Question

我想在数组中存储一些带有“fromValue”，“ToValue”，“Info”字段的项目，并编写一个例程来搜索“FromValue”和＆amp;之间的输入“值”。 “ToValue”并返回“Info”字段。我需要快速搜索容器。

FromValue,ToValue,Info   
10,20,TX   
24,56,NY   
input =34 returns NY

由于

Answer 1

好的，这个类定义了你的通用范围。

public class Range<TValue, TInfo>
{
    private readonly IComparer<TValue> comparer;

    public Range(IComparer<TValue> comparer)
    {
        this.comparer = comparer;
    }

    public Range(IComparer<TValue> comparer)
        : this(Comparer<TValue>.Default)
    {
    }

    public TValue From { get; set; }
    public TValue To { get; set; }
    public TInfo Info { get; set; }

    public bool InRange(T value, bool inclusive = true)
    {
        var lowerBound = this.comparer.Compare(value, this.From);
        if (lowerBound < 0)
        {
            return false;
        }
        else if (!inclusive && lowerBound == 0)
        {
            return false;
        }

        var upperBound = this.comparer.Compare(value, this.To);
        if (upperBound > 0)
        {
            return false;
        }
        else if (!inclusive && upperBound == 0)
        {
            return false;
        }

        return true;
    }
}

所以，你可以有一系列范围，

IEnumerable<Range<int, string>> ranges = ...

要查找范围内的所有信息值，

var rangesInRange = ranges.Where(r => r.InRange(42)).Select(r => r.Info);

您可以制作专门的容器来改善此操作。

Answer 2

这很简单。在最简单的场景中，只需创建一个类Item

public class Item
{
    public int Id { get; set; }
    public int FromValue { get; set; }
    public int ToValue { get; set; }
    public string Info { get; set; }
}

通过此功能，您可以初始化类型List<T>

的集合

List<Item> Items = new List<Item>()
{
    new Item() {Id = 1, FromValue = 10, ToValue = 20, Info = "TX"}
    new Item() {Id = 2, FromValue = 24, ToValue = 56, Info = "NY"}
    new Item() {Id = 3, FromValue = 15, ToValue = 34, Info = "FL"}
};

通过这个，你可以查询它的内容。

var itemsFromFlorida = Items.Where(it => it.Info == "FL");

Answer 3

<强>类别：

public class Information
        {
            public int FromValue { get; set; }
            public int ToValue { get; set; }
            public string Info { get; set; }
        }

搜索：

List<Information> Informations = new List<Information>(); Information infoObj = new Information(); infoObj.FromValue = 10; infoObj.ToValue = 20; infoObj.Info = "TX"; Informations.Add(infoObj); Information infoObj2 = new Information(); infoObj2.FromValue = 24; infoObj2.ToValue = 56; infoObj2.Info = "NY"; Informations.Add(infoObj); //passing sample input which lies between fromvalue and tovalue int sampleInput = 15; var result = Informations.FirstOrDefault(x => x.FromValue < sampleInput && sampleInput < x.ToValue);

如何存储From-To值并生成数组

3 个答案: