Hash Table是一種有key value的資料結構~

我們能在Hash Table中存入一個value然後將它對應到key~

其目的是為了~ 加快程式訪問value的速度(O(1))~

學習目標: Hash Table概念及實務

學習難度: ☆☆☆

namespace ConsoleApp1
{
    class MainProgram
    {
        static void Main()
        {
            Hashtable hashtable = new Hashtable();

            hashtable.Add("wilson", "student"); //wilson(key)，student(value)

            hashtable.Add("william", "student"); //wilson(key)，student(value)

            hashtable.Remove("william"); //remove key

            Console.WriteLine(hashtable.ContainsKey("wilson")); //回傳true

            Console.WriteLine(hashtable.ContainsValue("student")); //回傳true

            foreach (DictionaryEntry tuple in hashtable)
            {
                Console.Write(tuple.Key + " ");

                Console.Write(tuple.Value + "\n");
            }
        }
    }
}

參考資料:

https://www.youtube.com/watch?v=s8YcbwVl-HI&ab_channel=RenaissanceCoders

https://www.geeksforgeeks.org/hashing-data-structure/