价格匹配算法是否使用 LINQ

Question

我有一个 JSON 输入结构是这样的

"Levels": [
                    {
                        "Name": "3 - 50 Points",
                        "UnitPrice": 855,
                        "MinValue": 0,
                        "MaxValue": 51
                    },
                    {
                        "Name": "51 - 100 Points",
                        "UnitPrice": 800,
                        "MinValue": 51,
                        "MaxValue": 100
                    },
                   {
                        "Name": "100- 150 Points",
                        "UnitPrice": 544,
                        "MinValue": 100,
                        "MaxValue": 150
                    },
                    {
                        "Name": "150 Points",
                        "UnitPrice": 504,
                        "MinValue": 150,
                        "MaxValue": -1
                    }
                ]

我有一个 class: -

public class Level {
        public string Name { get; set; }

        public decimal UnitPrice { get; set; }

        public int MinValue { get; set; }

        public int MaxValue { get; set; }
}

现在我的objective是根据代码注释的方法中的示例解释的算法来计算发生的成本

public decimal GetCostOccured (int quantity, int minmaxflag, IEnumerable<Level> levels)
{
    // if quantity = 51 AND minmaxflag is 1 
    //then choose the [UnitPrice] where MaxValue is 
    //less than or equal to 51 which is 855. so cost is (51 * 855)

    //if quantity = 51 AND minmaxflag is 2 then 
    //choose the [UnitPrice]     where MinValue is 
    //less than or equal to 51 which is 800. so cost is (51 * 800)

}

如何实现？

Answer 1

这应该提供您所描述的输出集：

private static Level GetLevel(int quantity, int minmaxflag, IEnumerable<Level> levels)
{
    return minmaxflag == 1
        ? levels.Last(l => quantity > l.MinValue)
        : levels.Last(l => quantity >= l.MinValue);
}

public static decimal GetCostOccured(int quantity, int minmaxflag, 
                                     IEnumerable<Level> levels)
{
    return GetLevel(quantity, minmaxflag, levels).UnitPrice * quantity;
}

据我所知，minmaxflag 的工作方式是：

1 -> 选择范围 quantity 在 (MinValue, MaxValue]
2 -> 选择范围 quantity 在 [MinValue, MaxValue)

换句话说，当minmaxflag为1时，价格一旦quantity超过阈值就会下降，而当minmaxflag为2时，一旦 quantity 达到阈值，价格就会下降。这听起来正确吗？

价格匹配算法是否使用 LINQ

Usage of LINQ or not for the price match algorithm

c#

linq

algorithm

c#-4.0

.net-4.5