gaOperator.rb

crossover = -> parents, position {
  [] << parents[0].take(position) + parents[1].drop(position) <<
      parents[1].take(position) + parents[0].drop(position) }

mutate = -> individual, position, genotypeDefinition {
  individual[position] = genotypeDefinition.curry(1)
  individual.flatten }

selection = -> population {
  (population + population).sort_by{ |n| -fitness[n]}.take(population.length) }