index和range的简单使用

index和range的简单使用

1.

        static void Main(string[] args)
        {
            string[] words = new string[]
         {
                        "The",      // 0 9
                        "quick",    // 1 8
                        "brown",    // 2 7
                        "fox",      // 3 6
                        "jumped",   // 4 5
                        "over",     // 5 4
                        "the",      // 6 3
                        "lazy",     // 7 2
                        "dog"       // 8 1
         };

            // Index
            Index k = ^1;
            Console.WriteLine(words[1]);
            Console.WriteLine(words[words.Length - 1]);
            Console.WriteLine(words[^1]);
            Console.WriteLine(words[k]);

            //range 范围
            Range p = 0..3;
            string[] lists = words[p];
            foreach (var list in lists)
            {
                Console.WriteLine($"foreach:{list}");
            }

            Console.Read();
        }

2.类中使用

    class Program
    {
        static void Main(string[] args)
        {
            Point point  = new Point();
            Console.WriteLine(point[0]);
            point[0] = "gongdonghai";
            Console.WriteLine(point[0]);
            Console.Read();
        }
    }

    public class Point
    {
        public string[] gamma = new string[]
         {
                  "The",      // 0 9
                  "quick",    // 1 8
                  "brown",    // 2 7
                  "fox",      // 3 6
                  "jumped",   // 4 5
                  "over",     // 5 4
                  "the",      // 6 3
                  "lazy",     // 7 2
                  "dog"       // 8 1
         };

        //类级别索引：this
        public string this[int index]
        {
            get
            {
                return gamma[index];
            }
            set
            {
                gamma[index] = value;
            }
        }
    }

注意点