Class: AllMyCircuits::Strategies::AbstractWindowStrategy::Window

Inherits:
Object
  • Object
show all
Defined in:
lib/all_my_circuits/strategies/abstract_window_strategy/window.rb

Instance Method Summary collapse

Constructor Details

#initialize(number_of_events) ⇒ Window

Returns a new instance of Window.



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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 6

def initialize(number_of_events)
  number_of_events = Integer(number_of_events)
  unless number_of_events > 0
    raise ArgumentError, "window size must be a natural number"
  end
  @number_of_events = number_of_events
  reset!
end

Instance Method Details

#<<(event) ⇒ Object 



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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 20

def <<(event)
  if full?
    event_to_decrement = @window.shift
    @counters[event_to_decrement] -= 1
  end
  @window.push(event)
  @counters[event] += 1
  self
end

#count(event = nil) ⇒ Object 



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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 30

def count(event = nil)
  event.nil? ? @window.length : @counters[event]
end

#full? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 34

def full?
  @window.length == @number_of_events
end

#inspect ⇒ Object 



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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 38

def inspect
  "#<%s:0x%x size: %d, counts: %s, full: %s" % [self.class.name, object_id, @number_of_events, @counters, full?]
end

#reset! ⇒ Object 



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# File 'lib/all_my_circuits/strategies/abstract_window_strategy/window.rb', line 15

def reset!
  @window = []
  @counters = Hash.new { |h, k| h[k] = 0 }
end