zgfif

module ActsAsWalker
  attr_reader :distance

  def walk!
    @distance += 1
  end
end

module ActsAsSpeaker
  attr_reader :speak, :gills

zgfif

require 'active_model'

class Superhero
  include ActiveModel::Validations

  attr_accessor :name, :age

  def initialize **args
    @name = args[:name]

zgfif

require 'active_model'

class Superhero
  include ActiveModel::Validations
  @@total = []

  attr_reader :name, :age

  def initialize name, age
    @name = name