Method: Concurrent::Concern::Observable#add_observer

Defined in:

lib/concurrent-ruby/concurrent/concern/observable.rb

#add_observer(observer = nil, func = :update, &block) ⇒ Object

Adds an observer to this set. If a block is passed, the observer will be created by this method and no other params should be passed.

Parameters:

• observer (Object) (defaults to: nil) —

  the observer to add

• func (Symbol) (defaults to: :update) —

  the function to call on the observer during notification. Default is :update

Returns:

• (Object) —

  the added observer

# File 'lib/concurrent-ruby/concurrent/concern/observable.rb', line 61

def add_observer(observer = nil, func = :update, &block)
  observers.add_observer(observer, func, &block)
end