Class: Wallace::Fitness::RawFitness

Inherits:
Wallace::Fitness show all
Defined in:
lib/fitness/raw_fitness.rb

Overview

The raw fitness model uses a single numeric type to describe the fitness of a given individual. Ordering of fitnesses, and thus of individuals, is achieved via ordering on these simple numeric types.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ RawFitness

Constructs a new raw fitness.

Parameters:

  • value, the raw fitness value.



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# File 'lib/fitness/raw_fitness.rb', line 13

def initialize(value)
  @value = value
end

Instance Attribute Details

#value ⇒ Object (readonly)

Allow the fitness value to be read but not changed.



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# File 'lib/fitness/raw_fitness.rb', line 7

def value
  @value
end

Instance Method Details

#<=>(other) ⇒ Object

Compares this raw fitness to another.

Parameters:

  • other, the fitness to compare against.

Warning: It is assumed that a RawFitness object is provided for comparison.



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# File 'lib/fitness/raw_fitness.rb', line 24

def <=>(other)
  return -1 if other.value.is_a? Float and other.value.nan?
  return 1 if @value.is_a? Float and @value.nan?
  return @value <=> other.value
end