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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; } } } }</div>
使用方法:
InvertibleList<string> list=new InvertibleList<string> { "1", "2", "3", "4", "5", }; list[-2] = "asd"; list.ForEach(Console.WriteLine);</div>
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
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