Csharp/CSharp Tutorial/LINQ/Reverse

Материал из .Net Framework эксперт
Версия от 12:18, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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An Example Calling the Reverse Operator

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
    public static void Main() {
        string[] presidents = {"lore", "Truman", "Tailer", "Van", "Washington", "Wilson"};
        IEnumerable<string> items = presidents.Reverse();
        foreach (string item in items)
            Console.WriteLine(item);
    }
}

Get all reversed cars

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Linq;
using System.Linq;
    class Car
    {
        public string PetName;
        public string Color;
        public int Speed;
        public string Make;
        
        public override string ToString()
        {
            return string.Format("Make={0}, Color={1}, Speed={2}, PetName={3}",Make, Color, Speed, PetName);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Car[] myCars = new []{
                new Car{ PetName = "A", Color = "Silver", Speed = 100, Make = "BMW"},
                new Car{ PetName = "B", Color = "Black", Speed = 55, Make = "VW"},
                new Car{ PetName = "C", Color = "White", Speed = 43, Make = "Ford"}
            };
        
            var subset = (from c in myCars select c).Reverse<Car>();
            foreach (Car c in subset)
            {
                Console.WriteLine(c.ToString());
            }
        
        }
    }

Reverse does exactly as it says

using System;
using System.Collections.Generic;
using System.Linq;
public class MainClass {
    public static void Main() {
        int[] numbers = { 10, 9, 8, 7, 6 };
        IEnumerable<int> reversed = numbers.Reverse();    // { 6, 7, 8, 9, 10 }
    }
}