gistfile1.rb

class Array
  module ToProc
    def to_proc(*args)
      lambda do |*args|
        object = args.shift

        each { |message| object = object.__send__ message }

        object
      end
    end
  end

  include ToProc
end


### Usage example

Publisher = Struct.new(:name)
Book = Struct.new(:publisher)
Review = Struct.new(:book)

def build_publisher(name)
  Review.new(
             Book.new(
                      Publisher.new(name)
                      ))
end

reviews = [build_publisher('Publisher 1'), build_publisher('Publisher 2')]

p reviews.map(&[:book, :publisher, :name]) # => ["Publisher 1", "Publisher 2"]