C#实现Ruby的负数索引器
public class InvertibleList<T> : List<T>
{
public new T this [ int index]
{
get
{
if (index >= 0) return base [index];
if (Count + index < 0)
throw new IndexOutOfRangeException();
return this [Count + index];
}
set
{
if (index >= 0)
base [index] = value;
else
{
if (Count + index < 0)
throw new IndexOutOfRangeException();
this [Count + index] = value;
}
}
}
}
使用方法：
InvertibleList< string > list= new InvertibleList< string >
{
"1" ,
"2" ,
"3" ,
"4" ,
"5" ,
};
list[-2] = "asd" ;
list.ForEach(Console.WriteLine);
代码很简单，使用也很方便，希望对大家学习C#能够有所帮助
dy("nrwz");