AttributeMethods refector suffix method added some usages

railties/guides/source/active_model_basics.textile

@@ -30,12 +30,23 @@ private
   end
 
   def attribute_highest?(attribute)
-    attribute > 100 ? true : false
+    send(attribute) > 100 ? true : false
   end
   
 end
+
+person = Person.new
+person.age = 110
+person.age_highest?  # true
+person.reset_age     # 0
+person.age_highest?  # false 
+
 </ruby>
 
+h4. Callbacks
+
+
+
 h3. Changelog
 
 * August 5, 2011: Initial version by "Arun Agrawal":http://github.com/arunagw