@Override
	public int hashCode() {
		return
			hash(_optimize,
			hash(_population,
			hash(_generation,
			hash(_totalGenerations,
			hash(_durations,
			hash(_killCount,
			hash(_invalidCount,
			hash(_alterCount))))))));
	}
Compare {@code this} evolution result with another one, according the
population's best individual.

@param other the other evolution result to compare
@return  a negative integer, zero, or a positive integer as this result
         is less than, equal to, or greater than the specified result.
jenetics/src/main/java/io/jenetics/engine/EvolutionResult.java