observable.rb in openwferu-0.9.12.863

- old
+ new

@@ -28,12 +28,10 @@
 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 # POSSIBILITY OF SUCH DAMAGE.
 #++
 #
-# $Id: definitions.rb 2725 2006-06-02 13:26:32Z jmettraux $
-#
 
 #
 # "made in Japan"
 #
 # John Mettraux at openwfe.org
@@ -53,12 +51,16 @@
         # Observers will register themselves to the Observable via
         # this method.
         #
         # An observer is an instance which responds to call(channel, *args)
         #
+        # Returns the observer object (or the block's Proc object), could
+        # be useful when removing the observer.
+        #
         def add_observer (channel, observer=nil, &callback)
             observer = callback unless observer
             (@observers[channel] ||= []) << observer
+            observer
         end
 
         #
         # Removes an observer (this obviously doesn't work well when 
         # the actual observer is a block).