Module: GladiatorialSelection

Defined in:
lib/charlie/selection.rb

Overview

Co-evolution: Direct competition (gladiatorial) selection. Define a Genotype#fight function to use this

Instance Method Summary collapse

Instance Method Details

#next_generation(population) ⇒ Object 



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# File 'lib/charlie/selection.rb', line 172

def next_generation(population)
  (population.size/2).times{
    ix=[0,0,0,0]
    ix=(0..3).map{population.rand_index} while ix.uniq.size < 4
    ix[0],ix[1] = ix[1],ix[0] unless population[ix[0]].fight(population[ix[1]])  # 0 and 2 hold winners
    ix[2],ix[3] = ix[3],ix[2] unless population[ix[2]].fight(population[ix[3]])
    nw = []; 
    nw +=  yield(population[ix[0]],population[ix[2]]) while nw.size < 2
    population[ix[1]],population[ix[3]] = *nw
  }
  population
end