descriptive method calls

gistfile1.rb

class Person

  attr_accessor :name, :role

  def initialize(name, role)
    @name, @role = name, role
  end

  # options is a Hash with the following keys
  # :to -> the role to set to
  # :if -> a Symbol. This method will be called and must return true in order to set the role
  def set_role(options)
    raise ArgumentError.new('Must specify :to and :if') unless options.slice(:to,:if).count < 2
    cond = self.send(options[:if]) if options[:if].class == Symbol
    @role = options[:to] if cond
  end


end
    

p = Person.new("svs",:inside_subscriber)
p.set_role(:to => :outside_subscriber, :if => :all_access_revoked?)