Class: ForgetTable::Decay

Inherits:
Object
  • Object
show all
Defined in:
lib/forget_table/decay.rb

Constant Summary collapse

DEFAULT_DECAY_RATE = 
0.2

Instance Method Summary collapse

Constructor Details

#initialize(last_updated, rate = DEFAULT_DECAY_RATE) ⇒ Decay

  • last_updated: timestamp of the last update

  • rate: the rate of the decay (optional)



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# File 'lib/forget_table/decay.rb', line 9

def initialize(last_updated, rate = DEFAULT_DECAY_RATE)
  @last_updated = last_updated
  @rate = rate
end

Instance Method Details

#decay_value(value) ⇒ Object 



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# File 'lib/forget_table/decay.rb', line 14

def decay_value(value)
  decayed_value = value - decay_for(value)
  decayed_value > 0 ? decayed_value : 1
end