Dictionary应用

  public class Person
    {
        private string m_name;
        private int m_birthday;
        public Person(string name, int birthday)
        {
            m_name = name;
            m_birthday = birthday;
        }
        public override int GetHashCode()
        {
            return m_birthday * m_name.GetHashCode();
        }
        public override bool Equals(object obj)
        {
            Person person = obj as Person;
            if (person != null)
                return (person.GetHashCode() == GetHashCode());
            else
                return false;
        }
      
    }
    public class Article : IComparable<Article>
    {
        public decimal price;
        public Article(decimal price)
        {
            this.price = price;
        }
        int IComparable<Article>.CompareTo(Article art)
        {
            return price.CompareTo(art.price);
        }
    }

        /// <summary>
        /// Dictionary遍历
        /// </summary>
        public static void DictionaryDisplay()
        {
            Dictionary<string, string> dico = new Dictionary<string, string>();
            dico.Add("carl", "23");
            dico.Add("hubcarl", "24");
            foreach (KeyValuePair<string, string> item in dico)
            {
                System.Console.WriteLine(item.Key + ":" + item.Value);
            }
        }
        /// <summary>
        /// GetHashCode
        /// </summary>
        public static void Dictionary()
        {
            //object 类提供了Equals()和GetHashCode()两个方法
            //Dictionary<K,V>的算法把这两个算法用于在K类型上。
            //如果打算复写一个类的Equals()方法，而这个类的实例又是用于表示算列表中的键，那就该同时复写GetHashCode()方法
            //以满足如下约束：对于x和y类型的所有实例，如果x.GetHashCode()和y.GetHashCode()返回两个不同的整数，
            //那么x.Equals(y)和y.Equals(x)都必须返回false.
            Dictionary<Person, string> dictionary = new Dictionary<Person, string>();
            Person person1 = new Person("person1", 1986);
            Person person2 = new Person("person2", 1987);
            dictionary.Add(person1, "carl");
            dictionary.Add(person2, "anan");
            Console.WriteLine(dictionary.ContainsKey(person1));

        }
        /// <summary>
        /// 自定义类型排序
        /// </summary>
        public void ArraySort()
        {
            Article [] arr={new Article(24M),new Article (25M),new Article (23M)};
            Array.Sort<Article>(arr);

        }