Swap Population Creation and Challenger Selection in run()

[big-c-note]

https://github.com/mithi/rusty-genes/blob/rusty-genes/citydna/src/simulation.rs

        assert!(skip > 0, "skip must be 1 or larger");

        let mut population = random_population(self.population_size, &self.cities);
        let mut champion = find_fittest(&population);

        for i in 0..self.iterations {

            let challenger = find_fittest(&population);
            population = self.generate_population(population);
            debug_print(debug_level, skip, i + 1, &population, &champion, &challenger, self.number_of_cities);

            if champion.fitness <= challenger.fitness {
                champion = challenger;
            }
        }

        self.fitness = champion.fitness;
        self.dna = champion.dna;

        if debug_level >= 2 { self.print(); }
    }

You may want to swap let challenger = find_fittest(&population); and population = self.generate_population(population);

In that way you are getting the challenger from the newest generated population. As written, in the last iteration, you would be looking at the challenger from the previous iteration.

[big-c-note]

And, thank you for the helpful example in rust!

[mithi]

cool. sure ill do that. or if you'd like to open a pull request yourself, ill gladly merge it 😀

[big-c-note]

Of course, PR: #7