From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-03-21T07:24:40+09:00
Subject: Re: Delcaring a foo[] method

Alex Wayne wrote:
> I am trying to define a method that you call like this:
>
>   @obj.foo[123]

That's two method calls: it calls foo() on @obj and then [](123) on the result 
of foo(). So you need to define foo to return something that responds to []. 
Like this:

def foo()
  Object.new.instance_eval do
    def [](value)
      value*2
    end
    self
  end
end

foo
#=> #<Object:0x2b47ef9898a8>

foo[6]
#=> 12


HTH,
Sebastian
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