TaskList.rb

class List
  attr_reader :all_tasks

  def initialize()
    @all_tasks = []
  end

  def add_task(task)
    @all_tasks << task.description
  end

  def show
    @all_tasks.each { |task| puts task }
  end
end

class Task
  attr_reader :description

  def initialize(description)
    @description = description
  end
end

my_list = List.new

task_1 = Task.new("Go shopping")
task_2 = Task.new("Do homework")
task_3 = Task.new("Get a job")

my_list.add_task(task_1)
my_list.add_task(task_2)
my_list.add_task(task_3)

my_list.show