fun_with_blocks.rb

require "ostruct"

class Bar
  attr_reader :num

  def initialize(num)
    @num = num
  end

  def zoo
    OpenStruct.new(cow: "moo_#{num}")
  end

  def dude
    OpenStruct.new(wheres_my_car?: "duuuuuuude")
  end
end

objs = (1..10).map{|n| Bar.new(n)}

class It
  attr_reader :array
  attr_reader :yielders

  def initialize(array = [], *yielders)
    @array    = array
    @yielders = yielders
  end

  def each(*args, &block)
    array.each do |obj|
      meths = yielders.map{|y|obj.send(y.to_sym)}
      yield meths
    end
  end
end

it = It.new(objs, :num, :zoo, :dude)

it.each do |num, zoo, dude|
  p num
  p zoo.cow
  p dude.wheres_my_car?
end