Creates a list by combining two other lists into one. : List « Collections Data Structure « C# / C Sharp

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

Creates a list by combining two other lists into one.

        

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



        /// <summary>
        /// Creates a list by combining two other lists into one.
        /// </summary>
        /// <typeparam name="T1"></typeparam>
        /// <typeparam name="T2"></typeparam>
        /// <typeparam name="TResult"></typeparam>
        /// <param name="source1">One of the lists to zip.</param>
        /// <param name="source2">One of the lists to zip.</param>
        /// <param name="zipFunction">The delegate used to combine items.</param>
        /// <returns>A new list with the combined items.</returns>
        public static IEnumerable<TResult> Zip<T1, T2, TResult>(this IEnumerable<T1> source1, IEnumerable<T2> source2, Func<T1, T2, TResult> combine)
        {
            if (source1 == null)
                throw new ArgumentNullException("source1");
            if (source2 == null)
                throw new ArgumentNullException("source2");
            if (combine == null)
                throw new ArgumentNullException("combine");

            return ZipIterator<T1, T2, TResult>(source1, source2, combine);
        }

        private static IEnumerable<TResult> ZipIterator<T1, T2, TResult>(IEnumerable<T1> source1, IEnumerable<T2> source2, Func<T1, T2, TResult> combine)
        {
            Debug.Assert(source1 != null, "source1 is null.");
            Debug.Assert(source2 != null, "source2 is null.");
            Debug.Assert(combine != null, "combine is null.");

            using (IEnumerator<T1> data1 = source1.GetEnumerator())
            using (IEnumerator<T2> data2 = source2.GetEnumerator())
                while (data1.MoveNext() && data2.MoveNext())
                {
                    yield return combine(data1.Current, data2.Current);
                }
        }
    }
}

   
    
    
    
    
    
    
    
  

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