1
2
3
4
5
6
7
8
9
10
11
12
13
14

# Creates a selector using tournament selection
  def EvolutionaryAlgorithm.make_tournament_selector(tournamentSize, getFitness)
    return Proc.new { |pop, count|
      newPop = []

      while newPop.length < count do
        pool = pop.random_elements(tournamentSize)
        fitnesses = pool.collect { |i| getFitness.call(i) }
        newPop.push(pool[fitnesses.max_index()])
      end

      newPop
    }
  end