Iterator [C#] class Count : IEnumerable<string>

Series
Iterator [C#] class Count : IEnumerable<string> - GetEnumerator

More Code 2018. 6. 15. 20:16
// C# : Iterator

using System;
using System.Collections;
using System.Collections.Generic;

namespace Iteration
{
    class Program
    {
        static void Main(string[] args)
        {
            Count myCount = new Count();

            IEnumerator<string> genericEnumerator = myCount.GetEnumerator();

            Console.WriteLine(genericEnumerator.MoveNext()); // True
            Console.WriteLine(genericEnumerator.Current);    // one

            Console.WriteLine(genericEnumerator.MoveNext()); // True
            Console.WriteLine(genericEnumerator.Current);    // two

            Console.WriteLine(genericEnumerator.MoveNext()); // True
            Console.WriteLine(genericEnumerator.Current);    // three

            Console.WriteLine(genericEnumerator.MoveNext()); // False
            Console.WriteLine(genericEnumerator.Current);    // three

            Console.WriteLine("---- End of 1st iteration ----");

            IEnumerator objectiveEnumerator = myCount.GetEnumerator();

            Console.WriteLine(objectiveEnumerator.MoveNext()); // True
            Console.WriteLine(objectiveEnumerator.Current);    // one

            Console.WriteLine(objectiveEnumerator.MoveNext()); // True
            Console.WriteLine(objectiveEnumerator.Current);    // two

            Console.WriteLine(objectiveEnumerator.MoveNext()); // True
            Console.WriteLine(objectiveEnumerator.Current);    // three

            Console.WriteLine(objectiveEnumerator.MoveNext()); // False
            Console.WriteLine(objectiveEnumerator.Current);    // three

            Console.WriteLine("---- End of 2nd iteration ----");
        }
    }

    class Count : IEnumerable<string>
    {
        public IEnumerator<string> GetEnumerator()
        {
            yield return "one";
            yield return "two";
            yield return "three";
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            throw new NotImplementedException();
        }
    }
}

/* Output
True
one
True
two
True
three
False
three
---- End of 1st iteration ----
True
one
True
two
True
three
False
three
---- End of 2nd iteration ----
*/