Ruby Modules

ruby_modules.rb

# Modules are similar to classes but they can't create new instances
# nor can they have subclasses. They are used to store things such as
# methods and constants until we need them. 
# Modules let classes "inherit" behaviors as needed also known as mixins

module Code
  # Constants can be defined in modules in ALL CAPS with _ for multiple words 
  CURRENT_JOB = "programmer"
  
  def code
    # #{@name} is allowing me to display @name's attribute. If it was just @name, the puts
    # method would return @name as a string, not the attribute of @name
    # "Because @name is a programmer, @name is coding."
    
    puts "Because #{@name} is a #{CURRENT_JOB}, #{@name} is coding."
  end
end

class Person
  # the include Code allows the class Person to have access to the module Code
  include Code
  def initialize(name) 
    @name = name
  end
end

# Creating a new instance of Person
sung = Person.new("Sung")
sung.code
# Returns
"Because Sung is a programmer, Sung is coding."