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* lib/observer.rb: [DOC] Clarify default observer method.

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By @edward [Fixes GH-450] https://github.com/ruby/ruby/pull/450


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43743 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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zzak 2013-11-21 04:44:45 +00:00
parent 1d8d8ff57f
commit f67be32291
2 changed files with 9 additions and 3 deletions
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7
lib/observer.rb
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@ -15,13 +15,14 @@
# module, which provides the methods for managing the associated observer
# objects.
#
# The observers must implement a method called +update+ to receive
# notifications.
#
# The observable object must:
# * assert that it has +#changed+
# * call +#notify_observers+
#
# An observer subscribes to updates using Observable#add_observer, which also
# specifies the method called via #notify_observers. The default method for
# #notify_observers is #update.
#
# === Example
#
# The following example demonstrates this nicely. A +Ticker+, when run,