gistfile1.rb

class Test
  attr_accessor :my_var
  
  def set_name(name)
    self.my_var = name    # You must do this using just my_var = name would
                          # create a local variable with the name my_var
  end
  
  def say_hello
    puts "Hi #{my_var}"   # No need to say `self`. It is the implicit receiver
                          # Call order looks like: local var? self.method? super...
  end
end