úÎ" S     "`Type class for pretty printing an entity instead of just using the default show implementation. Show an entity. ,Scored generation (population and archive). A possibly scored entity. =Type class for entities that represent a candidate solution. Three parameters: + data structure representing an entity (a) : data used to score an entity, e.g. a list of numbers (b) P some kind of pool used to generate random entities, e.g. a Hoogle database (c) Generate a random entity. <Crossover operator: combine two entities into a new entity. 7Mutation operator: mutate an entity into a new entity. #Score an entity (lower is better). %Configuration for genetic algorithm.  population size 'size of archive (best entities so far) (maximum number of generations to evolve ;fraction of entities generated by crossover (tip: >= 0.80) 1fraction of entities generated by mutation (tip: <= 0.20) Hparameter for crossover (semantics depend on actual crossover operator) Fparameter for mutation (semantics depend on actual mutation operator) enable/)disable built-in checkpointing mechanism Enable/'disable debugging output (hard coded). <Return value with debugging output if debugging is enabled. (Currify a list of elements into tuples. 3Take and drop elements of a list in a single pass. Show a scored entity.  Show a list of scored entities. )Initialize: generate initial population. Score an entity (if it hasn't been already). &Binary tournament selection operator. -Function to perform a single evolution step:  score all entities # combine with best entities so far  sort by fitness & create new population using crossover/ mutation #Generate file name for checkpoint. cTry to restore from checkpoint: first checkpoint for which a checkpoint file is found is restored.  Checkpoint a single generation. !>Evolution: evaluate generation, (maybe) checkpoint, continue. Do the evolution!      "       !"#GA-0.1GA ShowEntity showEntityEntity genRandom crossovermutationscoreGAConfigpopSize archiveSizemaxGenerations crossoverRate mutationRatecrossoverParam mutationParamwithCheckpointingevolve ScoredGen ScoredEntitydebugdbgcurrify takeAndDropshowScoredEntityshowScoredEntitiesinitPopscoreEnttournamentSelection evolutionStep chkptFileNamerestoreFromCheckpoint checkpointGen evolution