Creates a list by repeating another list. : List « Collections Data Structure « C# / C Sharp

1. C# / C Sharp
2. Collections Data Structure
3. List

Creates a list by repeating another list.

        

using System.Linq;
using System.Diagnostics;
namespace System.Collections.Generic
{
    public static class EnumeratorExtensions
    {

        /// <summary>
        /// Creates a list by repeating another list.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="source">The list to repeat.</param>
        /// <param name="count">The number of items to return.</param>
        /// <returns>A circular list of items.</returns>
        public static IEnumerable<T> Cycle<T>(this IEnumerable<T> source, int count)
        {
            if (source == null)
                throw new ArgumentNullException("source");

            return CycleIterator<T>(source, count);
        }

        private static IEnumerable<T> CycleIterator<T>(IEnumerable<T> source, int count)
        {
            Debug.Assert(source != null, "source is null.");

            int i = 0;
            while (i < count)
                using (IEnumerator<T> data = source.GetEnumerator())
                {
                    while (i < count && data.MoveNext())
                    {
                        yield return data.Current;
                        i++;
                    }
                }
        }

    }
}

   
    
    
    
    
    
    
    
  

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