functional-ruby Option extension

option.rb

module Functional
  class Option
    def map(fn)
      if some?
        self.class.some(fn.call(value))
      else
        self.class.none(reason)
      end
    end

    def self.flatten(result)
      if result.some?
        result.value # which is an Option obj
      else
        none result.reason
      end
    end

    def >=(fn)
      self.class.flatten(map(fn))
    end
  end
end