gistfile1.rb

  def javascript_class_type value
    class_of = lambda { |klass| value.kind_of?(klass) }
    case
      when class_of.call(String)
        return "string"
      when class_of.call(Fixnum), class_of.call(Float)
        return "number"
      when class_of.call(FalseClass), class_of.call(TrueClass)
        return "boolean"
      when class_of.call(Array)
        return "Array/#{self.javascript_class_type(value[0])}"
      else
        raise "Unsupported parameter type #{value.class}"
    end
  end