>  module Kernel
>    def with(object,&block)
>      object.instance_eval &block
>    end
>  end
> 
>  with([1,2,3]) { length } # => 3

This is really neat and compact. I love it. I think using eval that
much probably results in performance costs, but I'm definitely going
to add this to my .irbrc.

-- 
Giles Bowkett

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