def delegate target, *methods
       for method in methods do
         module_eval %{def #{method} *a, &b
                         (#{target}).#{method} *a, &b end}
       end
     end
   end

   class Buffer
     delegate :@content, :size, :length
   end

That way you could do stuff like this:

   class Balancer
     delegate '@workers.random', :process
   end

(Sorry about the lack of a better example.)

-- 
Daniel Brockman <daniel@brockman.se>