lib/timespan/compare.rb in timespan-0.2.1 vs lib/timespan/compare.rb in timespan-0.2.2

@@ -47,13 +47,15 @@
       end
     end
 
     def +(other)
       self.duration += Duration.new(other)
+      self
     end
 
     def -(other)
       self.duration -= Duration.new(other)
+      self
     end
 
 
     def valid_compare? time
       valid_compare_types.any? {|type| time.kind_of? type }
\ No newline at end of file