#!/usr/bin/env ruby class MegaGreeter attr_accessor :names # Create the object def initialize(names ="World") @names = names end # Say hi to everybody def say_hi if @names.nil? puts "" else if @names.respond_to?("each") # @names is a list of some kind, iterate! @names.each do |name| puts "Hello #{name}!" end else puts "Hello #{@names}!" end end end # Say bye to everybody def say_bye if @names.nil? puts "" else if @names.respond_to?("join") # @join the list elements with commas puts "Goodbye #{@names.join(",")}. Come back soon!" else puts "Goodbye #{@names}!" end end end end if__FILE__== $0 mg = MegaGreeter.new mg.say_hi mg.say_bye #Change name to be "zeke" mg.names ="Jaylee" mg.say_hi mg.say_bye #Change the name an array of names mg.names = ["Albert", "Brenda", "Coderlee"] mg.say_hi mg.say_bye #Change to nil mg.names = nil mg.say_hi mg.say_bye end