strategy_pattern_3.rb

class Report
  def initialize
    @strategy = {}
    @strategy[Number] = NumberStrategy.new
    @strategy[String] = StringStrategy.new
    @strategy[SomethingElse] = SomethingElseStrategy.new
  end
  
  def generate
    @data = extract_data
    @strategy[@data].run
    present_results
  end
end