Module: RubyExt::Observable

Defined in:
lib/ruby_ext/more/observable.rb

Instance Method Summary collapse

Instance Method Details

#add_observer(observer) ⇒ Object 



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# File 'lib/ruby_ext/more/observable.rb', line 2

def add_observer observer
  @observable_observers ||= []
  @observable_observers << observer unless @observable_observers.include? observer
end

#delete_observer(observer) ⇒ Object 



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# File 'lib/ruby_ext/more/observable.rb', line 12

def delete_observer observer
  @observable_observers.delete observer if @observable_observers
end

#delete_observers ⇒ Object 



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# File 'lib/ruby_ext/more/observable.rb', line 16

def delete_observers
  @observable_observers.clear if @observable_observers
end

#notify_observers(method, *args) ⇒ Object 



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# File 'lib/ruby_ext/more/observable.rb', line 7

def notify_observers method, *args
  raise "Invalid usage, method must be Symbol or String!" unless method.is_a?(Symbol) or method.is_a?(String)
  @observable_observers.each{|observer| observer.respond_to method, *args} if @observable_observers
end

#observers_count ⇒ Object 



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# File 'lib/ruby_ext/more/observable.rb', line 20

def observers_count
  @observable_observers ? @observable_observers.size : 0
end