Method: Species.marginal_dietary_requirement_fallback

Defined in:
lib/earth/pet/species.rb

.marginal_dietary_requirement_fallback ⇒ Object 



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# File 'lib/earth/pet/species.rb', line 47

def marginal_dietary_requirement_fallback
  total_diet_size = thoroughly_researched.map(&:weighted_diet_size).sum.to_f
  total_population = thoroughly_researched.sum(:population)
  return 0.0 unless total_population > 0.0
  average_weight = thoroughly_researched.weighted_average(:weight, :weighted_by => :population)
  return 0.0 unless average_weight > 0.0
  (total_diet_size / total_population) / average_weight
end