Class: Evolvable::Evaluation

Inherits:
Object
  • Object
show all
Defined in:
lib/evolvable/evaluation.rb

Overview

Examples:

# TODO: Show how to add/change population's evaluation object

# The goal value can also be assigned via as argument to `Evolvable::Population#evolve`
population.evolve(goal_value: 1000)

Constant Summary collapse

GOALS = 
{ maximize: Evolvable::Goal::Maximize.new,
minimize: Evolvable::Goal::Minimize.new,
equalize: Evolvable::Goal::Equalize.new }.freeze
DEFAULT_GOAL_TYPE = 
:maximize

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(goal = DEFAULT_GOAL_TYPE) ⇒ Evaluation

Returns a new instance of Evaluation.



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# File 'lib/evolvable/evaluation.rb', line 28

def initialize(goal = DEFAULT_GOAL_TYPE)
  @goal = normalize_goal(goal)
end

Instance Attribute Details

#goal ⇒ Object

Returns the value of attribute goal.



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# File 'lib/evolvable/evaluation.rb', line 32

def goal
  @goal
end

Instance Method Details

#best_evolvable(population) ⇒ Object 



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# File 'lib/evolvable/evaluation.rb', line 38

def best_evolvable(population)
  population.evolvables.max_by { |evolvable| goal.evaluate(evolvable) }
end

#call(population) ⇒ Object 



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# File 'lib/evolvable/evaluation.rb', line 34

def call(population)
  population.evolvables.sort_by! { |evolvable| goal.evaluate(evolvable) }
end

#met_goal?(population) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/evolvable/evaluation.rb', line 42

def met_goal?(population)
  goal.met?(population.evolvables.last)
end