lib/timespan/compare.rb in timespan-0.2.0 vs lib/timespan/compare.rb in timespan-0.2.1

@@ -17,11 +17,10 @@
       self.new duration, :reverse => true
     end
   end
 
   module Compare
-
   	include Comparable
 
     def time_left time = nil
       time_compare = time || Time.now
       diff = end_time - time_compare
@@ -45,9 +44,18 @@
       	seconds <=> time
       when ActiveSupport::Duration
         seconds <=> time.to_i
       end
     end
+
+    def +(other)
+      self.duration += Duration.new(other)
+    end
+
+    def -(other)
+      self.duration -= Duration.new(other)
+    end
+
 
     def valid_compare? time
       valid_compare_types.any? {|type| time.kind_of? type }
     end
 
\ No newline at end of file