Dictionary应用

川长思鸟来 2021-12-24 15:17 238阅读 0赞

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 代码

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);  
  
        \}

转载于:https://www.cnblogs.com/hubcarl/archive/2010/04/07/1706356.html

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