poller_concept.rb

require 'pry'

class Read
  def initialize value = 0
    @value = value
  end
  
  def to_s
    "#{@value}:Read"
  end
end

class Write
  def initialize value = 0
    @value = value
  end
  
  def to_s
    "#{@value}:Write"
  end
end


i = [Read.new(1), Read.new(2), Write.new(3), Read.new(4), Write.new(5)]

def action items, read_proc, write_proc
  items.each do |i|
    read_proc.call  i if i.is_a? Read
    write_proc.call i if i.is_a? Write
  end
end

r = Proc.new do |item|
  puts "Reader proc: #{item}"
end

w = Proc.new do |item|
  puts "Writer proc: #{item}"
end

action i, r, w

# binding.pry