Sort排序浅聊

集合是什么？笔者简易描述：数组是不可变的，所以我们使用集合来代替。

using.System.Collections; 非泛型集合

using.System.Collections.Gernerc;泛型集合

我们现在创建一个集合，并对其排序~

            ArrayList arr1 = new ArrayList() { , , , , ,  };
            arr1.Sort();
　　　　　　　foreach (int i in arr1)
            {
                Console.WriteLine(i);
            }

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倒叙，我去，想要升序可以Reverse（）翻转下

现在我申明了一个类 Person，字段Name以及Age

           ArrayList arr2 = new ArrayList() { 
 
                new Person(){Name="Tom",Age=},
                new Person(){Name="Chris",Age=},
                new Person(){Name="James",Age=},
                new Person (){Name="Alice",Age=}
            };

            arr2.Sort();

排序的时候发现报错了，日了狗。（编译通过，但是运行出错）

打开错误详情

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" alt="" />

异常详情：{"必须至少有一个对象实现 IComparable。"}

出错原因：没有给对象指定一个标准来判定比较

就好比你告诉班长（C#）对整个班级进行大小排序，班长会无法执行，为什么呢？因为班里面的人（对象）可以比较年龄、身高、体重等等，所以班长不知道你到底需要比较什么？

所以我们需要实现 IComparable 接口来实现对一个标准进行比较

   class Person:IComparable
    {
        private string _name;
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        private int _age;
        public int Age
        {
            get { return _age; }
            set { _age = value; }
        }

        public int CompareTo(object obj)
        {
            Person p = obj as Person;
            if (p != null)
            {
                return this.Age- p.Age;//或者比较Name长度，this.Name.Length
            }
            else
            {
                throw new ArgumentException();
            }
        }

Get:

aaarticlea/png;base64,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" alt="" />     aaarticlea/png;base64,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" alt="" />

如果两个人的年龄一样呢？

aaarticlea/png;base64,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" alt="" />    aaarticlea/png;base64,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" alt="" />

为什么Chirs在前面呢？难道又比较了Name的ASCII，这么智能？笔者认为是因为Chirs申明在前的缘故

那我把 Chirs 和 James 换个位置试试看

aaarticlea/png;base64,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" alt="" />  果然如此

那 aaarticlea/png;base64,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" alt="" /> 这一步骤具体是如何实现的呢？笔者还没有彻底想通，233

那么我们在继续想，能否实现想比较姓名大小、年龄大小等，这些大小都可以比较，根据我选择不同来实现呢？

在Sort方法的重载里可以具体实现比较器 IComparer ，通过传入不同比较器来实现不同比较方式

class Person
    {
        private string _name;
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        private int _age;
        public int Age
        {
            get { return _age; }
            set { _age = value; }
        }
  }
　　
　　　//升序
    class PersonSortByAgeAsc : IComparer
    {
        public int Compare(object x, object y)
        {
            Person p1 = x as Person;
            Person p2 = y as Person;
            if (p1 != null && p2 != null)
            {
                return p1.Age - p2.Age;
            }
            else
            {
                throw new ArgumentException();
            }
        }
    }

arr2.Sort(new PersonSortByAgeAsc());

    /// <summary>
    /// 降序
    /// </summary>
    class PersonSortByAgeDesc : IComparer
    {
        public int Compare(object x, object y)
        {
            Person p1 = x as Person;
            Person p2 = y as Person;
            if (p1 != null && p2 != null)
            {
                return p2.Age - p1.Age;
            }
            else
            {
                throw new ArgumentException();
            }
        }
    }

 arr.Sort(new PersonSortByAgeDesc());   //传入的参数不同， 比较方式不同，更加灵活多变，代码可塑性强！

让班长排序，我们直接提供了一台机器，这台机器即可根据自定义来选择排序方式（多态）