C#中的双向/双向字典? [英] Two-way / bidirectional Dictionary in C#?

问题描述

我想通过以下方式在字典中存储单词:

I want to store words in a dictionary in following way:

我可以逐字获取字码:dict["SomeWord"] -> 123 并逐字码:dict[123] -> <代码>SomeWord"

I can get word code by word: dict["SomeWord"] -> 123 and get word by word code: dict[123] -> "SomeWord"

是真的吗?当然，一种方法是使用两个字典:Dictionary 和 Dictionary 但还有另一种方法吗?

Is it real? Of course one way to do it is two dictionaries: Dictionary<string,int> and Dictionary<int,string> but is there another way?

推荐答案

我快速编写了几个类，让您可以随心所欲.您可能需要使用更多功能对其进行扩展，但这是一个很好的起点.

I wrote a quick couple of classes that lets you do what you want. You'd probably need to extend it with more features, but it is a good starting point.

代码的使用如下:

var map = new Map<int, string>();

map.Add(42, "Hello");

Console.WriteLine(map.Forward[42]);
// Outputs "Hello"

Console.WriteLine(map.Reverse["Hello"]);
//Outputs 42

定义如下:

public class Map<T1, T2>
{
    private Dictionary<T1, T2> _forward = new Dictionary<T1, T2>();
    private Dictionary<T2, T1> _reverse = new Dictionary<T2, T1>();

    public Map()
    {
        this.Forward = new Indexer<T1, T2>(_forward);
        this.Reverse = new Indexer<T2, T1>(_reverse);
    }

    public class Indexer<T3, T4>
    {
        private Dictionary<T3, T4> _dictionary;
        public Indexer(Dictionary<T3, T4> dictionary)
        {
            _dictionary = dictionary;
        }
        public T4 this[T3 index]
        {
            get { return _dictionary[index]; }
            set { _dictionary[index] = value; }
        }
    }

    public void Add(T1 t1, T2 t2)
    {
        _forward.Add(t1, t2);
        _reverse.Add(t2, t1);
    }

    public Indexer<T1, T2> Forward { get; private set; }
    public Indexer<T2, T1> Reverse { get; private set; }
}

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