【jq】c#零基础学习之路（5）自己编写简单的Mylist<T> 

  1   public class MyList<T> where T : IComparable
  2     {
  3 
  4         private T[] array;
  5         private int count;
  6         public MyList(int size)
  7         {
  8             if (size >= 0)
  9             {
 10                 array = new T[size];
 11             }
 12 
 13         }
 14         public MyList()
 15         {
 16             array = new T[0];
 17         }
 18         public int Capacity
 19         {
 20             get
 21             {
 22                 return array.Length;
 23             }
 24         }
 25         public int Count
 26         {
 27             get { return count; }
 28         }
 29         public void Add(T a)
 30         {
 31             if (Count == Capacity)
 32             {
 33                 if (Capacity == 0)
 34                 {
 35                     array = new T[4];
 36                 }
 37                 else
 38                 {
 39                     var newarray = new T[Capacity * 2];
 40                     Array.Copy(array, newarray, count);
 41                     array = newarray;
 42                 }
 43             }
 44             array[count] = a;
 45             count++;
 46         }
 47         public T GetItem(int index)
 48         {
 49             if (index >= 0 && index <= count - 1)
 50             {
 51                 return array[index];
 52             }
 53             else
 54             {
 55                 throw new Exception("超出索引");
 56             }
 57         }
 58         public T this[int index]
 59         {
 60             get
 61             {
 62                 return GetItem(index);
 63             }
 64             set
 65             {
 66 
 67                 if (index >= 0 && index <= count - 1)
 68                 {
 69                     array[index] = value;
 70                 }
 71                 else
 72                 {
 73                     throw new Exception("超出索引");
 74                 }
 75             }
 76         }
 77         public void Insert(int a, T t)
 78         {
 79             if (a >= 0 && a <= Count - 1)
 80             {
 81                 if (count == Capacity)
 82                 {
 83                     var newarray = new T[Capacity * 2];
 84                     Array.Copy(array, newarray, count);
 85                     array = newarray;
 86                 }
 87                 else
 88                 {
 89                     for (int i = count - 1; i >= a; i--)
 90                     {
 91                         array[i + 1] = array[i];
 92                     }
 93                     array[a] = t;
 94                     count++;
 95                 }
 96             }
 97         }
 98         public void RemoveAt(int a)
 99         {
100             if (a >= 0 && a <= Count - 1)
101             {
102                 for (int i = a + 1; i <= count - 1; i++)
103                 {
104                     array[i - 1] = array[i];
105                 }
106                 count--;
107             }
108         }
109         public int IndexOf(T t)
110         {
111             for (int i = 0; i <= count - 1; i++)
112             {
113                 if (array[i].Equals(t))
114                 {
115                     return i;
116                 }
117             }
118             return -1;
119         }
120         public int LastIndexOf(T t)
121         {
122             for (int i = count - 1; i >= 0; i--)
123             {
124                 if (array[i].Equals(t))
125                 {
126                     return i;
127                 }
128             }
129             return -1;
130         }
131         public void Sort()
132         {
133             for (int j = 0; j < count - 1; j++)
134             {
135 
136 
137                 for (int i = 0; i < count - 1 - j; i++)
138                 {
139                     if (array[i].CompareTo(array[i + 1]) > 0)
140                     {
141                         T tamp = array[i];
142                         array[i] = array[i + 1];
143                         array[i + 1] = tamp;
144                     }
145                 }
146             }
147         }
148     }
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posted @ 2016-07-02 17:48  2z1h5  阅读(277)  评论(0)  编辑  收藏  举报