Question

我知道这是一个愚蠢的问题，它可能很容易，但我正盯着屏幕看起来像3个小时，我似乎仍然无法弄明白。知道如何缩短这段代码吗？我的班级Car.cs中有public enum Type和public enum Size。

        Car car1 = new Car((CarType)0, (Size)0);
        Car car2 = new Car((CarType)0, (Size)1);
        Car car3 = new Car((CarType)0, (Size)2);
        Car car4 = new Car((CarType)1, (Size)0);
        Car car5 = new Car((CarType)1, (Size)1);
        Car car6 = new Car((CarType)1, (Size)2);
        Car car7 = new Car((CarType)2, (Size)0);
        Car car8 = new Car((CarType)2, (Size)1);
        Car car9 = new Car((CarType)2, (Size)2);

编辑：我用这样的方法打印它们

        Group1Print(car1, car2, car3);
        Group2Print(car4, car5, car6);
        Group3Print(car7, car8, car9);

Answer 1

试试这个：

        var cars = new List<Car>();
        foreach (Type type in Enum.GetValues(typeof(Type)))
        {
            foreach (Size size in Enum.GetValues(typeof(Size)))
            {
                cars.Add(new Car() {Size = size, Type = type});
            }
        }

或LINQ版本：

var cars = (from Type type in Enum.GetValues(typeof(Type))
            from Size size in Enum.GetValues(typeof(Size))
            select new Car() {Size = size, Type = type}).ToList();

Answer 2

var cars = Enumerable.Range(0, 9)
                     .Select(i => new Car((Type)(i / 3), (Size)(i % 3)))
                     .ToArray();

Answer 3

我尝试过这样的事情。似乎是一个有效的答案。谢谢你的帮助。

// Low level datalink class
class RS485
{
public:
    void send(const char *data) {
        // datalink function to send data using RS485
        printf("RS485: %s \n", data);
    }
};

class I2C
{
public:
    void send(const char *data) {
        // datalink function to send data using I2C
        printf("I2C: %s \n", data);
    }
};

class BT
{
public:
    void send(const char *data) {
        // datalink function to send data using Bluetooth
        printf("BT %s \n", data);
    }
};

// Protocol class
template<typename Comm>
class MODBUS
{
public:
    MODBUS(Comm *c) { _c = c; }

    void send(const char *data) {
        printf("MODBUS\n");
        _c->send(data);
    }
private:
    Comm *_c;
};

// Protocol class
template<typename Comm>
class TCP
{
public:
    TCP(Comm *c) { _c = c; }

    void send(const char *data) {
        printf("TCP\n");
        _c->send(data);
    }
private:
    Comm *_c;
};

int main() {
    // Modbus over I2C
    I2C *i2c = new I2C();
    MODBUS<I2C> *mb_i2c = new MODBUS<I2C>(i2c);
    mb_i2c->send("Data ...");

    // Modbus over RS485
    RS485 *rs = new RS485();
    MODBUS<RS485> *mb_rs = new MODBUS<RS485>(rs);
    mb_rs->send("Data ...");

    // Tcp over Modbus over RS485
    TCP< MODBUS<RS485> > *tcp_modbus_rs = new TCP< MODBUS<RS485> >(mb_rs);
    tcp_modbus_rs->send("Data ...");

    return 0;
}

如何缩短这个新的目标代码？

3 个答案: