From: Eric Hodel <drbrain@...7.net>
Date: 2005-05-18T02:04:52+09:00
Subject: Re: Forwardable, reworked

On 17 May 2005, at 04:36, Daniel Berger wrote:

> --- Robert McGovern <robert.mcgovern@gmail.com> wrote:
>
>>> class Foo
>>>    extend Forwardable
>>>
>>>    delegate :to_i => :@number
>>>    delegate [:to_s, :reverse] => :@string
>>>
>>>    def initialize
>>>      @number = 5
>>>      @string = "foobar"
>>>    end
>>> end
>
> This should do the trick:
>
> def delegate(hash)
>    hash.each{ |methods, accessor|
>       methods = methods.to_s if methods.kind_of?(Symbol)
>       methods.each{ |method|
>          def_instance_delegator(accessor, method)
>       }
>    }
> end

I think I would rather see:

delegate :@number, :to_i
delegate :@string, :to_s, :reverse

def delegate(ivar, *methods)
   methods.each { |method| def_instance_delegator ivar, method }
end

The kind_of? feels so clumsy.  (And I forgot how String#each worked  
since I never use it.)

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
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