Evolving

gistfile1.js

    evolveWeight: function () {
        var step = 0.01;

        var index_to_decrease = Enemy.TypeWeight.indexOf(getBiasedRandomItem(Enemy.TypeWeight, Enemy.TypeWeight));
        var min = Math.min.apply(Math, Enemy.TypeWeight);
        var index_to_increase = Enemy.TypeWeight.indexOf(min);

        Enemy.TypeWeight[index_to_increase] += step;
        Enemy.TypeWeight[index_to_decrease] -= step;
        cc.log("Weight: " + Enemy.TypeWeight);
    }